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clang: clang::Parser Class Reference

Parser - This implements a parser for the C family of languages. More...

#include "clang/Parse/Parser.h"

Parser - This implements a parser for the C family of languages.

After parsing units of the grammar, productions are invoked to handle whatever has been read.

Definition at line 58 of file Parser.h.

A SmallVector of statements.

Definition at line 521 of file Parser.h.

Control flags for SkipUntil functions.

Stop skipping at semicolon.

Stop skipping at specified token, but don't skip the token itself.

Stop at code completion.

Definition at line 1272 of file Parser.h.

TypeCastState - State whether an expression is or may be a type cast.

Definition at line 1841 of file Parser.h.

ConsumeToken - Consume the current 'peek token' and lex the next one.

This does not work with special tokens: string literals, code completion, annotation tokens and balanced tokens must be handled using the specific consume methods. Returns the location of the consumed token.

Definition at line 548 of file Parser.h.

References clang::Token::getLocation(), and clang::Preprocessor::Lex().

Referenced by ConsumeAnyToken(), Initialize(), clang::Parser::ConditionDeclarationOrInitStatementState::markNotExpression(), ParseConstraintLogicalAndExpression(), ParseConstraintLogicalOrExpression(), parseMapperModifier(), parseMapTypeModifiers(), ParseMSAsmIdentifier(), ParseOpenMPReservedLocator(), ParseOpenMPVarList(), ParseUnqualifiedId(), SkipMalformedDecl(), SkipUntil(), TryAnnotateTypeOrScopeToken(), and TryAnnotateTypeOrScopeTokenAfterScopeSpec().

Definition at line 81 of file Parser.cpp.

References Loc, and clang::DiagnosticsEngine::Report().

Referenced by Diag(), diagnoseExpectedAttributeSubjectSubRule(), diagnoseUnknownAttributeSubjectSubRule(), ParseConstraintLogicalAndExpression(), ParseFirstTopLevelDecl(), parseMapperModifier(), parseMapTypeModifiers(), ParseOpenMPReservedLocator(), ParseOpenMPVarList(), ParseUnqualifiedId(), TryAnnotateTypeOrScopeToken(), and TryAnnotateTypeOrScopeTokenAfterScopeSpec().

Definition at line 502 of file Parser.h.

References clang::Sema::getCurScope().

Referenced by EnterScope(), ExitScope(), Initialize(), ParseAssignmentExpression(), ParseConditionalExpression(), ParseConstraintLogicalAndExpression(), ParseConstraintLogicalOrExpression(), ParseUnqualifiedId(), clang::Parser::ReenterClassScopeRAII::ReenterClassScopeRAII(), TryAnnotateTypeOrScopeToken(), TryAnnotateTypeOrScopeTokenAfterScopeSpec(), ~Parser(), and clang::Parser::ReenterClassScopeRAII::~ReenterClassScopeRAII().

Definition at line 495 of file Parser.h.

References clang::Preprocessor::getLangOpts().

Referenced by clang::BalancedDelimiterTracker::expectAndConsume(), Initialize(), MightBeCXXScopeToken(), ParseFirstTopLevelDecl(), parseMapperModifier(), parseMapTypeModifiers(), ParseMSAsmIdentifier(), ParseOpenMPVarList(), ParseTopLevelDecl(), ParseUnqualifiedId(), TryAnnotateCXXScopeToken(), TryAnnotateTypeOrScopeToken(), and TryAnnotateTypeOrScopeTokenAfterScopeSpec().

Initialize - Warm up the parser.

Definition at line 490 of file Parser.cpp.

References clang::Sema::ActOnTranslationUnitScope(), ConsumeToken(), clang::Scope::DeclScope, EnterScope(), clang::IdentifierTable::get(), getCurScope(), clang::Preprocessor::getIdentifierInfo(), clang::Preprocessor::getIdentifierTable(), getLangOpts(), clang::Sema::Initialize(), clang::ObjC, and clang::Preprocessor::SetPoisonReason().

