diff options
Diffstat (limited to 'externals/demangle/llvm')
| -rw-r--r-- | externals/demangle/llvm/Demangle/Demangle.h | 104 | ||||
| -rw-r--r-- | externals/demangle/llvm/Demangle/DemangleConfig.h | 93 | ||||
| -rw-r--r-- | externals/demangle/llvm/Demangle/ItaniumDemangle.h | 5582 | ||||
| -rw-r--r-- | externals/demangle/llvm/Demangle/StringView.h | 127 | ||||
| -rw-r--r-- | externals/demangle/llvm/Demangle/Utility.h | 192 |
5 files changed, 6098 insertions, 0 deletions
diff --git a/externals/demangle/llvm/Demangle/Demangle.h b/externals/demangle/llvm/Demangle/Demangle.h new file mode 100644 index 000000000..5b673e4e1 --- /dev/null +++ b/externals/demangle/llvm/Demangle/Demangle.h @@ -0,0 +1,104 @@ +//===--- Demangle.h ---------------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-FileCopyrightText: Part of the LLVM Project +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_DEMANGLE_DEMANGLE_H +#define LLVM_DEMANGLE_DEMANGLE_H + +#include <cstddef> +#include <string> + +namespace llvm { +/// This is a llvm local version of __cxa_demangle. Other than the name and +/// being in the llvm namespace it is identical. +/// +/// The mangled_name is demangled into buf and returned. If the buffer is not +/// large enough, realloc is used to expand it. +/// +/// The *status will be set to a value from the following enumeration +enum : int { + demangle_unknown_error = -4, + demangle_invalid_args = -3, + demangle_invalid_mangled_name = -2, + demangle_memory_alloc_failure = -1, + demangle_success = 0, +}; + +char *itaniumDemangle(const char *mangled_name, char *buf, size_t *n, + int *status); + + +enum MSDemangleFlags { + MSDF_None = 0, + MSDF_DumpBackrefs = 1 << 0, + MSDF_NoAccessSpecifier = 1 << 1, + MSDF_NoCallingConvention = 1 << 2, + MSDF_NoReturnType = 1 << 3, + MSDF_NoMemberType = 1 << 4, +}; +char *microsoftDemangle(const char *mangled_name, char *buf, size_t *n, + int *status, MSDemangleFlags Flags = MSDF_None); + +/// "Partial" demangler. This supports demangling a string into an AST +/// (typically an intermediate stage in itaniumDemangle) and querying certain +/// properties or partially printing the demangled name. +struct ItaniumPartialDemangler { + ItaniumPartialDemangler(); + + ItaniumPartialDemangler(ItaniumPartialDemangler &&Other); + ItaniumPartialDemangler &operator=(ItaniumPartialDemangler &&Other); + + /// Demangle into an AST. Subsequent calls to the rest of the member functions + /// implicitly operate on the AST this produces. + /// \return true on error, false otherwise + bool partialDemangle(const char *MangledName); + + /// Just print the entire mangled name into Buf. Buf and N behave like the + /// second and third parameters to itaniumDemangle. + char *finishDemangle(char *Buf, size_t *N) const; + + /// Get the base name of a function. This doesn't include trailing template + /// arguments, ie for "a::b<int>" this function returns "b". + char *getFunctionBaseName(char *Buf, size_t *N) const; + + /// Get the context name for a function. For "a::b::c", this function returns + /// "a::b". + char *getFunctionDeclContextName(char *Buf, size_t *N) const; + + /// Get the entire name of this function. + char *getFunctionName(char *Buf, size_t *N) const; + + /// Get the parameters for this function. + char *getFunctionParameters(char *Buf, size_t *N) const; + char *getFunctionReturnType(char *Buf, size_t *N) const; + + /// If this function has any any cv or reference qualifiers. These imply that + /// the function is a non-static member function. + bool hasFunctionQualifiers() const; + + /// If this symbol describes a constructor or destructor. + bool isCtorOrDtor() const; + + /// If this symbol describes a function. + bool isFunction() const; + + /// If this symbol describes a variable. + bool isData() const; + + /// If this symbol is a <special-name>. These are generally implicitly + /// generated by the implementation, such as vtables and typeinfo names. + bool isSpecialName() const; + + ~ItaniumPartialDemangler(); +private: + void *RootNode; + void *Context; +}; +} // namespace llvm + +#endif diff --git a/externals/demangle/llvm/Demangle/DemangleConfig.h b/externals/demangle/llvm/Demangle/DemangleConfig.h new file mode 100644 index 000000000..a8aef9df1 --- /dev/null +++ b/externals/demangle/llvm/Demangle/DemangleConfig.h @@ -0,0 +1,93 @@ +//===--- DemangleConfig.h ---------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-FileCopyrightText: Part of the LLVM Project +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file contains a variety of feature test macros copied from +// include/llvm/Support/Compiler.h so that LLVMDemangle does not need to take +// a dependency on LLVMSupport. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_DEMANGLE_COMPILER_H +#define LLVM_DEMANGLE_COMPILER_H + +#ifndef __has_feature +#define __has_feature(x) 0 +#endif + +#ifndef __has_cpp_attribute +#define __has_cpp_attribute(x) 0 +#endif + +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifndef __has_builtin +#define __has_builtin(x) 0 +#endif + +#ifndef DEMANGLE_GNUC_PREREQ +#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) +#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ + ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ + ((maj) << 20) + ((min) << 10) + (patch)) +#elif defined(__GNUC__) && defined(__GNUC_MINOR__) +#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ + ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) +#else +#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0 +#endif +#endif + +#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0) +#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__)) +#else +#define DEMANGLE_ATTRIBUTE_USED +#endif + +#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0) +#define DEMANGLE_UNREACHABLE __builtin_unreachable() +#elif defined(_MSC_VER) +#define DEMANGLE_UNREACHABLE __assume(false) +#else +#define DEMANGLE_UNREACHABLE +#endif + +#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0) +#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline)) +#elif defined(_MSC_VER) +#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline) +#else +#define DEMANGLE_ATTRIBUTE_NOINLINE +#endif + +#if !defined(NDEBUG) +#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED +#else +#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE +#endif + +#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) +#define DEMANGLE_FALLTHROUGH [[fallthrough]] +#elif __has_cpp_attribute(gnu::fallthrough) +#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]] +#elif !__cplusplus +// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious +// error when __has_cpp_attribute is given a scoped attribute in C mode. +#define DEMANGLE_FALLTHROUGH +#elif __has_cpp_attribute(clang::fallthrough) +#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]] +#else +#define DEMANGLE_FALLTHROUGH +#endif + +#define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle { +#define DEMANGLE_NAMESPACE_END } } + +#endif diff --git a/externals/demangle/llvm/Demangle/ItaniumDemangle.h b/externals/demangle/llvm/Demangle/ItaniumDemangle.h new file mode 100644 index 000000000..64b35c142 --- /dev/null +++ b/externals/demangle/llvm/Demangle/ItaniumDemangle.h @@ -0,0 +1,5582 @@ +//===------------------------- ItaniumDemangle.h ----------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-FileCopyrightText: Part of the LLVM Project +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// Generic itanium demangler library. This file has two byte-per-byte identical +// copies in the source tree, one in libcxxabi, and the other in llvm. +// +//===----------------------------------------------------------------------===// + +#ifndef DEMANGLE_ITANIUMDEMANGLE_H +#define DEMANGLE_ITANIUMDEMANGLE_H + +// FIXME: (possibly) incomplete list of features that clang mangles that this +// file does not yet support: +// - C++ modules TS + +#include "DemangleConfig.h" +#include "StringView.h" +#include "Utility.h" +#include <cassert> +#include <cctype> +#include <cstdio> +#include <cstdlib> +#include <cstring> +#include <numeric> +#include <utility> + +#define FOR_EACH_NODE_KIND(X) \ + X(NodeArrayNode) \ + X(DotSuffix) \ + X(VendorExtQualType) \ + X(QualType) \ + X(ConversionOperatorType) \ + X(PostfixQualifiedType) \ + X(ElaboratedTypeSpefType) \ + X(NameType) \ + X(AbiTagAttr) \ + X(EnableIfAttr) \ + X(ObjCProtoName) \ + X(PointerType) \ + X(ReferenceType) \ + X(PointerToMemberType) \ + X(ArrayType) \ + X(FunctionType) \ + X(NoexceptSpec) \ + X(DynamicExceptionSpec) \ + X(FunctionEncoding) \ + X(LiteralOperator) \ + X(SpecialName) \ + X(CtorVtableSpecialName) \ + X(QualifiedName) \ + X(NestedName) \ + X(LocalName) \ + X(VectorType) \ + X(PixelVectorType) \ + X(SyntheticTemplateParamName) \ + X(TypeTemplateParamDecl) \ + X(NonTypeTemplateParamDecl) \ + X(TemplateTemplateParamDecl) \ + X(TemplateParamPackDecl) \ + X(ParameterPack) \ + X(TemplateArgumentPack) \ + X(ParameterPackExpansion) \ + X(TemplateArgs) \ + X(ForwardTemplateReference) \ + X(NameWithTemplateArgs) \ + X(GlobalQualifiedName) \ + X(StdQualifiedName) \ + X(ExpandedSpecialSubstitution) \ + X(SpecialSubstitution) \ + X(CtorDtorName) \ + X(DtorName) \ + X(UnnamedTypeName) \ + X(ClosureTypeName) \ + X(StructuredBindingName) \ + X(BinaryExpr) \ + X(ArraySubscriptExpr) \ + X(PostfixExpr) \ + X(ConditionalExpr) \ + X(MemberExpr) \ + X(EnclosingExpr) \ + X(CastExpr) \ + X(SizeofParamPackExpr) \ + X(CallExpr) \ + X(NewExpr) \ + X(DeleteExpr) \ + X(PrefixExpr) \ + X(FunctionParam) \ + X(ConversionExpr) \ + X(InitListExpr) \ + X(FoldExpr) \ + X(ThrowExpr) \ + X(UUIDOfExpr) \ + X(BoolExpr) \ + X(StringLiteral) \ + X(LambdaExpr) \ + X(IntegerCastExpr) \ + X(IntegerLiteral) \ + X(FloatLiteral) \ + X(DoubleLiteral) \ + X(LongDoubleLiteral) \ + X(BracedExpr) \ + X(BracedRangeExpr) + +DEMANGLE_NAMESPACE_BEGIN + +// Base class of all AST nodes. The AST is built by the parser, then is +// traversed by the printLeft/Right functions to produce a demangled string. +class Node { +public: + enum Kind : unsigned char { +#define ENUMERATOR(NodeKind) K ## NodeKind, + FOR_EACH_NODE_KIND(ENUMERATOR) +#undef ENUMERATOR + }; + + /// Three-way bool to track a cached value. Unknown is possible if this node + /// has an unexpanded parameter pack below it that may affect this cache. + enum class Cache : unsigned char { Yes, No, Unknown, }; + +private: + Kind K; + + // FIXME: Make these protected. +public: + /// Tracks if this node has a component on its right side, in which case we + /// need to call printRight. + Cache RHSComponentCache; + + /// Track if this node is a (possibly qualified) array type. This can affect + /// how we format the output string. + Cache ArrayCache; + + /// Track if this node is a (possibly qualified) function type. This can + /// affect how we format the output string. + Cache FunctionCache; + +public: + Node(Kind K_, Cache RHSComponentCache_ = Cache::No, + Cache ArrayCache_ = Cache::No, Cache FunctionCache_ = Cache::No) + : K(K_), RHSComponentCache(RHSComponentCache_), ArrayCache(ArrayCache_), + FunctionCache(FunctionCache_) {} + + /// Visit the most-derived object corresponding to this object. + template<typename Fn> void visit(Fn F) const; + + // The following function is provided by all derived classes: + // + // Call F with arguments that, when passed to the constructor of this node, + // would construct an equivalent node. + //template<typename Fn> void match(Fn F) const; + + bool hasRHSComponent(OutputStream &S) const { + if (RHSComponentCache != Cache::Unknown) + return RHSComponentCache == Cache::Yes; + return hasRHSComponentSlow(S); + } + + bool hasArray(OutputStream &S) const { + if (ArrayCache != Cache::Unknown) + return ArrayCache == Cache::Yes; + return hasArraySlow(S); + } + + bool hasFunction(OutputStream &S) const { + if (FunctionCache != Cache::Unknown) + return FunctionCache == Cache::Yes; + return hasFunctionSlow(S); + } + + Kind getKind() const { return K; } + + virtual bool hasRHSComponentSlow(OutputStream &) const { return false; } + virtual bool hasArraySlow(OutputStream &) const { return false; } + virtual bool hasFunctionSlow(OutputStream &) const { return false; } + + // Dig through "glue" nodes like ParameterPack and ForwardTemplateReference to + // get at a node that actually represents some concrete syntax. + virtual const Node *getSyntaxNode(OutputStream &) const { + return this; + } + + void print(OutputStream &S) const { + printLeft(S); + if (RHSComponentCache != Cache::No) + printRight(S); + } + + // Print the "left" side of this Node into OutputStream. + virtual void printLeft(OutputStream &) const = 0; + + // Print the "right". This distinction is necessary to represent C++ types + // that appear on the RHS of their subtype, such as arrays or functions. + // Since most types don't have such a component, provide a default + // implementation. + virtual void printRight(OutputStream &) const {} + + virtual StringView getBaseName() const { return StringView(); } + + // Silence compiler warnings, this dtor will never be called. + virtual ~Node() = default; + +#ifndef NDEBUG + DEMANGLE_DUMP_METHOD void dump() const; +#endif +}; + +class NodeArray { + Node **Elements; + size_t NumElements; + +public: + NodeArray() : Elements(nullptr), NumElements(0) {} + NodeArray(Node **Elements_, size_t NumElements_) + : Elements(Elements_), NumElements(NumElements_) {} + + bool empty() const { return NumElements == 0; } + size_t size() const { return NumElements; } + + Node **begin() const { return Elements; } + Node **end() const { return Elements + NumElements; } + + Node *operator[](size_t Idx) const { return Elements[Idx]; } + + void printWithComma(OutputStream &S) const { + bool FirstElement = true; + for (size_t Idx = 0; Idx != NumElements; ++Idx) { + size_t BeforeComma = S.getCurrentPosition(); + if (!FirstElement) + S += ", "; + size_t AfterComma = S.getCurrentPosition(); + Elements[Idx]->print(S); + + // Elements[Idx] is an empty parameter pack expansion, we should erase the + // comma we just printed. + if (AfterComma == S.getCurrentPosition()) { + S.setCurrentPosition(BeforeComma); + continue; + } + + FirstElement = false; + } + } +}; + +struct NodeArrayNode : Node { + NodeArray Array; + NodeArrayNode(NodeArray Array_) : Node(KNodeArrayNode), Array(Array_) {} + + template<typename Fn> void match(Fn F) const { F(Array); } + + void printLeft(OutputStream &S) const override { + Array.printWithComma(S); + } +}; + +class DotSuffix final : public Node { + const Node *Prefix; + const StringView Suffix; + +public: + DotSuffix(const Node *Prefix_, StringView Suffix_) + : Node(KDotSuffix), Prefix(Prefix_), Suffix(Suffix_) {} + + template<typename Fn> void match(Fn F) const { F(Prefix, Suffix); } + + void printLeft(OutputStream &s) const override { + Prefix->print(s); + s += " ("; + s += Suffix; + s += ")"; + } +}; + +class VendorExtQualType final : public Node { + const Node *Ty; + StringView Ext; + +public: + VendorExtQualType(const Node *Ty_, StringView Ext_) + : Node(KVendorExtQualType), Ty(Ty_), Ext(Ext_) {} + + template<typename Fn> void match(Fn F) const { F(Ty, Ext); } + + void printLeft(OutputStream &S) const override { + Ty->print(S); + S += " "; + S += Ext; + } +}; + +enum FunctionRefQual : unsigned char { + FrefQualNone, + FrefQualLValue, + FrefQualRValue, +}; + +enum Qualifiers { + QualNone = 0, + QualConst = 0x1, + QualVolatile = 0x2, + QualRestrict = 0x4, +}; + +inline Qualifiers operator|=(Qualifiers &Q1, Qualifiers Q2) { + return Q1 = static_cast<Qualifiers>(Q1 | Q2); +} + +class QualType final : public Node { +protected: + const Qualifiers Quals; + const Node *Child; + + void printQuals(OutputStream &S) const { + if (Quals & QualConst) + S += " const"; + if (Quals & QualVolatile) + S += " volatile"; + if (Quals & QualRestrict) + S += " restrict"; + } + +public: + QualType(const Node *Child_, Qualifiers Quals_) + : Node(KQualType, Child_->RHSComponentCache, + Child_->ArrayCache, Child_->FunctionCache), + Quals(Quals_), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Child, Quals); } + + bool hasRHSComponentSlow(OutputStream &S) const override { + return Child->hasRHSComponent(S); + } + bool hasArraySlow(OutputStream &S) const override { + return Child->hasArray(S); + } + bool hasFunctionSlow(OutputStream &S) const override { + return Child->hasFunction(S); + } + + void printLeft(OutputStream &S) const override { + Child->printLeft(S); + printQuals(S); + } + + void printRight(OutputStream &S) const override { Child->printRight(S); } +}; + +class ConversionOperatorType final : public Node { + const Node *Ty; + +public: + ConversionOperatorType(const Node *Ty_) + : Node(KConversionOperatorType), Ty(Ty_) {} + + template<typename Fn> void match(Fn F) const { F(Ty); } + + void printLeft(OutputStream &S) const override { + S += "operator "; + Ty->print(S); + } +}; + +class PostfixQualifiedType final : public Node { + const Node *Ty; + const StringView Postfix; + +public: + PostfixQualifiedType(Node *Ty_, StringView Postfix_) + : Node(KPostfixQualifiedType), Ty(Ty_), Postfix(Postfix_) {} + + template<typename Fn> void match(Fn F) const { F(Ty, Postfix); } + + void printLeft(OutputStream &s) const override { + Ty->printLeft(s); + s += Postfix; + } +}; + +class NameType final : public Node { + const StringView Name; + +public: + NameType(StringView Name_) : Node(KNameType), Name(Name_) {} + + template<typename Fn> void match(Fn F) const { F(Name); } + + StringView getName() const { return Name; } + StringView getBaseName() const override { return Name; } + + void printLeft(OutputStream &s) const override { s += Name; } +}; + +class ElaboratedTypeSpefType : public Node { + StringView Kind; + Node *Child; +public: + ElaboratedTypeSpefType(StringView Kind_, Node *Child_) + : Node(KElaboratedTypeSpefType), Kind(Kind_), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Kind, Child); } + + void printLeft(OutputStream &S) const override { + S += Kind; + S += ' '; + Child->print(S); + } +}; + +struct AbiTagAttr : Node { + Node *Base; + StringView Tag; + + AbiTagAttr(Node* Base_, StringView Tag_) + : Node(KAbiTagAttr, Base_->RHSComponentCache, + Base_->ArrayCache, Base_->FunctionCache), + Base(Base_), Tag(Tag_) {} + + template<typename Fn> void match(Fn F) const { F(Base, Tag); } + + void printLeft(OutputStream &S) const override { + Base->printLeft(S); + S += "[abi:"; + S += Tag; + S += "]"; + } +}; + +class EnableIfAttr : public Node { + NodeArray Conditions; +public: + EnableIfAttr(NodeArray Conditions_) + : Node(KEnableIfAttr), Conditions(Conditions_) {} + + template<typename Fn> void match(Fn F) const { F(Conditions); } + + void printLeft(OutputStream &S) const override { + S += " [enable_if:"; + Conditions.printWithComma(S); + S += ']'; + } +}; + +class ObjCProtoName : public Node { + const Node *Ty; + StringView Protocol; + + friend class PointerType; + +public: + ObjCProtoName(const Node *Ty_, StringView Protocol_) + : Node(KObjCProtoName), Ty(Ty_), Protocol(Protocol_) {} + + template<typename Fn> void match(Fn F) const { F(Ty, Protocol); } + + bool isObjCObject() const { + return Ty->getKind() == KNameType && + static_cast<const NameType *>(Ty)->getName() == "objc_object"; + } + + void printLeft(OutputStream &S) const override { + Ty->print(S); + S += "<"; + S += Protocol; + S += ">"; + } +}; + +class PointerType final : public Node { + const Node *Pointee; + +public: + PointerType(const Node *Pointee_) + : Node(KPointerType, Pointee_->RHSComponentCache), + Pointee(Pointee_) {} + + template<typename Fn> void match(Fn F) const { F(Pointee); } + + bool hasRHSComponentSlow(OutputStream &S) const override { + return Pointee->hasRHSComponent(S); + } + + void printLeft(OutputStream &s) const override { + // We rewrite objc_object<SomeProtocol>* into id<SomeProtocol>. + if (Pointee->getKind() != KObjCProtoName || + !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) { + Pointee->printLeft(s); + if (Pointee->hasArray(s)) + s += " "; + if (Pointee->hasArray(s) || Pointee->hasFunction(s)) + s += "("; + s += "*"; + } else { + const auto *objcProto = static_cast<const ObjCProtoName *>(Pointee); + s += "id<"; + s += objcProto->Protocol; + s += ">"; + } + } + + void printRight(OutputStream &s) const override { + if (Pointee->getKind() != KObjCProtoName || + !