forked from OSchip/llvm-project
654 lines
26 KiB
C++
654 lines
26 KiB
C++
//===--- SemaExprObjC.cpp - Semantic Analysis for ObjC Expressions --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements semantic analysis for Objective-C expressions.
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//
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//===----------------------------------------------------------------------===//
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#include "Sema.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/ExprObjC.h"
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#include "llvm/ADT/SmallString.h"
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#include "clang/Lex/Preprocessor.h"
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using namespace clang;
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Sema::ExprResult Sema::ParseObjCStringLiteral(SourceLocation *AtLocs,
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ExprTy **strings,
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unsigned NumStrings) {
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StringLiteral **Strings = reinterpret_cast<StringLiteral**>(strings);
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// Most ObjC strings are formed out of a single piece. However, we *can*
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// have strings formed out of multiple @ strings with multiple pptokens in
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// each one, e.g. @"foo" "bar" @"baz" "qux" which need to be turned into one
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// StringLiteral for ObjCStringLiteral to hold onto.
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StringLiteral *S = Strings[0];
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// If we have a multi-part string, merge it all together.
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if (NumStrings != 1) {
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// Concatenate objc strings.
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llvm::SmallString<128> StrBuf;
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llvm::SmallVector<SourceLocation, 8> StrLocs;
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for (unsigned i = 0; i != NumStrings; ++i) {
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S = Strings[i];
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// ObjC strings can't be wide.
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if (S->isWide()) {
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Diag(S->getLocStart(), diag::err_cfstring_literal_not_string_constant)
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<< S->getSourceRange();
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return true;
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}
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// Get the string data.
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StrBuf.append(S->getStrData(), S->getStrData()+S->getByteLength());
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// Get the locations of the string tokens.
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StrLocs.append(S->tokloc_begin(), S->tokloc_end());
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// Free the temporary string.
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S->Destroy(Context);
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}
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// Create the aggregate string with the appropriate content and location
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// information.
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S = StringLiteral::Create(Context, &StrBuf[0], StrBuf.size(), false,
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Context.getPointerType(Context.CharTy),
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&StrLocs[0], StrLocs.size());
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}
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// Verify that this composite string is acceptable for ObjC strings.
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if (CheckObjCString(S))
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return true;
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// Initialize the constant string interface lazily. This assumes
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// the NSString interface is seen in this translation unit. Note: We
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// don't use NSConstantString, since the runtime team considers this
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// interface private (even though it appears in the header files).
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QualType Ty = Context.getObjCConstantStringInterface();
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if (!Ty.isNull()) {
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Ty = Context.getObjCObjectPointerType(Ty);
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} else {
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IdentifierInfo *NSIdent = &Context.Idents.get("NSString");
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NamedDecl *IF = LookupName(TUScope, NSIdent, LookupOrdinaryName);
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if (ObjCInterfaceDecl *StrIF = dyn_cast_or_null<ObjCInterfaceDecl>(IF)) {
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Context.setObjCConstantStringInterface(StrIF);
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Ty = Context.getObjCConstantStringInterface();
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Ty = Context.getObjCObjectPointerType(Ty);
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} else {
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// If there is no NSString interface defined then treat constant
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// strings as untyped objects and let the runtime figure it out later.
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Ty = Context.getObjCIdType();
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}
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}
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return new (Context) ObjCStringLiteral(S, Ty, AtLocs[0]);
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}
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Expr *Sema::BuildObjCEncodeExpression(SourceLocation AtLoc,
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QualType EncodedType,
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SourceLocation RParenLoc) {
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QualType StrTy;
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if (EncodedType->isDependentType())
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StrTy = Context.DependentTy;
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else {
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std::string Str;
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Context.getObjCEncodingForType(EncodedType, Str);
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// The type of @encode is the same as the type of the corresponding string,
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// which is an array type.
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StrTy = Context.CharTy;
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// A C++ string literal has a const-qualified element type (C++ 2.13.4p1).
