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+// Copyright (C) 2008 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+
+/**
+ * @fileoverview
+ * Registers a language handler for Lua.
+ *
+ *
+ * To use, include prettify.js and this file in your HTML page.
+ * Then put your code in an HTML tag like
+ * <pre class="prettyprint lang-lua">(my Lua code)</pre>
+ *
+ *
+ * I used http://www.lua.org/manual/5.1/manual.html#2.1
+ * Because of the long-bracket concept used in strings and comments, Lua does
+ * not have a regular lexical grammar, but luckily it fits within the space
+ * of irregular grammars supported by javascript regular expressions.
+ *
+ * @author mikesamuel@gmail.com
+ */
+
+PR['registerLangHandler'](
+ PR['createSimpleLexer'](
+ [
+ // Whitespace
+ [PR['PR_PLAIN'], /^[\t\n\r \xA0]+/, null, '\t\n\r \xA0'],
+ // A double or single quoted, possibly multi-line, string.
+ [PR['PR_STRING'], /^(?:\"(?:[^\"\\]|\\[\s\S])*(?:\"|$)|\'(?:[^\'\\]|\\[\s\S])*(?:\'|$))/, null, '"\'']
+ ],
+ [
+ // A comment is either a line comment that starts with two dashes, or
+ // two dashes preceding a long bracketed block.
+ [PR['PR_COMMENT'], /^--(?:\[(=*)\[[\s\S]*?(?:\]\1\]|$)|[^\r\n]*)/],
+ // A long bracketed block not preceded by -- is a string.
+ [PR['PR_STRING'], /^\[(=*)\[[\s\S]*?(?:\]\1\]|$)/],
+ [PR['PR_KEYWORD'], /^(?:and|break|do|else|elseif|end|false|for|function|if|in|local|nil|not|or|repeat|return|then|true|until|while)\b/, null],
+ // A number is a hex integer literal, a decimal real literal, or in
+ // scientific notation.
+ [PR['PR_LITERAL'],
+ /^[+-]?(?:0x[\da-f]+|(?:(?:\.\d+|\d+(?:\.\d*)?)(?:e[+\-]?\d+)?))/i],
+ // An identifier
+ [PR['PR_PLAIN'], /^[a-z_]\w*/i],
+ // A run of punctuation
+ [PR['PR_PUNCTUATION'], /^[^\w\t\n\r \xA0][^\w\t\n\r \xA0\"\'\-\+=]*/]
+ ]),
+ ['lua']);