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) { + if (Pointee->hasArray(s) || Pointee->hasFunction(s)) + s += ")"; + Pointee->printRight(s); + } + } +}; + +enum class ReferenceKind { + LValue, + RValue, +}; + +// Represents either a LValue or an RValue reference type. +class ReferenceType : public Node { + const Node *Pointee; + ReferenceKind RK; + + mutable bool Printing = false; + + // Dig through any refs to refs, collapsing the ReferenceTypes as we go. The + // rule here is rvalue ref to rvalue ref collapses to a rvalue ref, and any + // other combination collapses to a lvalue ref. + std::pair<ReferenceKind, const Node *> collapse(OutputStream &S) const { + auto SoFar = std::make_pair(RK, Pointee); + for (;;) { + const Node *SN = SoFar.second->getSyntaxNode(S); + if (SN->getKind() != KReferenceType) + break; + auto *RT = static_cast<const ReferenceType *>(SN); + SoFar.second = RT->Pointee; + SoFar.first = std::min(SoFar.first, RT->RK); + } + return SoFar; + } + +public: + ReferenceType(const Node *Pointee_, ReferenceKind RK_) + : Node(KReferenceType, Pointee_->RHSComponentCache), + Pointee(Pointee_), RK(RK_) {} + + template<typename Fn> void match(Fn F) const { F(Pointee, RK); } + + bool hasRHSComponentSlow(OutputStream &S) const override { + return Pointee->hasRHSComponent(S); + } + + void printLeft(OutputStream &s) const override { + if (Printing) + return; + SwapAndRestore<bool> SavePrinting(Printing, true); + std::pair<ReferenceKind, const Node *> Collapsed = collapse(s); + Collapsed.second->printLeft(s); + if (Collapsed.second->hasArray(s)) + s += " "; + if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s)) + s += "("; + + s += (Collapsed.first == ReferenceKind::LValue ? "&" : "&&"); + } + void printRight(OutputStream &s) const override { + if (Printing) + return; + SwapAndRestore<bool> SavePrinting(Printing, true); + std::pair<ReferenceKind, const Node *> Collapsed = collapse(s); + if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s)) + s += ")"; + Collapsed.second->printRight(s); + } +}; + +class PointerToMemberType final : public Node { + const Node *ClassType; + const Node *MemberType; + +public: + PointerToMemberType(const Node *ClassType_, const Node *MemberType_) + : Node(KPointerToMemberType, MemberType_->RHSComponentCache), + ClassType(ClassType_), MemberType(MemberType_) {} + + template<typename Fn> void match(Fn F) const { F(ClassType, MemberType); } + + bool hasRHSComponentSlow(OutputStream &S) const override { + return MemberType->hasRHSComponent(S); + } + + void printLeft(OutputStream &s) const override { + MemberType->printLeft(s); + if (MemberType->hasArray(s) || MemberType->hasFunction(s)) + s += "("; + else + s += " "; + ClassType->print(s); + s += "::*"; + } + + void printRight(OutputStream &s) const override { + if (MemberType->hasArray(s) || MemberType->hasFunction(s)) + s += ")"; + MemberType->printRight(s); + } +}; + +class NodeOrString { + const void *First; + const void *Second; + +public: + /* implicit */ NodeOrString(StringView Str) { + const char *FirstChar = Str.begin(); + const char *SecondChar = Str.end(); + if (SecondChar == nullptr) { + assert(FirstChar == SecondChar); + ++FirstChar, ++SecondChar; + } + First = static_cast<const void *>(FirstChar); + Second = static_cast<const void *>(SecondChar); + } + + /* implicit */ NodeOrString(Node *N) + : First(static_cast<const void *>(N)), Second(nullptr) {} + NodeOrString() : First(nullptr), Second(nullptr) {} + + bool isString() const { return Second && First; } + bool isNode() const { return First && !Second; } + bool isEmpty() const { return !First && !Second; } + + StringView asString() const { + assert(isString()); + return StringView(static_cast<const char *>(First), + static_cast<const char *>(Second)); + } + + const Node *asNode() const { + assert(isNode()); + return static_cast<const Node *>(First); + } +}; + +class ArrayType final : public Node { + const Node *Base; + NodeOrString Dimension; + +public: + ArrayType(const Node *Base_, NodeOrString Dimension_) + : Node(KArrayType, + /*RHSComponentCache=*/Cache::Yes, + /*ArrayCache=*/Cache::Yes), + Base(Base_), Dimension(Dimension_) {} + + template<typename Fn> void match(Fn F) const { F(Base, Dimension); } + + bool hasRHSComponentSlow(OutputStream &) const override { return true; } + bool hasArraySlow(OutputStream &) const override { return true; } + + void printLeft(OutputStream &S) const override { Base->printLeft(S); } + + void printRight(OutputStream &S) const override { + if (S.back() != ']') + S += " "; + S += "["; + if (Dimension.isString()) + S += Dimension.asString(); + else if (Dimension.isNode()) + Dimension.asNode()->print(S); + S += "]"; + Base->printRight(S); + } +}; + +class FunctionType final : public Node { + const Node *Ret; + NodeArray Params; + Qualifiers CVQuals; + FunctionRefQual RefQual; + const Node *ExceptionSpec; + +public: + FunctionType(const Node *Ret_, NodeArray Params_, Qualifiers CVQuals_, + FunctionRefQual RefQual_, const Node *ExceptionSpec_) + : Node(KFunctionType, + /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No, + /*FunctionCache=*/Cache::Yes), + Ret(Ret_), Params(Params_), CVQuals(CVQuals_), RefQual(RefQual_), + ExceptionSpec(ExceptionSpec_) {} + + template<typename Fn> void match(Fn F) const { + F(Ret, Params, CVQuals, RefQual, ExceptionSpec); + } + + bool hasRHSComponentSlow(OutputStream &) const override { return true; } + bool hasFunctionSlow(OutputStream &) const override { return true; } + + // Handle C++'s ... quirky decl grammar by using the left & right + // distinction. Consider: + // int (*f(float))(char) {} + // f is a function that takes a float and returns a pointer to a function + // that takes a char and returns an int. If we're trying to print f, start + // by printing out the return types's left, then print our parameters, then + // finally print right of the return type. + void printLeft(OutputStream &S) const override { + Ret->printLeft(S); + S += " "; + } + + void printRight(OutputStream &S) const override { + S += "("; + Params.printWithComma(S); + S += ")"; + Ret->printRight(S); + + if (CVQuals & QualConst) + S += " const"; + if (CVQuals & QualVolatile) + S += " volatile"; + if (CVQuals & QualRestrict) + S += " restrict"; + + if (RefQual == FrefQualLValue) + S += " &"; + else if (RefQual == FrefQualRValue) + S += " &&"; + + if (ExceptionSpec != nullptr) { + S += ' '; + ExceptionSpec->print(S); + } + } +}; + +class NoexceptSpec : public Node { + const Node *E; +public: + NoexceptSpec(const Node *E_) : Node(KNoexceptSpec), E(E_) {} + + template<typename Fn> void match(Fn F) const { F(E); } + + void printLeft(OutputStream &S) const override { + S += "noexcept("; + E->print(S); + S += ")"; + } +}; + +class DynamicExceptionSpec : public Node { + NodeArray Types; +public: + DynamicExceptionSpec(NodeArray Types_) + : Node(KDynamicExceptionSpec), Types(Types_) {} + + template<typename Fn> void match(Fn F) const { F(Types); } + + void printLeft(OutputStream &S) const override { + S += "throw("; + Types.printWithComma(S); + S += ')'; + } +}; + +class FunctionEncoding final : public Node { + const Node *Ret; + const Node *Name; + NodeArray Params; + const Node *Attrs; + Qualifiers CVQuals; + FunctionRefQual RefQual; + +public: + FunctionEncoding(const Node *Ret_, const Node *Name_, NodeArray Params_, + const Node *Attrs_, Qualifiers CVQuals_, + FunctionRefQual RefQual_) + : Node(KFunctionEncoding, + /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No, + /*FunctionCache=*/Cache::Yes), + Ret(Ret_), Name(Name_), Params(Params_), Attrs(Attrs_), + CVQuals(CVQuals_), RefQual(RefQual_) {} + + template<typename Fn> void match(Fn F) const { + F(Ret, Name, Params, Attrs, CVQuals, RefQual); + } + + Qualifiers getCVQuals() const { return CVQuals; } + FunctionRefQual getRefQual() const { return RefQual; } + NodeArray getParams() const { return Params; } + const Node *getReturnType() const { return Ret; } + + bool hasRHSComponentSlow(OutputStream &) const override { return true; } + bool hasFunctionSlow(OutputStream &) const override { return true; } + + const Node *getName() const { return Name; } + + void printLeft(OutputStream &S) const override { + if (Ret) { + Ret->printLeft(S); + if (!Ret->hasRHSComponent(S)) + S += " "; + } + Name->print(S); + } + + void printRight(OutputStream &S) const override { + S += "("; + Params.printWithComma(S); + S += ")"; + if (Ret) + Ret->printRight(S); + + if (CVQuals & QualConst) + S += " const"; + if (CVQuals & QualVolatile) + S += " volatile"; + if (CVQuals & QualRestrict) + S += " restrict"; + + if (RefQual == FrefQualLValue) + S += " &"; + else if (RefQual == FrefQualRValue) + S += " &&"; + + if (Attrs != nullptr) + Attrs->print(S); + } +}; + +class LiteralOperator : public Node { + const Node *OpName; + +public: + LiteralOperator(const Node *OpName_) + : Node(KLiteralOperator), OpName(OpName_) {} + + template<typename Fn> void match(Fn F) const { F(OpName); } + + void printLeft(OutputStream &S) const override { + S += "operator\"\" "; + OpName->print(S); + } +}; + +class SpecialName final : public Node { + const StringView Special; + const Node *Child; + +public: + SpecialName(StringView Special_, const Node *Child_) + : Node(KSpecialName), Special(Special_), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Special, Child); } + + void printLeft(OutputStream &S) const override { + S += Special; + Child->print(S); + } +}; + +class CtorVtableSpecialName final : public Node { + const Node *FirstType; + const Node *SecondType; + +public: + CtorVtableSpecialName(const Node *FirstType_, const Node *SecondType_) + : Node(KCtorVtableSpecialName), + FirstType(FirstType_), SecondType(SecondType_) {} + + template<typename Fn> void match(Fn F) const { F(FirstType, SecondType); } + + void printLeft(OutputStream &S) const override { + S += "construction vtable for "; + FirstType->print(S); + S += "-in-"; + SecondType->print(S); + } +}; + +struct NestedName : Node { + Node *Qual; + Node *Name; + + NestedName(Node *Qual_, Node *Name_) + : Node(KNestedName), Qual(Qual_), Name(Name_) {} + + template<typename Fn> void match(Fn F) const { F(Qual, Name); } + + StringView getBaseName() const override { return Name->getBaseName(); } + + void printLeft(OutputStream &S) const override { + Qual->print(S); + S += "::"; + Name->print(S); + } +}; + +struct LocalName : Node { + Node *Encoding; + Node *Entity; + + LocalName(Node *Encoding_, Node *Entity_) + : Node(KLocalName), Encoding(Encoding_), Entity(Entity_) {} + + template<typename Fn> void match(Fn F) const { F(Encoding, Entity); } + + void printLeft(OutputStream &S) const override { + Encoding->print(S); + S += "::"; + Entity->print(S); + } +}; + +class QualifiedName final : public Node { + // qualifier::name + const Node *Qualifier; + const Node *Name; + +public: + QualifiedName(const Node *Qualifier_, const Node *Name_) + : Node(KQualifiedName), Qualifier(Qualifier_), Name(Name_) {} + + template<typename Fn> void match(Fn F) const { F(Qualifier, Name); } + + StringView getBaseName() const override { return Name->getBaseName(); } + + void printLeft(OutputStream &S) const override { + Qualifier->print(S); + S += "::"; + Name->print(S); + } +}; + +class VectorType final : public Node { + const Node *BaseType; + const NodeOrString Dimension; + +public: + VectorType(const Node *BaseType_, NodeOrString Dimension_) + : Node(KVectorType), BaseType(BaseType_), + Dimension(Dimension_) {} + + template<typename Fn> void match(Fn F) const { F(BaseType, Dimension); } + + void printLeft(OutputStream &S) const override { + BaseType->print(S); + S += " vector["; + if (Dimension.isNode()) + Dimension.asNode()->print(S); + else if (Dimension.isString()) + S += Dimension.asString(); + S += "]"; + } +}; + +class PixelVectorType final : public Node { + const NodeOrString Dimension; + +public: + PixelVectorType(NodeOrString Dimension_) + : Node(KPixelVectorType), Dimension(Dimension_) {} + + template<typename Fn> void match(Fn F) const { F(Dimension); } + + void printLeft(OutputStream &S) const override { + // FIXME: This should demangle as "vector pixel". + S += "pixel vector["; + S += Dimension.asString(); + S += "]"; + } +}; + +enum class TemplateParamKind { Type, NonType, Template }; + +/// An invented name for a template parameter for which we don't have a +/// corresponding template argument. +/// +/// This node is created when parsing the <lambda-sig> for a lambda with +/// explicit template arguments, which might be referenced in the parameter +/// types appearing later in the <lambda-sig>. +class SyntheticTemplateParamName final : public Node { + TemplateParamKind Kind; + unsigned Index; + +public: + SyntheticTemplateParamName(TemplateParamKind Kind_, unsigned Index_) + : Node(KSyntheticTemplateParamName), Kind(Kind_), Index(Index_) {} + + template<typename Fn> void match(Fn F) const { F(Kind, Index); } + + void printLeft(OutputStream &S) const override { + switch (Kind) { + case TemplateParamKind::Type: + S += "$T"; + break; + case TemplateParamKind::NonType: + S += "$N"; + break; + case TemplateParamKind::Template: + S += "$TT"; + break; + } + if (Index > 0) + S << Index - 1; + } +}; + +/// A template type parameter declaration, 'typename T'. +class TypeTemplateParamDecl final : public Node { + Node *Name; + +public: + TypeTemplateParamDecl(Node *Name_) + : Node(KTypeTemplateParamDecl, Cache::Yes), Name(Name_) {} + + template<typename Fn> void match(Fn F) const { F(Name); } + + void printLeft(OutputStream &S) const override { + S += "typename "; + } + + void printRight(OutputStream &S) const override { + Name->print(S); + } +}; + +/// A non-type template parameter declaration, 'int N'. +class NonTypeTemplateParamDecl final : public Node { + Node *Name; + Node *Type; + +public: + NonTypeTemplateParamDecl(Node *Name_, Node *Type_) + : Node(KNonTypeTemplateParamDecl, Cache::Yes), Name(Name_), Type(Type_) {} + + template<typename Fn> void match(Fn F) const { F(Name, Type); } + + void printLeft(OutputStream &S) const override { + Type->printLeft(S); + if (!Type->hasRHSComponent(S)) + S += " "; + } + + void printRight(OutputStream &S) const override { + Name->print(S); + Type->printRight(S); + } +}; + +/// A template template parameter declaration, +/// 'template<typename T> typename N'. +class TemplateTemplateParamDecl final : public Node { + Node *Name; + NodeArray Params; + +public: + TemplateTemplateParamDecl(Node *Name_, NodeArray Params_) + : Node(KTemplateTemplateParamDecl, Cache::Yes), Name(Name_), + Params(Params_) {} + + template<typename Fn> void match(Fn F) const { F(Name, Params); } + + void printLeft(OutputStream &S) const override { + S += "template<"; + Params.printWithComma(S); + S += "> typename "; + } + + void printRight(OutputStream &S) const override { + Name->print(S); + } +}; + +/// A template parameter pack declaration, 'typename ...T'. +class TemplateParamPackDecl final : public Node { + Node *Param; + +public: + TemplateParamPackDecl(Node *Param_) + : Node(KTemplateParamPackDecl, Cache::Yes), Param(Param_) {} + + template<typename Fn> void match(Fn F) const { F(Param); } + + void printLeft(OutputStream &S) const override { + Param->printLeft(S); + S += "..."; + } + + void printRight(OutputStream &S) const override { + Param->printRight(S); + } +}; + +/// An unexpanded parameter pack (either in the expression or type context). If +/// this AST is correct, this node will have a ParameterPackExpansion node above +/// it. +/// +/// This node is created when some <template-args> are found that apply to an +/// <encoding>, and is stored in the TemplateParams table. In order for this to +/// appear in the final AST, it has to referenced via a <template-param> (ie, +/// T_). +class ParameterPack final : public Node { + NodeArray Data; + + // Setup OutputStream for a pack expansion unless we're already expanding one. + void initializePackExpansion(OutputStream &S) const { + if (S.CurrentPackMax == std::numeric_limits<unsigned>::max()) { + S.CurrentPackMax = static_cast<unsigned>(Data.size()); + S.CurrentPackIndex = 0; + } + } + +public: + ParameterPack(NodeArray Data_) : Node(KParameterPack), Data(Data_) { + ArrayCache = FunctionCache = RHSComponentCache = Cache::Unknown; + if (std::all_of(Data.begin(), Data.end(), [](Node* P) { + return P->ArrayCache == Cache::No; + })) + ArrayCache = Cache::No; + if (std::all_of(Data.begin(), Data.end(), [](Node* P) { + return P->FunctionCache == Cache::No; + })) + FunctionCache = Cache::No; + if (std::all_of(Data.begin(), Data.end(), [](Node* P) { + return P->RHSComponentCache == Cache::No; + })) + RHSComponentCache = Cache::No; + } + + template<typename Fn> void match(Fn F) const { F(Data); } + + bool hasRHSComponentSlow(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + return Idx < Data.size() && Data[Idx]->hasRHSComponent(S); + } + bool hasArraySlow(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + return Idx < Data.size() && Data[Idx]->hasArray(S); + } + bool hasFunctionSlow(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + return Idx < Data.size() && Data[Idx]->hasFunction(S); + } + const Node *getSyntaxNode(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + return Idx < Data.size() ? Data[Idx]->getSyntaxNode(S) : this; + } + + void printLeft(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + if (Idx < Data.size()) + Data[Idx]->printLeft(S); + } + void printRight(OutputStream &S) const override { + initializePackExpansion(S); + size_t Idx = S.CurrentPackIndex; + if (Idx < Data.size()) + Data[Idx]->printRight(S); + } +}; + +/// A variadic template argument. This node represents an occurrence of +/// J<something>E in some <template-args>. It isn't itself unexpanded, unless +/// one of it's Elements is. The parser inserts a ParameterPack into the +/// TemplateParams table if the <template-args> this pack belongs to apply to an +/// <encoding>. +class TemplateArgumentPack final : public Node { + NodeArray Elements; +public: + TemplateArgumentPack(NodeArray Elements_) + : Node(KTemplateArgumentPack), Elements(Elements_) {} + + template<typename Fn> void match(Fn F) const { F(Elements); } + + NodeArray getElements() const { return Elements; } + + void printLeft(OutputStream &S) const override { + Elements.printWithComma(S); + } +}; + +/// A pack expansion. Below this node, there are some unexpanded ParameterPacks +/// which each have Child->ParameterPackSize elements. +class ParameterPackExpansion final : public Node { + const Node *Child; + +public: + ParameterPackExpansion(const Node *Child_) + : Node(KParameterPackExpansion), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Child); } + + const Node *getChild() const { return Child; } + + void printLeft(OutputStream &S) const override { + constexpr unsigned Max = std::numeric_limits<unsigned>::max(); + SwapAndRestore<unsigned> SavePackIdx(S.CurrentPackIndex, Max); + SwapAndRestore<unsigned> SavePackMax(S.CurrentPackMax, Max); + size_t StreamPos = S.getCurrentPosition(); + + // Print the first element in the pack. If Child contains a ParameterPack, + // it will set up S.CurrentPackMax and print the first element. + Child->print(S); + + // No ParameterPack was found in Child. This can occur if we've found a pack + // expansion on a <function-param>. + if (S.CurrentPackMax == Max) { + S += "..."; + return; + } + + // We found a ParameterPack, but it has no elements. Erase whatever we may + // of printed. + if (S.CurrentPackMax == 0) { + S.setCurrentPosition(StreamPos); + return; + } + + // Else, iterate through the rest of the elements in the pack. + for (unsigned I = 1, E = S.CurrentPackMax; I < E; ++I) { + S += ", "; + S.CurrentPackIndex = I; + Child->print(S); + } + } +}; + +class TemplateArgs final : public Node { + NodeArray Params; + +public: + TemplateArgs(NodeArray Params_) : Node(KTemplateArgs), Params(Params_) {} + + template<typename Fn> void match(Fn F) const { F(Params); } + + NodeArray getParams() { return Params; } + + void printLeft(OutputStream &S) const override { + S += "<"; + Params.printWithComma(S); + if (S.back() == '>') + S += " "; + S += ">"; + } +}; + +/// A forward-reference