clang::MacroArgs Class Reference

MacroArgs - An instance of this class captures information about the formal arguments specified to a function-like macro invocation. More...

#include "clang/Lex/MacroArgs.h"

Inheritance diagram for clang::MacroArgs:

Public Member Functions
void	destroy (Preprocessor &PP)
	destroy - Destroy and deallocate the memory for this object.
bool	ArgNeedsPreexpansion (const Token *ArgTok, Preprocessor &PP) const
	ArgNeedsPreexpansion - If we can prove that the argument won't be affected by pre-expansion, return false.
const Token *	getUnexpArgument (unsigned Arg) const
	getUnexpArgument - Return a pointer to the first token of the unexpanded token list for the specified formal.
const std::vector< Token > &	getPreExpArgument (unsigned Arg, Preprocessor &PP)
	getPreExpArgument - Return the pre-expanded form of the specified argument.
unsigned	getNumMacroArguments () const
	getNumMacroArguments - Return the number of arguments the invoked macro expects.
bool	isVarargsElidedUse () const
	isVarargsElidedUse - Return true if this is a C99 style varargs macro invocation and there was no argument specified for the "..." argument.
bool	invokedWithVariadicArgument (const MacroInfo *const MI, Preprocessor &PP)
	Returns true if the macro was defined with a variadic (ellipsis) parameter AND was invoked with at least one token supplied as a variadic argument (after pre-expansion).
MacroArgs *	deallocate ()
	deallocate - This should only be called by the Preprocessor when managing its freelist.

Static Public Member Functions
static MacroArgs *	create (const MacroInfo *MI, ArrayRef< Token > UnexpArgTokens, bool VarargsElided, Preprocessor &PP)
	MacroArgs ctor function - Create a new MacroArgs object with the specified macro and argument info.
static unsigned	getArgLength (const Token *ArgPtr)
	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 Token	StringifyArgument (const Token *ArgToks, Preprocessor &PP, bool Charify, SourceLocation ExpansionLocStart, SourceLocation ExpansionLocEnd)
	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.

Detailed Description

MacroArgs - An instance of this class captures information about the formal arguments specified to a function-like macro invocation.

Definition at line 29 of file MacroArgs.h.

Member Function Documentation

ArgNeedsPreexpansion()

bool MacroArgs::ArgNeedsPreexpansion	(	const Token *	ArgTok,
		Preprocessor &	PP ) const

ArgNeedsPreexpansion - If we can prove that the argument won't be affected by pre-expansion, return false.

Otherwise, conservatively return true.

Definition at line 145 of file MacroArgs.cpp.

References clang::Token::getIdentifierInfo(), and clang::Token::isNot().

create()

MacroArgs * MacroArgs::create ( const MacroInfo * MI, ArrayRef< Token > UnexpArgTokens, bool VarargsElided, Preprocessor & PP )

static

MacroArgs ctor function - Create a new MacroArgs object with the specified macro and argument info.

MacroArgs ctor function - This destroys the vector passed in.

Definition at line 23 of file MacroArgs.cpp.

References clang::MacroInfo::getNumParams(), clang::MacroInfo::isFunctionLike(), and clang::Result.

deallocate()

MacroArgs * MacroArgs::deallocate

(

)

deallocate - This should only be called by the Preprocessor when managing its freelist.

Definition at line 90 of file MacroArgs.cpp.

References Next.

destroy()

void MacroArgs::destroy

(

Preprocessor &

PP

)

destroy - Destroy and deallocate the memory for this object.

Definition at line 77 of file MacroArgs.cpp.

getArgLength()

unsigned MacroArgs::getArgLength ( const Token * ArgPtr )

static

getArgLength - Given a pointer to an expanded or unexpanded argument, return the number of tokens, not counting the EOF, that make up the argument.

Definition at line 107 of file MacroArgs.cpp.

References clang::Token::isNot().

Referenced by getPreExpArgument().

getNumMacroArguments()

unsigned clang::MacroArgs::getNumMacroArguments ( ) const

inline

getNumMacroArguments - Return the number of arguments the invoked macro expects.

Definition at line 95 of file MacroArgs.h.

Referenced by getPreExpArgument(), getUnexpArgument(), and invokedWithVariadicArgument().

getPreExpArgument()

const std::vector< Token > & MacroArgs::getPreExpArgument	(	unsigned	Arg,
		Preprocessor &	PP )

getPreExpArgument - Return the pre-expanded form of the specified argument.

Definition at line 160 of file MacroArgs.cpp.

References getArgLength(), getNumMacroArguments(), getUnexpArgument(), clang::Preprocessor::Lex(), clang::Preprocessor::RemoveTopOfLexerStack(), clang::Result, and Tok.

Referenced by invokedWithVariadicArgument().

getUnexpArgument()

const Token * MacroArgs::getUnexpArgument

(

unsigned

Arg

)

const

getUnexpArgument - Return a pointer to the first token of the unexpanded token list for the specified formal.

getUnexpArgument - Return the unexpanded tokens for the specified formal.

Definition at line 117 of file MacroArgs.cpp.

References getNumMacroArguments(), and clang::Result.

Referenced by getPreExpArgument().

invokedWithVariadicArgument()

bool MacroArgs::invokedWithVariadicArgument	(	const MacroInfo *const	MI,
		Preprocessor &	PP )

Returns true if the macro was defined with a variadic (ellipsis) parameter AND was invoked with at least one token supplied as a variadic argument (after pre-expansion).

#define F(a)  a
#define V(a, ...) __VA_OPT__(a)
F()     <-- returns false on this invocation.
V(,a)   <-- returns true on this invocation.
V(,)    <-- returns false on this invocation.
V(,F()) <-- returns false on this invocation.

Definition at line 135 of file MacroArgs.cpp.

References getNumMacroArguments(), getPreExpArgument(), and clang::MacroInfo::isVariadic().

isVarargsElidedUse()

bool clang::MacroArgs::isVarargsElidedUse ( ) const

inline

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.

Definition at line 102 of file MacroArgs.h.

StringifyArgument()

Token MacroArgs::StringifyArgument ( const Token * ArgToks, Preprocessor & PP, bool Charify, SourceLocation ExpansionLocStart, SourceLocation ExpansionLocEnd )

static

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.

Definition at line 207 of file MacroArgs.cpp.

References clang::Preprocessor::CodeCompleteNaturalLanguage(), clang::Preprocessor::CreateString(), clang::Preprocessor::Diag(), clang::Preprocessor::getSpelling(), clang::Invalid, clang::Token::isNot(), clang::tok::isStringLiteral(), memcpy(), clang::Result, clang::Lexer::Stringify(), and Tok.

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The documentation for this class was generated from the following files:

• include/clang/Lex/MacroArgs.h
• lib/Lex/MacroArgs.cpp