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split the MacroArgs class out of TokenLexer.cpp/h into 

MacroArgs.cpp/h

llvm-svn: 48075
This commit is contained in:
Chris Lattner 2008-03-09 02:55:12 +00:00
parent d5917cef95
commit 7ff66fb91e
6 changed files with 345 additions and 291 deletions
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224
clang/Lex/MacroArgs.cpp Normal file
View File

@ -0,0 +1,224 @@
//===--- TokenLexer.cpp - Lex from a token stream -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the TokenLexer interface.
//
//===----------------------------------------------------------------------===//
#include "MacroArgs.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/Diagnostic.h"
using namespace clang;
/// MacroArgs ctor function - This destroys the vector passed in.
MacroArgs *MacroArgs::create(const MacroInfo *MI,
const Token *UnexpArgTokens,
unsigned NumToks, bool VarargsElided) {
assert(MI->isFunctionLike() &&
"Can't have args for an object-like macro!");
// Allocate memory for the MacroArgs object with the lexer tokens at the end.
MacroArgs *Result = (MacroArgs*)malloc(sizeof(MacroArgs) +
NumToks*sizeof(Token));
// Construct the macroargs object.
new (Result) MacroArgs(NumToks, VarargsElided);
// Copy the actual unexpanded tokens to immediately after the result ptr.
if (NumToks)
memcpy(const_cast<Token*>(Result->getUnexpArgument(0)),
UnexpArgTokens, NumToks*sizeof(Token));
return Result;
}
/// destroy - Destroy and deallocate the memory for this object.
///
void MacroArgs::destroy() {
// Run the dtor to deallocate the vectors.
this->~MacroArgs();
// Release the memory for the object.
free(this);
}
/// getArgLength - Given a pointer to an expanded or unexpanded argument,
/// return the number of tokens, not counting the EOF, that make up the
/// argument.
unsigned MacroArgs::getArgLength(const Token *ArgPtr) {
unsigned NumArgTokens = 0;
for (; ArgPtr->isNot(tok::eof); ++ArgPtr)
++NumArgTokens;
return NumArgTokens;
}
/// getUnexpArgument - Return the unexpanded tokens for the specified formal.
///
const Token *MacroArgs::getUnexpArgument(unsigned Arg) const {
// The unexpanded argument tokens start immediately after the MacroArgs object
// in memory.
const Token *Start = (const Token *)(this+1);
const Token *Result = Start;
// Scan to find Arg.
for (; Arg; ++Result) {
assert(Result < Start+NumUnexpArgTokens && "Invalid arg #");
if (Result->is(tok::eof))
--Arg;
}
return Result;
}
/// ArgNeedsPreexpansion - If we can prove that the argument won't be affected
/// by pre-expansion, return false. Otherwise, conservatively return true.
bool MacroArgs::ArgNeedsPreexpansion(const Token *ArgTok,
Preprocessor &PP) const {
// If there are no identifiers in the argument list, or if the identifiers are
// known to not be macros, pre-expansion won't modify it.
for (; ArgTok->isNot(tok::eof); ++ArgTok)
if (IdentifierInfo *II = ArgTok->getIdentifierInfo()) {
if (II->hasMacroDefinition() && PP.getMacroInfo(II)->isEnabled())
// Return true even though the macro could be a function-like macro
// without a following '(' token.
return true;
}
return false;
}
/// getPreExpArgument - Return the pre-expanded form of the specified
/// argument.
const std::vector<Token> &
MacroArgs::getPreExpArgument(unsigned Arg, Preprocessor &PP) {
assert(Arg < NumUnexpArgTokens && "Invalid argument number!");
// If we have already computed this, return it.
if (PreExpArgTokens.empty())
PreExpArgTokens.resize(NumUnexpArgTokens);
std::vector<Token> &Result = PreExpArgTokens[Arg];
if (!Result.empty()) return Result;
const Token *AT = getUnexpArgument(Arg);
unsigned NumToks = getArgLength(AT)+1; // Include the EOF.
// Otherwise, we have to pre-expand this argument, populating Result. To do
// this, we set up a fake TokenLexer to lex from the unexpanded argument
// list. With this installed, we lex expanded tokens until we hit the EOF
