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clang-1/lib/Sema/Sema.h

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//===--- Sema.h - Semantic Analysis & AST Building --------------*- 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 Sema class, which performs semantic analysis and
// builds ASTs.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_SEMA_H
#define LLVM_CLANG_AST_SEMA_H
#include "IdentifierResolver.h"
#include "clang/Parse/Action.h"
#include "clang/Parse/DeclSpec.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/SmallPtrSet.h"
#include <vector>
#include <string>
namespace llvm {
class APSInt;
}
namespace clang {
class ASTContext;
class ASTConsumer;
class Preprocessor;
class Decl;
class DeclContext;
class NamedDecl;
class ScopedDecl;
class Expr;
class InitListExpr;
class CallExpr;
class VarDecl;
class ParmVarDecl;
class TypedefDecl;
class FunctionDecl;
class QualType;
struct LangOptions;
class Token;
class IntegerLiteral;
class StringLiteral;
class ArrayType;
class LabelStmt;
class SwitchStmt;
class ExtVectorType;
class TypedefDecl;
class ObjCInterfaceDecl;
class ObjCCompatibleAliasDecl;
class ObjCProtocolDecl;
class ObjCImplementationDecl;
class ObjCCategoryImplDecl;
class ObjCCategoryDecl;
class ObjCIvarDecl;
class ObjCMethodDecl;
class ObjCPropertyDecl;
/// Sema - This implements semantic analysis and AST building for C.
class Sema : public Action {
public:
Preprocessor &PP;
ASTContext &Context;
ASTConsumer &Consumer;
/// CurContext - This is the current declaration context of parsing.
DeclContext *CurContext;
/// LabelMap - This is a mapping from label identifiers to the LabelStmt for
/// it (which acts like the label decl in some ways). Forward referenced
/// labels have a LabelStmt created for them with a null location & SubStmt.
llvm::DenseMap<IdentifierInfo*, LabelStmt*> LabelMap;
llvm::SmallVector<SwitchStmt*, 8> SwitchStack;
/// ExtVectorDecls - This is a list all the extended vector types. This allows
/// us to associate a raw vector type with one of the ext_vector type names.
/// This is only necessary for issuing pretty diagnostics.
llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls;
/// ObjCImplementations - Keep track of all of the classes with
/// @implementation's, so that we can emit errors on duplicates.
llvm::DenseMap<IdentifierInfo*, ObjCImplementationDecl*> ObjCImplementations;
/// ObjCProtocols - Keep track of all protocol declarations declared
/// with @protocol keyword, so that we can emit errors on duplicates and
/// find the declarations when needed.
llvm::DenseMap<IdentifierInfo*, ObjCProtocolDecl*> ObjCProtocols;
/// ObjCInterfaceDecls - Keep track of all class declarations declared
/// with @interface, so that we can emit errors on duplicates and
/// find the declarations when needed.
typedef llvm::DenseMap<const IdentifierInfo*,
ObjCInterfaceDecl*> ObjCInterfaceDeclsTy;
ObjCInterfaceDeclsTy ObjCInterfaceDecls;
/// ObjCAliasDecls - Keep track of all class declarations declared
/// with @compatibility_alias, so that we can emit errors on duplicates and
/// find the declarations when needed. This construct is ancient and will
/// likely never be seen. Nevertheless, it is here for compatibility.
typedef llvm::DenseMap<const IdentifierInfo*,
ObjCCompatibleAliasDecl*> ObjCAliasTy;
ObjCAliasTy ObjCAliasDecls;
IdentifierResolver IdResolver;
// Enum values used by KnownFunctionIDs (see below).
enum {
id_printf,
id_fprintf,
id_sprintf,
id_snprintf,
id_asprintf,
id_NSLog,
id_vsnprintf,
id_vasprintf,
id_vfprintf,
id_vsprintf,
id_vprintf,
id_num_known_functions
};
/// KnownFunctionIDs - This is a list of IdentifierInfo objects to a set
/// of known functions used by the semantic analysis to do various
/// kinds of checking (e.g. checking format string errors in printf calls).
/// This list is populated upon the creation of a Sema object.
IdentifierInfo* KnownFunctionIDs[ id_num_known_functions ];
/// Translation Unit Scope - useful to Objective-C actions that need
/// to lookup file scope declarations in the "ordinary" C decl namespace.
/// For example, user-defined classes, built-in "id" type, etc.
