split the MacroArgs class out of TokenLexer.cpp/h into
MacroArgs.cpp/h
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48075 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Lex/MacroArgs.h b/Lex/MacroArgs.h
new file mode 100644
index 0000000..4b22fa1
--- /dev/null
+++ b/Lex/MacroArgs.h
@@ -0,0 +1,109 @@
+//===--- 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 <vector>
+
+namespace clang {
+ class MacroInfo;
+ class Preprocessor;
+ class Token;
+
+/// 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;
+
+ /// 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<std::vector<Token> > 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<Token> StringifiedArgs;
+
+ /// 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;
+
+ MacroArgs(unsigned NumToks, bool varargsElided)
+ : NumUnexpArgTokens(NumToks), VarargsElided(varargsElided) {}
+ ~MacroArgs() {}
+public:
+ /// MacroArgs ctor function - Create a new MacroArgs object with the specified
+ /// macro and argument info.
+ static MacroArgs *create(const MacroInfo *MI,
+ const Token *UnexpArgTokens,
+ unsigned NumArgTokens, bool VarargsElided);
+
+ /// destroy - Destroy and deallocate the memory for this object.
+ ///
+ void destroy();
+
+ /// 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<Token> &
+ getPreExpArgument(unsigned Arg, 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);
+
+ /// 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 = false);
+};
+
+} // end namespace clang
+
+#endif