// token at the end of the unexp list.
PP.EnterTokenStream(AT, NumToks);
// Lex all of the macro-expanded tokens into Result.
do {
Result.push_back(Token());
PP.Lex(Result.back());
} while (Result.back().isNot(tok::eof));
// Pop the token stream off the top of the stack. We know that the internal
// pointer inside of it is to the "end" of the token stream, but the stack
// will not otherwise be popped until the next token is lexed. The problem is
// that the token may be lexed sometime after the vector of tokens itself is
// destroyed, which would be badness.
PP.RemoveTopOfLexerStack();
return Result;
}
/// 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.
///
Token MacroArgs::StringifyArgument(const Token *ArgToks,
Preprocessor &PP, bool Charify) {
Token Tok;
Tok.startToken();
Tok.setKind(tok::string_literal);
const Token *ArgTokStart = ArgToks;
// Stringify all the tokens.
std::string Result = "\"";
// FIXME: Optimize this loop to not use std::strings.
bool isFirst = true;
for (; ArgToks->isNot(tok::eof); ++ArgToks) {
const Token &Tok = *ArgToks;
if (!isFirst && (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()))
Result += ' ';
isFirst = false;
// If this is a string or character constant, escape the token as specified
// by 6.10.3.2p2.
if (Tok.is(tok::string_literal) || // "foo"
Tok.is(tok::wide_string_literal) || // L"foo"
Tok.is(tok::char_constant)) { // 'x' and L'x'.
Result += Lexer::Stringify(PP.getSpelling(Tok));
} else {
// Otherwise, just append the token.
Result += PP.getSpelling(Tok);
}
}
// If the last character of the string is a \, and if it isn't escaped, this
// is an invalid string literal, diagnose it as specified in C99.
if (Result[Result.size()-1] == '\\') {
// Count the number of consequtive \ characters. If even, then they are
// just escaped backslashes, otherwise it's an error.
unsigned FirstNonSlash = Result.size()-2;
// Guaranteed to find the starting " if nothing else.
while (Result[FirstNonSlash] == '\\')
--FirstNonSlash;
if ((Result.size()-1-FirstNonSlash) & 1) {
// Diagnose errors for things like: #define F(X) #X / F(\)
PP.Diag(ArgToks[-1], diag::pp_invalid_string_literal);
Result.erase(Result.end()-1); // remove one of the \'s.
}
}
Result += '"';
// If this is the charify operation and the result is not a legal character
// constant, diagnose it.
if (Charify) {
// First step, turn double quotes into single quotes:
Result[0] = '\'';
Result[Result.size()-1] = '\'';
// Check for bogus character.
bool isBad = false;
if (Result.size() == 3) {
isBad = Result[1] == '\''; // ''' is not legal. '\' already fixed above.
} else {
isBad = (Result.size() != 4 || Result[1] != '\\'); // Not '\x'
}
if (isBad) {
PP.Diag(ArgTokStart[0], diag::err_invalid_character_to_charify);
Result = "' '"; // Use something arbitrary, but legal.
}
}
Tok.setLength(Result.size());
Tok.setLocation(PP.CreateString(&Result[0], Result.size()));
return Tok;
}
/// getStringifiedArgument - Compute, cache, and return the specified argument
/// that has been 'stringified' as required by the # operator.
const Token &MacroArgs::getStringifiedArgument(unsigned ArgNo,
Preprocessor &PP) {
assert(ArgNo < NumUnexpArgTokens && "Invalid argument number!");
if (StringifiedArgs.empty()) {
StringifiedArgs.resize(getNumArguments());
memset(&StringifiedArgs[0], 0,
sizeof(StringifiedArgs[0])*getNumArguments());
}
if (StringifiedArgs[ArgNo].isNot(tok::string_literal))
StringifiedArgs[ArgNo] = StringifyArgument(getUnexpArgument(ArgNo), PP);
return StringifiedArgs[ArgNo];
}

109
clang/Lex/MacroArgs.h Normal file
View File

@ -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

1
clang/Lex/Preprocessor.cpp
View File

@ -26,6 +26,7 @@
//===----------------------------------------------------------------------===//
#include "clang/Lex/Preprocessor.h"
#include "MacroArgs.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/PPCallbacks.h"