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if (getLangOptions().CPlusPlus)
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StrTy.addConst();
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StrTy = Context.getConstantArrayType(StrTy, llvm::APInt(32, Str.size()+1),
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ArrayType::Normal, 0);
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}
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return new (Context) ObjCEncodeExpr(StrTy, EncodedType, AtLoc, RParenLoc);
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}
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Sema::ExprResult Sema::ParseObjCEncodeExpression(SourceLocation AtLoc,
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SourceLocation EncodeLoc,
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SourceLocation LParenLoc,
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TypeTy *ty,
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SourceLocation RParenLoc) {
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QualType EncodedType = QualType::getFromOpaquePtr(ty);
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return BuildObjCEncodeExpression(AtLoc, EncodedType, RParenLoc);
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}
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Sema::ExprResult Sema::ParseObjCSelectorExpression(Selector Sel,
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SourceLocation AtLoc,
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SourceLocation SelLoc,
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SourceLocation LParenLoc,
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SourceLocation RParenLoc) {
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ObjCMethodDecl *Method = LookupInstanceMethodInGlobalPool(Sel,
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SourceRange(LParenLoc, RParenLoc));
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if (!Method)
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Method = LookupFactoryMethodInGlobalPool(Sel,
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SourceRange(LParenLoc, RParenLoc));
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if (!Method)
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Diag(SelLoc, diag::warn_undeclared_selector) << Sel;
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QualType Ty = Context.getObjCSelType();
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return new (Context) ObjCSelectorExpr(Ty, Sel, AtLoc, RParenLoc);
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}
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Sema::ExprResult Sema::ParseObjCProtocolExpression(IdentifierInfo *ProtocolId,
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SourceLocation AtLoc,
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SourceLocation ProtoLoc,
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SourceLocation LParenLoc,
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SourceLocation RParenLoc) {
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ObjCProtocolDecl* PDecl = LookupProtocol(ProtocolId);
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if (!PDecl) {
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Diag(ProtoLoc, diag::err_undeclared_protocol) << ProtocolId;
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return true;
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}
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QualType Ty = Context.getObjCProtoType();
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if (Ty.isNull())
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return true;
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Ty = Context.getObjCObjectPointerType(Ty);
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return new (Context) ObjCProtocolExpr(Ty, PDecl, AtLoc, RParenLoc);
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}
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bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
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Selector Sel, ObjCMethodDecl *Method,
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bool isClassMessage,
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SourceLocation lbrac, SourceLocation rbrac,
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QualType &ReturnType) {
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if (!Method) {
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// Apply default argument promotion as for (C99 6.5.2.2p6).
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for (unsigned i = 0; i != NumArgs; i++)
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DefaultArgumentPromotion(Args[i]);
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unsigned DiagID = isClassMessage ? diag::warn_class_method_not_found :
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diag::warn_inst_method_not_found;
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Diag(lbrac, DiagID)
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<< Sel << isClassMessage << SourceRange(lbrac, rbrac);
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ReturnType = Context.getObjCIdType();
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return false;
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}
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ReturnType = Method->getResultType();
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unsigned NumNamedArgs = Sel.getNumArgs();
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assert(NumArgs >= NumNamedArgs && "Too few arguments for selector!");
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bool IsError = false;
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for (unsigned i = 0; i < NumNamedArgs; i++) {
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Expr *argExpr = Args[i];
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assert(argExpr && "CheckMessageArgumentTypes(): missing expression");
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QualType lhsType = Method->param_begin()[i]->getType();
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QualType rhsType = argExpr->getType();
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// If necessary, apply function/array conversion. C99 6.7.5.3p[7,8].
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if (lhsType->isArrayType())
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lhsType = Context.getArrayDecayedType(lhsType);
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else if (lhsType->isFunctionType())
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lhsType = Context.getPointerType(lhsType);
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AssignConvertType Result =
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CheckSingleAssignmentConstraints(lhsType, argExpr);
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if (Args[i] != argExpr) // The expression was converted.
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Args[i] = argExpr; // Make sure we store the converted expression.
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IsError |=
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DiagnoseAssignmentResult(Result, argExpr->getLocStart(), lhsType, rhsType,
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argExpr, "sending");
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}
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// Promote additional arguments to variadic methods.
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if (Method->isVariadic()) {
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for (unsigned i = NumNamedArgs; i < NumArgs; ++i)
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IsError |= DefaultVariadicArgumentPromotion(Args[i], VariadicMethod);
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} else {
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// Check for extra arguments to non-variadic methods.