Scope *TUScope;
/// ObjCMethodList - a linked list of methods with different signatures.
struct ObjCMethodList {
ObjCMethodDecl *Method;
ObjCMethodList *Next;
ObjCMethodList() {
Method = 0;
Next = 0;
}
ObjCMethodList(ObjCMethodDecl *M, ObjCMethodList *C) {
Method = M;
Next = C;
}
};
/// Instance/Factory Method Pools - allows efficient lookup when typechecking
/// messages to "id". We need to maintain a list, since selectors can have
/// differing signatures across classes. In Cocoa, this happens to be
/// extremely uncommon (only 1% of selectors are "overloaded").
llvm::DenseMap<Selector, ObjCMethodList> InstanceMethodPool;
llvm::DenseMap<Selector, ObjCMethodList> FactoryMethodPool;
public:
Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer);
const LangOptions &getLangOptions() const;
/// The primitive diagnostic helpers - always returns true, which simplifies
/// error handling (i.e. less code).
bool Diag(SourceLocation Loc, unsigned DiagID);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2);
/// More expressive diagnostic helpers for expressions (say that 6 times:-)
bool Diag(SourceLocation Loc, unsigned DiagID, SourceRange R1);
bool Diag(SourceLocation Loc, unsigned DiagID,
SourceRange R1, SourceRange R2);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
SourceRange R1);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
SourceRange R1, SourceRange R2);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2, SourceRange R1);
bool Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2, const std::string &Msg3, SourceRange R1);
bool Diag(SourceLocation Loc, unsigned DiagID,
const std::string &Msg1, const std::string &Msg2,
SourceRange R1, SourceRange R2);
virtual void DeleteExpr(ExprTy *E);
virtual void DeleteStmt(StmtTy *S);
//===--------------------------------------------------------------------===//
// Type Analysis / Processing: SemaType.cpp.
//
QualType ConvertDeclSpecToType(const DeclSpec &DS);
void ProcessTypeAttributeList(QualType &Result, const AttributeList *AL);
QualType GetTypeForDeclarator(Declarator &D, Scope *S);
QualType ObjCGetTypeForMethodDefinition(DeclTy *D);
virtual TypeResult ActOnTypeName(Scope *S, Declarator &D);
private:
//===--------------------------------------------------------------------===//
// Symbol table / Decl tracking callbacks: SemaDecl.cpp.
//
virtual DeclTy *isTypeName(const IdentifierInfo &II, Scope *S);
virtual DeclTy *ActOnDeclarator(Scope *S, Declarator &D, DeclTy *LastInGroup);
virtual DeclTy *ActOnParamDeclarator(Scope *S, Declarator &D);
virtual void ActOnParamDefaultArgument(DeclTy *param,
SourceLocation EqualLoc,
ExprTy *defarg);
void AddInitializerToDecl(DeclTy *dcl, ExprTy *init);
virtual DeclTy *FinalizeDeclaratorGroup(Scope *S, DeclTy *Group);
virtual DeclTy *ActOnStartOfFunctionDef(Scope *S, Declarator &D);
// Until 'real' implementation is in place, override both
// 'ActOnStartOfFunctionDef' to satisfy the compiler.
virtual DeclTy *ActOnStartOfFunctionDef(Scope *S, DeclTy *D) { return D; }
virtual void ObjCActOnStartOfMethodDef(Scope *S, DeclTy *D);
virtual DeclTy *ActOnFinishFunctionBody(DeclTy *Decl, StmtTy *Body);
virtual DeclTy *ActOnLinkageSpec(SourceLocation Loc, SourceLocation LBrace,
SourceLocation RBrace, const char *Lang,
unsigned StrSize, DeclTy *D);
virtual DeclTy *ActOnFileScopeAsmDecl(SourceLocation Loc, ExprTy *expr);
/// Scope actions.
virtual void ActOnPopScope(SourceLocation Loc, Scope *S);
virtual void ActOnTranslationUnitScope(SourceLocation Loc, Scope *S);
/// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with
/// no declarator (e.g. "struct foo;") is parsed.
virtual DeclTy *ParsedFreeStandingDeclSpec(Scope *S, DeclSpec &DS);
virtual DeclTy *ActOnTag(Scope *S, unsigned TagType, TagKind TK,
SourceLocation KWLoc, IdentifierInfo *Name,
SourceLocation NameLoc, AttributeList *Attr);
virtual void ActOnDefs(Scope *S, SourceLocation DeclStart, IdentifierInfo
*ClassName, llvm::SmallVector<DeclTy*, 16> &Decls);
virtual DeclTy *ActOnField(Scope *S, SourceLocation DeclStart,
Declarator &D, ExprTy *BitfieldWidth);
virtual DeclTy *ActOnIvar(Scope *S, SourceLocation DeclStart,
Declarator &D, ExprTy *BitfieldWidth,
tok::ObjCKeywordKind visibility);
// This is used for both record definitions and ObjC interface declarations.