216
clang/Lex/TokenLexer.cpp
View File

@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "clang/Lex/TokenLexer.h"
#include "MacroArgs.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/SourceManager.h"
@ -19,218 +20,6 @@
#include "llvm/ADT/SmallVector.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// MacroArgs Implementation
//===----------------------------------------------------------------------===//
/// MacroArgs ctor function - This destroys the vector passed in.
MacroArgs *MacroArgs::create(const MacroInfo *MI,
const Token *UnexpArgTokens,
unsigned NumToks, bool VarargsElided) {
assert(MI->isFunctionLike() &&
"Can't have args for an object-like macro!");
// Allocate memory for the MacroArgs object with the lexer tokens at the end.
MacroArgs *Result = (MacroArgs*)malloc(sizeof(MacroArgs) +
NumToks*sizeof(Token));
// Construct the macroargs object.
new (Result) MacroArgs(NumToks, VarargsElided);
// Copy the actual unexpanded tokens to immediately after the result ptr.
if (NumToks)
memcpy(const_cast<Token*>(Result->getUnexpArgument(0)),
UnexpArgTokens, NumToks*sizeof(Token));
return Result;
}
/// destroy - Destroy and deallocate the memory for this object.
///
void MacroArgs::destroy() {
// Run the dtor to deallocate the vectors.
this->~MacroArgs();
// Release the memory for the object.
free(this);
}
/// getArgLength - Given a pointer to an expanded or unexpanded argument,
/// return the number of tokens, not counting the EOF, that make up the
/// argument.
unsigned MacroArgs::getArgLength(const Token *ArgPtr) {
unsigned NumArgTokens = 0;
for (; ArgPtr->isNot(tok::eof); ++ArgPtr)
++NumArgTokens;
return NumArgTokens;
}
/// getUnexpArgument - Return the unexpanded tokens for the specified formal.
///
const Token *MacroArgs::getUnexpArgument(unsigned Arg) const {
// The unexpanded argument tokens start immediately after the MacroArgs object
// in memory.
const Token *Start = (const Token *)(this+1);
const Token *Result = Start;
// Scan to find Arg.
for (; Arg; ++Result) {
assert(Result < Start+NumUnexpArgTokens && "Invalid arg #");
if (Result->is(tok::eof))
--Arg;
}
return Result;
}
/// ArgNeedsPreexpansion - If we can prove that the argument won't be affected
/// by pre-expansion, return false. Otherwise, conservatively return true.
bool MacroArgs::ArgNeedsPreexpansion(const Token *ArgTok,
Preprocessor &PP) const {
// If there are no identifiers in the argument list, or if the identifiers are
// known to not be macros, pre-expansion won't modify it.
for (; ArgTok->isNot(tok::eof); ++ArgTok)
if (IdentifierInfo *II = ArgTok->getIdentifierInfo()) {
if (II->hasMacroDefinition() && PP.getMacroInfo(II)->isEnabled())
// Return true even though the macro could be a function-like macro
// without a following '(' token.
return true;
}
return false;
}
/// getPreExpArgument - Return the pre-expanded form of the specified
/// argument.
const std::vector<Token> &
MacroArgs::getPreExpArgument(unsigned Arg, Preprocessor &PP) {
assert(Arg < NumUnexpArgTokens && "Invalid argument number!");
// If we have already computed this, return it.
if (PreExpArgTokens.empty())
PreExpArgTokens.resize(NumUnexpArgTokens);
std::vector<Token> &Result = PreExpArgTokens[Arg];
if (!Result.empty()) return Result;
const Token *AT = getUnexpArgument(Arg);
unsigned NumToks = getArgLength(AT)+1; // Include the EOF.
// Otherwise, we have to pre-expand this argument, populating Result. To do
// this, we set up a fake TokenLexer to lex from the unexpanded argument
// list. With this installed, we lex expanded tokens until we hit the EOF
// token at the end of the unexp list.
PP.EnterTokenStream(AT, NumToks);
// Lex all of the macro-expanded tokens into Result.
do {
Result.push_back(Token());
PP.Lex(Result.back());
} while (Result.back().isNot(tok::eof));
// Pop the token stream off the top of the stack. We know that the internal
// pointer inside of it is to the "end" of the token stream, but the stack