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if (NumArgs != NumNamedArgs) {
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Diag(Args[NumNamedArgs]->getLocStart(),
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diag::err_typecheck_call_too_many_args)
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<< 2 /*method*/ << Method->getSourceRange()
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<< SourceRange(Args[NumNamedArgs]->getLocStart(),
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Args[NumArgs-1]->getLocEnd());
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}
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}
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return IsError;
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}
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bool Sema::isSelfExpr(Expr *RExpr) {
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if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(RExpr))
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if (DRE->getDecl()->getIdentifier() == &Context.Idents.get("self"))
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return true;
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return false;
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}
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// Helper method for ActOnClassMethod/ActOnInstanceMethod.
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// Will search "local" class/category implementations for a method decl.
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// If failed, then we search in class's root for an instance method.
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// Returns 0 if no method is found.
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ObjCMethodDecl *Sema::LookupPrivateClassMethod(Selector Sel,
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ObjCInterfaceDecl *ClassDecl) {
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ObjCMethodDecl *Method = 0;
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// lookup in class and all superclasses
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while (ClassDecl && !Method) {
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if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
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Method = ImpDecl->getClassMethod(Sel);
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// Look through local category implementations associated with the class.
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if (!Method)
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Method = ClassDecl->getCategoryClassMethod(Sel);
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// Before we give up, check if the selector is an instance method.
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// But only in the root. This matches gcc's behaviour and what the
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// runtime expects.
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if (!Method && !ClassDecl->getSuperClass()) {
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Method = ClassDecl->lookupInstanceMethod(Sel);
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// Look through local category implementations associated
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// with the root class.
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if (!Method)
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Method = LookupPrivateInstanceMethod(Sel, ClassDecl);
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}
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ClassDecl = ClassDecl->getSuperClass();
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}
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return Method;
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}
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ObjCMethodDecl *Sema::LookupPrivateInstanceMethod(Selector Sel,
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ObjCInterfaceDecl *ClassDecl) {
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ObjCMethodDecl *Method = 0;
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while (ClassDecl && !Method) {
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// If we have implementations in scope, check "private" methods.
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if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
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Method = ImpDecl->getInstanceMethod(Sel);
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// Look through local category implementations associated with the class.
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if (!Method)
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Method = ClassDecl->getCategoryInstanceMethod(Sel);
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ClassDecl = ClassDecl->getSuperClass();
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}
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return Method;
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}
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Action::OwningExprResult Sema::ActOnClassPropertyRefExpr(
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IdentifierInfo &receiverName,
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IdentifierInfo &propertyName,
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SourceLocation &receiverNameLoc,
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SourceLocation &propertyNameLoc) {
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ObjCInterfaceDecl *IFace = getObjCInterfaceDecl(&receiverName);
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// Search for a declared property first.
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Selector Sel = PP.getSelectorTable().getNullarySelector(&propertyName);
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ObjCMethodDecl *Getter = IFace->lookupClassMethod(Sel);
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// If this reference is in an @implementation, check for 'private' methods.
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if (!Getter)
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if (ObjCMethodDecl *CurMeth = getCurMethodDecl())
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if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
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if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
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Getter = ImpDecl->getClassMethod(Sel);
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if (Getter) {
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// FIXME: refactor/share with ActOnMemberReference().
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// Check if we can reference this property.
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if (DiagnoseUseOfDecl(Getter, propertyNameLoc))
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return ExprError();
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}
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// Look for the matching setter, in case it is needed.
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Selector SetterSel =
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SelectorTable::constructSetterName(PP.getIdentifierTable(),
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PP.getSelectorTable(), &propertyName);
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ObjCMethodDecl *Setter = IFace->lookupClassMethod(SetterSel);
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if (!Setter) {
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// If this reference is in an @implementation, also check for 'private'
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// methods.
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if (ObjCMethodDecl *CurMeth = getCurMethodDecl())
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if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
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if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
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Setter = ImpDecl->getClassMethod(SetterSel);
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}
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// Look through local category implementations associated with the class.
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if (!Setter)
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Setter = IFace->getCategoryClassMethod(SetterSel);
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if (Setter && DiagnoseUseOfDecl(Setter, propertyNameLoc))
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return ExprError();
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if (Getter || Setter) {
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QualType PType;
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if (Getter)
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PType = Getter->getResultType();
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else {
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for (ObjCMethodDecl::param_iterator PI = Setter->param_begin(),
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E = Setter->param_end(); PI != E; ++PI)
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PType = (*PI)->getType();
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}
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return Owned(new (Context) ObjCKVCRefExpr(Getter, PType, Setter,
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propertyNameLoc, IFace, receiverNameLoc));
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}
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return ExprError(Diag(propertyNameLoc, diag::err_property_not_found)
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<< &propertyName << Context.getObjCInterfaceType(IFace));
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}
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// ActOnClassMessage - used for both unary and keyword messages.