virtual void ActOnFields(Scope* S,
SourceLocation RecLoc, DeclTy *TagDecl,
DeclTy **Fields, unsigned NumFields,
SourceLocation LBrac, SourceLocation RBrac);
virtual DeclTy *ActOnEnumConstant(Scope *S, DeclTy *EnumDecl,
DeclTy *LastEnumConstant,
SourceLocation IdLoc, IdentifierInfo *Id,
SourceLocation EqualLoc, ExprTy *Val);
virtual void ActOnEnumBody(SourceLocation EnumLoc, DeclTy *EnumDecl,
DeclTy **Elements, unsigned NumElements);
private:
/// Set the current declaration context until it gets popped.
void PushDeclContext(DeclContext *DC);
void PopDeclContext();
/// CurFunctionDecl - If inside of a function body, this returns a pointer to
/// the function decl for the function being parsed.
FunctionDecl *getCurFunctionDecl() {
return dyn_cast<FunctionDecl>(CurContext);
}
/// CurMethodDecl - If inside of a method body, this returns a pointer to
/// the method decl for the method being parsed.
ObjCMethodDecl *getCurMethodDecl() {
return dyn_cast<ObjCMethodDecl>(CurContext);
}
/// Add this decl to the scope shadowed decl chains.
void PushOnScopeChains(NamedDecl *D, Scope *S);
/// Subroutines of ActOnDeclarator().
TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
ScopedDecl *LastDecl);
TypedefDecl *MergeTypeDefDecl(TypedefDecl *New, Decl *Old);
FunctionDecl *MergeFunctionDecl(FunctionDecl *New, Decl *Old,
bool &Redeclaration);
VarDecl *MergeVarDecl(VarDecl *New, Decl *Old);
FunctionDecl *MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old);
/// Helpers for dealing with function parameters
bool CheckParmsForFunctionDef(FunctionDecl *FD);
ImplicitParamDecl *CreateImplicitParameter(Scope *S, IdentifierInfo *Id,
SourceLocation IdLoc, QualType Type);
void CheckCXXDefaultArguments(FunctionDecl *FD);
void CheckExtraCXXDefaultArguments(Declarator &D);
/// More parsing and symbol table subroutines...
Decl *LookupDecl(const IdentifierInfo *II, unsigned NSI, Scope *S,
bool enableLazyBuiltinCreation = true);
ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *Id);
ScopedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
Scope *S);
ScopedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
Scope *S);
// Decl attributes - this routine is the top level dispatcher.
void ProcessDeclAttributes(Decl *D, const Declarator &PD);
void ProcessDeclAttributeList(Decl *D, const AttributeList *AttrList);
void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
bool &IncompleteImpl);
/// CheckProtocolMethodDefs - This routine checks unimpletented methods
/// Declared in protocol, and those referenced by it.
void CheckProtocolMethodDefs(SourceLocation ImpLoc,
ObjCProtocolDecl *PDecl,
bool& IncompleteImpl,
const llvm::DenseSet<Selector> &InsMap,
const llvm::DenseSet<Selector> &ClsMap);
/// CheckImplementationIvars - This routine checks if the instance variables
/// listed in the implelementation match those listed in the interface.
void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
ObjCIvarDecl **Fields, unsigned nIvars,
SourceLocation Loc);
/// ImplMethodsVsClassMethods - This is main routine to warn if any method
/// remains unimplemented in the @implementation class.
void ImplMethodsVsClassMethods(ObjCImplementationDecl* IMPDecl,
ObjCInterfaceDecl* IDecl);
/// ImplCategoryMethodsVsIntfMethods - Checks that methods declared in the
/// category interface is implemented in the category @implementation.
void ImplCategoryMethodsVsIntfMethods(ObjCCategoryImplDecl *CatImplDecl,
ObjCCategoryDecl *CatClassDecl);
/// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
/// true, or false, accordingly.
bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
const ObjCMethodDecl *PrevMethod);
/// isBuiltinObjCType - Returns true of the type is "id", "SEL", "Class"
/// or "Protocol".
bool isBuiltinObjCType(TypedefDecl *TD);
/// isObjCObjectPointerType - Returns true if type is an objective-c pointer
/// to an object type; such as "id", "Class", Intf*, id<P>, etc.
bool isObjCObjectPointerType(QualType type) const;
/// AddInstanceMethodToGlobalPool - All instance methods in a translation
/// unit are added to a global pool. This allows us to efficiently associate
/// a selector with a method declaraation for purposes of typechecking
/// messages sent to "id" (where the class of the object is unknown).