to a template argument that was not known at the point +/// where the template parameter name was parsed in a mangling. +/// +/// This is created when demangling the name of a specialization of a +/// conversion function template: +/// +/// \code +/// struct A { +/// template<typename T> operator T*(); +/// }; +/// \endcode +/// +/// When demangling a specialization of the conversion function template, we +/// encounter the name of the template (including the \c T) before we reach +/// the template argument list, so we cannot substitute the parameter name +/// for the corresponding argument while parsing. Instead, we create a +/// \c ForwardTemplateReference node that is resolved after we parse the +/// template arguments. +struct ForwardTemplateReference : Node { + size_t Index; + Node *Ref = nullptr; + + // If we're currently printing this node. It is possible (though invalid) for + // a forward template reference to refer to itself via a substitution. This + // creates a cyclic AST, which will stack overflow printing. To fix this, bail + // out if more than one print* function is active. + mutable bool Printing = false; + + ForwardTemplateReference(size_t Index_) + : Node(KForwardTemplateReference, Cache::Unknown, Cache::Unknown, + Cache::Unknown), + Index(Index_) {} + + // We don't provide a matcher for these, because the value of the node is + // not determined by its construction parameters, and it generally needs + // special handling. + template<typename Fn> void match(Fn F) const = delete; + + bool hasRHSComponentSlow(OutputStream &S) const override { + if (Printing) + return false; + SwapAndRestore<bool> SavePrinting(Printing, true); + return Ref->hasRHSComponent(S); + } + bool hasArraySlow(OutputStream &S) const override { + if (Printing) + return false; + SwapAndRestore<bool> SavePrinting(Printing, true); + return Ref->hasArray(S); + } + bool hasFunctionSlow(OutputStream &S) const override { + if (Printing) + return false; + SwapAndRestore<bool> SavePrinting(Printing, true); + return Ref->hasFunction(S); + } + const Node *getSyntaxNode(OutputStream &S) const override { + if (Printing) + return this; + SwapAndRestore<bool> SavePrinting(Printing, true); + return Ref->getSyntaxNode(S); + } + + void printLeft(OutputStream &S) const override { + if (Printing) + return; + SwapAndRestore<bool> SavePrinting(Printing, true); + Ref->printLeft(S); + } + void printRight(OutputStream &S) const override { + if (Printing) + return; + SwapAndRestore<bool> SavePrinting(Printing, true); + Ref->printRight(S); + } +}; + +struct NameWithTemplateArgs : Node { + // name<template_args> + Node *Name; + Node *TemplateArgs; + + NameWithTemplateArgs(Node *Name_, Node *TemplateArgs_) + : Node(KNameWithTemplateArgs), Name(Name_), TemplateArgs(TemplateArgs_) {} + + template<typename Fn> void match(Fn F) const { F(Name, TemplateArgs); } + + StringView getBaseName() const override { return Name->getBaseName(); } + + void printLeft(OutputStream &S) const override { + Name->print(S); + TemplateArgs->print(S); + } +}; + +class GlobalQualifiedName final : public Node { + Node *Child; + +public: + GlobalQualifiedName(Node* Child_) + : Node(KGlobalQualifiedName), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Child); } + + StringView getBaseName() const override { return Child->getBaseName(); } + + void printLeft(OutputStream &S) const override { + S += "::"; + Child->print(S); + } +}; + +struct StdQualifiedName : Node { + Node *Child; + + StdQualifiedName(Node *Child_) : Node(KStdQualifiedName), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Child); } + + StringView getBaseName() const override { return Child->getBaseName(); } + + void printLeft(OutputStream &S) const override { + S += "std::"; + Child->print(S); + } +}; + +enum class SpecialSubKind { + allocator, + basic_string, + string, + istream, + ostream, + iostream, +}; + +class ExpandedSpecialSubstitution final : public Node { + SpecialSubKind SSK; + +public: + ExpandedSpecialSubstitution(SpecialSubKind SSK_) + : Node(KExpandedSpecialSubstitution), SSK(SSK_) {} + + template<typename Fn> void match(Fn F) const { F(SSK); } + + StringView getBaseName() const override { + switch (SSK) { + case SpecialSubKind::allocator: + return StringView("allocator"); + case SpecialSubKind::basic_string: + return StringView("basic_string"); + case SpecialSubKind::string: + return StringView("basic_string"); + case SpecialSubKind::istream: + return StringView("basic_istream"); + case SpecialSubKind::ostream: + return StringView("basic_ostream"); + case SpecialSubKind::iostream: + return StringView("basic_iostream"); + } + DEMANGLE_UNREACHABLE; + } + + void printLeft(OutputStream &S) const override { + switch (SSK) { + case SpecialSubKind::allocator: + S += "std::allocator"; + break; + case SpecialSubKind::basic_string: + S += "std::basic_string"; + break; + case SpecialSubKind::string: + S += "std::basic_string<char, std::char_traits<char>, " + "std::allocator<char> >"; + break; + case SpecialSubKind::istream: + S += "std::basic_istream<char, std::char_traits<char> >"; + break; + case SpecialSubKind::ostream: + S += "std::basic_ostream<char, std::char_traits<char> >"; + break; + case SpecialSubKind::iostream: + S += "std::basic_iostream<char, std::char_traits<char> >"; + break; + } + } +}; + +class SpecialSubstitution final : public Node { +public: + SpecialSubKind SSK; + + SpecialSubstitution(SpecialSubKind SSK_) + : Node(KSpecialSubstitution), SSK(SSK_) {} + + template<typename Fn> void match(Fn F) const { F(SSK); } + + StringView getBaseName() const override { + switch (SSK) { + case SpecialSubKind::allocator: + return StringView("allocator"); + case SpecialSubKind::basic_string: + return StringView("basic_string"); + case SpecialSubKind::string: + return StringView("string"); + case SpecialSubKind::istream: + return StringView("istream"); + case SpecialSubKind::ostream: + return StringView("ostream"); + case SpecialSubKind::iostream: + return StringView("iostream"); + } + DEMANGLE_UNREACHABLE; + } + + void printLeft(OutputStream &S) const override { + switch (SSK) { + case SpecialSubKind::allocator: + S += "std::allocator"; + break; + case SpecialSubKind::basic_string: + S += "std::basic_string"; + break; + case SpecialSubKind::string: + S += "std::string"; + break; + case SpecialSubKind::istream: + S += "std::istream"; + break; + case SpecialSubKind::ostream: + S += "std::ostream"; + break; + case SpecialSubKind::iostream: + S += "std::iostream"; + break; + } + } +}; + +class CtorDtorName final : public Node { + const Node *Basename; + const bool IsDtor; + const int Variant; + +public: + CtorDtorName(const Node *Basename_, bool IsDtor_, int Variant_) + : Node(KCtorDtorName), Basename(Basename_), IsDtor(IsDtor_), + Variant(Variant_) {} + + template<typename Fn> void match(Fn F) const { F(Basename, IsDtor, Variant); } + + void printLeft(OutputStream &S) const override { + if (IsDtor) + S += "~"; + S += Basename->getBaseName(); + } +}; + +class DtorName : public Node { + const Node *Base; + +public: + DtorName(const Node *Base_) : Node(KDtorName), Base(Base_) {} + + template<typename Fn> void match(Fn F) const { F(Base); } + + void printLeft(OutputStream &S) const override { + S += "~"; + Base->printLeft(S); + } +}; + +class UnnamedTypeName : public Node { + const StringView Count; + +public: + UnnamedTypeName(StringView Count_) : Node(KUnnamedTypeName), Count(Count_) {} + + template<typename Fn> void match(Fn F) const { F(Count); } + + void printLeft(OutputStream &S) const override { + S += "'unnamed"; + S += Count; + S += "\'"; + } +}; + +class ClosureTypeName : public Node { + NodeArray TemplateParams; + NodeArray Params; + StringView Count; + +public: + ClosureTypeName(NodeArray TemplateParams_, NodeArray Params_, + StringView Count_) + : Node(KClosureTypeName), TemplateParams(TemplateParams_), + Params(Params_), Count(Count_) {} + + template<typename Fn> void match(Fn F) const { + F(TemplateParams, Params, Count); + } + + void printDeclarator(OutputStream &S) const { + if (!TemplateParams.empty()) { + S += "<"; + TemplateParams.printWithComma(S); + S += ">"; + } + S += "("; + Params.printWithComma(S); + S += ")"; + } + + void printLeft(OutputStream &S) const override { + S += "\'lambda"; + S += Count; + S += "\'"; + printDeclarator(S); + } +}; + +class StructuredBindingName : public Node { + NodeArray Bindings; +public: + StructuredBindingName(NodeArray Bindings_) + : Node(KStructuredBindingName), Bindings(Bindings_) {} + + template<typename Fn> void match(Fn F) const { F(Bindings); } + + void printLeft(OutputStream &S) const override { + S += '['; + Bindings.printWithComma(S); + S += ']'; + } +}; + +// -- Expression Nodes -- + +class BinaryExpr : public Node { + const Node *LHS; + const StringView InfixOperator; + const Node *RHS; + +public: + BinaryExpr(const Node *LHS_, StringView InfixOperator_, const Node *RHS_) + : Node(KBinaryExpr), LHS(LHS_), InfixOperator(InfixOperator_), RHS(RHS_) { + } + + template<typename Fn> void match(Fn F) const { F(LHS, InfixOperator, RHS); } + + void printLeft(OutputStream &S) const override { + // might be a template argument expression, then we need to disambiguate + // with parens. + if (InfixOperator == ">") + S += "("; + + S += "("; + LHS->print(S); + S += ") "; + S += InfixOperator; + S += " ("; + RHS->print(S); + S += ")"; + + if (InfixOperator == ">") + S += ")"; + } +}; + +class ArraySubscriptExpr : public Node { + const Node *Op1; + const Node *Op2; + +public: + ArraySubscriptExpr(const Node *Op1_, const Node *Op2_) + : Node(KArraySubscriptExpr), Op1(Op1_), Op2(Op2_) {} + + template<typename Fn> void match(Fn F) const { F(Op1, Op2); } + + void printLeft(OutputStream &S) const override { + S += "("; + Op1->print(S); + S += ")["; + Op2->print(S); + S += "]"; + } +}; + +class PostfixExpr : public Node { + const Node *Child; + const StringView Operator; + +public: + PostfixExpr(const Node *Child_, StringView Operator_) + : Node(KPostfixExpr), Child(Child_), Operator(Operator_) {} + + template<typename Fn> void match(Fn F) const { F(Child, Operator); } + + void printLeft(OutputStream &S) const override { + S += "("; + Child->print(S); + S += ")"; + S += Operator; + } +}; + +class ConditionalExpr : public Node { + const Node *Cond; + const Node *Then; + const Node *Else; + +public: + ConditionalExpr(const Node *Cond_, const Node *Then_, const Node *Else_) + : Node(KConditionalExpr), Cond(Cond_), Then(Then_), Else(Else_) {} + + template<typename Fn> void match(Fn F) const { F(Cond, Then, Else); } + + void printLeft(OutputStream &S) const override { + S += "("; + Cond->print(S); + S += ") ? ("; + Then->print(S); + S += ") : ("; + Else->print(S); + S += ")"; + } +}; + +class MemberExpr : public Node { + const Node *LHS; + const StringView Kind; + const Node *RHS; + +public: + MemberExpr(const Node *LHS_, StringView Kind_, const Node *RHS_) + : Node(KMemberExpr), LHS(LHS_), Kind(Kind_), RHS(RHS_) {} + + template<typename Fn> void match(Fn F) const { F(LHS, Kind, RHS); } + + void printLeft(OutputStream &S) const override { + LHS->print(S); + S += Kind; + RHS->print(S); + } +}; + +class EnclosingExpr : public Node { + const StringView Prefix; + const Node *Infix; + const StringView Postfix; + +public: + EnclosingExpr(StringView Prefix_, Node *Infix_, StringView Postfix_) + : Node(KEnclosingExpr), Prefix(Prefix_), Infix(Infix_), + Postfix(Postfix_) {} + + template<typename Fn> void match(Fn F) const { F(Prefix, Infix, Postfix); } + + void printLeft(OutputStream &S) const override { + S += Prefix; + Infix->print(S); + S += Postfix; + } +}; + +class CastExpr : public Node { + // cast_kind<to>(from) + const StringView CastKind; + const Node *To; + const Node *From; + +public: + CastExpr(StringView CastKind_, const Node *To_, const Node *From_) + : Node(KCastExpr), CastKind(CastKind_), To(To_), From(From_) {} + + template<typename Fn> void match(Fn F) const { F(CastKind, To, From); } + + void printLeft(OutputStream &S) const override { + S += CastKind; + S += "<"; + To->printLeft(S); + S += ">("; + From->printLeft(S); + S += ")"; + } +}; + +class SizeofParamPackExpr : public Node { + const Node *Pack; + +public: + SizeofParamPackExpr(const Node *Pack_) + : Node(KSizeofParamPackExpr), Pack(Pack_) {} + + template<typename Fn> void match(Fn F) const { F(Pack); } + + void printLeft(OutputStream &S) const override { + S += "sizeof...("; + ParameterPackExpansion PPE(Pack); + PPE.printLeft(S); + S += ")"; + } +}; + +class CallExpr : public Node { + const Node *Callee; + NodeArray Args; + +public: + CallExpr(const Node *Callee_, NodeArray Args_) + : Node(KCallExpr), Callee(Callee_), Args(Args_) {} + + template<typename Fn> void match(Fn F) const { F(Callee, Args); } + + void printLeft(OutputStream &S) const override { + Callee->print(S); + S += "("; + Args.printWithComma(S); + S += ")"; + } +}; + +class NewExpr : public Node { + // new (expr_list) type(init_list) + NodeArray ExprList; + Node *Type; + NodeArray InitList; + bool IsGlobal; // ::operator new ? + bool IsArray; // new[] ? +public: + NewExpr(NodeArray ExprList_, Node *Type_, NodeArray InitList_, bool IsGlobal_, + bool IsArray_) + : Node(KNewExpr), ExprList(ExprList_), Type(Type_), InitList(InitList_), + IsGlobal(IsGlobal_), IsArray(IsArray_) {} + + template<typename Fn> void match(Fn F) const { + F(ExprList, Type, InitList, IsGlobal, IsArray); + } + + void printLeft(OutputStream &S) const override { + if (IsGlobal) + S += "::operator "; + S += "new"; + if (IsArray) + S += "[]"; + S += ' '; + if (!ExprList.empty()) { + S += "("; + ExprList.printWithComma(S); + S += ")"; + } + Type->print(S); + if (!InitList.empty()) { + S += "("; + InitList.printWithComma(S); + S += ")"; + } + + } +}; + +class DeleteExpr : public Node { + Node *Op; + bool IsGlobal; + bool IsArray; + +public: + DeleteExpr(Node *Op_, bool IsGlobal_, bool IsArray_) + : Node(KDeleteExpr), Op(Op_), IsGlobal(IsGlobal_), IsArray(IsArray_) {} + + template<typename Fn> void match(Fn F) const { F(Op, IsGlobal, IsArray); } + + void printLeft(OutputStream &S) const override { + if (IsGlobal) + S += "::"; + S += "delete"; + if (IsArray) + S += "[] "; + Op->print(S); + } +}; + +class PrefixExpr : public Node { + StringView Prefix; + Node *Child; + +public: + PrefixExpr(StringView Prefix_, Node *Child_) + : Node(KPrefixExpr), Prefix(Prefix_), Child(Child_) {} + + template<typename Fn> void match(Fn F) const { F(Prefix, Child); } + + void printLeft(OutputStream &S) const override { + S += Prefix; + S += "("; + Child->print(S); + S += ")"; + } +}; + +class FunctionParam : public Node { + StringView Number; + +public: + FunctionParam(StringView Number_) : Node(KFunctionParam), Number(Number_) {} + + template<typename Fn> void match(Fn F) const { F(Number); } + + void printLeft(OutputStream &S) const override { + S += "fp"; + S += Number; + } +}; + +class ConversionExpr : public Node { + const Node *Type; + NodeArray Expressions; + +public: + ConversionExpr(const Node *Type_, NodeArray Expressions_) + : Node(KConversionExpr), Type(Type_), Expressions(Expressions_) {} + + template<typename Fn> void match(Fn F) const { F(Type, Expressions); } + + void printLeft(OutputStream &S) const override { + S += "("; + Type->print(S); + S += ")("; + Expressions.printWithComma(S); + S += ")"; + } +}; + +class InitListExpr : public Node { + const Node *Ty; + NodeArray Inits; +public: + InitListExpr(const Node *Ty_, NodeArray Inits_) + : Node(KInitListExpr), Ty(Ty_), Inits(Inits_) {} + + template<typename Fn> void match(Fn F) const { F(Ty, Inits); } + + void printLeft(OutputStream &S) const override { + if (Ty) + Ty->print(S); + S += '{'; + Inits.printWithComma(S); + S += '}'; + } +}; + +class BracedExpr : public Node { + const Node *Elem; + const Node *Init; + bool IsArray; +public: + BracedExpr(const Node *Elem_, const Node *Init_, bool IsArray_) + : Node(KBracedExpr), Elem(Elem_), Init(Init_), IsArray(IsArray_) {} + + template<typename Fn> void match(Fn F) const { F(Elem, Init, IsArray); } + + void printLeft(OutputStream &S) const override { + if (IsArray) { + S += '['; + Elem->print(S); + S += ']'; + } else { + S += '.'; + Elem->print(S); + } + if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr) + S += " = "; + Init->print(S); + } +}; + +class BracedRangeExpr : public Node { + const Node *First; + const Node *Last; + const Node *Init; +public: + BracedRangeExpr(const Node *First_, const Node *Last_, const Node *Init_) + : Node(KBracedRangeExpr), First(First_), Last(Last_), Init(Init_) {} + + template<typename Fn> void match(Fn F) const { F(First, Last, Init); } + + void printLeft(OutputStream &S) const override { + S += '['; + First->print(S); + S += " ... "; + Last->print(S); + S += ']'; + if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr) + S += " = "; + Init->print(S); + } +}; + +class FoldExpr : public Node { + const Node *Pack, *Init; + StringView OperatorName; + bool IsLeftFold; + +public: + FoldExpr(bool IsLeftFold_, StringView OperatorName_, const Node *Pack_, + const Node *Init_) + : Node(KFoldExpr), Pack(Pack_), Init(Init_), OperatorName(OperatorName_), + IsLeftFold(IsLeftFold_) {} + + template<typename Fn> void match(Fn F) const { + F(IsLeftFold, OperatorName, Pack, Init); + } + + void printLeft(OutputStream &S) const override { + auto PrintPack = [&] { + S += '('; + ParameterPackExpansion(Pack).print(S); + S += ')'; + }; + + S += '('; + + if (IsLeftFold) { + // init op ... op pack + if (Init != nullptr) { + Init->print(S); + S += ' '; + S += OperatorName; + S += ' '; + } + // ... op pack + S += "... "; + S += OperatorName; + S += ' '; + PrintPack(); + } else { // !IsLeftFold + // pack op ... + PrintPack(); + S += ' '; + S += OperatorName; + S += " ..."; + // pack op ... op init + if (Init != nullptr) { + S += ' '; + S += OperatorName; + S += ' '; + Init->print(S); + } + } + S += ')'; + } +}; + +class ThrowExpr : public Node { + const Node *Op; + +public: + ThrowExpr(const Node *Op_) : Node(KThrowExpr), Op(Op_) {} + + template<typename Fn> void match(Fn F) const { F(Op); } + + void printLeft(OutputStream &S) const override { + S += "throw "; + Op->print(S); + } +}; + +// MSVC __uuidof extension, generated by clang in -fms-extensions mode. +class UUIDOfExpr : public Node { + Node *Operand; +public: + UUIDOfExpr(Node *Operand_) : Node(KUUIDOfExpr), Operand(Operand_) {} + + template<typename Fn> void match(Fn F) const { F(Operand); } + + void printLeft(OutputStream &S) const override { + S << "__uuidof("; + Operand->print(S); + S << ")"; + } +}; + +class BoolExpr : public Node { + bool Value; + +public: + BoolExpr(bool Value_) : Node(KBoolExpr), Value(Value_) {} + + template<typename Fn> void match(Fn F) const { F(Value); } + + void printLeft(OutputStream &S) const override { + S += Value ? StringView("true") : StringView("false"); + } +}; + +class StringLiteral : public Node { + const Node *Type; + +public: + StringLiteral(const Node *Type_) : Node(KStringLiteral), Type(Type_) {} + + template<typename Fn> void match(Fn F) const { F(Type); } + + void printLeft(OutputStream &S) const override { + S += "\"<"; + Type->print(S); + S += ">\""; + } +}; + +class LambdaExpr : public Node { + const Node *Type; + +public: + LambdaExpr(const Node *Type_) : Node(KLambdaExpr), Type(Type_) {} + + template<typename Fn> void match(Fn F) const { F(Type); } + + void printLeft(OutputStream &S) const override { + S += "[]"; + if (Type->getKind() == KClosureTypeName) + static_cast<const ClosureTypeName *>(Type)->printDeclarator(S); + S += "{...