Parse a constraint-logical-and-expression.

///       C++2a[temp.constr.decl]p1
///       constraint-logical-and-expression:
///         primary-expression
///         constraint-logical-and-expression '&&' primary-expression
///
/// 

Definition at line 309 of file ParseExpr.cpp.

References clang::Sema::ActOnBinOp(), clang::Sema::CheckConstraintExpression(), ConsumeToken(), clang::Sema::CorrectDelayedTyposInExpr(), clang::FixItHint::CreateInsertion(), Diag(), E, clang::ExprError(), clang::ActionResult< PtrTy, Compress >::get(), clang::Stmt::getBeginLoc(), clang::getBinOpPrecedence(), getCurScope(), clang::Stmt::getEndLoc(), clang::Expr::getExprLoc(), clang::Token::getKind(), clang::Preprocessor::getLocForEndOfToken(), clang::Stmt::getSourceRange(), clang::prec::InclusiveOr, clang::Token::is(), clang::ActionResult< PtrTy, Compress >::isInvalid(), clang::Token::isOneOf(), clang::ActionResult< PtrTy, Compress >::isUsable(), clang::prec::LogicalAnd, NextToken(), clang::Note, NotTypeCast, and clang::Sema::Unevaluated.

Referenced by ParseConstraintLogicalOrExpression().

Parse a constraint-logical-or-expression.

///       C++2a[temp.constr.decl]p1
///       constraint-logical-or-expression:
///         constraint-logical-and-expression
///         constraint-logical-or-expression '||'
///             constraint-logical-and-expression
///
/// 

Definition at line 401 of file ParseExpr.cpp.

References clang::Sema::ActOnBinOp(), ConsumeToken(), clang::Sema::CorrectDelayedTyposInExpr(), clang::ExprError(), clang::ActionResult< PtrTy, Compress >::get(), getCurScope(), clang::Token::is(), clang::ActionResult< PtrTy, Compress >::isUsable(), and ParseConstraintLogicalAndExpression().

Simple precedence-based parser for binary/ternary operators.

Note: we diverge from the C99 grammar when parsing the assignment-expression production. C99 specifies that the LHS of an assignment operator should be parsed as a unary-expression, but consistency dictates that it be a conditional-expession. In practice, the important thing here is that the LHS of an assignment has to be an l-value, which productions between unary-expression and conditional-expression don't produce. Because we want consistency, we parse the LHS as a conditional-expression, then check for l-value-ness in semantic analysis stages.

///       pm-expression: [C++ 5.5]
///         cast-expression
///         pm-expression '.*' cast-expression
///         pm-expression '->*' cast-expression
///
///       multiplicative-expression: [C99 6.5.5]
///     Note: in C++, apply pm-expression instead of cast-expression
///         cast-expression
///         multiplicative-expression '*' cast-expression
///         multiplicative-expression '/' cast-expression
///         multiplicative-expression '%' cast-expression
///
///       additive-expression: [C99 6.5.6]
///         multiplicative-expression
///         additive-expression '+' multiplicative-expression
///         additive-expression '-' multiplicative-expression
///
///       shift-expression: [C99 6.5.7]
///         additive-expression
///         shift-expression '<<' additive-expression
///         shift-expression '>>' additive-expression
///
///       compare-expression: [C++20 expr.spaceship]
///         shift-expression
///         compare-expression '<=>' shift-expression
///
///       relational-expression: [C99 6.5.8]
///         compare-expression
///         relational-expression '<' compare-expression
///         relational-expression '>' compare-expression
///         relational-expression '<=' compare-expression
///         relational-expression '>=' compare-expression
///
///       equality-expression: [C99 6.5.9]
///         relational-expression
///         equality-expression '==' relational-expression
///         equality-expression '!=' relational-expression
///
///       AND-expression: [C99 6.5.10]
///         equality-expression
///         AND-expression '&' equality-expression
///
///       exclusive-OR-expression: [C99 6.5.11]
///         AND-expression
///         exclusive-OR-expression '^' AND-expression
///
///       inclusive-OR-expression: [C99 6.5.12]
///         exclusive-OR-expression
///         inclusive-OR-expression '|' exclusive-OR-expression
///
///       logical-AND-expression: [C99 6.5.13]
///         inclusive-OR-expression
///         logical-AND-expression '&&' inclusive-OR-expression
///
///       logical-OR-expression: [C99 6.5.14]
///         logical-AND-expression
///         logical-OR-expression '||' logical-AND-expression
///
///       conditional-expression: [C99 6.5.15]
///         logical-OR-expression
///         logical-OR-expression '?' expression ':' conditional-expression
/// [GNU]   logical-OR-expression '?' ':' conditional-expression
/// [C++] the third operand is an assignment-expression
///
///       assignment-expression: [C99 6.5.16]
///         conditional-expression
///         unary-expression assignment-operator assignment-expression
/// [C++]   throw-expression [C++ 15]
///
///       assignment-operator: one of
///         = *= /= %= += -= <<= >>= &= ^= |=
///
///       expression: [C99 6.5.17]
///         assignment-expression ...[opt]
///         expression ',' assignment-expression ...[opt]
/// 