void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method);
/// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method);
//===--------------------------------------------------------------------===//
// Statement Parsing Callbacks: SemaStmt.cpp.
public:
virtual StmtResult ActOnExprStmt(ExprTy *Expr);
virtual StmtResult ActOnNullStmt(SourceLocation SemiLoc);
virtual StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
StmtTy **Elts, unsigned NumElts,
bool isStmtExpr);
virtual StmtResult ActOnDeclStmt(DeclTy *Decl, SourceLocation StartLoc,
SourceLocation EndLoc);
virtual StmtResult ActOnCaseStmt(SourceLocation CaseLoc, ExprTy *LHSVal,
SourceLocation DotDotDotLoc, ExprTy *RHSVal,
SourceLocation ColonLoc, StmtTy *SubStmt);
virtual StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
SourceLocation ColonLoc, StmtTy *SubStmt,
Scope *CurScope);
virtual StmtResult ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II,
SourceLocation ColonLoc, StmtTy *SubStmt);
virtual StmtResult ActOnIfStmt(SourceLocation IfLoc, ExprTy *CondVal,
StmtTy *ThenVal, SourceLocation ElseLoc,
StmtTy *ElseVal);
virtual StmtResult ActOnStartOfSwitchStmt(ExprTy *Cond);
virtual StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
StmtTy *Switch, ExprTy *Body);
virtual StmtResult ActOnWhileStmt(SourceLocation WhileLoc, ExprTy *Cond,
StmtTy *Body);
virtual StmtResult ActOnDoStmt(SourceLocation DoLoc, StmtTy *Body,
SourceLocation WhileLoc, ExprTy *Cond);
virtual StmtResult ActOnForStmt(SourceLocation ForLoc,
SourceLocation LParenLoc,
StmtTy *First, ExprTy *Second, ExprTy *Third,
SourceLocation RParenLoc, StmtTy *Body);
virtual StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
SourceLocation LParenLoc,
StmtTy *First, ExprTy *Second,
SourceLocation RParenLoc, StmtTy *Body);
virtual StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
SourceLocation LabelLoc,
IdentifierInfo *LabelII);
virtual StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
SourceLocation StarLoc,
ExprTy *DestExp);
virtual StmtResult ActOnContinueStmt(SourceLocation ContinueLoc,
Scope *CurScope);
virtual StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope);
virtual StmtResult ActOnReturnStmt(SourceLocation ReturnLoc,
ExprTy *RetValExp);
virtual StmtResult ActOnAsmStmt(SourceLocation AsmLoc,
bool IsSimple,
bool IsVolatile,
unsigned NumOutputs,
unsigned NumInputs,
std::string *Names,
ExprTy **Constraints,
ExprTy **Exprs,
ExprTy *AsmString,
unsigned NumClobbers,
ExprTy **Clobbers,
SourceLocation RParenLoc);
virtual StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc,
SourceLocation RParen, StmtTy *Parm,
StmtTy *Body, StmtTy *CatchList);
virtual StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc,
StmtTy *Body);
virtual StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc,
StmtTy *Try,
StmtTy *Catch, StmtTy *Finally);
virtual StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc,
StmtTy *Throw);
virtual StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
ExprTy *SynchExpr,
StmtTy *SynchBody);
//===--------------------------------------------------------------------===//
// Expression Parsing Callbacks: SemaExpr.cpp.
// Primary Expressions.
virtual ExprResult ActOnIdentifierExpr(Scope *S, SourceLocation Loc,
IdentifierInfo &II,
bool HasTrailingLParen);
virtual ExprResult ActOnPreDefinedExpr(SourceLocation Loc,
tok::TokenKind Kind);
virtual ExprResult ActOnNumericConstant(const Token &);
virtual ExprResult ActOnCharacterConstant(const Token &);
virtual ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R,
ExprTy *Val);
/// ActOnStringLiteral - The specified tokens were lexed as pasted string
/// fragments (e.g. "foo" "bar" L"baz").
virtual ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks);
// Binary/Unary Operators. 'Tok' is the token for the operator.
virtual ExprResult ActOnUnaryOp(SourceLocation OpLoc, tok::TokenKind Op,
ExprTy *Input);
virtual ExprResult
ActOnSizeOfAlignOfTypeExpr(SourceLocation OpLoc, bool isSizeof,
SourceLocation LParenLoc, TypeTy *Ty,
SourceLocation RParenLoc);
virtual ExprResult ActOnPostfixUnaryOp(SourceLocation OpLoc,
tok::TokenKind Kind, ExprTy *Input);
virtual ExprResult ActOnArraySubscriptExpr(ExprTy *Base, SourceLocation LLoc,
ExprTy *Idx, SourceLocation RLoc);
virtual ExprResult ActOnMemberReferenceExpr(ExprTy *Base,SourceLocation OpLoc,
tok::TokenKind OpKind,
SourceLocation MemberLoc,
IdentifierInfo &Member);
/// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
/// This provides the location of the left/right parens and a list of comma
/// locations.