}"; + } +}; + +class IntegerCastExpr : public Node { + // ty(integer) + const Node *Ty; + StringView Integer; + +public: + IntegerCastExpr(const Node *Ty_, StringView Integer_) + : Node(KIntegerCastExpr), Ty(Ty_), Integer(Integer_) {} + + template<typename Fn> void match(Fn F) const { F(Ty, Integer); } + + void printLeft(OutputStream &S) const override { + S += "("; + Ty->print(S); + S += ")"; + S += Integer; + } +}; + +class IntegerLiteral : public Node { + StringView Type; + StringView Value; + +public: + IntegerLiteral(StringView Type_, StringView Value_) + : Node(KIntegerLiteral), Type(Type_), Value(Value_) {} + + template<typename Fn> void match(Fn F) const { F(Type, Value); } + + void printLeft(OutputStream &S) const override { + if (Type.size() > 3) { + S += "("; + S += Type; + S += ")"; + } + + if (Value[0] == 'n') { + S += "-"; + S += Value.dropFront(1); + } else + S += Value; + + if (Type.size() <= 3) + S += Type; + } +}; + +template <class Float> struct FloatData; + +namespace float_literal_impl { +constexpr Node::Kind getFloatLiteralKind(float *) { + return Node::KFloatLiteral; +} +constexpr Node::Kind getFloatLiteralKind(double *) { + return Node::KDoubleLiteral; +} +constexpr Node::Kind getFloatLiteralKind(long double *) { + return Node::KLongDoubleLiteral; +} +} + +template <class Float> class FloatLiteralImpl : public Node { + const StringView Contents; + + static constexpr Kind KindForClass = + float_literal_impl::getFloatLiteralKind((Float *)nullptr); + +public: + FloatLiteralImpl(StringView Contents_) + : Node(KindForClass), Contents(Contents_) {} + + template<typename Fn> void match(Fn F) const { F(Contents); } + + void printLeft(OutputStream &s) const override { + const char *first = Contents.begin(); + const char *last = Contents.end() + 1; + + const size_t N = FloatData<Float>::mangled_size; + if (static_cast<std::size_t>(last - first) > N) { + last = first + N; + union { + Float value; + char buf[sizeof(Float)]; + }; + const char *t = first; + char *e = buf; + for (; t != last; ++t, ++e) { + unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0') + : static_cast<unsigned>(*t - 'a' + 10); + ++t; + unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0') + : static_cast<unsigned>(*t - 'a' + 10); + *e = static_cast<char>((d1 << 4) + d0); + } +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + std::reverse(buf, e); +#endif + char num[FloatData<Float>::max_demangled_size] = {0}; + int n = snprintf(num, sizeof(num), FloatData<Float>::spec, value); + s += StringView(num, num + n); + } + } +}; + +using FloatLiteral = FloatLiteralImpl<float>; +using DoubleLiteral = FloatLiteralImpl<double>; +using LongDoubleLiteral = FloatLiteralImpl<long double>; + +/// Visit the node. Calls \c F(P), where \c P is the node cast to the +/// appropriate derived class. +template<typename Fn> +void Node::visit(Fn F) const { + switch (K) { +#define CASE(X) case K ## X: return F(static_cast<const X*>(this)); + FOR_EACH_NODE_KIND(CASE) +#undef CASE + } + assert(0 && "unknown mangling node kind"); +} + +/// Determine the kind of a node from its type. +template<typename NodeT> struct NodeKind; +#define SPECIALIZATION(X) \ + template<> struct NodeKind<X> { \ + static constexpr Node::Kind Kind = Node::K##X; \ + static constexpr const char *name() { return #X; } \ + }; +FOR_EACH_NODE_KIND(SPECIALIZATION) +#undef SPECIALIZATION + +#undef FOR_EACH_NODE_KIND + +template <class T, size_t N> +class PODSmallVector { + static_assert(std::is_pod<T>::value, + "T is required to be a plain old data type"); + + T* First; + T* Last; + T* Cap; + T Inline[N]; + + bool isInline() const { return First == Inline; } + + void clearInline() { + First = Inline; + Last = Inline; + Cap = Inline + N; + } + + void reserve(size_t NewCap) { + size_t S = size(); + if (isInline()) { + auto* Tmp = static_cast<T*>(std::malloc(NewCap * sizeof(T))); + if (Tmp == nullptr) + std::terminate(); + std::copy(First, Last, Tmp); + First = Tmp; + } else { + First = static_cast<T*>(std::realloc(First, NewCap * sizeof(T))); + if (First == nullptr) + std::terminate(); + } + Last = First + S; + Cap = First + NewCap; + } + +public: + PODSmallVector() : First(Inline), Last(First), Cap(Inline + N) {} + + PODSmallVector(const PODSmallVector&) = delete; + PODSmallVector& operator=(const PODSmallVector&) = delete; + + PODSmallVector(PODSmallVector&& Other) : PODSmallVector() { + if (Other.isInline()) { + std::copy(Other.begin(), Other.end(), First); + Last = First + Other.size(); + Other.clear(); + return; + } + + First = Other.First; + Last = Other.Last; + Cap = Other.Cap; + Other.clearInline(); + } + + PODSmallVector& operator=(PODSmallVector&& Other) { + if (Other.isInline()) { + if (!isInline()) { + std::free(First); + clearInline(); + } + std::copy(Other.begin(), Other.end(), First); + Last = First + Other.size(); + Other.clear(); + return *this; + } + + if (isInline()) { + First = Other.First; + Last = Other.Last; + Cap = Other.Cap; + Other.clearInline(); + return *this; + } + + std::swap(First, Other.First); + std::swap(Last, Other.Last); + std::swap(Cap, Other.Cap); + Other.clear(); + return *this; + } + + void push_back(const T& Elem) { + if (Last == Cap) + reserve(size() * 2); + *Last++ = Elem; + } + + void pop_back() { + assert(Last != First && "Popping empty vector!"); + --Last; + } + + void dropBack(size_t Index) { + assert(Index <= size() && "dropBack() can't expand!"); + Last = First + Index; + } + + T* begin() { return First; } + T* end() { return Last; } + + bool empty() const { return First == Last; } + size_t size() const { return static_cast<size_t>(Last - First); } + T& back() { + assert(Last != First && "Calling back() on empty vector!"); + return *(Last - 1); + } + T& operator[](size_t Index) { + assert(Index < size() && "Invalid access!"); + return *(begin() + Index); + } + void clear() { Last = First; } + + ~PODSmallVector() { + if (!isInline()) + std::free(First); + } +}; + +template <typename Derived, typename Alloc> struct AbstractManglingParser { + const char *First; + const char *Last; + + // Name stack, this is used by the parser to hold temporary names that were + // parsed. The parser collapses multiple names into new nodes to construct + // the AST. Once the parser is finished, names.size() == 1. + PODSmallVector<Node *, 32> Names; + + // Substitution table. Itanium supports name substitutions as a means of + // compression. The string "S42_" refers to the 44nd entry (base-36) in this + // table. + PODSmallVector<Node *, 32> Subs; + + using TemplateParamList = PODSmallVector<Node *, 8>; + + class ScopedTemplateParamList { + AbstractManglingParser *Parser; + size_t OldNumTemplateParamLists; + TemplateParamList Params; + + public: + ScopedTemplateParamList(AbstractManglingParser *Parser) + : Parser(Parser), + OldNumTemplateParamLists(Parser->TemplateParams.size()) { + Parser->TemplateParams.push_back(&Params); + } + ~ScopedTemplateParamList() { + assert(Parser->TemplateParams.size() >= OldNumTemplateParamLists); + Parser->TemplateParams.dropBack(OldNumTemplateParamLists); + } + }; + + // Template parameter table. Like the above, but referenced like "T42_". + // This has a smaller size compared to Subs and Names because it can be + // stored on the stack. + TemplateParamList OuterTemplateParams; + + // Lists of template parameters indexed by template parameter depth, + // referenced like "TL2_4_". If nonempty, element 0 is always + // OuterTemplateParams; inner elements are always template parameter lists of + // lambda expressions. For a generic lambda with no explicit template + // parameter list, the corresponding parameter list pointer will be null. + PODSmallVector<TemplateParamList *, 4> TemplateParams; + + // Set of unresolved forward <template-param> references. These can occur in a + // conversion operator's type, and are resolved in the enclosing <encoding>. + PODSmallVector<ForwardTemplateReference *, 4> ForwardTemplateRefs; + + bool TryToParseTemplateArgs = true; + bool PermitForwardTemplateReferences = false; + size_t ParsingLambdaParamsAtLevel = (size_t)-1; + + unsigned NumSyntheticTemplateParameters[3] = {}; + + Alloc ASTAllocator; + + AbstractManglingParser(const char *First_, const char *Last_) + : First(First_), Last(Last_) {} + + Derived &getDerived() { return static_cast<Derived &>(*this); } + + void reset(const char *First_, const char *Last_) { + First = First_; + Last = Last_; + Names.clear(); + Subs.clear(); + TemplateParams.clear(); + ParsingLambdaParamsAtLevel = (size_t)-1; + TryToParseTemplateArgs = true; + PermitForwardTemplateReferences = false; + for (int I = 0; I != 3; ++I) + NumSyntheticTemplateParameters[I] = 0; + ASTAllocator.reset(); + } + + template <class T, class... Args> Node *make(Args &&... args) { + return ASTAllocator.template makeNode<T>(std::forward<Args>(args)...); + } + + template <class It> NodeArray makeNodeArray(It begin, It end) { + size_t sz = static_cast<size_t>(end - begin); + void *mem = ASTAllocator.allocateNodeArray(sz); + Node **data = new (mem) Node *[sz]; + std::copy(begin, end, data); + return NodeArray(data, sz); + } + + NodeArray popTrailingNodeArray(size_t FromPosition) { + assert(FromPosition <= Names.size()); + NodeArray res = + makeNodeArray(Names.begin() + (long)FromPosition, Names.end()); + Names.dropBack(FromPosition); + return res; + } + + bool consumeIf(StringView S) { + if (StringView(First, Last).startsWith(S)) { + First += S.size(); + return true; + } + return false; + } + + bool consumeIf(char C) { + if (First != Last && *First == C) { + ++First; + return true; + } + return false; + } + + char consume() { return First != Last ? *First++ : '\0'; } + + char look(unsigned Lookahead = 0) { + if (static_cast<size_t>(Last - First) <= Lookahead) + return '\0'; + return First[Lookahead]; + } + + size_t numLeft() const { return static_cast<size_t>(Last - First); } + + StringView parseNumber(bool AllowNegative = false); + Qualifiers parseCVQualifiers(); + bool parsePositiveInteger(size_t *Out); + StringView parseBareSourceName(); + + bool parseSeqId(size_t *Out); + Node *parseSubstitution(); + Node *parseTemplateParam(); + Node *parseTemplateParamDecl(); + Node *parseTemplateArgs(bool TagTemplates = false); + Node *parseTemplateArg(); + + /// Parse the <expr> production. + Node *parseExpr(); + Node *parsePrefixExpr(StringView Kind); + Node *parseBinaryExpr(StringView Kind); + Node *parseIntegerLiteral(StringView Lit); + Node *parseExprPrimary(); + template <class Float> Node *parseFloatingLiteral(); + Node *parseFunctionParam(); + Node *parseNewExpr(); + Node *parseConversionExpr(); + Node *parseBracedExpr(); + Node *parseFoldExpr(); + + /// Parse the <type> production. + Node *parseType(); + Node *parseFunctionType(); + Node *parseVectorType(); + Node *parseDecltype(); + Node *parseArrayType(); + Node *parsePointerToMemberType(); + Node *parseClassEnumType(); + Node *parseQualifiedType(); + + Node *parseEncoding(); + bool parseCallOffset(); + Node *parseSpecialName(); + + /// Holds some extra information about a <name> that is being parsed. This + /// information is only pertinent if the <name> refers to an <encoding>. + struct NameState { + bool CtorDtorConversion = false; + bool EndsWithTemplateArgs = false; + Qualifiers CVQualifiers = QualNone; + FunctionRefQual ReferenceQualifier = FrefQualNone; + size_t ForwardTemplateRefsBegin; + + NameState(AbstractManglingParser *Enclosing) + : ForwardTemplateRefsBegin(Enclosing->ForwardTemplateRefs.size()) {} + }; + + bool resolveForwardTemplateRefs(NameState &State) { + size_t I = State.ForwardTemplateRefsBegin; + size_t E = ForwardTemplateRefs.size(); + for (; I < E; ++I) { + size_t Idx = ForwardTemplateRefs[I]->Index; + if (TemplateParams.empty() || !TemplateParams[0] || + Idx >= TemplateParams[0]->size()) + return true; + ForwardTemplateRefs[I]->Ref = (*TemplateParams[0])[Idx]; + } + ForwardTemplateRefs.dropBack(State.ForwardTemplateRefsBegin); + return false; + } + + /// Parse the <name> production> + Node *parseName(NameState *State = nullptr); + Node *parseLocalName(NameState *State); + Node *parseOperatorName(NameState *State); + Node *parseUnqualifiedName(NameState *State); + Node *parseUnnamedTypeName(NameState *State); + Node *parseSourceName(NameState *State); + Node *parseUnscopedName(NameState *State); + Node *parseNestedName(NameState *State); + Node *parseCtorDtorName(Node *&SoFar, NameState *State); + + Node *parseAbiTags(Node *N); + + /// Parse the <unresolved-name> production. + Node *parseUnresolvedName(); + Node *parseSimpleId(); + Node *parseBaseUnresolvedName(); + Node *parseUnresolvedType(); + Node *parseDestructorName(); + + /// Top-level entry point into the parser. + Node *parse(); +}; + +const char* parse_discriminator(const char* first, const char* last); + +// <name> ::= <nested-name> // N +// ::= <local-name> # See Scope Encoding below // Z +// ::= <unscoped-template-name> <template-args> +// ::= <unscoped-name> +// +// <unscoped-template-name> ::= <unscoped-name> +// ::= <substitution> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseName(NameState *State) { + consumeIf('L'); // extension + + if (look() == 'N') + return getDerived().parseNestedName(State); + if (look() == 'Z') + return getDerived().parseLocalName(State); + + // ::= <unscoped-template-name> <template-args> + if (look() == 'S' && look(1) != 't') { + Node *S = getDerived().parseSubstitution(); + if (S == nullptr) + return nullptr; + if (look() != 'I') + return nullptr; + Node *TA = getDerived().parseTemplateArgs(State != nullptr); + if (TA == nullptr) + return nullptr; + if (State) State->EndsWithTemplateArgs = true; + return make<NameWithTemplateArgs>(S, TA); + } + + Node *N = getDerived().parseUnscopedName(State); + if (N == nullptr) + return nullptr; + // ::= <unscoped-template-name> <template-args> + if (look() == 'I') { + Subs.push_back(N); + Node *TA = getDerived().parseTemplateArgs(State != nullptr); + if (TA == nullptr) + return nullptr; + if (State) State->EndsWithTemplateArgs = true; + return make<NameWithTemplateArgs>(N, TA); + } + // ::= <unscoped-name> + return N; +} + +// <local-name> := Z <function encoding> E <entity name> [<discriminator>] +// := Z <function encoding> E s [<discriminator>] +// := Z <function encoding> Ed [ <parameter number> ] _ <entity name> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseLocalName(NameState *State) { + if (!consumeIf('Z')) + return nullptr; + Node *Encoding = getDerived().parseEncoding(); + if (Encoding == nullptr || !consumeIf('E')) + return nullptr; + + if (consumeIf('s')) { + First = parse_discriminator(First, Last); + auto *StringLitName = make<NameType>("string literal"); + if (!StringLitName) + return nullptr; + return make<LocalName>(Encoding, StringLitName); + } + + if (consumeIf('d')) { + parseNumber(true); + if (!consumeIf('_')) + return nullptr; + Node *N = getDerived().parseName(State); + if (N == nullptr) + return nullptr; + return make<LocalName>(Encoding, N); + } + + Node *Entity = getDerived().parseName(State); + if (Entity == nullptr) + return nullptr; + First = parse_discriminator(First, Last); + return make<LocalName>(Encoding, Entity); +} + +// <unscoped-name> ::= <unqualified-name> +// ::= St <unqualified-name> # ::std:: +// extension ::= StL<unqualified-name> +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseUnscopedName(NameState *State) { + if (consumeIf("StL") || consumeIf("St")) { + Node *R = getDerived().parseUnqualifiedName(State); + if (R == nullptr) + return nullptr; + return make<StdQualifiedName>(R); + } + return getDerived().parseUnqualifiedName(State); +} + +// <unqualified-name> ::= <operator-name> [abi-tags] +// ::= <ctor-dtor-name> +// ::= <source-name> +// ::= <unnamed-type-name> +// ::= DC <source-name>+ E # structured binding declaration +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseUnqualifiedName(NameState *State) { + // <ctor-dtor-name>s are special-cased in parseNestedName(). + Node *Result; + if (look() == 'U') + Result = getDerived().parseUnnamedTypeName(State); + else if (look() >= '1' && look() <= '9') + Result = getDerived().parseSourceName(State); + else if (consumeIf("DC")) { + size_t BindingsBegin = Names.size(); + do { + Node *Binding = getDerived().parseSourceName(State); + if (Binding == nullptr) + return nullptr; + Names.push_back(Binding); + } while (!consumeIf('E')); + Result = make<StructuredBindingName>(popTrailingNodeArray(BindingsBegin)); + } else + Result = getDerived().parseOperatorName(State); + if (Result != nullptr) + Result = getDerived().parseAbiTags(Result); + return Result; +} + +// <unnamed-type-name> ::= Ut [<nonnegative number>] _ +// ::= <closure-type-name> +// +// <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _ +// +// <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda has no parameters +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseUnnamedTypeName(NameState *State) { + // <template-params> refer to the innermost <template-args>. Clear out any + // outer args that we may have inserted into TemplateParams. + if (State != nullptr) + TemplateParams.clear(); + + if (consumeIf("Ut")) { + StringView Count = parseNumber(); + if (!consumeIf('_')) + return nullptr; + return make<UnnamedTypeName>(Count); + } + if (consumeIf("Ul")) { + SwapAndRestore<size_t> SwapParams(ParsingLambdaParamsAtLevel, + TemplateParams.size()); + ScopedTemplateParamList LambdaTemplateParams(this); + + size_t ParamsBegin = Names.size(); + while (look() == 'T' && + StringView("yptn").find(look(1)) != StringView::npos) { + Node *T = parseTemplateParamDecl(); + if (!T) + return nullptr; + Names.push_back(T); + } + NodeArray TempParams = popTrailingNodeArray(ParamsBegin); + + // FIXME: If TempParams is empty and none of the function parameters + // includes 'auto', we should remove LambdaTemplateParams from the + // TemplateParams list. Unfortunately, we don't find out whether there are + // any 'auto' parameters until too late in an example such as: + // + // template<typename T> void f( + // decltype([](decltype([]<typename T>(T v) {}), + // auto) {})) {} + // template<typename T> void f( + // decltype([](decltype([]<typename T>(T w) {}), + // int) {})) {} + // + // Here, the type of v is at level 2 but the type of w is at level 1. We + // don't find this out until we encounter the type of the next parameter. + // + // However, compilers can't actually cope with the former example in + // practice, and it's likely to be made ill-formed in future, so we don't + // need to support it here. + // + // If we encounter an 'auto' in the function parameter types, we will + // recreate a template parameter scope for it, but any intervening lambdas + // will be parsed in the 'wrong' template parameter depth. + if (TempParams.empty()) + TemplateParams.pop_back(); + + if (!consumeIf("vE")) { + do { + Node *P = getDerived().parseType(); + if (P == nullptr) + return nullptr; + Names.push_back(P); + } while (!consumeIf('E')); + } + NodeArray Params = popTrailingNodeArray(ParamsBegin); + + StringView Count = parseNumber(); + if (!consumeIf('_')) + return nullptr; + return make<ClosureTypeName>(TempParams, Params, Count); + } + if (consumeIf("Ub")) { + (void)parseNumber(); + if (!consumeIf('_')) + return nullptr; + return make<NameType>("'block-literal'"); + } + return nullptr; +} + +// <source-name> ::= <positive length number> <identifier> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseSourceName(NameState *) { + size_t Length = 0; + if (parsePositiveInteger(&Length)) + return nullptr; + if (numLeft() < Length || Length == 0) + return nullptr; + StringView Name(First, First + Length); + First += Length; + if (Name.startsWith("_GLOBAL__N")) + return make<NameType>("(anonymous namespace)"); + return make<NameType>(Name); +} + +// <operator-name> ::= aa # && +// ::= ad # & (unary) +// ::= an # & +// ::= aN # &= +// ::= aS # = +// ::= cl # () +// ::= cm # , +// ::= co # ~ +// ::= cv <type> # (cast) +// ::= da # delete[] +// ::= de # * (unary) +// ::= dl # delete +// ::= dv # / +// ::= dV # /= +// ::= eo # ^ +// ::= eO # ^= +// ::= eq # == +// ::= ge # >= +// ::= gt # > +// ::= ix # [] +// ::= le # <= +// ::= li <source-name> # operator "" +// ::= ls # << +// ::= lS # <<= +// ::= lt # < +// ::= mi # - +// ::= mI # -= +// ::= ml # * +// ::= mL # *= +// ::= mm # -- (postfix in <expression> context) +// ::= na # new[] +// ::= ne # != +// ::= ng # - (unary) +// ::= nt # ! +// ::= nw # new +// ::= oo # || +// ::= or # | +// ::= oR # |= +// ::= pm # ->* +// ::= pl # + +// ::= pL # += +// ::= pp # ++ (postfix in <expression> context) +// ::= ps # + (unary) +// ::= pt # -> +// ::= qu # ? +// ::= rm # % +// ::= rM # %= +// ::= rs # >> +// ::= rS # >>= +// ::= ss # <=> C++2a +// ::= v <digit> <source-name> # vendor extended operator +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseOperatorName(NameState *State) { + switch (look()) { + case 'a': + switch (look(1)) { + case 