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// ArgExprs is optional - if it is present, the number of expressions
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// is obtained from Sel.getNumArgs().
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Sema::ExprResult Sema::ActOnClassMessage(
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Scope *S,
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IdentifierInfo *receiverName, Selector Sel,
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SourceLocation lbrac, SourceLocation receiverLoc,
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SourceLocation selectorLoc, SourceLocation rbrac,
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ExprTy **Args, unsigned NumArgs)
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{
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assert(receiverName && "missing receiver class name");
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Expr **ArgExprs = reinterpret_cast<Expr **>(Args);
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ObjCInterfaceDecl* ClassDecl = 0;
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bool isSuper = false;
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if (receiverName->isStr("super")) {
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if (getCurMethodDecl()) {
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isSuper = true;
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ObjCInterfaceDecl *OID = getCurMethodDecl()->getClassInterface();
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if (!OID)
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return Diag(lbrac, diag::error_no_super_class_message)
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<< getCurMethodDecl()->getDeclName();
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ClassDecl = OID->getSuperClass();
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if (!ClassDecl)
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return Diag(lbrac, diag::error_no_super_class) << OID->getDeclName();
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if (getCurMethodDecl()->isInstanceMethod()) {
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QualType superTy = Context.getObjCInterfaceType(ClassDecl);
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superTy = Context.getObjCObjectPointerType(superTy);
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ExprResult ReceiverExpr = new (Context) ObjCSuperExpr(SourceLocation(),
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superTy);
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// We are really in an instance method, redirect.
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return ActOnInstanceMessage(ReceiverExpr.get(), Sel, lbrac,
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selectorLoc, rbrac, Args, NumArgs);
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}
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// We are sending a message to 'super' within a class method. Do nothing,
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// the receiver will pass through as 'super' (how convenient:-).
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} else {
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// 'super' has been used outside a method context. If a variable named
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// 'super' has been declared, redirect. If not, produce a diagnostic.
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NamedDecl *SuperDecl = LookupName(S, receiverName, LookupOrdinaryName);
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ValueDecl *VD = dyn_cast_or_null<ValueDecl>(SuperDecl);
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if (VD) {
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ExprResult ReceiverExpr = new (Context) DeclRefExpr(VD, VD->getType(),
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receiverLoc);
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// We are really in an instance method, redirect.
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return ActOnInstanceMessage(ReceiverExpr.get(), Sel, lbrac,
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selectorLoc, rbrac, Args, NumArgs);
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}
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return Diag(receiverLoc, diag::err_undeclared_var_use) << receiverName;
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}
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} else
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ClassDecl = getObjCInterfaceDecl(receiverName);
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// The following code allows for the following GCC-ism:
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//
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// typedef XCElementDisplayRect XCElementGraphicsRect;
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//
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// @implementation XCRASlice
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// - whatever { // Note that XCElementGraphicsRect is a typedef name.
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// _sGraphicsDelegate =[[XCElementGraphicsRect alloc] init];
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// }
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//
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// If necessary, the following lookup could move to getObjCInterfaceDecl().
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if (!ClassDecl) {
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NamedDecl *IDecl = LookupName(TUScope, receiverName, LookupOrdinaryName);
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if (TypedefDecl *OCTD = dyn_cast_or_null<TypedefDecl>(IDecl)) {
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const ObjCInterfaceType *OCIT;
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OCIT = OCTD->getUnderlyingType()->getAsObjCInterfaceType();
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if (!OCIT) {
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Diag(receiverLoc, diag::err_invalid_receiver_to_message);
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return true;
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}
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ClassDecl = OCIT->getDecl();
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}
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}
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assert(ClassDecl && "missing interface declaration");
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ObjCMethodDecl *Method = 0;
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QualType returnType;
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if (ClassDecl->isForwardDecl()) {
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// A forward class used in messaging is tread as a 'Class'
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Diag(lbrac, diag::warn_receiver_forward_class) << ClassDecl->getDeclName();
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Method = LookupFactoryMethodInGlobalPool(Sel, SourceRange(lbrac,rbrac));
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if (Method)
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Diag(Method->getLocation(), diag::note_method_sent_forward_class)
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<< Method->getDeclName();
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}
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if (!Method)
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Method = ClassDecl->lookupClassMethod(Sel);
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// If we have an implementation in scope, check "private" methods.