virtual ExprResult ActOnCallExpr(ExprTy *Fn, SourceLocation LParenLoc,
ExprTy **Args, unsigned NumArgs,
SourceLocation *CommaLocs,
SourceLocation RParenLoc);
virtual ExprResult ActOnCastExpr(SourceLocation LParenLoc, TypeTy *Ty,
SourceLocation RParenLoc, ExprTy *Op);
virtual ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, TypeTy *Ty,
SourceLocation RParenLoc, ExprTy *Op);
virtual ExprResult ActOnInitList(SourceLocation LParenLoc,
ExprTy **InitList, unsigned NumInit,
SourceLocation RParenLoc);
virtual ExprResult ActOnBinOp(SourceLocation TokLoc, tok::TokenKind Kind,
ExprTy *LHS,ExprTy *RHS);
/// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
/// in the case of a the GNU conditional expr extension.
virtual ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
SourceLocation ColonLoc,
ExprTy *Cond, ExprTy *LHS, ExprTy *RHS);
/// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
virtual ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
IdentifierInfo *LabelII);
virtual ExprResult ActOnStmtExpr(SourceLocation LPLoc, StmtTy *SubStmt,
SourceLocation RPLoc); // "({..})"
/// __builtin_offsetof(type, a.b[123][456].c)
virtual ExprResult ActOnBuiltinOffsetOf(SourceLocation BuiltinLoc,
SourceLocation TypeLoc, TypeTy *Arg1,
OffsetOfComponent *CompPtr,
unsigned NumComponents,
SourceLocation RParenLoc);
// __builtin_types_compatible_p(type1, type2)
virtual ExprResult ActOnTypesCompatibleExpr(SourceLocation BuiltinLoc,
TypeTy *arg1, TypeTy *arg2,
SourceLocation RPLoc);
// __builtin_choose_expr(constExpr, expr1, expr2)
virtual ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
ExprTy *cond, ExprTy *expr1, ExprTy *expr2,
SourceLocation RPLoc);
// __builtin_overload(...)
virtual ExprResult ActOnOverloadExpr(ExprTy **Args, unsigned NumArgs,
SourceLocation *CommaLocs,
SourceLocation BuiltinLoc,
SourceLocation RParenLoc);
// __builtin_va_arg(expr, type)
virtual ExprResult ActOnVAArg(SourceLocation BuiltinLoc,
ExprTy *expr, TypeTy *type,
SourceLocation RPLoc);
// Act on C++ namespaces
virtual DeclTy *ActOnStartNamespaceDef(Scope *S, SourceLocation IdentLoc,
IdentifierInfo *Ident,
SourceLocation LBrace);
virtual void ActOnFinishNamespaceDef(DeclTy *Dcl, SourceLocation RBrace);
/// ActOnCXXCasts - Parse {dynamic,static,reinterpret,const}_cast's.
virtual ExprResult ActOnCXXCasts(SourceLocation OpLoc, tok::TokenKind Kind,
SourceLocation LAngleBracketLoc, TypeTy *Ty,
SourceLocation RAngleBracketLoc,
SourceLocation LParenLoc, ExprTy *E,
SourceLocation RParenLoc);
/// ActOnCXXBoolLiteral - Parse {true,false} literals.
virtual ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc,
tok::TokenKind Kind);
//// ActOnCXXThrow - Parse throw expressions.
virtual ExprResult ActOnCXXThrow(SourceLocation OpLoc,
ExprTy *expr);
// ParseObjCStringLiteral - Parse Objective-C string literals.
virtual ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs,
ExprTy **Strings,
unsigned NumStrings);
virtual ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc,
SourceLocation EncodeLoc,
SourceLocation LParenLoc,
TypeTy *Ty,
SourceLocation RParenLoc);
// ParseObjCSelectorExpression - Build selector expression for @selector
virtual ExprResult ParseObjCSelectorExpression(Selector Sel,
SourceLocation AtLoc,
SourceLocation SelLoc,
SourceLocation LParenLoc,
SourceLocation RParenLoc);
// ParseObjCProtocolExpression - Build protocol expression for @protocol
virtual ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName,
SourceLocation AtLoc,
SourceLocation ProtoLoc,
SourceLocation LParenLoc,
SourceLocation RParenLoc);
//===--------------------------------------------------------------------===//
// C++ Classes
//
/// ActOnBaseSpecifier - Parsed a base specifier
virtual void ActOnBaseSpecifier(DeclTy *classdecl, SourceRange SpecifierRange,
bool Virtual, AccessSpecifier Access,
DeclTy *basetype, SourceLocation BaseLoc);
// Objective-C declarations.