// will not otherwise be popped until the next token is lexed. The problem is
// that the token may be lexed sometime after the vector of tokens itself is
// destroyed, which would be badness.
PP.RemoveTopOfLexerStack();
return Result;
}
/// 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.
///
static Token StringifyArgument(const Token *ArgToks,
Preprocessor &PP, bool Charify = false) {
Token Tok;
Tok.startToken();
Tok.setKind(tok::string_literal);
const Token *ArgTokStart = ArgToks;
// Stringify all the tokens.
std::string Result = "\"";
// FIXME: Optimize this loop to not use std::strings.
bool isFirst = true;
for (; ArgToks->isNot(tok::eof); ++ArgToks) {
const Token &Tok = *ArgToks;
if (!isFirst && (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()))
Result += ' ';
isFirst = false;
// If this is a string or character constant, escape the token as specified
// by 6.10.3.2p2.
if (Tok.is(tok::string_literal) || // "foo"
Tok.is(tok::wide_string_literal) || // L"foo"
Tok.is(tok::char_constant)) { // 'x' and L'x'.
Result += Lexer::Stringify(PP.getSpelling(Tok));
} else {
// Otherwise, just append the token.
Result += PP.getSpelling(Tok);
}
}
// If the last character of the string is a \, and if it isn't escaped, this
// is an invalid string literal, diagnose it as specified in C99.
if (Result[Result.size()-1] == '\\') {
// Count the number of consequtive \ characters. If even, then they are
// just escaped backslashes, otherwise it's an error.
unsigned FirstNonSlash = Result.size()-2;
// Guaranteed to find the starting " if nothing else.
while (Result[FirstNonSlash] == '\\')
--FirstNonSlash;
if ((Result.size()-1-FirstNonSlash) & 1) {
// Diagnose errors for things like: #define F(X) #X / F(\)
PP.Diag(ArgToks[-1], diag::pp_invalid_string_literal);
Result.erase(Result.end()-1); // remove one of the \'s.
}
}
Result += '"';
// If this is the charify operation and the result is not a legal character
// constant, diagnose it.
if (Charify) {
// First step, turn double quotes into single quotes:
Result[0] = '\'';
Result[Result.size()-1] = '\'';
// Check for bogus character.
bool isBad = false;
if (Result.size() == 3) {
isBad = Result[1] == '\''; // ''' is not legal. '\' already fixed above.
} else {
isBad = (Result.size() != 4 || Result[1] != '\\'); // Not '\x'
}
if (isBad) {
PP.Diag(ArgTokStart[0], diag::err_invalid_character_to_charify);
Result = "' '"; // Use something arbitrary, but legal.
}
}
Tok.setLength(Result.size());
Tok.setLocation(PP.CreateString(&Result[0], Result.size()));
return Tok;
}
/// getStringifiedArgument - Compute, cache, and return the specified argument
/// that has been 'stringified' as required by the # operator.
const Token &MacroArgs::getStringifiedArgument(unsigned ArgNo,
Preprocessor &PP) {
assert(ArgNo < NumUnexpArgTokens && "Invalid argument number!");
if (StringifiedArgs.empty()) {
StringifiedArgs.resize(getNumArguments());
memset(&StringifiedArgs[0], 0,
sizeof(StringifiedArgs[0])*getNumArguments());
}
if (StringifiedArgs[ArgNo].isNot(tok::string_literal))
StringifiedArgs[ArgNo] = StringifyArgument(getUnexpArgument(ArgNo), PP);
return StringifiedArgs[ArgNo];
}
//===----------------------------------------------------------------------===//
// TokenLexer Implementation
//===----------------------------------------------------------------------===//
/// Create a TokenLexer for the specified macro with the specified actual
/// arguments. Note that this ctor takes ownership of the ActualArgs pointer.
@ -329,7 +118,8 @@ void TokenLexer::ExpandFunctionArguments() {
Res = ActualArgs->getStringifiedArgument(ArgNo, PP);
else {
// 'charify': don't bother caching these.
Res = StringifyArgument(ActualArgs->getUnexpArgument(ArgNo), PP, true);
Res = MacroArgs::StringifyArgument(ActualArgs->getUnexpArgument(ArgNo),
PP, true);
}
// The stringified/charified string leading space flag gets set to match