Definition at line 134 of file ParseExpr.cpp.

References clang::prec::Comma, and ParseAssignmentExpression().

Parses the mapper modifier in map, to, and from clauses.

Parse the mapper modifier in map, to, and from clauses.

Definition at line 4232 of file ParseOpenMP.cpp.

References ConsumeToken(), clang::CPlusPlus, clang::Data, clang::ASTContext::DeclarationNames, Diag(), clang::Sema::getASTContext(), clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLocation(), clang::Token::isNot(), SkipUntil(), StopBeforeMatch, and clang::T.

Referenced by parseMapTypeModifiers(), and ParseOpenMPVarList().

Parses map-type-modifiers in map clause.

Parse map-type-modifiers in map clause.

map([ [map-type-modifier[,] [map-type-modifier[,] ...] map-type : ] list) where, map-type-modifier ::= always | close | mapper(mapper-identifier)

map([ [map-type-modifier[,] [map-type-modifier[,] ...] [map-type] : ] list) where, map-type-modifier ::= always | close | mapper(mapper-identifier) | present where, map-type ::= alloc | delete | from | release | to | tofrom

Definition at line 4267 of file ParseOpenMP.cpp.

References ConsumeToken(), clang::Data, Diag(), getCurToken(), clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLocation(), clang::IdentifierInfo::getName(), clang::Token::is(), isMapModifier(), isMapType(), clang::Token::isNot(), clang::Preprocessor::LookAhead(), clang::OMPC_MAP_unknown, and parseMapperModifier().

Referenced by ParseOpenMPVarList().

Parse an identifier in an MS-style inline assembly block.

Definition at line 200 of file ParseStmtAsm.cpp.

References ConsumeAnyToken(), ConsumeToken(), clang::CPlusPlus, clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLocation(), Id, clang::Token::is(), clang::Token::isNot(), clang::Preprocessor::LookAhead(), clang::Sema::LookupInlineAsmIdentifier(), clang::Sema::LookupInlineAsmVarDeclField(), ParseUnqualifiedId(), clang::Result, clang::Token::setKind(), and clang::Token::startToken().

Parses clauses with list.

Definition at line 4619 of file ParseOpenMP.cpp.