virtual DeclTy *ActOnStartClassInterface(
SourceLocation AtInterafceLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *SuperName, SourceLocation SuperLoc,
IdentifierInfo **ProtocolNames, unsigned NumProtocols,
SourceLocation EndProtoLoc, AttributeList *AttrList);
virtual DeclTy *ActOnCompatiblityAlias(
SourceLocation AtCompatibilityAliasLoc,
IdentifierInfo *AliasName, SourceLocation AliasLocation,
IdentifierInfo *ClassName, SourceLocation ClassLocation);
virtual DeclTy *ActOnStartProtocolInterface(
SourceLocation AtProtoInterfaceLoc,
IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc,
IdentifierInfo **ProtoRefNames, unsigned NumProtoRefs,
SourceLocation EndProtoLoc);
virtual DeclTy *ActOnStartCategoryInterface(
SourceLocation AtInterfaceLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *CategoryName, SourceLocation CategoryLoc,
IdentifierInfo **ProtoRefNames, unsigned NumProtoRefs,
SourceLocation EndProtoLoc);
virtual DeclTy *ActOnStartClassImplementation(
SourceLocation AtClassImplLoc,
IdentifierInfo *ClassName, SourceLocation ClassLoc,
IdentifierInfo *SuperClassname,
SourceLocation SuperClassLoc);
virtual DeclTy *ActOnStartCategoryImplementation(
SourceLocation AtCatImplLoc,
IdentifierInfo *ClassName,
SourceLocation ClassLoc,
IdentifierInfo *CatName,
SourceLocation CatLoc);
virtual DeclTy *ActOnForwardClassDeclaration(SourceLocation Loc,
IdentifierInfo **IdentList,
unsigned NumElts);
virtual DeclTy *ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc,
IdentifierInfo **IdentList,
unsigned NumElts);
virtual void FindProtocolDeclaration(SourceLocation TypeLoc,
IdentifierInfo **ProtocolId,
unsigned NumProtocols,
llvm::SmallVector<DeclTy *, 8> &
Protocols);
void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
ObjCPropertyDecl *SuperProperty,
const char *Name);
void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl);
void MergeProtocolPropertiesIntoClass(ObjCInterfaceDecl *IDecl,
DeclTy *MergeProtocols);
void MergeOneProtocolPropertiesIntoClass(ObjCInterfaceDecl *IDecl,
ObjCProtocolDecl *PDecl);
virtual void ActOnAtEnd(SourceLocation AtEndLoc, DeclTy *classDecl,
DeclTy **allMethods = 0, unsigned allNum = 0,
DeclTy **allProperties = 0, unsigned pNum = 0);
virtual DeclTy *ActOnProperty(Scope *S, SourceLocation AtLoc,
FieldDeclarator &FD, ObjCDeclSpec &ODS,
Selector GetterSel, Selector SetterSel,
tok::ObjCKeywordKind MethodImplKind);
virtual DeclTy *ActOnPropertyImplDecl(SourceLocation AtLoc,
SourceLocation PropertyLoc,
bool ImplKind, DeclTy *ClassImplDecl,
IdentifierInfo *PropertyId,
IdentifierInfo *PropertyIvar);
virtual DeclTy *ActOnMethodDeclaration(
SourceLocation BeginLoc, // location of the + or -.
SourceLocation EndLoc, // location of the ; or {.
tok::TokenKind MethodType,
DeclTy *ClassDecl, ObjCDeclSpec &ReturnQT, TypeTy *ReturnType,
Selector Sel,
// optional arguments. The number of types/arguments is obtained
// from the Sel.getNumArgs().
ObjCDeclSpec *ArgQT, TypeTy **ArgTypes, IdentifierInfo **ArgNames,
AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind,
bool isVariadic = false);
// ActOnClassMessage - used for both unary and keyword messages.
// ArgExprs is optional - if it is present, the number of expressions
// is obtained from NumArgs.
virtual ExprResult ActOnClassMessage(
Scope *S,
IdentifierInfo *receivingClassName, Selector Sel,
SourceLocation lbrac, SourceLocation rbrac,
ExprTy **ArgExprs, unsigned NumArgs);
// ActOnInstanceMessage - used for both unary and keyword messages.