'a': + First += 2; + return make<NameType>("operator&&"); + case 'd': + case 'n': + First += 2; + return make<NameType>("operator&"); + case 'N': + First += 2; + return make<NameType>("operator&="); + case 'S': + First += 2; + return make<NameType>("operator="); + } + return nullptr; + case 'c': + switch (look(1)) { + case 'l': + First += 2; + return make<NameType>("operator()"); + case 'm': + First += 2; + return make<NameType>("operator,"); + case 'o': + First += 2; + return make<NameType>("operator~"); + // ::= cv <type> # (cast) + case 'v': { + First += 2; + SwapAndRestore<bool> SaveTemplate(TryToParseTemplateArgs, false); + // If we're parsing an encoding, State != nullptr and the conversion + // operators' <type> could have a <template-param> that refers to some + // <template-arg>s further ahead in the mangled name. + SwapAndRestore<bool> SavePermit(PermitForwardTemplateReferences, + PermitForwardTemplateReferences || + State != nullptr); + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + if (State) State->CtorDtorConversion = true; + return make<ConversionOperatorType>(Ty); + } + } + return nullptr; + case 'd': + switch (look(1)) { + case 'a': + First += 2; + return make<NameType>("operator delete[]"); + case 'e': + First += 2; + return make<NameType>("operator*"); + case 'l': + First += 2; + return make<NameType>("operator delete"); + case 'v': + First += 2; + return make<NameType>("operator/"); + case 'V': + First += 2; + return make<NameType>("operator/="); + } + return nullptr; + case 'e': + switch (look(1)) { + case 'o': + First += 2; + return make<NameType>("operator^"); + case 'O': + First += 2; + return make<NameType>("operator^="); + case 'q': + First += 2; + return make<NameType>("operator=="); + } + return nullptr; + case 'g': + switch (look(1)) { + case 'e': + First += 2; + return make<NameType>("operator>="); + case 't': + First += 2; + return make<NameType>("operator>"); + } + return nullptr; + case 'i': + if (look(1) == 'x') { + First += 2; + return make<NameType>("operator[]"); + } + return nullptr; + case 'l': + switch (look(1)) { + case 'e': + First += 2; + return make<NameType>("operator<="); + // ::= li <source-name> # operator "" + case 'i': { + First += 2; + Node *SN = getDerived().parseSourceName(State); + if (SN == nullptr) + return nullptr; + return make<LiteralOperator>(SN); + } + case 's': + First += 2; + return make<NameType>("operator<<"); + case 'S': + First += 2; + return make<NameType>("operator<<="); + case 't': + First += 2; + return make<NameType>("operator<"); + } + return nullptr; + case 'm': + switch (look(1)) { + case 'i': + First += 2; + return make<NameType>("operator-"); + case 'I': + First += 2; + return make<NameType>("operator-="); + case 'l': + First += 2; + return make<NameType>("operator*"); + case 'L': + First += 2; + return make<NameType>("operator*="); + case 'm': + First += 2; + return make<NameType>("operator--"); + } + return nullptr; + case 'n': + switch (look(1)) { + case 'a': + First += 2; + return make<NameType>("operator new[]"); + case 'e': + First += 2; + return make<NameType>("operator!="); + case 'g': + First += 2; + return make<NameType>("operator-"); + case 't': + First += 2; + return make<NameType>("operator!"); + case 'w': + First += 2; + return make<NameType>("operator new"); + } + return nullptr; + case 'o': + switch (look(1)) { + case 'o': + First += 2; + return make<NameType>("operator||"); + case 'r': + First += 2; + return make<NameType>("operator|"); + case 'R': + First += 2; + return make<NameType>("operator|="); + } + return nullptr; + case 'p': + switch (look(1)) { + case 'm': + First += 2; + return make<NameType>("operator->*"); + case 'l': + First += 2; + return make<NameType>("operator+"); + case 'L': + First += 2; + return make<NameType>("operator+="); + case 'p': + First += 2; + return make<NameType>("operator++"); + case 's': + First += 2; + return make<NameType>("operator+"); + case 't': + First += 2; + return make<NameType>("operator->"); + } + return nullptr; + case 'q': + if (look(1) == 'u') { + First += 2; + return make<NameType>("operator?"); + } + return nullptr; + case 'r': + switch (look(1)) { + case 'm': + First += 2; + return make<NameType>("operator%"); + case 'M': + First += 2; + return make<NameType>("operator%="); + case 's': + First += 2; + return make<NameType>("operator>>"); + case 'S': + First += 2; + return make<NameType>("operator>>="); + } + return nullptr; + case 's': + if (look(1) == 's') { + First += 2; + return make<NameType>("operator<=>"); + } + return nullptr; + // ::= v <digit> <source-name> # vendor extended operator + case 'v': + if (std::isdigit(look(1))) { + First += 2; + Node *SN = getDerived().parseSourceName(State); + if (SN == nullptr) + return nullptr; + return make<ConversionOperatorType>(SN); + } + return nullptr; + } + return nullptr; +} + +// <ctor-dtor-name> ::= C1 # complete object constructor +// ::= C2 # base object constructor +// ::= C3 # complete object allocating constructor +// extension ::= C4 # gcc old-style "[unified]" constructor +// extension ::= C5 # the COMDAT used for ctors +// ::= D0 # deleting destructor +// ::= D1 # complete object destructor +// ::= D2 # base object destructor +// extension ::= D4 # gcc old-style "[unified]" destructor +// extension ::= D5 # the COMDAT used for dtors +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseCtorDtorName(Node *&SoFar, + NameState *State) { + if (SoFar->getKind() == Node::KSpecialSubstitution) { + auto SSK = static_cast<SpecialSubstitution *>(SoFar)->SSK; + switch (SSK) { + case SpecialSubKind::string: + case SpecialSubKind::istream: + case SpecialSubKind::ostream: + case SpecialSubKind::iostream: + SoFar = make<ExpandedSpecialSubstitution>(SSK); + if (!SoFar) + return nullptr; + break; + default: + break; + } + } + + if (consumeIf('C')) { + bool IsInherited = consumeIf('I'); + if (look() != '1' && look() != '2' && look() != '3' && look() != '4' && + look() != '5') + return nullptr; + int Variant = look() - '0'; + ++First; + if (State) State->CtorDtorConversion = true; + if (IsInherited) { + if (getDerived().parseName(State) == nullptr) + return nullptr; + } + return make<CtorDtorName>(SoFar, /*IsDtor=*/false, Variant); + } + + if (look() == 'D' && (look(1) == '0' || look(1) == '1' || look(1) == '2' || + look(1) == '4' || look(1) == '5')) { + int Variant = look(1) - '0'; + First += 2; + if (State) State->CtorDtorConversion = true; + return make<CtorDtorName>(SoFar, /*IsDtor=*/true, Variant); + } + + return nullptr; +} + +// <nested-name> ::= N [<CV-Qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E +// ::= N [<CV-Qualifiers>] [<ref-qualifier>] <template-prefix> <template-args> E +// +// <prefix> ::= <prefix> <unqualified-name> +// ::= <template-prefix> <template-args> +// ::= <template-param> +// ::= <decltype> +// ::= # empty +// ::= <substitution> +// ::= <prefix> <data-member-prefix> +// extension ::= L +// +// <data-member-prefix> := <member source-name> [<template-args>] M +// +// <template-prefix> ::= <prefix> <template unqualified-name> +// ::= <template-param> +// ::= <substitution> +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseNestedName(NameState *State) { + if (!consumeIf('N')) + return nullptr; + + Qualifiers CVTmp = parseCVQualifiers(); + if (State) State->CVQualifiers = CVTmp; + + if (consumeIf('O')) { + if (State) State->ReferenceQualifier = FrefQualRValue; + } else if (consumeIf('R')) { + if (State) State->ReferenceQualifier = FrefQualLValue; + } else + if (State) State->ReferenceQualifier = FrefQualNone; + + Node *SoFar = nullptr; + auto PushComponent = [&](Node *Comp) { + if (!Comp) return false; + if (SoFar) SoFar = make<NestedName>(SoFar, Comp); + else SoFar = Comp; + if (State) State->EndsWithTemplateArgs = false; + return SoFar != nullptr; + }; + + if (consumeIf("St")) { + SoFar = make<NameType>("std"); + if (!SoFar) + return nullptr; + } + + while (!consumeIf('E')) { + consumeIf('L'); // extension + + // <data-member-prefix> := <member source-name> [<template-args>] M + if (consumeIf('M')) { + if (SoFar == nullptr) + return nullptr; + continue; + } + + // ::= <template-param> + if (look() == 'T') { + if (!PushComponent(getDerived().parseTemplateParam())) + return nullptr; + Subs.push_back(SoFar); + continue; + } + + // ::= <template-prefix> <template-args> + if (look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(State != nullptr); + if (TA == nullptr || SoFar == nullptr) + return nullptr; + SoFar = make<NameWithTemplateArgs>(SoFar, TA); + if (!SoFar) + return nullptr; + if (State) State->EndsWithTemplateArgs = true; + Subs.push_back(SoFar); + continue; + } + + // ::= <decltype> + if (look() == 'D' && (look(1) == 't' || look(1) == 'T')) { + if (!PushComponent(getDerived().parseDecltype())) + return nullptr; + Subs.push_back(SoFar); + continue; + } + + // ::= <substitution> + if (look() == 'S' && look(1) != 't') { + Node *S = getDerived().parseSubstitution(); + if (!PushComponent(S)) + return nullptr; + if (SoFar != S) + Subs.push_back(S); + continue; + } + + // Parse an <unqualified-name> thats actually a <ctor-dtor-name>. + if (look() == 'C' || (look() == 'D' && look(1) != 'C')) { + if (SoFar == nullptr) + return nullptr; + if (!PushComponent(getDerived().parseCtorDtorName(SoFar, State))) + return nullptr; + SoFar = getDerived().parseAbiTags(SoFar); + if (SoFar == nullptr) + return nullptr; + Subs.push_back(SoFar); + continue; + } + + // ::= <prefix> <unqualified-name> + if (!PushComponent(getDerived().parseUnqualifiedName(State))) + return nullptr; + Subs.push_back(SoFar); + } + + if (SoFar == nullptr || Subs.empty()) + return nullptr; + + Subs.pop_back(); + return SoFar; +} + +// <simple-id> ::= <source-name> [ <template-args> ] +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseSimpleId() { + Node *SN = getDerived().parseSourceName(/*NameState=*/nullptr); + if (SN == nullptr) + return nullptr; + if (look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + return make<NameWithTemplateArgs>(SN, TA); + } + return SN; +} + +// <destructor-name> ::= <unresolved-type> # e.g., ~T or ~decltype(f()) +// ::= <simple-id> # e.g., ~A<2*N> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseDestructorName() { + Node *Result; + if (std::isdigit(look())) + Result = getDerived().parseSimpleId(); + else + Result = getDerived().parseUnresolvedType(); + if (Result == nullptr) + return nullptr; + return make<DtorName>(Result); +} + +// <unresolved-type> ::= <template-param> +// ::= <decltype> +// ::= <substitution> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedType() { + if (look() == 'T') { + Node *TP = getDerived().parseTemplateParam(); + if (TP == nullptr) + return nullptr; + Subs.push_back(TP); + return TP; + } + if (look() == 'D') { + Node *DT = getDerived().parseDecltype(); + if (DT == nullptr) + return nullptr; + Subs.push_back(DT); + return DT; + } + return getDerived().parseSubstitution(); +} + +// <base-unresolved-name> ::= <simple-id> # unresolved name +// extension ::= <operator-name> # unresolved operator-function-id +// extension ::= <operator-name> <template-args> # unresolved operator template-id +// ::= on <operator-name> # unresolved operator-function-id +// ::= on <operator-name> <template-args> # unresolved operator template-id +// ::= dn <destructor-name> # destructor or pseudo-destructor; +// # e.g. ~X or ~X<N-1> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseBaseUnresolvedName() { + if (std::isdigit(look())) + return getDerived().parseSimpleId(); + + if (consumeIf("dn")) + return getDerived().parseDestructorName(); + + consumeIf("on"); + + Node *Oper = getDerived().parseOperatorName(/*NameState=*/nullptr); + if (Oper == nullptr) + return nullptr; + if (look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + return make<NameWithTemplateArgs>(Oper, TA); + } + return Oper; +} + +// <unresolved-name> +// extension ::= srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name> +// ::= [gs] <base-unresolved-name> # x or (with "gs") ::x +// ::= [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name> +// # A::x, N::y, A<T>::z; "gs" means leading "::" +// ::= sr <unresolved-type> <base-unresolved-name> # T::x / decltype(p)::x +// extension ::= sr <unresolved-type> <template-args> <base-unresolved-name> +// # T::N::x /decltype(p)::N::x +// (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name> +// +// <unresolved-qualifier-level> ::= <simple-id> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedName() { + Node *SoFar = nullptr; + + // srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name> + // srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name> + if (consumeIf("srN")) { + SoFar = getDerived().parseUnresolvedType(); + if (SoFar == nullptr) + return nullptr; + + if (look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + SoFar = make<NameWithTemplateArgs>(SoFar, TA); + if (!SoFar) + return nullptr; + } + + while (!consumeIf('E')) { + Node *Qual = getDerived().parseSimpleId(); + if (Qual == nullptr) + return nullptr; + SoFar = make<QualifiedName>(SoFar, Qual); + if (!SoFar) + return nullptr; + } + + Node *Base = getDerived().parseBaseUnresolvedName(); + if (Base == nullptr) + return nullptr; + return make<QualifiedName>(SoFar, Base); + } + + bool Global = consumeIf("gs"); + + // [gs] <base-unresolved-name> # x or (with "gs") ::x + if (!consumeIf("sr")) { + SoFar = getDerived().parseBaseUnresolvedName(); + if (SoFar == nullptr) + return nullptr; + if (Global) + SoFar = make<GlobalQualifiedName>(SoFar); + return SoFar; + } + + // [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name> + if (std::isdigit(look())) { + do { + Node *Qual = getDerived().parseSimpleId(); + if (Qual == nullptr) + return nullptr; + if (SoFar) + SoFar = make<QualifiedName>(SoFar, Qual); + else if (Global) + SoFar = make<GlobalQualifiedName>(Qual); + else + SoFar = Qual; + if (!SoFar) + return nullptr; + } while (!consumeIf('E')); + } + // sr <unresolved-type> <base-unresolved-name> + // sr <unresolved-type> <template-args> <base-unresolved-name> + else { + SoFar = getDerived().parseUnresolvedType(); + if (SoFar == nullptr) + return nullptr; + + if (look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + SoFar = make<NameWithTemplateArgs>(SoFar, TA); + if (!SoFar) + return nullptr; + } + } + + assert(SoFar != nullptr); + + Node *Base = getDerived().parseBaseUnresolvedName(); + if (Base == nullptr) + return nullptr; + return make<QualifiedName>(SoFar, Base); +} + +// <abi-tags> ::= <abi-tag> [<abi-tags>] +// <abi-tag> ::= B <source-name> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseAbiTags(Node *N) { + while (consumeIf('B')) { + StringView SN = parseBareSourceName(); + if (SN.empty()) + return nullptr; + N = make<AbiTagAttr>(N, SN); + if (!N) + return nullptr; + } + return N; +} + +// <number> ::= [n] <non-negative decimal integer> +template <typename Alloc, typename Derived> +StringView +AbstractManglingParser<Alloc, Derived>::parseNumber(bool AllowNegative) { + const char *Tmp = First; + if (AllowNegative) + consumeIf('n'); + if (numLeft() == 0 || !std::isdigit(*First)) + return StringView(); + while (numLeft() != 0 && std::isdigit(*First)) + ++First; + return StringView(Tmp, First); +} + +// <positive length number> ::= [0-9]* +template <typename Alloc, typename Derived> +bool AbstractManglingParser<Alloc, Derived>::parsePositiveInteger(size_t *Out) { + *Out = 0; + if (look() < '0' || look() > '9') + return true; + while (look() >= '0' && look() <= '9') { + *Out *= 10; + *Out += static_cast<size_t>(consume() - '0'); + } + return false; +} + +template <typename Alloc, typename Derived> +StringView AbstractManglingParser<Alloc, Derived>::parseBareSourceName() { + size_t Int = 0; + if (parsePositiveInteger(&Int) || numLeft() < Int) + return StringView(); + StringView R(First, First + Int); + First += Int; + return R; +} + +// <function-type> ::= [<CV-qualifiers>] [<exception-spec>] [Dx] F [Y] <bare-function-type> [<ref-qualifier>] E +// +// <exception-spec> ::= Do # non-throwing exception-specification (e.g., noexcept, throw()) +// ::= DO <expression> E # computed (instantiation-dependent) noexcept +// ::= Dw <type>+ E # dynamic exception specification with instantiation-dependent types +// +// <ref-qualifier> ::= R # & ref-qualifier +// <ref-qualifier> ::= O # && ref-qualifier +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseFunctionType() { + Qualifiers CVQuals = parseCVQualifiers(); + + Node *ExceptionSpec = nullptr; + if (consumeIf("Do")) { + ExceptionSpec = make<NameType>("noexcept"); + if (!ExceptionSpec) + return nullptr; + } else if (consumeIf("DO")) { + Node *E = getDerived().parseExpr(); + if (E == nullptr || !consumeIf('E')) + return nullptr; + ExceptionSpec = make<NoexceptSpec>(E); + if (!ExceptionSpec) + return nullptr; + } else if (consumeIf("Dw")) { + size_t SpecsBegin = Names.size(); + while (!consumeIf('E')) { + Node *T = getDerived().parseType(); + if (T == nullptr) + return nullptr; + Names.push_back(T); + } + ExceptionSpec = + make<DynamicExceptionSpec>(popTrailingNodeArray(SpecsBegin)); + if (!ExceptionSpec) + return nullptr; + } + + consumeIf("Dx"); // transaction safe + + if (!consumeIf('F')) + return nullptr; + consumeIf('Y'); // extern "C" + Node *ReturnType = getDerived().parseType(); + if (ReturnType == nullptr) + return nullptr; + + FunctionRefQual ReferenceQualifier = FrefQualNone; + size_t ParamsBegin = Names.size(); + while (true) { + if (consumeIf('E')) + break; + if (consumeIf('v')) + continue; + if (consumeIf("RE")) { + ReferenceQualifier = FrefQualLValue; + break; + } + if (consumeIf("OE")) { + ReferenceQualifier = FrefQualRValue; + break; + } + Node *T = getDerived().parseType(); + if (T == nullptr) + return nullptr; + Names.push_back(T); + } + + NodeArray Params = popTrailingNodeArray(ParamsBegin); + return make<FunctionType>(ReturnType, Params, CVQuals, + ReferenceQualifier, ExceptionSpec); +} + +// extension: +// <vector-type> ::= Dv <positive dimension number> _ <extended element type> +// ::= Dv [<dimension expression>] _ <element type> +// <extended element type> ::= <element type> +// ::= p # AltiVec vector pixel +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseVectorType() { + if (!consumeIf("Dv")) + return nullptr; + if (look() >= '1' && look() <= '9') { + StringView DimensionNumber = parseNumber(); + if (!consumeIf('_')) + return nullptr; + if (consumeIf('p')) + return make<PixelVectorType>(DimensionNumber); + Node *ElemType = getDerived().parseType(); + if (ElemType == nullptr) + return nullptr; + return make<VectorType>(ElemType, DimensionNumber); + } + + if (!consumeIf('_')) { + Node *DimExpr = getDerived().parseExpr(); + if (!DimExpr) + return nullptr; + if (!consumeIf('_')) + return nullptr; + Node *ElemType = getDerived().parseType(); + if (!ElemType) + return nullptr; + return make<VectorType>(ElemType, DimExpr); + } + Node *ElemType = getDerived().parseType(); + if (!ElemType) + return nullptr; + return make<VectorType>(ElemType, StringView()); +} + +// <decltype> ::= Dt <expression> E # decltype of an id-expression or class member access (C++0x) +// ::= DT <expression> E # decltype of an expression (C++0x) +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseDecltype() { + if (!consumeIf('D')) + return nullptr; + if (!consumeIf('t') && !consumeIf('T')) + return nullptr; + Node *E = getDerived().parseExpr(); + if (E == nullptr) + return nullptr; + if (!consumeIf('E')) + return nullptr; + return make<EnclosingExpr>("decltype(", E, ")"); +} + +// <array-type> ::= A <positive dimension number> _ <element type> +// ::= A [<dimension expression>] _ <element type> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseArrayType() { + if (!consumeIf('A')) + return nullptr; + + NodeOrString Dimension; + + if (std::isdigit(look())) { + Dimension = parseNumber(); + if (!consumeIf('_')) + return nullptr; + } else if (!consumeIf('_')) { + Node *DimExpr = getDerived().parseExpr(); + if (DimExpr == nullptr) + return nullptr; + if (!consumeIf('_')) + return nullptr; + Dimension = DimExpr; + } + + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<ArrayType>(Ty, Dimension); +} + +// <pointer-to-member-type> ::= M <class type> <member type> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parsePointerToMemberType() { + if (!consumeIf('M')) + return nullptr; + Node *ClassType = getDerived().parseType(); + if (ClassType == nullptr) + return nullptr; + Node *MemberType = getDerived().parseType(); + if (MemberType == nullptr) + return nullptr; + return make<PointerToMemberType>(ClassType, MemberType); +} + +// <class-enum-type> ::= <name> # non-dependent type name, dependent type name, or dependent typename-specifier +// ::= Ts <name> # dependent elaborated type specifier using 'struct' or 'class' +// ::= Tu <name> # dependent elaborated type specifier using 'union' +// ::= Te <name> # dependent elaborated type specifier using 'enum' +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseClassEnumType() { + StringView ElabSpef; + if (consumeIf("Ts")) + ElabSpef = "struct"; + else if (consumeIf("Tu")) + ElabSpef = "union"; + else if (consumeIf("Te")) + ElabSpef = "enum"; + + Node *Name = getDerived().parseName(); + if (Name == nullptr) + return nullptr; + + if (!ElabSpef.empty()) + return make<ElaboratedTypeSpefType>(ElabSpef, Name); + + return Name; +} + +// <qualified-type> ::= <qualifiers> <type> +// <qualifiers> ::= <extended-qualifier>* <CV-qualifiers> +// <extended-qualifier> ::= U <source-name> [<template-args>] # vendor extended type qualifier +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseQualifiedType() { + if (consumeIf('U')) { + StringView Qual = parseBareSourceName(); + if (Qual.empty()) + return nullptr; + + // FIXME parse the optional <template-args> here! + + // extension ::= U <objc-name> <objc-type> # objc-type<identifier> + if (Qual.startsWith("objcproto")) { + StringView ProtoSourceName = Qual.dropFront(std::strlen("objcproto")); + StringView Proto; + { + SwapAndRestore<const char *> SaveFirst(First, ProtoSourceName.begin()), + SaveLast(Last, ProtoSourceName.end()); + Proto = parseBareSourceName(); + } + if (Proto.empty()) + return nullptr; + Node *Child = getDerived().parseQualifiedType(); + if (Child == nullptr) + return nullptr; + return make<ObjCProtoName>(Child, Proto); + } + + Node *Child = getDerived().parseQualifiedType(); + if (Child == nullptr) + return nullptr; + return make<VendorExtQualType>(Child, Qual); + } + + Qualifiers Quals = parseCVQualifiers(); + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + if (Quals != QualNone) + Ty = make<QualType>(Ty, Quals); + return Ty; +} + +// <type> ::= <builtin-type> +// ::= <qualified-type> +// ::= <function-type> +// ::= <class-enum-type> +// ::= <array-type> +// ::= <pointer-to-member-type> +// ::= <template-param> +// ::= <template-template-param> <template-args> +// ::= <decltype> +// ::= P <type> # pointer +// ::= R <type> # l-value reference +// ::= O <type> # r-value reference (C++11) +// ::= C <type> # complex pair (C99) +// ::= G <type> # imaginary (C99) +// ::= <substitution> # See Compression below +// extension ::= U <objc-name> <objc-type> # objc-type<identifier> +// extension ::= <vector-type> # <vector-type> starts with Dv +// +// <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 + <number of digits in k1> + k1 +// <objc-type> ::= <source-name> # PU<11+>objcproto 11objc_object<source-name> 11objc_object -> id<source-name> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseType() { + Node *Result = nullptr; + + switch (look()) { + // ::= <qualified-type> + case 'r': + case 'V': + case 'K': { + unsigned AfterQuals = 0; + if (look(AfterQuals) == 'r') ++AfterQuals; + if (look(AfterQuals) == 'V') ++AfterQuals; + if (look(AfterQuals) == 'K') ++AfterQuals; + + if (look(AfterQuals) == 'F' || + (look(AfterQuals) == 'D' && + (look(AfterQuals + 1) == 'o' || look(AfterQuals + 1) == 'O' || + look(AfterQuals + 1) == 'w' || look(AfterQuals + 1) == 'x'))) { + Result = getDerived().parseFunctionType(); + break; + } + DEMANGLE_FALLTHROUGH; + } + case 'U': { + Result = getDerived().parseQualifiedType(); + break; + } + // <builtin-type> ::= v # void + case 'v': + ++First; + return make<NameType>("void"); + // ::= w # wchar_t + case 'w': + ++First; + return make<NameType>("wchar_t"); + // ::= b # bool + case 'b': + ++First; + return make<NameType>("bool"); + // ::= c # char + case 'c': + ++First; + return make<NameType>("char"); + // ::= a # signed char + case 'a': + ++First; + return make<NameType>("signed char"); + // ::= h # unsigned char + case 'h': + ++First; + return make<NameType>("unsigned char"); + // ::= s # short + case 's': + ++First; + return make<NameType>("short"); + // ::= t # unsigned short + case 't': + ++First; + return make<NameType>("unsigned short"); + // ::= i # int + case 'i': + ++First; + return make<NameType>("int"); + // ::= j # unsigned int + case 'j': + ++First; + return make<NameType>("unsigned int"); + // ::= l # long + case 'l': + ++First; + return make<NameType>("long"); + // ::= m # unsigned long + case 'm': + ++First; + return make<NameType>("unsigned long"); + // ::= x # long long, __int64 + case 'x': + ++First; + return make<NameType>("long long"); + // ::= y # unsigned long long, __int64 + case 'y': + ++First; + return make<NameType>("unsigned long long"); + // ::= n # __int128 + case 'n': + ++First; + return make<NameType>("__int128"); + // ::= o # unsigned __int128 + case 'o': + ++First; + return make<NameType>("unsigned __int128"); + // ::= f # float + case 'f': + ++First; + return make<NameType>("float"); + // ::= d # double + case 'd': + ++First; + return make<NameType>("double"); + // ::= e # long double, __float80 + case 'e': + ++First; + return make<NameType>("long double"); + // ::= g # __float128 + case 'g': + ++First; + return make<NameType>("__float128"); + // ::= z # ellipsis + case 'z': + ++First; + return make<NameType>("..."); + + // <builtin-type> ::= u <source-name> # vendor extended type + case 'u': { + ++First; + StringView Res = parseBareSourceName(); + if (Res.empty()) + return nullptr; + // Typically, <builtin-type>s are not considered substitution candidates, + // but the exception to that exception is vendor extended types (Itanium C++ + // ABI 5.9.1). + Result = make<NameType>(Res); + break; + } + case 'D': + switch (look(1)) { + // ::= Dd # IEEE 754r decimal floating point (64 bits) + case 'd': + First += 2; + return make<NameType>("decimal64"); + // ::= De # IEEE 754r decimal floating point (128 bits) + case 'e': + First += 2; + return make<NameType>("decimal128"); + // ::= Df # IEEE 754r decimal floating point (32 bits) + case 'f': + First += 2; + return make<NameType>("decimal32"); + // ::= Dh # IEEE 754r half-precision floating point (16 bits) + case 'h': + First += 2; + return make<NameType>("decimal16"); + // ::= Di # char32_t + case 'i': + First += 2; + return make<NameType>("char32_t"); + // ::= Ds # char16_t + case 's': + First += 2; + return make<NameType>("char16_t"); + // ::= Du # char8_t (C++2a, not yet in the Itanium spec) + case 'u': + First += 2; + return make<NameType>("char8_t"); + // ::= Da # auto (in dependent new-expressions) + case 'a': + First += 2; + return make<NameType>("auto"); + // ::= Dc # decltype(auto) + case 'c': + First += 2; + return make<NameType>("decltype(auto)"); + // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) + case 'n': + First += 2; + return make<NameType>("std::nullptr_t"); + + // ::= <decltype> + case 't': + case 'T': { + Result = getDerived().parseDecltype(); + break; + } + // extension ::= <vector-type> # <vector-type> starts with Dv + case 'v': { + Result = getDerived().parseVectorType(); + break; + } + // ::= Dp <type> # pack expansion (C++0x) + case 'p': { + First += 2; + Node *Child = getDerived().parseType(); + if (!Child) + return nullptr; + Result = make<ParameterPackExpansion>(Child); + break; + } + // Exception specifier on a function type. + case 'o': + case 'O': + case 'w': + // Transaction safe function type. + case 'x': + Result = getDerived().parseFunctionType(); + break; + } + break; + // ::= <function-type> + case 'F': { + Result = getDerived().parseFunctionType(); + break; + } + // ::= <array-type> + case 'A': { + Result = getDerived().parseArrayType(); + break; + } + // ::= <pointer-to-member-type> + case 'M': { + Result = getDerived().parsePointerToMemberType(); + break; + } + // ::= <template-param> + case 'T': { + // This could be an elaborate type specifier on a <class-enum-type>. + if (look(1) == 's' || look(1) == 'u' || look(1) == 'e') { + Result = getDerived().parseClassEnumType(); + break; + } + + Result = getDerived().parseTemplateParam(); + if (Result == nullptr) + return nullptr; + + // Result could be either of: + // <type> ::= <template-param> + // <type> ::= <template-template-param> <template-args> + // + // <template-template-param> ::= <template-param> + // ::= <substitution> + // + // If this is followed by some <template-args>, and we're permitted to + // parse them, take the second production. + + if (TryToParseTemplateArgs && look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + Result = make<NameWithTemplateArgs>(Result, TA); + } + break; + } + // ::= P <type> # pointer + case 'P': { + ++First; + Node *Ptr = getDerived().parseType(); + if (Ptr == nullptr) + return nullptr; + Result = make<PointerType>(Ptr); + break; + } + // ::= R <type> # l-value reference + case 'R': { + ++First; + Node *Ref = getDerived().parseType(); + if (Ref == nullptr) + return nullptr; + Result = make<ReferenceType>(Ref, ReferenceKind::LValue); + break; + } + // ::= O <type> # r-value reference (C++11) + case 'O': { + ++First; + Node *Ref = getDerived().parseType(); + if (Ref == nullptr) + return nullptr; + Result = make<ReferenceType>(Ref, ReferenceKind::RValue); + break; + } + // ::= C <type> # complex pair (C99) + case 'C': { + ++First; + Node *P = getDerived().parseType(); + if (P == nullptr) + return nullptr; + Result = make<PostfixQualifiedType>(P, " complex"); + break; + } + // ::= G <type> # imaginary (C99) + case 'G': { + ++First; + Node *P = getDerived().parseType(); + if (P == nullptr) + return P; + Result = make<PostfixQualifiedType>(P, " imaginary"); + break; + } + // ::= <substitution> # See Compression below + case 'S': { + if (look(1) && look(1) != 't') { + Node *Sub = getDerived().parseSubstitution(); + if (Sub == nullptr) + return nullptr; + + // Sub could be either of: + // <type> ::= <substitution> + // <type> ::= <template-template-param> <template-args> + // + // <template-template-param> ::= <template-param> + // ::= <substitution> + // + // If this is followed by some <template-args>, and we're permitted to + // parse them, take the second production. + + if (TryToParseTemplateArgs && look() == 'I') { + Node *TA = getDerived().parseTemplateArgs(); + if (TA == nullptr) + return nullptr; + Result = make<NameWithTemplateArgs>(Sub, TA); + break; + } + + // If all we parsed was a substitution, don't re-insert into the + // substitution table. + return Sub; + } + DEMANGLE_FALLTHROUGH; + } + // ::= <class-enum-type> + default: { + Result = getDerived().parseClassEnumType(); + break; + } + } + + // If we parsed a type, insert it into the substitution table. Note that all + // <builtin-type>s and <substitution>s have already bailed out, because they + // don't get substitutions. + if (Result != nullptr) + Subs.push_back(Result); + return Result; +} + +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parsePrefixExpr(StringView Kind) { + Node *E = getDerived().parseExpr(); + if (E == nullptr) + return nullptr; + return make<PrefixExpr>(Kind, E); +} + +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseBinaryExpr(StringView Kind) { + Node *LHS = getDerived().parseExpr(); + if (LHS == nullptr) + return nullptr; + Node *RHS = getDerived().parseExpr(); + if (RHS == nullptr) + return nullptr; + return make<BinaryExpr>(LHS, Kind, RHS); +} + +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseIntegerLiteral(StringView Lit) { + StringView Tmp = parseNumber(true); + if (!Tmp.empty() && consumeIf('E')) + return make<IntegerLiteral>(Lit, Tmp); + return nullptr; +} + +// <CV-Qualifiers> ::= [r] [V] [K] +template <typename Alloc, typename Derived> +Qualifiers AbstractManglingParser<Alloc, Derived>::parseCVQualifiers() { + Qualifiers CVR = QualNone; + if (consumeIf('r')) + CVR |= QualRestrict; + if (consumeIf('V')) + CVR |= QualVolatile; + if (consumeIf('K')) + CVR |= QualConst; + return CVR; +} + +// <function-param> ::= fp <top-level CV-Qualifiers> _ # L == 0, first parameter +// ::= fp <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L == 0, second and later parameters +// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> _ # L > 0, first parameter +// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L > 0, second and later parameters +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseFunctionParam() { + if (consumeIf("fp")) { + parseCVQualifiers(); + StringView Num = parseNumber(); + if (!consumeIf('_')) + return nullptr; + return make<FunctionParam>(Num); + } + if (consumeIf("fL")) { + if (parseNumber().empty()) + return nullptr; + if (!consumeIf('p')) + return nullptr; + parseCVQualifiers(); + StringView Num = parseNumber(); + if (!consumeIf('_')) + return nullptr; + return make<FunctionParam>(Num); + } + return nullptr; +} + +// [gs] nw <expression>* _ <type> E # new (expr-list) type +// [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init) +// [gs] na <expression>* _ <type> E # new[] (expr-list) type +// [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init) +// <initializer> ::= pi <expression>* E # parenthesized initialization +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseNewExpr() { + bool Global = consumeIf("gs"); + bool IsArray = look(1) == 'a'; + if (!consumeIf("nw") && !consumeIf("na")) + return nullptr; + size_t Exprs = Names.size(); + while (!consumeIf('_')) { + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return nullptr; + Names.push_back(Ex); + } + NodeArray ExprList = popTrailingNodeArray(Exprs); + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return Ty; + if (consumeIf("pi")) { + size_t InitsBegin = Names.size(); + while (!consumeIf('E')) { + Node *Init = getDerived().parseExpr(); + if (Init == nullptr) + return Init; + Names.push_back(Init); + } + NodeArray Inits = popTrailingNodeArray(InitsBegin); + return make<NewExpr>(ExprList, Ty, Inits, Global, IsArray); + } else if (!consumeIf('E')) + return nullptr; + return make<NewExpr>(ExprList, Ty, NodeArray(), Global, IsArray); +} + +// cv <type> <expression> # conversion with one argument +// cv <type> _ <expression>* E # conversion with a different number of arguments +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseConversionExpr() { + if (!consumeIf("cv")) + return nullptr; + Node *Ty; + { + SwapAndRestore<bool> SaveTemp(TryToParseTemplateArgs, false); + Ty = getDerived().parseType(); + } + + if (Ty == nullptr) + return nullptr; + + if (consumeIf('_')) { + size_t ExprsBegin = Names.size(); + while (!consumeIf('E')) { + Node *E = getDerived().parseExpr(); + if (E == nullptr) + return E; + Names.push_back(E); + } + NodeArray Exprs = popTrailingNodeArray(ExprsBegin); + return make<ConversionExpr>(Ty, Exprs); + } + + Node *E[1] = {getDerived().parseExpr()}; + if (E[0] == nullptr) + return nullptr; + return make<ConversionExpr>(Ty, makeNodeArray(E, E + 1)); +} + +// <expr-primary> ::= L <type> <value number> E # integer literal +// ::= L <type> <value float> E # floating literal +// ::= L <string type> E # string literal +// ::= L <nullptr type> E # nullptr literal (i.e., "LDnE") +// ::= L <lambda type> E # lambda expression +// FIXME: ::= L <type> <real-part float> _ <imag-part float> E # complex floating point literal (C 2000) +// ::= L <mangled-name> E # external name +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseExprPrimary() { + if (!consumeIf('L')) + return nullptr; + switch (look()) { + case 'w': + ++First; + return getDerived().parseIntegerLiteral("wchar_t"); + case 'b': + if (consumeIf("b0E")) + return make<BoolExpr>(0); + if (consumeIf("b1E")) + return make<BoolExpr>(1); + return nullptr; + case 'c': + ++First; + return getDerived().parseIntegerLiteral("char"); + case 'a': + ++First; + return getDerived().parseIntegerLiteral("signed char"); + case 'h': + ++First; + return getDerived().parseIntegerLiteral("unsigned char"); + case 's': + ++First; + return getDerived().parseIntegerLiteral("short"); + case 't': + ++First; + return getDerived().parseIntegerLiteral("unsigned short"); + case 'i': + ++First; + return getDerived().parseIntegerLiteral(""); + case 'j': + ++First; + return getDerived().parseIntegerLiteral("u"); + case 'l': + ++First; + return getDerived().parseIntegerLiteral("l"); + case 'm': + ++First; + return getDerived().parseIntegerLiteral("ul"); + case 'x': + ++First; + return getDerived().parseIntegerLiteral("ll"); + case 'y': + ++First; + return getDerived().parseIntegerLiteral("ull"); + case 'n': + ++First; + return getDerived().parseIntegerLiteral("__int128"); + case 'o': + ++First; + return getDerived().parseIntegerLiteral("unsigned __int128"); + case 'f': + ++First; + return getDerived().template parseFloatingLiteral<float>(); + case 'd': + ++First; + return getDerived().template parseFloatingLiteral<double>(); + case 'e': + ++First; + return getDerived().template parseFloatingLiteral<long double>(); + case '_': + if (consumeIf("_Z")) { + Node *R = getDerived().parseEncoding(); + if (R != nullptr && consumeIf('E')) + return R; + } + return nullptr; + case 'A': { + Node *T = getDerived().parseType(); + if (T == nullptr) + return nullptr; + // FIXME: We need to include the string contents in the mangling. + if (consumeIf('E')) + return make<StringLiteral>(T); + return nullptr; + } + case 'D': + if (consumeIf("DnE")) + return make<NameType>("nullptr"); + return nullptr; + case 'T': + // Invalid mangled name per + // http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html + return nullptr; + case 'U': { + // FIXME: Should we support LUb... for block literals? + if (look(1) != 'l') + return nullptr; + Node *T = parseUnnamedTypeName(nullptr); + if (!T || !consumeIf('E')) + return nullptr; + return make<LambdaExpr>(T); + } + default: { + // might be named type + Node *T = getDerived().parseType(); + if (T == nullptr) + return nullptr; + StringView N = parseNumber(); + if (N.empty()) + return nullptr; + if (!consumeIf('E')) + return nullptr; + return make<IntegerCastExpr>(T, N); + } + } +} + +// <braced-expression> ::= <expression> +// ::= di <field source-name> <braced-expression> # .name = expr +// ::= dx <index expression> <braced-expression> # [expr] = expr +// ::= dX <range begin expression> <range end expression> <braced-expression> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseBracedExpr() { + if (look() == 'd') { + switch (look(1)) { + case 'i': { + First += 2; + Node *Field = getDerived().parseSourceName(/*NameState=*/nullptr); + if (Field == nullptr) + return nullptr; + Node *Init = getDerived().parseBracedExpr(); + if (Init == nullptr) + return nullptr; + return make<BracedExpr>(Field, Init, /*isArray=*/false); + } + case 'x': { + First += 2; + Node *Index = getDerived().parseExpr(); + if (Index == nullptr) + return nullptr; + Node *Init = getDerived().parseBracedExpr(); + if (Init == nullptr) + return nullptr; + return make<BracedExpr>(Index, Init, /*isArray=*/true); + } + case 'X': { + First += 2; + Node *RangeBegin = getDerived().parseExpr(); + if (RangeBegin == nullptr) + return nullptr; + Node *RangeEnd = getDerived().parseExpr(); + if (RangeEnd == nullptr) + return nullptr; + Node *Init = getDerived().parseBracedExpr(); + if (Init == nullptr) + return nullptr; + return make<BracedRangeExpr>(RangeBegin, RangeEnd, Init); + } + } + } + return getDerived().parseExpr(); +} + +// (not yet in the spec) +// <fold-expr> ::= fL <binary-operator-name> <expression> <expression> +// ::= fR <binary-operator-name> <expression> <expression> +// ::= fl <binary-operator-name> <expression> +// ::= fr <binary-operator-name> <expression> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseFoldExpr() { + if (!consumeIf('f')) + return nullptr; + + char FoldKind = look(); + bool IsLeftFold, HasInitializer; + HasInitializer = FoldKind == 'L' || FoldKind == 'R'; + if (FoldKind == 'l' || FoldKind == 'L') + IsLeftFold = true; + else if (FoldKind == 'r' || FoldKind == 'R') + IsLeftFold = false; + else + return nullptr; + ++First; + + // FIXME: This map is duplicated in parseOperatorName and parseExpr. + StringView OperatorName; + if (consumeIf("aa")) OperatorName = "&&"; + else if (consumeIf("an")) OperatorName = "&"; + else if (consumeIf("aN")) OperatorName = "&="; + else if (consumeIf("aS")) OperatorName = "="; + else if (consumeIf("cm")) OperatorName = ","; + else if (consumeIf("ds")) OperatorName = ".