References clang::Sema::ActOnFinishFullExpr(), clang::BalancedDelimiterTracker::consumeClose(), clang::BalancedDelimiterTracker::consumeOpen(), ConsumeToken(), clang::Sema::CorrectDelayedTyposInExpr(), clang::CPlusPlus, clang::Data, clang::Scope::DeclScope, Diag(), EnterScope(), ExitScope(), clang::ActionResult< PtrTy, Compress >::get(), getCurToken(), clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLocation(), clang::Sema::GetNameFromUnqualifiedId(), clang::getOpenMPSimpleClauseType(), clang::Preprocessor::getSpelling(), clang::Token::is(), clang::Token::isAnnotation(), clang::Token::isNot(), clang::isOpenMPDistributeDirective(), clang::isOpenMPTaskLoopDirective(), clang::IdentifierInfo::isStr(), clang::ActionResult< PtrTy, Compress >::isUsable(), Loc, clang::Preprocessor::LookAhead(), NextToken(), clang::OMPC_ADJUST_ARGS_unknown, clang::OMPC_DEPEND_unknown, clang::OMPC_DOACROSS_unknown, clang::OMPC_LASTPRIVATE_unknown, clang::OMPC_MAP_unknown, clang::OMPC_MOTION_MODIFIER_unknown, clang::OMPC_REDUCTION_unknown, clang::Scope::OpenMPDirectiveScope, ParseAssignmentExpression(), parseMapperModifier(), parseMapType(), parseMapTypeModifiers(), parseOpenMPAllocateClauseModifiers(), ParseOpenMPReservedLocator(), ParseReductionId(), clang::Preprocessor::parseSimpleIntegerLiteral(), parseStepSize(), SkipUntil(), StopBeforeMatch, and clang::T.

ParseTopLevelDecl - Parse one top-level declaration.

ParseTopLevelDecl - Parse one top-level declaration, return whatever the action tells us to.

Returns true if the EOF was encountered.

This returns true if the EOF was encountered.

top-level-declaration: declaration [C++20] module-import-declaration

Definition at line 628 of file Parser.cpp.

References clang::Sema::ActOnAnnotModuleBegin(), clang::Sema::ActOnAnnotModuleEnd(), clang::Sema::ActOnAnnotModuleInclude(), clang::Sema::ActOnEndOfTranslationUnit(), clang::Sema::ActOnModuleImport(), clang::Sema::ConvertDeclToDeclGroup(), clang::Preprocessor::Diag(), clang::Sema::FirstDecl, clang::Token::getAnnotationValue(), clang::Token::getIdentifierInfo(), clang::Token::getKind(), getKind(), getLangOpts(), clang::Token::getLocation(), clang::Preprocessor::getMaxTokens(), clang::Preprocessor::getMaxTokensOverrideLoc(), clang::Preprocessor::getTokenCount(), clang::Sema::ImportAllowed, clang::Sema::ImportFinished, clang::Module::isHeaderUnit(), clang::SourceLocation::isValid(), Loc, NextToken(), clang::Sema::NotACXX20Module, clang::Sema::PrivateFragmentImportAllowed, clang::Sema::PrivateFragmentImportFinished, clang::Result, and clang::Sema::SetLateTemplateParser().

Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.

unqualified-id: [

++

.prim.general]

identifier

operator-function-id

conversion-function-id

[

++0x] literal-

-

[TODO]

~ class-name

template-id

const internal::VariadicDynCastAllOfMatcher< Stmt, Expr > expr

Matches expressions.

Parameters

SS The nested-name-specifier that preceded this unqualified-id. If non-empty, then we are parsing the unqualified-id of a qualified-id. ObjectType if this unqualified-id occurs within a member access expression, the type of the base object whose member is being accessed. ObjectHadErrors if this unqualified-id occurs within a member access expression, indicates whether the original subexpressions had any errors. When true, diagnostics for missing 'template' keyword will be supressed. EnteringContext whether we are entering the scope of the nested-name-specifier. AllowDestructorName whether we allow parsing of a destructor name. AllowConstructorName whether we allow parsing a constructor name. AllowDeductionGuide whether we allow parsing a deduction guide name. Result on a successful parse, contains the parsed unqualified-id.

Returns

true if parsing fails, false otherwise.

Definition at line 2987 of file ParseExprCXX.cpp.