// ArgExprs is optional - if it is present, the number of expressions
// is obtained from NumArgs.
virtual ExprResult ActOnInstanceMessage(
ExprTy *receiver, Selector Sel,
SourceLocation lbrac, SourceLocation rbrac,
ExprTy **ArgExprs, unsigned NumArgs);
private:
/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit
/// cast. If there is already an implicit cast, merge into the existing one.
void ImpCastExprToType(Expr *&Expr, QualType Type);
// UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
// functions and arrays to their respective pointers (C99 6.3.2.1).
Expr *UsualUnaryConversions(Expr *&expr);
// UsualUnaryConversionType - Same as UsualUnaryConversions, but works
// on types instead of expressions
QualType UsualUnaryConversionType(QualType Ty);
// DefaultFunctionArrayConversion - converts functions and arrays
// to their respective pointers (C99 6.3.2.1).
void DefaultFunctionArrayConversion(Expr *&expr);
// DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that
// do not have a prototype. Integer promotions are performed on each
// argument, and arguments that have type float are promoted to double.
void DefaultArgumentPromotion(Expr *&Expr);
// UsualArithmeticConversions - performs the UsualUnaryConversions on it's
// operands and then handles various conversions that are common to binary
// operators (C99 6.3.1.8). If both operands aren't arithmetic, this
// routine returns the first non-arithmetic type found. The client is
// responsible for emitting appropriate error diagnostics.
QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr,
bool isCompAssign = false);
/// AssignConvertType - All of the 'assignment' semantic checks return this
/// enum to indicate whether the assignment was allowed. These checks are
/// done for simple assignments, as well as initialization, return from
/// function, argument passing, etc. The query is phrased in terms of a
/// source and destination type.
enum AssignConvertType {
/// Compatible - the types are compatible according to the standard.
Compatible,
/// PointerToInt - The assignment converts a pointer to an int, which we
/// accept as an extension.
PointerToInt,
/// IntToPointer - The assignment converts an int to a pointer, which we
/// accept as an extension.
IntToPointer,
/// FunctionVoidPointer - The assignment is between a function pointer and
/// void*, which the standard doesn't allow, but we accept as an extension.
FunctionVoidPointer,
/// IncompatiblePointer - The assignment is between two pointers types that
/// are not compatible, but we accept them as an extension.
IncompatiblePointer,
/// CompatiblePointerDiscardsQualifiers - The assignment discards
/// c/v/r qualifiers, which we accept as an extension.
CompatiblePointerDiscardsQualifiers,
/// Incompatible - We reject this conversion outright, it is invalid to
/// represent it in the AST.
Incompatible
};
/// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the
/// assignment conversion type specified by ConvTy. This returns true if the
/// conversion was invalid or false if the conversion was accepted.
bool DiagnoseAssignmentResult(AssignConvertType ConvTy,
SourceLocation Loc,
QualType DstType, QualType SrcType,
Expr *SrcExpr, const char *Flavor);
/// CheckAssignmentConstraints - Perform type checking for assignment,
/// argument passing, variable initialization, and function return values.
/// This routine is only used by the following two methods. C99 6.5.16.
AssignConvertType CheckAssignmentConstraints(QualType lhs, QualType rhs);
// CheckSingleAssignmentConstraints - Currently used by ActOnCallExpr,
// CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking,
// this routine performs the default function/array converions.
AssignConvertType CheckSingleAssignmentConstraints(QualType lhs,
Expr *&rExpr);
// CheckCompoundAssignmentConstraints - Type check without performing any
// conversions. For compound assignments, the "Check...Operands" methods
// perform the necessary conversions.
AssignConvertType CheckCompoundAssignmentConstraints(QualType lhs,
QualType rhs);
// Helper function for CheckAssignmentConstraints (C99 6.5.16.1p1)
AssignConvertType CheckPointerTypesForAssignment(QualType lhsType,
QualType rhsType);
/// the following "Check" methods will return a valid/converted QualType
/// or a null QualType (indicating an error diagnostic was issued).
/// type checking binary operators (subroutines of ActOnBinOp).
inline QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex);
inline QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex);
inline QualType CheckMultiplyDivideOperands( // C99 6.5.5
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckRemainderOperands( // C99 6.5.5
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckAdditionOperands( // C99 6.5.6
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckSubtractionOperands( // C99 6.5.6
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckShiftOperands( // C99 6.5.7
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckCompareOperands( // C99 6.5.8/9
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isRelational);
inline QualType CheckBitwiseOperands( // C99 6.5.[10...12]
Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false);
inline QualType CheckLogicalOperands( // C99 6.5.[13,14]
Expr *&lex, Expr *&rex, SourceLocation OpLoc);
// CheckAssignmentOperands is used for both simple and compound assignment.
