From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/lib/Lex/MacroArgs.h | 125 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 clang/lib/Lex/MacroArgs.h (limited to 'clang/lib/Lex/MacroArgs.h') diff --git a/clang/lib/Lex/MacroArgs.h b/clang/lib/Lex/MacroArgs.h new file mode 100644 index 0000000..cf86d71 --- /dev/null +++ b/clang/lib/Lex/MacroArgs.h @@ -0,0 +1,125 @@ +//===--- MacroArgs.h - Formal argument info for Macros ----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines the MacroArgs interface. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_MACROARGS_H +#define LLVM_CLANG_MACROARGS_H + +#include "llvm/ADT/ArrayRef.h" + +#include + +namespace clang { + class MacroInfo; + class Preprocessor; + class Token; + class SourceLocation; + +/// MacroArgs - An instance of this class captures information about +/// the formal arguments specified to a function-like macro invocation. +class MacroArgs { + /// NumUnexpArgTokens - The number of raw, unexpanded tokens for the + /// arguments. All of the actual argument tokens are allocated immediately + /// after the MacroArgs object in memory. This is all of the arguments + /// concatenated together, with 'EOF' markers at the end of each argument. + unsigned NumUnexpArgTokens; + + /// VarargsElided - True if this is a C99 style varargs macro invocation and + /// there was no argument specified for the "..." argument. If the argument + /// was specified (even empty) or this isn't a C99 style varargs function, or + /// if in strict mode and the C99 varargs macro had only a ... argument, this + /// is false. + bool VarargsElided; + + /// PreExpArgTokens - Pre-expanded tokens for arguments that need them. Empty + /// if not yet computed. This includes the EOF marker at the end of the + /// stream. + std::vector > PreExpArgTokens; + + /// StringifiedArgs - This contains arguments in 'stringified' form. If the + /// stringified form of an argument has not yet been computed, this is empty. + std::vector StringifiedArgs; + + /// ArgCache - This is a linked list of MacroArgs objects that the + /// Preprocessor owns which we use to avoid thrashing malloc/free. + MacroArgs *ArgCache; + + MacroArgs(unsigned NumToks, bool varargsElided) + : NumUnexpArgTokens(NumToks), VarargsElided(varargsElided), ArgCache(0) {} + ~MacroArgs() {} +public: + /// MacroArgs ctor function - Create a new MacroArgs object with the specified + /// macro and argument info. + static MacroArgs *create(const MacroInfo *MI, + llvm::ArrayRef UnexpArgTokens, + bool VarargsElided, Preprocessor &PP); + + /// destroy - Destroy and deallocate the memory for this object. + /// + void destroy(Preprocessor &PP); + + /// ArgNeedsPreexpansion - If we can prove that the argument won't be affected + /// by pre-expansion, return false. Otherwise, conservatively return true. + bool ArgNeedsPreexpansion(const Token *ArgTok, Preprocessor &PP) const; + + /// getUnexpArgument - Return a pointer to the first token of the unexpanded + /// token list for the specified formal. + /// + const Token *getUnexpArgument(unsigned Arg) const; + + /// getArgLength - Given a pointer to an expanded or unexpanded argument, + /// return the number of tokens, not counting the EOF, that make up the + /// argument. + static unsigned getArgLength(const Token *ArgPtr); + + /// getPreExpArgument - Return the pre-expanded form of the specified + /// argument. + const std::vector & + getPreExpArgument(unsigned Arg, const MacroInfo *MI, Preprocessor &PP); + + /// getStringifiedArgument - Compute, cache, and return the specified argument + /// that has been 'stringified' as required by the # operator. + const Token &getStringifiedArgument(unsigned ArgNo, Preprocessor &PP, + SourceLocation ExpansionLocStart, + SourceLocation ExpansionLocEnd); + + /// getNumArguments - Return the number of arguments passed into this macro + /// invocation. + unsigned getNumArguments() const { return NumUnexpArgTokens; } + + + /// isVarargsElidedUse - Return true if this is a C99 style varargs macro + /// invocation and there was no argument specified for the "..." argument. If + /// the argument was specified (even empty) or this isn't a C99 style varargs + /// function, or if in strict mode and the C99 varargs macro had only a ... + /// argument, this returns false. + bool isVarargsElidedUse() const { return VarargsElided; } + + /// StringifyArgument - Implement C99 6.10.3.2p2, converting a sequence of + /// tokens into the literal string token that should be produced by the C # + /// preprocessor operator. If Charify is true, then it should be turned into + /// a character literal for the Microsoft charize (#@) extension. + /// + static Token StringifyArgument(const Token *ArgToks, + Preprocessor &PP, bool Charify, + SourceLocation ExpansionLocStart, + SourceLocation ExpansionLocEnd); + + + /// deallocate - This should only be called by the Preprocessor when managing + /// its freelist. + MacroArgs *deallocate(); +}; + +} // end namespace clang + +#endif -- cgit v1.2.3