6
clang/clang.xcodeproj/project.pbxproj
View File

@ -103,6 +103,7 @@
DE75EDF10B06880E0020CF81 /* Type.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE75EDF00B06880E0020CF81 /* Type.cpp */; };
DE85CD4B0D8378320070E26E /* Directives.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CD4A0D8378320070E26E /* Directives.cpp */; };
DE85CD810D8380B10070E26E /* TokenLexer.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CD800D8380B10070E26E /* TokenLexer.cpp */; };
DE85CDA30D8383B20070E26E /* MacroArgs.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE85CDA20D8383B20070E26E /* MacroArgs.cpp */; };
DE928B130C05659200231DA4 /* ModuleBuilder.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE928B120C05659200231DA4 /* ModuleBuilder.cpp */; };
DE928B200C0565B000231DA4 /* ModuleBuilder.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE928B1F0C0565B000231DA4 /* ModuleBuilder.h */; };
DE928B7D0C0A615100231DA4 /* CodeGenModule.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = DE928B7C0C0A615100231DA4 /* CodeGenModule.h */; };
@ -365,6 +366,8 @@
DE85CD4A0D8378320070E26E /* Directives.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Directives.cpp; sourceTree = "<group>"; };
DE85CD800D8380B10070E26E /* TokenLexer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = TokenLexer.cpp; sourceTree = "<group>"; };
DE85CD840D8380F20070E26E /* TokenLexer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TokenLexer.h; sourceTree = "<group>"; };
DE85CD9E0D8382DD0070E26E /* MacroArgs.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MacroArgs.h; sourceTree = "<group>"; };
DE85CDA20D8383B20070E26E /* MacroArgs.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MacroArgs.cpp; sourceTree = "<group>"; };
DE928B120C05659200231DA4 /* ModuleBuilder.cpp */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.cpp.cpp; name = ModuleBuilder.cpp; path = CodeGen/ModuleBuilder.cpp; sourceTree = "<group>"; };
DE928B1F0C0565B000231DA4 /* ModuleBuilder.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = ModuleBuilder.h; path = clang/CodeGen/ModuleBuilder.h; sourceTree = "<group>"; };
DE928B7C0C0A615100231DA4 /* CodeGenModule.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; name = CodeGenModule.h; path = CodeGen/CodeGenModule.h; sourceTree = "<group>"; };
@ -816,6 +819,8 @@
DE344B530AE5E46C00DBC861 /* HeaderSearch.cpp */,
DED7D79E0A5242E6003AD0FB /* Lexer.cpp */,
1A869AA70BA21ABA008DA07A /* LiteralSupport.cpp */,
DE85CD9E0D8382DD0070E26E /* MacroArgs.h */,
DE85CDA20D8383B20070E26E /* MacroArgs.cpp */,
DED7D7A00A5242E6003AD0FB /* MacroInfo.cpp */,
DED7D7A20A5242E6003AD0FB /* PPExpressions.cpp */,
DED7D7A30A5242E6003AD0FB /* Pragma.cpp */,
@ -983,6 +988,7 @@
35D55B280D81D8C60092E734 /* CFRefCount.cpp in Sources */,
DE85CD4B0D8378320070E26E /* Directives.cpp in Sources */,
DE85CD810D8380B10070E26E /* TokenLexer.cpp in Sources */,
DE85CDA30D8383B20070E26E /* MacroArgs.cpp in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};

80
clang/include/clang/Lex/TokenLexer.h
View File

@ -7,7 +7,7 @@
//
//===----------------------------------------------------------------------===//
//
// This file defines the TokenLexer and MacroArgs interfaces.
// This file defines the TokenLexer interface.
//
//===----------------------------------------------------------------------===//
@ -15,88 +15,12 @@
#define LLVM_CLANG_TOKENLEXER_H
#include "clang/Basic/SourceLocation.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; }
};
class MacroArgs;
/// TokenLexer - This implements a lexer that returns token from a macro body
/// or token stream instead of lexing from a character buffer. This is used for