References clang::Sema::ActOnTemplateName(), clang::CXXScopeSpec::clear(), ConsumeToken(), clang::CPlusPlus, clang::CPlusPlus17, clang::FixItHint::CreateInsertion(), clang::FixItHint::CreateRemoval(), Diag(), clang::Sema::getConstructorName(), getCurScope(), clang::Sema::getDestructorName(), clang::Sema::getDestructorTypeForDecltype(), clang::Token::getIdentifierInfo(), clang::Token::getKind(), getLangOpts(), clang::Token::getLocation(), clang::IdentifierInfo::getName(), Id, clang::IK_LiteralOperatorId, clang::IK_OperatorFunctionId, clang::Token::is(), clang::Sema::isCurrentClassName(), clang::Sema::isDeductionGuideName(), clang::CXXScopeSpec::isEmpty(), clang::TemplateIdAnnotation::isInvalid(), clang::Token::isNot(), clang::CXXScopeSpec::isNotEmpty(), clang::CXXScopeSpec::isSet(), clang::SourceLocation::isValid(), clang::TemplateIdAnnotation::LAngleLoc, clang::TemplateIdAnnotation::Name, NextToken(), clang::TemplateIdAnnotation::RAngleLoc, clang::Result, clang::Token::setKind(), clang::Sema::ShouldEnterDeclaratorScope(), clang::TemplateIdAnnotation::TemplateKWLoc, clang::TemplateIdAnnotation::TemplateNameLoc, clang::TNK_Dependent_template_name, clang::TNK_Function_template, clang::TNK_Non_template, and clang::TNK_Var_template.

Referenced by ParseMSAsmIdentifier().

SkipUntil - Read tokens until we get to the specified token, then consume it (unless no flag StopBeforeMatch).

Because we cannot guarantee that the token will ever occur, this skips to the next token, or to some likely good stopping point. If StopAtSemi is true, skipping will stop at a ';' character.

If SkipUntil finds the specified token, it returns true, otherwise it returns false.

Definition at line 286 of file Parser.cpp.

References ConsumeAnyToken(), ConsumeToken(), clang::Token::getKind(), HasFlagsSet(), clang::Token::is(), clang::Token::isNot(), SkipUntil(), StopAtCodeCompletion, StopAtSemi, and StopBeforeMatch.

SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch is specified).

Because we cannot guarantee that the token will ever occur, this skips to the next token, or to some likely good stopping point. If Flags has StopAtSemi flag, skipping will stop at a ';' character. Balances (), [], and {} delimiter tokens while skipping.

If SkipUntil finds the specified token, it returns true, otherwise it returns false.

Definition at line 1294 of file Parser.h.

References SkipUntil(), and clang::T.

Referenced by clang::BalancedDelimiterTracker::expectAndConsume(), clang::Parser::ConditionDeclarationOrInitStatementState::markNotExpression(), parseMapperModifier(), ParseOpenMPVarList(), SkipMalformedDecl(), clang::BalancedDelimiterTracker::skipToEnd(), and SkipUntil().

TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C++) or a C++ scope specifier not followed by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens with a single annotation token representing the typename or C++ scope respectively.

This simplifies handling of C++ scope specifiers and allows efficient backtracking without the need to re-parse and resolve nested-names and typenames. It will mainly be called when we expect to treat identifiers as typenames (if they are typenames). For example, in C we do not expect identifiers inside expressions to be treated as typenames so it will not be called for expressions in C. The benefit for C/ObjC is that a typename will be annotated and Actions.getTypeName will not be needed to be called again (e.g. getTypeName will not be called twice, once to check whether we have a declaration specifier, and another one to get the actual type inside ParseDeclarationSpecifiers).

This returns true if an error occurred.

Note that this routine emits an error if you call it with ::new or ::delete as the current tokens, so only call it in contexts where these are invalid.

Definition at line 1995 of file Parser.cpp.