// For simple assignment, pass both expressions and a null converted type.
// For compound assignment, pass both expressions and the converted type.
inline QualType CheckAssignmentOperands( // C99 6.5.16.[1,2]
Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType);
inline QualType CheckCommaOperands( // C99 6.5.17
Expr *&lex, Expr *&rex, SourceLocation OpLoc);
inline QualType CheckConditionalOperands( // C99 6.5.15
Expr *&cond, Expr *&lhs, Expr *&rhs, SourceLocation questionLoc);
/// type checking unary operators (subroutines of ActOnUnaryOp).
/// C99 6.5.3.1, 6.5.3.2, 6.5.3.4
QualType CheckIncrementDecrementOperand(Expr *op, SourceLocation OpLoc);
QualType CheckAddressOfOperand(Expr *op, SourceLocation OpLoc);
QualType CheckIndirectionOperand(Expr *op, SourceLocation OpLoc);
QualType CheckSizeOfAlignOfOperand(QualType type, SourceLocation loc,
bool isSizeof);
QualType CheckRealImagOperand(Expr *&Op, SourceLocation OpLoc);
/// type checking primary expressions.
QualType CheckExtVectorComponent(QualType baseType, SourceLocation OpLoc,
IdentifierInfo &Comp, SourceLocation CmpLoc);
/// type checking declaration initializers (C99 6.7.8)
friend class InitListChecker;
bool CheckInitializerTypes(Expr *&simpleInit_or_initList, QualType &declType);
bool CheckSingleInitializer(Expr *&simpleInit, QualType declType);
bool CheckForConstantInitializer(Expr *e, QualType t);
bool CheckArithmeticConstantExpression(const Expr* e);
bool CheckAddressConstantExpression(const Expr* e);
bool CheckAddressConstantExpressionLValue(const Expr* e);
StringLiteral *IsStringLiteralInit(Expr *Init, QualType DeclType);
bool CheckStringLiteralInit(StringLiteral *strLiteral, QualType &DeclT);
// CheckVectorCast - check type constraints for vectors.
// Since vectors are an extension, there are no C standard reference for this.
// We allow casting between vectors and integer datatypes of the same size.
// returns true if the cast is invalid
bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty);
// returns true if there were any incompatible arguments.
bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
ObjCMethodDecl *Method);
/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have
/// the specified width and sign. If an overflow occurs, detect it and emit
/// the specified diagnostic.
void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal,
unsigned NewWidth, bool NewSign,
SourceLocation Loc, unsigned DiagID);
bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS,
bool ForCompare);
void InitBuiltinVaListType();
// Helper method to turn variable array types into
// constant array types in certain situations which would otherwise
// be errors
QualType TryFixInvalidVariablyModifiedType(QualType T);
//===--------------------------------------------------------------------===//
// Extra semantic analysis beyond the C type system
private:
Action::ExprResult CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall);
bool CheckBuiltinCFStringArgument(Expr* Arg);
bool SemaBuiltinVAStart(CallExpr *TheCall);
bool SemaBuiltinUnorderedCompare(CallExpr *TheCall);
bool SemaBuiltinStackAddress(CallExpr *TheCall);
Action::ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall);
void CheckPrintfArguments(CallExpr *TheCall,
bool HasVAListArg, unsigned format_idx);
void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType,
SourceLocation ReturnLoc);
void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex);
};
class InitListChecker {
Sema *SemaRef;
bool hadError;
void CheckImplicitInitList(InitListExpr *ParentIList, QualType T,
unsigned &Index);
void CheckExplicitInitList(InitListExpr *IList, QualType &T,
unsigned &Index);
void CheckListElementTypes(InitListExpr *IList, QualType &DeclType,
unsigned &Index);
void CheckSubElementType(InitListExpr *IList, QualType ElemType,
unsigned &Index);
// FIXME: Does DeclType need to be a reference type?
void CheckScalarType(InitListExpr *IList, QualType &DeclType,
unsigned &Index);
void CheckVectorType(InitListExpr *IList, QualType DeclType, unsigned &Index);
void CheckStructUnionTypes(InitListExpr *IList, QualType DeclType,
unsigned &Index);
void CheckArrayType(InitListExpr *IList, QualType &DeclType, unsigned &Index);
int numArrayElements(QualType DeclType);
int numStructUnionElements(QualType DeclType);
public:
InitListChecker(Sema *S, InitListExpr *IL, QualType &T);
bool HadError() { return hadError; }
};
} // end namespace clang
#endif
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