*"; + else if (consumeIf("dv")) OperatorName = "/"; + else if (consumeIf("dV")) OperatorName = "/="; + else if (consumeIf("eo")) OperatorName = "^"; + else if (consumeIf("eO")) OperatorName = "^="; + else if (consumeIf("eq")) OperatorName = "=="; + else if (consumeIf("ge")) OperatorName = ">="; + else if (consumeIf("gt")) OperatorName = ">"; + else if (consumeIf("le")) OperatorName = "<="; + else if (consumeIf("ls")) OperatorName = "<<"; + else if (consumeIf("lS")) OperatorName = "<<="; + else if (consumeIf("lt")) OperatorName = "<"; + else if (consumeIf("mi")) OperatorName = "-"; + else if (consumeIf("mI")) OperatorName = "-="; + else if (consumeIf("ml")) OperatorName = "*"; + else if (consumeIf("mL")) OperatorName = "*="; + else if (consumeIf("ne")) OperatorName = "!="; + else if (consumeIf("oo")) OperatorName = "||"; + else if (consumeIf("or")) OperatorName = "|"; + else if (consumeIf("oR")) OperatorName = "|="; + else if (consumeIf("pl")) OperatorName = "+"; + else if (consumeIf("pL")) OperatorName = "+="; + else if (consumeIf("rm")) OperatorName = "%"; + else if (consumeIf("rM")) OperatorName = "%="; + else if (consumeIf("rs")) OperatorName = ">>"; + else if (consumeIf("rS")) OperatorName = ">>="; + else return nullptr; + + Node *Pack = getDerived().parseExpr(), *Init = nullptr; + if (Pack == nullptr) + return nullptr; + if (HasInitializer) { + Init = getDerived().parseExpr(); + if (Init == nullptr) + return nullptr; + } + + if (IsLeftFold && Init) + std::swap(Pack, Init); + + return make<FoldExpr>(IsLeftFold, OperatorName, Pack, Init); +} + +// <expression> ::= <unary operator-name> <expression> +// ::= <binary operator-name> <expression> <expression> +// ::= <ternary operator-name> <expression> <expression> <expression> +// ::= cl <expression>+ E # call +// ::= cv <type> <expression> # conversion with one argument +// ::= cv <type> _ <expression>* E # conversion with a different number of arguments +// ::= [gs] nw <expression>* _ <type> E # new (expr-list) type +// ::= [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init) +// ::= [gs] na <expression>* _ <type> E # new[] (expr-list) type +// ::= [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init) +// ::= [gs] dl <expression> # delete expression +// ::= [gs] da <expression> # delete[] expression +// ::= pp_ <expression> # prefix ++ +// ::= mm_ <expression> # prefix -- +// ::= ti <type> # typeid (type) +// ::= te <expression> # typeid (expression) +// ::= dc <type> <expression> # dynamic_cast<type> (expression) +// ::= sc <type> <expression> # static_cast<type> (expression) +// ::= cc <type> <expression> # const_cast<type> (expression) +// ::= rc <type> <expression> # reinterpret_cast<type> (expression) +// ::= st <type> # sizeof (a type) +// ::= sz <expression> # sizeof (an expression) +// ::= at <type> # alignof (a type) +// ::= az <expression> # alignof (an expression) +// ::= nx <expression> # noexcept (expression) +// ::= <template-param> +// ::= <function-param> +// ::= dt <expression> <unresolved-name> # expr.name +// ::= pt <expression> <unresolved-name> # expr->name +// ::= ds <expression> <expression> # expr.*expr +// ::= sZ <template-param> # size of a parameter pack +// ::= sZ <function-param> # size of a function parameter pack +// ::= sP <template-arg>* E # sizeof...(T), size of a captured template parameter pack from an alias template +// ::= sp <expression> # pack expansion +// ::= tw <expression> # throw expression +// ::= tr # throw with no operand (rethrow) +// ::= <unresolved-name> # f(p), N::f(p), ::f(p), +// # freestanding dependent name (e.g., T::x), +// # objectless nonstatic member reference +// ::= fL <binary-operator-name> <expression> <expression> +// ::= fR <binary-operator-name> <expression> <expression> +// ::= fl <binary-operator-name> <expression> +// ::= fr <binary-operator-name> <expression> +// ::= <expr-primary> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseExpr() { + bool Global = consumeIf("gs"); + if (numLeft() < 2) + return nullptr; + + switch (*First) { + case 'L': + return getDerived().parseExprPrimary(); + case 'T': + return getDerived().parseTemplateParam(); + case 'f': { + // Disambiguate a fold expression from a <function-param>. + if (look(1) == 'p' || (look(1) == 'L' && std::isdigit(look(2)))) + return getDerived().parseFunctionParam(); + return getDerived().parseFoldExpr(); + } + case 'a': + switch (First[1]) { + case 'a': + First += 2; + return getDerived().parseBinaryExpr("&&"); + case 'd': + First += 2; + return getDerived().parsePrefixExpr("&"); + case 'n': + First += 2; + return getDerived().parseBinaryExpr("&"); + case 'N': + First += 2; + return getDerived().parseBinaryExpr("&="); + case 'S': + First += 2; + return getDerived().parseBinaryExpr("="); + case 't': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<EnclosingExpr>("alignof (", Ty, ")"); + } + case 'z': { + First += 2; + Node *Ty = getDerived().parseExpr(); + if (Ty == nullptr) + return nullptr; + return make<EnclosingExpr>("alignof (", Ty, ")"); + } + } + return nullptr; + case 'c': + switch (First[1]) { + // cc <type> <expression> # const_cast<type>(expression) + case 'c': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return Ty; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<CastExpr>("const_cast", Ty, Ex); + } + // cl <expression>+ E # call + case 'l': { + First += 2; + Node *Callee = getDerived().parseExpr(); + if (Callee == nullptr) + return Callee; + size_t ExprsBegin = Names.size(); + while (!consumeIf('E')) { + Node *E = getDerived().parseExpr(); + if (E == nullptr) + return E; + Names.push_back(E); + } + return make<CallExpr>(Callee, popTrailingNodeArray(ExprsBegin)); + } + case 'm': + First += 2; + return getDerived().parseBinaryExpr(","); + case 'o': + First += 2; + return getDerived().parsePrefixExpr("~"); + case 'v': + return getDerived().parseConversionExpr(); + } + return nullptr; + case 'd': + switch (First[1]) { + case 'a': { + First += 2; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<DeleteExpr>(Ex, Global, /*is_array=*/true); + } + case 'c': { + First += 2; + Node *T = getDerived().parseType(); + if (T == nullptr) + return T; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<CastExpr>("dynamic_cast", T, Ex); + } + case 'e': + First += 2; + return getDerived().parsePrefixExpr("*"); + case 'l': { + First += 2; + Node *E = getDerived().parseExpr(); + if (E == nullptr) + return E; + return make<DeleteExpr>(E, Global, /*is_array=*/false); + } + case 'n': + return getDerived().parseUnresolvedName(); + case 's': { + First += 2; + Node *LHS = getDerived().parseExpr(); + if (LHS == nullptr) + return nullptr; + Node *RHS = getDerived().parseExpr(); + if (RHS == nullptr) + return nullptr; + return make<MemberExpr>(LHS, ".*", RHS); + } + case 't': { + First += 2; + Node *LHS = getDerived().parseExpr(); + if (LHS == nullptr) + return LHS; + Node *RHS = getDerived().parseExpr(); + if (RHS == nullptr) + return nullptr; + return make<MemberExpr>(LHS, ".", RHS); + } + case 'v': + First += 2; + return getDerived().parseBinaryExpr("/"); + case 'V': + First += 2; + return getDerived().parseBinaryExpr("/="); + } + return nullptr; + case 'e': + switch (First[1]) { + case 'o': + First += 2; + return getDerived().parseBinaryExpr("^"); + case 'O': + First += 2; + return getDerived().parseBinaryExpr("^="); + case 'q': + First += 2; + return getDerived().parseBinaryExpr("=="); + } + return nullptr; + case 'g': + switch (First[1]) { + case 'e': + First += 2; + return getDerived().parseBinaryExpr(">="); + case 't': + First += 2; + return getDerived().parseBinaryExpr(">"); + } + return nullptr; + case 'i': + switch (First[1]) { + case 'x': { + First += 2; + Node *Base = getDerived().parseExpr(); + if (Base == nullptr) + return nullptr; + Node *Index = getDerived().parseExpr(); + if (Index == nullptr) + return Index; + return make<ArraySubscriptExpr>(Base, Index); + } + case 'l': { + First += 2; + size_t InitsBegin = Names.size(); + while (!consumeIf('E')) { + Node *E = getDerived().parseBracedExpr(); + if (E == nullptr) + return nullptr; + Names.push_back(E); + } + return make<InitListExpr>(nullptr, popTrailingNodeArray(InitsBegin)); + } + } + return nullptr; + case 'l': + switch (First[1]) { + case 'e': + First += 2; + return getDerived().parseBinaryExpr("<="); + case 's': + First += 2; + return getDerived().parseBinaryExpr("<<"); + case 'S': + First += 2; + return getDerived().parseBinaryExpr("<<="); + case 't': + First += 2; + return getDerived().parseBinaryExpr("<"); + } + return nullptr; + case 'm': + switch (First[1]) { + case 'i': + First += 2; + return getDerived().parseBinaryExpr("-"); + case 'I': + First += 2; + return getDerived().parseBinaryExpr("-="); + case 'l': + First += 2; + return getDerived().parseBinaryExpr("*"); + case 'L': + First += 2; + return getDerived().parseBinaryExpr("*="); + case 'm': + First += 2; + if (consumeIf('_')) + return getDerived().parsePrefixExpr("--"); + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return nullptr; + return make<PostfixExpr>(Ex, "--"); + } + return nullptr; + case 'n': + switch (First[1]) { + case 'a': + case 'w': + return getDerived().parseNewExpr(); + case 'e': + First += 2; + return getDerived().parseBinaryExpr("!="); + case 'g': + First += 2; + return getDerived().parsePrefixExpr("-"); + case 't': + First += 2; + return getDerived().parsePrefixExpr("!"); + case 'x': + First += 2; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<EnclosingExpr>("noexcept (", Ex, ")"); + } + return nullptr; + case 'o': + switch (First[1]) { + case 'n': + return getDerived().parseUnresolvedName(); + case 'o': + First += 2; + return getDerived().parseBinaryExpr("||"); + case 'r': + First += 2; + return getDerived().parseBinaryExpr("|"); + case 'R': + First += 2; + return getDerived().parseBinaryExpr("|="); + } + return nullptr; + case 'p': + switch (First[1]) { + case 'm': + First += 2; + return getDerived().parseBinaryExpr("->*"); + case 'l': + First += 2; + return getDerived().parseBinaryExpr("+"); + case 'L': + First += 2; + return getDerived().parseBinaryExpr("+="); + case 'p': { + First += 2; + if (consumeIf('_')) + return getDerived().parsePrefixExpr("++"); + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<PostfixExpr>(Ex, "++"); + } + case 's': + First += 2; + return getDerived().parsePrefixExpr("+"); + case 't': { + First += 2; + Node *L = getDerived().parseExpr(); + if (L == nullptr) + return nullptr; + Node *R = getDerived().parseExpr(); + if (R == nullptr) + return nullptr; + return make<MemberExpr>(L, "->", R); + } + } + return nullptr; + case 'q': + if (First[1] == 'u') { + First += 2; + Node *Cond = getDerived().parseExpr(); + if (Cond == nullptr) + return nullptr; + Node *LHS = getDerived().parseExpr(); + if (LHS == nullptr) + return nullptr; + Node *RHS = getDerived().parseExpr(); + if (RHS == nullptr) + return nullptr; + return make<ConditionalExpr>(Cond, LHS, RHS); + } + return nullptr; + case 'r': + switch (First[1]) { + case 'c': { + First += 2; + Node *T = getDerived().parseType(); + if (T == nullptr) + return T; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<CastExpr>("reinterpret_cast", T, Ex); + } + case 'm': + First += 2; + return getDerived().parseBinaryExpr("%"); + case 'M': + First += 2; + return getDerived().parseBinaryExpr("%="); + case 's': + First += 2; + return getDerived().parseBinaryExpr(">>"); + case 'S': + First += 2; + return getDerived().parseBinaryExpr(">>="); + } + return nullptr; + case 's': + switch (First[1]) { + case 'c': { + First += 2; + Node *T = getDerived().parseType(); + if (T == nullptr) + return T; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<CastExpr>("static_cast", T, Ex); + } + case 'p': { + First += 2; + Node *Child = getDerived().parseExpr(); + if (Child == nullptr) + return nullptr; + return make<ParameterPackExpansion>(Child); + } + case 'r': + return getDerived().parseUnresolvedName(); + case 't': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return Ty; + return make<EnclosingExpr>("sizeof (", Ty, ")"); + } + case 'z': { + First += 2; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<EnclosingExpr>("sizeof (", Ex, ")"); + } + case 'Z': + First += 2; + if (look() == 'T') { + Node *R = getDerived().parseTemplateParam(); + if (R == nullptr) + return nullptr; + return make<SizeofParamPackExpr>(R); + } else if (look() == 'f') { + Node *FP = getDerived().parseFunctionParam(); + if (FP == nullptr) + return nullptr; + return make<EnclosingExpr>("sizeof... (", FP, ")"); + } + return nullptr; + case 'P': { + First += 2; + size_t ArgsBegin = Names.size(); + while (!consumeIf('E')) { + Node *Arg = getDerived().parseTemplateArg(); + if (Arg == nullptr) + return nullptr; + Names.push_back(Arg); + } + auto *Pack = make<NodeArrayNode>(popTrailingNodeArray(ArgsBegin)); + if (!Pack) + return nullptr; + return make<EnclosingExpr>("sizeof... (", Pack, ")"); + } + } + return nullptr; + case 't': + switch (First[1]) { + case 'e': { + First += 2; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return Ex; + return make<EnclosingExpr>("typeid (", Ex, ")"); + } + case 'i': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return Ty; + return make<EnclosingExpr>("typeid (", Ty, ")"); + } + case 'l': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + size_t InitsBegin = Names.size(); + while (!consumeIf('E')) { + Node *E = getDerived().parseBracedExpr(); + if (E == nullptr) + return nullptr; + Names.push_back(E); + } + return make<InitListExpr>(Ty, popTrailingNodeArray(InitsBegin)); + } + case 'r': + First += 2; + return make<NameType>("throw"); + case 'w': { + First += 2; + Node *Ex = getDerived().parseExpr(); + if (Ex == nullptr) + return nullptr; + return make<ThrowExpr>(Ex); + } + } + return nullptr; + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + return getDerived().parseUnresolvedName(); + } + + if (consumeIf("u8__uuidoft")) { + Node *Ty = getDerived().parseType(); + if (!Ty) + return nullptr; + return make<UUIDOfExpr>(Ty); + } + + if (consumeIf("u8__uuidofz")) { + Node *Ex = getDerived().parseExpr(); + if (!Ex) + return nullptr; + return make<UUIDOfExpr>(Ex); + } + + return nullptr; +} + +// <call-offset> ::= h <nv-offset> _ +// ::= v <v-offset> _ +// +// <nv-offset> ::= <offset number> +// # non-virtual base override +// +// <v-offset> ::= <offset number> _ <virtual offset number> +// # virtual base override, with vcall offset +template <typename Alloc, typename Derived> +bool AbstractManglingParser<Alloc, Derived>::parseCallOffset() { + // Just scan through the call offset, we never add this information into the + // output. + if (consumeIf('h')) + return parseNumber(true).empty() || !consumeIf('_'); + if (consumeIf('v')) + return parseNumber(true).empty() || !consumeIf('_') || + parseNumber(true).empty() || !consumeIf('_'); + return true; +} + +// <special-name> ::= TV <type> # virtual table +// ::= TT <type> # VTT structure (construction vtable index) +// ::= TI <type> # typeinfo structure +// ::= TS <type> # typeinfo name (null-terminated byte string) +// ::= Tc <call-offset> <call-offset> <base encoding> +// # base is the nominal target function of thunk +// # first call-offset is 'this' adjustment +// # second call-offset is result adjustment +// ::= T <call-offset> <base encoding> +// # base is the nominal target function of thunk +// ::= GV <object name> # Guard variable for one-time initialization +// # No <type> +// ::= TW <object name> # Thread-local wrapper +// ::= TH <object name> # Thread-local initialization +// ::= GR <object name> _ # First temporary +// ::= GR <object name> <seq-id> _ # Subsequent temporaries +// extension ::= TC <first type> <number> _ <second type> # construction vtable for second-in-first +// extension ::= GR <object name> # reference temporary for object +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseSpecialName() { + switch (look()) { + case 'T': + switch (look(1)) { + // TV <type> # virtual table + case 'V': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<SpecialName>("vtable for ", Ty); + } + // TT <type> # VTT structure (construction vtable index) + case 'T': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<SpecialName>("VTT for ", Ty); + } + // TI <type> # typeinfo structure + case 'I': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<SpecialName>("typeinfo for ", Ty); + } + // TS <type> # typeinfo name (null-terminated byte string) + case 'S': { + First += 2; + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + return make<SpecialName>("typeinfo name for ", Ty); + } + // Tc <call-offset> <call-offset> <base encoding> + case 'c': { + First += 2; + if (parseCallOffset() || parseCallOffset()) + return nullptr; + Node *Encoding = getDerived().parseEncoding(); + if (Encoding == nullptr) + return nullptr; + return make<SpecialName>("covariant return thunk to ", Encoding); + } + // extension ::= TC <first type> <number> _ <second type> + // # construction vtable for second-in-first + case 'C': { + First += 2; + Node *FirstType = getDerived().parseType(); + if (FirstType == nullptr) + return nullptr; + if (parseNumber(true).empty() || !consumeIf('_')) + return nullptr; + Node *SecondType = getDerived().parseType(); + if (SecondType == nullptr) + return nullptr; + return make<CtorVtableSpecialName>(SecondType, FirstType); + } + // TW <object name> # Thread-local wrapper + case 'W': { + First += 2; + Node *Name = getDerived().parseName(); + if (Name == nullptr) + return nullptr; + return make<SpecialName>("thread-local wrapper routine for ", Name); + } + // TH <object name> # Thread-local initialization + case 'H': { + First += 2; + Node *Name = getDerived().parseName(); + if (Name == nullptr) + return nullptr; + return make<SpecialName>("thread-local initialization routine for ", Name); + } + // T <call-offset> <base encoding> + default: { + ++First; + bool IsVirt = look() == 'v'; + if (parseCallOffset()) + return nullptr; + Node *BaseEncoding = getDerived().parseEncoding(); + if (BaseEncoding == nullptr) + return nullptr; + if (IsVirt) + return make<SpecialName>("virtual thunk to ", BaseEncoding); + else + return make<SpecialName>("non-virtual thunk to ", BaseEncoding); + } + } + case 'G': + switch (look(1)) { + // GV <object name> # Guard variable for one-time initialization + case 'V': { + First += 2; + Node *Name = getDerived().parseName(); + if (Name == nullptr) + return nullptr; + return make<SpecialName>("guard variable for ", Name); + } + // GR <object name> # reference temporary for object + // GR <object name> _ # First temporary + // GR <object name> <seq-id> _ # Subsequent temporaries + case 'R': { + First += 2; + Node *Name = getDerived().parseName(); + if (Name == nullptr) + return nullptr; + size_t Count; + bool ParsedSeqId = !parseSeqId(&Count); + if (!consumeIf('_') && ParsedSeqId) + return nullptr; + return make<SpecialName>("reference temporary for ", Name); + } + } + } + return nullptr; +} + +// <encoding> ::= <function name> <bare-function-type> +// ::= <data name> +// ::= <special-name> +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseEncoding() { + if (look() == 'G' || look() == 'T') + return getDerived().parseSpecialName(); + + auto IsEndOfEncoding = [&] { + // The set of chars that can potentially follow an <encoding> (none of which + // can start a <type>). Enumerating these allows us to avoid speculative + // parsing. + return numLeft() == 0 || look() == 'E' || look() == '.' || look() == '_'; + }; + + NameState NameInfo(this); + Node *Name = getDerived().parseName(&NameInfo); + if (Name == nullptr) + return nullptr; + + if (resolveForwardTemplateRefs(NameInfo)) + return nullptr; + + if (IsEndOfEncoding()) + return Name; + + Node *Attrs = nullptr; + if (consumeIf("Ua9enable_ifI")) { + size_t BeforeArgs = Names.size(); + while (!consumeIf('E')) { + Node *Arg = getDerived().parseTemplateArg(); + if (Arg == nullptr) + return nullptr; + Names.push_back(Arg); + } + Attrs = make<EnableIfAttr>(popTrailingNodeArray(BeforeArgs)); + if (!Attrs) + return nullptr; + } + + Node *ReturnType = nullptr; + if (!NameInfo.CtorDtorConversion && NameInfo.EndsWithTemplateArgs) { + ReturnType = getDerived().parseType(); + if (ReturnType == nullptr) + return nullptr; + } + + if (consumeIf('v')) + return make<FunctionEncoding>(ReturnType, Name, NodeArray(), + Attrs, NameInfo.CVQualifiers, + NameInfo.ReferenceQualifier); + + size_t ParamsBegin = Names.size(); + do { + Node *Ty = getDerived().parseType(); + if (Ty == nullptr) + return nullptr; + Names.push_back(Ty); + } while (!IsEndOfEncoding()); + + return make<FunctionEncoding>(ReturnType, Name, + popTrailingNodeArray(ParamsBegin), + Attrs, NameInfo.CVQualifiers, + NameInfo.ReferenceQualifier); +} + +template <class Float> +struct FloatData; + +template <> +struct FloatData<float> +{ + static const size_t mangled_size = 8; + static const size_t max_demangled_size = 24; + static constexpr const char* spec = "%af"; +}; + +template <> +struct FloatData<double> +{ + static const size_t mangled_size = 16; + static const size_t max_demangled_size = 32; + static constexpr const char* spec = "%a"; +}; + +template <> +struct FloatData<long double> +{ +#if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \ + defined(__wasm__) + static const size_t mangled_size = 32; +#elif defined(__arm__) || defined(__mips__) || defined(__hexagon__) + static const size_t mangled_size = 16; +#else + static const size_t mangled_size = 20; // May need to be adjusted to 16 or 24 on other platforms +#endif + static const size_t max_demangled_size = 40; + static constexpr const char *spec = "%LaL"; +}; + +template <typename Alloc, typename Derived> +template <class Float> +Node *AbstractManglingParser<Alloc, Derived>::parseFloatingLiteral() { + const size_t N = FloatData<Float>::mangled_size; + if (numLeft() <= N) + return nullptr; + StringView Data(First, First + N); + for (char C : Data) + if (!std::isxdigit(C)) + return nullptr; + First += N; + if (!consumeIf('E')) + return nullptr; + return make<FloatLiteralImpl<Float>>(Data); +} + +// <seq-id> ::= <0-9A-Z>+ +template <typename Alloc, typename Derived> +bool AbstractManglingParser<Alloc, Derived>::parseSeqId(size_t *Out) { + if (!