References clang::Sema::ActOnTypenameType(), clang::Preprocessor::AnnotateCachedTokens(), ConsumeToken(), clang::CPlusPlus, Diag(), clang::Preprocessor::EnterToken(), clang::Token::getAnnotationRange(), getCurScope(), clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLastLoc(), clang::Token::getLocation(), clang::CXXScopeSpec::getRange(), clang::TemplateIdAnnotation::getTemplateArgs(), clang::Token::is(), clang::Token::isAnnotation(), clang::Token::isEditorPlaceholder(), clang::CXXScopeSpec::isEmpty(), clang::TemplateIdAnnotation::isInvalid(), clang::TemplateIdAnnotation::LAngleLoc, clang::Preprocessor::Lex(), clang::TemplateIdAnnotation::mightBeType(), clang::TemplateIdAnnotation::Name, NextToken(), clang::TemplateIdAnnotation::NumArgs, clang::TemplateIdAnnotation::RAngleLoc, clang::Result, clang::Token::setAnnotationEndLoc(), clang::Token::setKind(), clang::Token::setLocation(), clang::TemplateIdAnnotation::Template, clang::TemplateIdAnnotation::TemplateKWLoc, clang::TemplateIdAnnotation::TemplateNameLoc, TryAnnotateTypeOrScopeToken(), TryAnnotateTypeOrScopeTokenAfterScopeSpec(), and clang::TypeError().

Referenced by TryAnnotateTypeOrScopeToken().

Try to annotate a type or scope token, having already parsed an optional scope specifier.

IsNewScope should be true unless the scope specifier was extracted from an existing tok::annot_cxxscope annotation.

An Objective-C object type followed by '<' is a specialization of a parameterized class type or a protocol-qualified type.

Definition at line 2124 of file Parser.cpp.

References clang::Preprocessor::AnnotateCachedTokens(), ConsumeToken(), clang::CPlusPlus, Diag(), clang::OpaquePtr< PtrTy >::get(), clang::ActionResult< PtrTy, Compress >::get(), clang::CXXScopeSpec::getBeginLoc(), getCurScope(), clang::Token::getIdentifierInfo(), getLangOpts(), clang::Token::getLocation(), clang::Sema::getTypeName(), clang::Token::is(), clang::CXXScopeSpec::isEmpty(), clang::CXXScopeSpec::isNotEmpty(), clang::Type::isObjCObjectPointerType(), clang::Type::isObjCObjectType(), clang::Sema::isTemplateName(), clang::ActionResult< PtrTy, Compress >::isUsable(), clang::TemplateIdAnnotation::Kind, NextToken(), clang::ObjC, clang::Token::setAnnotationEndLoc(), clang::Token::setKind(), clang::Token::setLocation(), clang::TNK_Type_template, and clang::TNK_Undeclared_template.

Referenced by TryAnnotateTypeOrScopeToken().

Definition at line 65 of file Parser.h.

The location of the first statement inside an else that might have a missleading indentation.

If there is no MisleadingIndentationChecker on an else active, this location is invalid.

Definition at line 1318 of file Parser.h.

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

• include/clang/Parse/Parser.h
• lib/Parse/ParseCXXInlineMethods.cpp
• lib/Parse/ParseDecl.cpp
• lib/Parse/ParseDeclCXX.cpp
• lib/Parse/ParseExpr.cpp
• lib/Parse/ParseExprCXX.cpp
• lib/Parse/ParseHLSL.cpp
• lib/Parse/ParseInit.cpp
• lib/Parse/ParseObjc.cpp
• lib/Parse/ParseOpenACC.cpp
• lib/Parse/ParseOpenMP.cpp
• lib/Parse/ParsePragma.cpp
• lib/Parse/Parser.cpp
• lib/Parse/ParseStmt.cpp
• lib/Parse/ParseStmtAsm.cpp
• lib/Parse/ParseTemplate.cpp
• lib/Parse/ParseTentative.cpp

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