From e99a14862841841d74be8d0ea9426c2d23546b5e Mon Sep 17 00:00:00 2001 From: Lioncash Date: Thu, 7 Mar 2019 16:32:10 -0500 Subject: common/bit_field: Make BitField trivially copyable This makes the class much more flexible and doesn't make performing copies with classes that contain a bitfield member a pain. Given BitField instances are only intended to be used within unions, the fact the full storage value would be copied isn't a big concern (only sizeof(union_type) would be copied anyways). While we're at it, provide defaulted move constructors for consistency. --- src/common/bit_field.h | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/src/common/bit_field.h b/src/common/bit_field.h index 21e07925d..7433c39ba 100644 --- a/src/common/bit_field.h +++ b/src/common/bit_field.h @@ -111,12 +111,6 @@ template struct BitField { private: - // We hide the copy assigment operator here, because the default copy - // assignment would copy the full storage value, rather than just the bits - // relevant to this particular bit field. - // We don't delete it because we want BitField to be trivially copyable. - constexpr BitField& operator=(const BitField&) = default; - // UnderlyingType is T for non-enum types and the underlying type of T if // T is an enumeration. Note that T is wrapped within an enable_if in the // former case to workaround compile errors which arise when using @@ -163,9 +157,13 @@ public: BitField(T val) = delete; BitField& operator=(T val) = delete; - // Force default constructor to be created - // so that we can use this within unions - constexpr BitField() = default; + constexpr BitField() noexcept = default; + + constexpr BitField(const BitField&) noexcept = default; + constexpr BitField& operator=(const BitField&) noexcept = default; + + constexpr BitField(BitField&&) noexcept = default; + constexpr BitField& operator=(BitField&&) noexcept = default; constexpr FORCE_INLINE operator T() const { return Value(); -- cgit v1.2.3