(look() >= '0' && look() <= '9') && + !(look() >= 'A' && look() <= 'Z')) + return true; + + size_t Id = 0; + while (true) { + if (look() >= '0' && look() <= '9') { + Id *= 36; + Id += static_cast<size_t>(look() - '0'); + } else if (look() >= 'A' && look() <= 'Z') { + Id *= 36; + Id += static_cast<size_t>(look() - 'A') + 10; + } else { + *Out = Id; + return false; + } + ++First; + } +} + +// <substitution> ::= S <seq-id> _ +// ::= S_ +// <substitution> ::= Sa # ::std::allocator +// <substitution> ::= Sb # ::std::basic_string +// <substitution> ::= Ss # ::std::basic_string < char, +// ::std::char_traits<char>, +// ::std::allocator<char> > +// <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> > +// <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> > +// <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> > +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseSubstitution() { + if (!consumeIf('S')) + return nullptr; + + if (std::islower(look())) { + Node *SpecialSub; + switch (look()) { + case 'a': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::allocator); + break; + case 'b': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::basic_string); + break; + case 's': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::string); + break; + case 'i': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::istream); + break; + case 'o': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::ostream); + break; + case 'd': + ++First; + SpecialSub = make<SpecialSubstitution>(SpecialSubKind::iostream); + break; + default: + return nullptr; + } + if (!SpecialSub) + return nullptr; + // Itanium C++ ABI 5.1.2: If a name that would use a built-in <substitution> + // has ABI tags, the tags are appended to the substitution; the result is a + // substitutable component. + Node *WithTags = getDerived().parseAbiTags(SpecialSub); + if (WithTags != SpecialSub) { + Subs.push_back(WithTags); + SpecialSub = WithTags; + } + return SpecialSub; + } + + // ::= S_ + if (consumeIf('_')) { + if (Subs.empty()) + return nullptr; + return Subs[0]; + } + + // ::= S <seq-id> _ + size_t Index = 0; + if (parseSeqId(&Index)) + return nullptr; + ++Index; + if (!consumeIf('_') || Index >= Subs.size()) + return nullptr; + return Subs[Index]; +} + +// <template-param> ::= T_ # first template parameter +// ::= T <parameter-2 non-negative number> _ +// ::= TL <level-1> __ +// ::= TL <level-1> _ <parameter-2 non-negative number> _ +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseTemplateParam() { + if (!consumeIf('T')) + return nullptr; + + size_t Level = 0; + if (consumeIf('L')) { + if (parsePositiveInteger(&Level)) + return nullptr; + ++Level; + if (!consumeIf('_')) + return nullptr; + } + + size_t Index = 0; + if (!consumeIf('_')) { + if (parsePositiveInteger(&Index)) + return nullptr; + ++Index; + if (!consumeIf('_')) + return nullptr; + } + + // If we're in a context where this <template-param> refers to a + // <template-arg> further ahead in the mangled name (currently just conversion + // operator types), then we should only look it up in the right context. + // This can only happen at the outermost level. + if (PermitForwardTemplateReferences && Level == 0) { + Node *ForwardRef = make<ForwardTemplateReference>(Index); + if (!ForwardRef) + return nullptr; + assert(ForwardRef->getKind() == Node::KForwardTemplateReference); + ForwardTemplateRefs.push_back( + static_cast<ForwardTemplateReference *>(ForwardRef)); + return ForwardRef; + } + + if (Level >= TemplateParams.size() || !TemplateParams[Level] || + Index >= TemplateParams[Level]->size()) { + // Itanium ABI 5.1.8: In a generic lambda, uses of auto in the parameter + // list are mangled as the corresponding artificial template type parameter. + if (ParsingLambdaParamsAtLevel == Level && Level <= TemplateParams.size()) { + // This will be popped by the ScopedTemplateParamList in + // parseUnnamedTypeName. + if (Level == TemplateParams.size()) + TemplateParams.push_back(nullptr); + return make<NameType>("auto"); + } + + return nullptr; + } + + return (*TemplateParams[Level])[Index]; +} + +// <template-param-decl> ::= Ty # type parameter +// ::= Tn <type> # non-type parameter +// ::= Tt <template-param-decl>* E # template parameter +// ::= Tp <template-param-decl> # parameter pack +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseTemplateParamDecl() { + auto InventTemplateParamName = [&](TemplateParamKind Kind) { + unsigned Index = NumSyntheticTemplateParameters[(int)Kind]++; + Node *N = make<SyntheticTemplateParamName>(Kind, Index); + if (N) TemplateParams.back()->push_back(N); + return N; + }; + + if (consumeIf("Ty")) { + Node *Name = InventTemplateParamName(TemplateParamKind::Type); + if (!Name) + return nullptr; + return make<TypeTemplateParamDecl>(Name); + } + + if (consumeIf("Tn")) { + Node *Name = InventTemplateParamName(TemplateParamKind::NonType); + if (!Name) + return nullptr; + Node *Type = parseType(); + if (!Type) + return nullptr; + return make<NonTypeTemplateParamDecl>(Name, Type); + } + + if (consumeIf("Tt")) { + Node *Name = InventTemplateParamName(TemplateParamKind::Template); + if (!Name) + return nullptr; + size_t ParamsBegin = Names.size(); + ScopedTemplateParamList TemplateTemplateParamParams(this); + while (!consumeIf("E")) { + Node *P = parseTemplateParamDecl(); + if (!P) + return nullptr; + Names.push_back(P); + } + NodeArray Params = popTrailingNodeArray(ParamsBegin); + return make<TemplateTemplateParamDecl>(Name, Params); + } + + if (consumeIf("Tp")) { + Node *P = parseTemplateParamDecl(); + if (!P) + return nullptr; + return make<TemplateParamPackDecl>(P); + } + + return nullptr; +} + +// <template-arg> ::= <type> # type or template +// ::= X <expression> E # expression +// ::= <expr-primary> # simple expressions +// ::= J <template-arg>* E # argument pack +// ::= LZ <encoding> E # extension +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parseTemplateArg() { + switch (look()) { + case 'X': { + ++First; + Node *Arg = getDerived().parseExpr(); + if (Arg == nullptr || !consumeIf('E')) + return nullptr; + return Arg; + } + case 'J': { + ++First; + size_t ArgsBegin = Names.size(); + while (!consumeIf('E')) { + Node *Arg = getDerived().parseTemplateArg(); + if (Arg == nullptr) + return nullptr; + Names.push_back(Arg); + } + NodeArray Args = popTrailingNodeArray(ArgsBegin); + return make<TemplateArgumentPack>(Args); + } + case 'L': { + // ::= LZ <encoding> E # extension + if (look(1) == 'Z') { + First += 2; + Node *Arg = getDerived().parseEncoding(); + if (Arg == nullptr || !consumeIf('E')) + return nullptr; + return Arg; + } + // ::= <expr-primary> # simple expressions + return getDerived().parseExprPrimary(); + } + default: + return getDerived().parseType(); + } +} + +// <template-args> ::= I <template-arg>* E +// extension, the abi says <template-arg>+ +template <typename Derived, typename Alloc> +Node * +AbstractManglingParser<Derived, Alloc>::parseTemplateArgs(bool TagTemplates) { + if (!consumeIf('I')) + return nullptr; + + // <template-params> refer to the innermost <template-args>. Clear out any + // outer args that we may have inserted into TemplateParams. + if (TagTemplates) { + TemplateParams.clear(); + TemplateParams.push_back(&OuterTemplateParams); + OuterTemplateParams.clear(); + } + + size_t ArgsBegin = Names.size(); + while (!consumeIf('E')) { + if (TagTemplates) { + auto OldParams = std::move(TemplateParams); + Node *Arg = getDerived().parseTemplateArg(); + TemplateParams = std::move(OldParams); + if (Arg == nullptr) + return nullptr; + Names.push_back(Arg); + Node *TableEntry = Arg; + if (Arg->getKind() == Node::KTemplateArgumentPack) { + TableEntry = make<ParameterPack>( + static_cast<TemplateArgumentPack*>(TableEntry)->getElements()); + if (!TableEntry) + return nullptr; + } + TemplateParams.back()->push_back(TableEntry); + } else { + Node *Arg = getDerived().parseTemplateArg(); + if (Arg == nullptr) + return nullptr; + Names.push_back(Arg); + } + } + return make<TemplateArgs>(popTrailingNodeArray(ArgsBegin)); +} + +// <mangled-name> ::= _Z <encoding> +// ::= <type> +// extension ::= ___Z <encoding> _block_invoke +// extension ::= ___Z <encoding> _block_invoke<decimal-digit>+ +// extension ::= ___Z <encoding> _block_invoke_<decimal-digit>+ +template <typename Derived, typename Alloc> +Node *AbstractManglingParser<Derived, Alloc>::parse() { + if (consumeIf("_Z") || consumeIf("__Z")) { + Node *Encoding = getDerived().parseEncoding(); + if (Encoding == nullptr) + return nullptr; + if (look() == '.') { + Encoding = make<DotSuffix>(Encoding, StringView(First, Last)); + First = Last; + } + if (numLeft() != 0) + return nullptr; + return Encoding; + } + + if (consumeIf("___Z") || consumeIf("____Z")) { + Node *Encoding = getDerived().parseEncoding(); + if (Encoding == nullptr || !consumeIf("_block_invoke")) + return nullptr; + bool RequireNumber = consumeIf('_'); + if (parseNumber().empty() && RequireNumber) + return nullptr; + if (look() == '.') + First = Last; + if (numLeft() != 0) + return nullptr; + return make<SpecialName>("invocation function for block in ", Encoding); + } + + Node *Ty = getDerived().parseType(); + if (numLeft() != 0) + return nullptr; + return Ty; +} + +template <typename Alloc> +struct ManglingParser : AbstractManglingParser<ManglingParser<Alloc>, Alloc> { + using AbstractManglingParser<ManglingParser<Alloc>, + Alloc>::AbstractManglingParser; +}; + +DEMANGLE_NAMESPACE_END + +#endif // DEMANGLE_ITANIUMDEMANGLE_H diff --git a/externals/demangle/llvm/Demangle/StringView.h b/externals/demangle/llvm/Demangle/StringView.h new file mode 100644 index 000000000..44d2b18a3 --- /dev/null +++ b/externals/demangle/llvm/Demangle/StringView.h @@ -0,0 +1,127 @@ +//===--- StringView.h -------------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-FileCopyrightText: Part of the LLVM Project +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// FIXME: Use std::string_view instead when we support C++17. +// +//===----------------------------------------------------------------------===// + +#ifndef DEMANGLE_STRINGVIEW_H +#define DEMANGLE_STRINGVIEW_H + +#include "DemangleConfig.h" +#include <algorithm> +#include <cassert> +#include <cstring> + +DEMANGLE_NAMESPACE_BEGIN + +class StringView { + const char *First; + const char *Last; + +public: + static const size_t npos = ~size_t(0); + + template <size_t N> + StringView(const char (&Str)[N]) : First(Str), Last(Str + N - 1) {} + StringView(const char *First_, const char *Last_) + : First(First_), Last(Last_) {} + StringView(const char *First_, size_t Len) + : First(First_), Last(First_ + Len) {} + StringView(const char *Str) : First(Str), Last(Str + std::strlen(Str)) {} + StringView() : First(nullptr), Last(nullptr) {} + + StringView substr(size_t From) const { + return StringView(begin() + From, size() - From); + } + + size_t find(char C, size_t From = 0) const { + size_t FindBegin = std::min(From, size()); + // Avoid calling memchr with nullptr. + if (FindBegin < size()) { + // Just forward to memchr, which is faster than a hand-rolled loop. + if (const void *P = ::memchr(First + FindBegin, C, size() - FindBegin)) + return size_t(static_cast<const char *>(P) - First); + } + return npos; + } + + StringView substr(size_t From, size_t To) const { + if (To >= size()) + To = size() - 1; + if (From >= size()) + From = size() - 1; + return StringView(First + From, First + To); + } + + StringView dropFront(size_t N = 1) const { + if (N >= size()) + N = size(); + return StringView(First + N, Last); + } + + StringView dropBack(size_t N = 1) const { + if (N >= size()) + N = size(); + return StringView(First, Last - N); + } + + char front() const { + assert(!empty()); + return *begin(); + } + + char back() const { + assert(!empty()); + return *(end() - 1); + } + + char popFront() { + assert(!empty()); + return *First++; + } + + bool consumeFront(char C) { + if (!startsWith(C)) + return false; + *this = dropFront(1); + return true; + } + + bool consumeFront(StringView S) { + if (!startsWith(S)) + return false; + *this = dropFront(S.size()); + return true; + } + + bool startsWith(char C) const { return !empty() && *begin() == C; } + + bool startsWith(StringView Str) const { + if (Str.size() > size()) + return false; + return std::equal(Str.begin(), Str.end(), begin()); + } + + const char &operator[](size_t Idx) const { return *(begin() + Idx); } + + const char *begin() const { return First; } + const char *end() const { return Last; } + size_t size() const { return static_cast<size_t>(Last - First); } + bool empty() const { return First == Last; } +}; + +inline bool operator==(const StringView &LHS, const StringView &RHS) { + return LHS.size() == RHS.size() && + std::equal(LHS.begin(), LHS.end(), RHS.begin()); +} + +DEMANGLE_NAMESPACE_END + +#endif diff --git a/externals/demangle/llvm/Demangle/Utility.h b/externals/demangle/llvm/Demangle/Utility.h new file mode 100644 index 000000000..50d05c6b1 --- /dev/null +++ b/externals/demangle/llvm/Demangle/Utility.h @@ -0,0 +1,192 @@ +//===--- Utility.h ----------------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-FileCopyrightText: Part of the LLVM Project +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// Provide some utility classes for use in the demangler(s). +// +//===----------------------------------------------------------------------===// + +#ifndef DEMANGLE_UTILITY_H +#define DEMANGLE_UTILITY_H + +#include "StringView.h" +#include <cstdint> +#include <cstdlib> +#include <cstring> +#include <iterator> +#include <limits> + +DEMANGLE_NAMESPACE_BEGIN + +// Stream that AST nodes write their string representation into after the AST +// has been parsed. +class OutputStream { + char *Buffer; + size_t CurrentPosition; + size_t BufferCapacity; + + // Ensure there is at least n more positions in buffer. + void grow(size_t N) { + if (N + CurrentPosition >= BufferCapacity) { + BufferCapacity *= 2; + if (BufferCapacity < N + CurrentPosition) + BufferCapacity = N + CurrentPosition; + Buffer = static_cast<char *>(std::realloc(Buffer, BufferCapacity)); + if (Buffer == nullptr) + std::terminate(); + } + } + + void writeUnsigned(uint64_t N, bool isNeg = false) { + // Handle special case... + if (N == 0) { + *this << '0'; + return; + } + + char Temp[21]; + char *TempPtr = std::end(Temp); + + while (N) { + *--TempPtr = '0' + char(N % 10); + N /= 10; + } + + // Add negative sign... + if (isNeg) + *--TempPtr = '-'; + this->operator<<(StringView(TempPtr, std::end(Temp))); + } + +public: + OutputStream(char *StartBuf, size_t Size) + : Buffer(StartBuf), CurrentPosition(0), BufferCapacity(Size) {} + OutputStream() = default; + void reset(char *Buffer_, size_t BufferCapacity_) { + CurrentPosition = 0; + Buffer = Buffer_; + BufferCapacity = BufferCapacity_; + } + + /// If a ParameterPackExpansion (or similar type) is encountered, the offset + /// into the pack that we're currently printing. + unsigned CurrentPackIndex = std::numeric_limits<unsigned>::max(); + unsigned CurrentPackMax = std::numeric_limits<unsigned>::max(); + + OutputStream &operator+=(StringView R) { + size_t Size = R.size(); + if (Size == 0) + return *this; + grow(Size); + std::memmove(Buffer + CurrentPosition, R.begin(), Size); + CurrentPosition += Size; + return *this; + } + + OutputStream &operator+=(char C) { + grow(1); + Buffer[CurrentPosition++] = C; + return *this; + } + + OutputStream &operator<<(StringView R) { return (*this += R); } + + OutputStream &operator<<(char C) { return (*this += C); } + + OutputStream &operator<<(long long N) { + if (N < 0) + writeUnsigned(static_cast<unsigned long long>(-N), true); + else + writeUnsigned(static_cast<unsigned long long>(N)); + return *this; + } + + OutputStream &operator<<(unsigned long long N) { + writeUnsigned(N, false); + return *this; + } + + OutputStream &operator<<(long N) { + return this->operator<<(static_cast<long long>(N)); + } + + OutputStream &operator<<(unsigned long N) { + return this->operator<<(static_cast<unsigned long long>(N)); + } + + OutputStream &operator<<(int N) { + return this->operator<<(static_cast<long long>(N)); + } + + OutputStream &operator<<(unsigned int N) { + return this->operator<<(static_cast<unsigned long long>(N)); + } + + size_t getCurrentPosition() const { return CurrentPosition; } + void setCurrentPosition(size_t NewPos) { CurrentPosition = NewPos; } + + char back() const { + return CurrentPosition ? Buffer[CurrentPosition - 1] : '\0'; + } + + bool empty() const { return CurrentPosition == 0; } + + char *getBuffer() { return Buffer; } + char *getBufferEnd() { return Buffer + CurrentPosition - 1; } + size_t getBufferCapacity() { return BufferCapacity; } +}; + +template <class T> class SwapAndRestore { + T &Restore; + T OriginalValue; + bool ShouldRestore = true; + +public: + SwapAndRestore(T &Restore_) : SwapAndRestore(Restore_, Restore_) {} + + SwapAndRestore(T &Restore_, T NewVal) + : Restore(Restore_), OriginalValue(Restore) { + Restore = std::move(NewVal); + } + ~SwapAndRestore() { + if (ShouldRestore) + Restore = std::move(OriginalValue); + } + + void shouldRestore(bool ShouldRestore_) { ShouldRestore = ShouldRestore_; } + + void restoreNow(bool Force) { + if (!Force && !ShouldRestore) + return; + + Restore = std::move(OriginalValue); + ShouldRestore = false; + } + + SwapAndRestore(const SwapAndRestore &) = delete; + SwapAndRestore &operator=(const SwapAndRestore &) = delete; +}; + +inline bool initializeOutputStream(char *Buf, size_t *N, OutputStream &S, + size_t InitSize) { + size_t BufferSize; + if (Buf == nullptr) { + Buf = static_cast<char *>(std::malloc(InitSize)); + if (Buf == nullptr) + return false; + BufferSize = InitSize; + } else + BufferSize = *N; + + S.reset(Buf, BufferSize); + return true; +} + +DEMANGLE_NAMESPACE_END + +#endif |