PPExpressions.cpp File Reference

#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TokenKinds.h"
#include "clang/Lex/CodeCompletionHandler.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Lex/LiteralSupport.h"
#include "clang/Lex/MacroInfo.h"
#include "clang/Lex/PPCallbacks.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/Token.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/SaveAndRestore.h"
#include <cassert>

Go to the source code of this file.

Classes
struct	DefinedTracker
	DefinedTracker - This struct is used while parsing expressions to keep track of whether !defined(X) has been seen. More...

Functions
static bool	EvaluateDirectiveSubExpr (PPValue &LHS, unsigned MinPrec, Token &PeekTok, bool ValueLive, bool &IncludedUndefinedIds, Preprocessor &PP)
	EvaluateDirectiveSubExpr - Evaluate the subexpression whose first token is PeekTok, and whose precedence is PeekPrec.
static bool	EvaluateDefined (PPValue &Result, Token &PeekTok, DefinedTracker &DT, bool ValueLive, Preprocessor &PP)
	EvaluateDefined - Process a 'defined(sym)' expression.
static bool	EvaluateValue (PPValue &Result, Token &PeekTok, DefinedTracker &DT, bool ValueLive, Preprocessor &PP)
	EvaluateValue - Evaluate the token PeekTok (and any others needed) and return the computed value in Result.
static unsigned	getPrecedence (tok::TokenKind Kind)
	getPrecedence - Return the precedence of the specified binary operator token.
static void	diagnoseUnexpectedOperator (Preprocessor &PP, PPValue &LHS, Token &Tok)

Function Documentation

diagnoseUnexpectedOperator()

static void diagnoseUnexpectedOperator ( Preprocessor &  PP, PPValue &  LHS, Token &  Tok  )

static

Definition at line 576 of file PPExpressions.cpp.

References clang::Preprocessor::Diag(), clang::Token::getLocation(), and clang::Token::is().

Referenced by EvaluateDirectiveSubExpr().

EvaluateDefined()

static bool EvaluateDefined ( PPValue &  Result, Token &  PeekTok, DefinedTracker &  DT, bool  ValueLive, Preprocessor &  PP  )

static

EvaluateDefined - Process a 'defined(sym)' expression.

Definition at line 102 of file PPExpressions.cpp.

References clang::Preprocessor::CheckMacroName(), clang::CodeCompletionHandler::CodeCompleteMacroName(), DefinedTracker::DefinedMacro, clang::Preprocessor::Diag(), clang::Preprocessor::emitMacroExpansionWarnings(), clang::Preprocessor::getCodeCompletionHandler(), clang::SrcMgr::SLocEntry::getExpansion(), clang::SourceManager::getFileID(), clang::Token::getIdentifierInfo(), clang::Token::getLocation(), clang::Preprocessor::getMacroDefinition(), clang::IdentifierInfo::getName(), clang::Preprocessor::getPPCallbacks(), clang::SourceManager::getSLocEntry(), clang::Preprocessor::getSourceManager(), DefinedTracker::IncludedUndefinedIds, clang::Token::is(), clang::SrcMgr::ExpansionInfo::isFunctionMacroExpansion(), clang::SourceLocation::isMacroID(), clang::Token::isNot(), clang::SourceLocation::isValid(), clang::Preprocessor::LexNonComment(), clang::Preprocessor::LexUnexpandedNonComment(), clang::Preprocessor::markMacroAsUsed(), clang::MU_Other, clang::Preprocessor::setCodeCompletionReached(), DefinedTracker::State, and DefinedTracker::TheMacro.

Referenced by EvaluateValue().

EvaluateDirectiveSubExpr()

static bool EvaluateDirectiveSubExpr ( PPValue &  LHS, unsigned  MinPrec, Token &  PeekTok, bool  ValueLive, bool &  IncludedUndefinedIds, Preprocessor &  PP  )

static

EvaluateDirectiveSubExpr - Evaluate the subexpression whose first token is PeekTok, and whose precedence is PeekPrec.

This returns the result in LHS.

If ValueLive is false, then this value is being evaluated in a context where the result is not used. As such, avoid diagnostics that relate to evaluation, such as division by zero warnings.

Definition at line 592 of file PPExpressions.cpp.

References clang::Preprocessor::Diag(), diagnoseUnexpectedOperator(), EvaluateDirectiveSubExpr(), EvaluateValue(), clang::Token::getKind(), clang::Preprocessor::getLangOpts(), clang::Token::getLocation(), getPrecedence(), DefinedTracker::IncludedUndefinedIds, clang::Token::isNot(), clang::Preprocessor::LexNonComment(), and toString().

Referenced by EvaluateDirectiveSubExpr(), and EvaluateValue().

EvaluateValue()

static bool EvaluateValue ( PPValue &  Result, Token &  PeekTok, DefinedTracker &  DT, bool  ValueLive, Preprocessor &  PP  )

static

EvaluateValue - Evaluate the token PeekTok (and any others needed) and return the computed value in Result.

Return true if there was an error parsing. This function also returns information about the form of the expression in DT. See above for information on what DT means.

If ValueLive is false, then this value is being evaluated in a context where the result is not used. As such, avoid diagnostics that relate to evaluation.

Definition at line 233 of file PPExpressions.cpp.

References clang::CodeCompletionHandler::CodeCompletePreprocessorExpression(), DefinedTracker::DefinedMacro, clang::Preprocessor::Diag(), EvaluateDefined(), EvaluateDirectiveSubExpr(), EvaluateValue(), clang::TargetInfo::getChar16Width(), clang::TargetInfo::getChar32Width(), clang::TargetInfo::getCharWidth(), clang::Preprocessor::getCodeCompletionHandler(), clang::DiagnosticsEngine::getDiagnosticOptions(), clang::Preprocessor::getDiagnostics(), clang::Token::getIdentifierInfo(), clang::TargetInfo::getIntWidth(), clang::Token::getKind(), clang::Preprocessor::getLangOpts(), clang::Token::getLocation(), clang::IdentifierInfo::getName(), clang::Preprocessor::getSourceManager(), clang::Preprocessor::getSpelling(), clang::Preprocessor::getTargetInfo(), clang::TargetInfo::getWCharType(), clang::TargetInfo::getWCharWidth(), clang::Token::hasUDSuffix(), DefinedTracker::IncludedUndefinedIds, clang::Token::is(), clang::IdentifierInfo::isCPlusPlusOperatorKeyword(), clang::DiagnosticsEngine::isIgnored(), clang::Token::isNot(), clang::IdentifierInfo::isStr(), clang::TargetInfo::isTypeSigned(), clang::Preprocessor::LexNonComment(), Loc, DefinedTracker::NotDefinedMacro, clang::Preprocessor::setCodeCompletionReached(), DefinedTracker::State, clang::DiagnosticOptions::UndefPrefixes, and DefinedTracker::Unknown.

Referenced by EvaluateDirectiveSubExpr(), and EvaluateValue().

getPrecedence()

static unsigned getPrecedence ( tok::TokenKind  Kind )

static

getPrecedence - Return the precedence of the specified binary operator token.

This returns: ~0 - Invalid token. 14 -> 3 - various operators. 0 - 'eod' or ')'

Definition at line 547 of file PPExpressions.cpp.

Referenced by EvaluateDirectiveSubExpr().