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if (!Method)
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Method = LookupPrivateClassMethod(Sel, ClassDecl);
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if (Method && DiagnoseUseOfDecl(Method, receiverLoc))
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return true;
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if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, true,
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lbrac, rbrac, returnType))
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return true;
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returnType = returnType.getNonReferenceType();
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// If we have the ObjCInterfaceDecl* for the class that is receiving the
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// message, use that to construct the ObjCMessageExpr. Otherwise pass on the
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// IdentifierInfo* for the class.
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// FIXME: need to do a better job handling 'super' usage within a class. For
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// now, we simply pass the "super" identifier through (which isn't consistent
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// with instance methods.
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if (isSuper)
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return new (Context) ObjCMessageExpr(receiverName, Sel, returnType, Method,
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lbrac, rbrac, ArgExprs, NumArgs);
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else
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return new (Context) ObjCMessageExpr(ClassDecl, Sel, returnType, Method,
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lbrac, rbrac, ArgExprs, NumArgs);
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}
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// ActOnInstanceMessage - used for both unary and keyword messages.
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// ArgExprs is optional - if it is present, the number of expressions
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// is obtained from Sel.getNumArgs().
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Sema::ExprResult Sema::ActOnInstanceMessage(ExprTy *receiver, Selector Sel,
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SourceLocation lbrac,
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SourceLocation receiverLoc,
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SourceLocation rbrac,
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ExprTy **Args, unsigned NumArgs) {
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assert(receiver && "missing receiver expression");
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Expr **ArgExprs = reinterpret_cast<Expr **>(Args);
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Expr *RExpr = static_cast<Expr *>(receiver);
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// If necessary, apply function/array conversion to the receiver.
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// C99 6.7.5.3p[7,8].
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DefaultFunctionArrayConversion(RExpr);
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QualType returnType;
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QualType ReceiverCType =
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Context.getCanonicalType(RExpr->getType()).getUnqualifiedType();
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// Handle messages to 'super'.
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if (isa<ObjCSuperExpr>(RExpr)) {
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ObjCMethodDecl *Method = 0;
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if (ObjCMethodDecl *CurMeth = getCurMethodDecl()) {
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// If we have an interface in scope, check 'super' methods.
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if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
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if (ObjCInterfaceDecl *SuperDecl = ClassDecl->getSuperClass()) {
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Method = SuperDecl->lookupInstanceMethod(Sel);
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if (!Method)
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// If we have implementations in scope, check "private" methods.
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Method = LookupPrivateInstanceMethod(Sel, SuperDecl);
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}
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}
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if (Method && DiagnoseUseOfDecl(Method, receiverLoc))
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return true;
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if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, false,
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lbrac, rbrac, returnType))
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return true;
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returnType = returnType.getNonReferenceType();
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return new (Context) ObjCMessageExpr(RExpr, Sel, returnType, Method, lbrac,
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rbrac, ArgExprs, NumArgs);
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}
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// Handle messages to id.
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if (ReceiverCType->isObjCIdType() || ReceiverCType->isBlockPointerType() ||
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Context.isObjCNSObjectType(RExpr->getType())) {
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ObjCMethodDecl *Method = LookupInstanceMethodInGlobalPool(
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Sel, SourceRange(lbrac,rbrac));
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if (!Method)
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Method = LookupFactoryMethodInGlobalPool(Sel, SourceRange(lbrac, rbrac));
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if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, false,
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lbrac, rbrac, returnType))
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return true;
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returnType = returnType.getNonReferenceType();
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return new (Context) ObjCMessageExpr(RExpr, Sel, returnType, Method, lbrac,
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rbrac, ArgExprs, NumArgs);
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}
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// Handle messages to Class.
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if (ReceiverCType->isObjCClassType() ||
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ReceiverCType->isObjCQualifiedClassType()) {
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ObjCMethodDecl *Method = 0;
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if (ObjCMethodDecl *CurMeth = getCurMethodDecl()) {
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if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface()) {
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// First check the public methods in the class interface.
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Method = ClassDecl->lookupClassMethod(Sel);
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if (!Method)
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Method = LookupPrivateClassMethod(Sel, ClassDecl);
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// FIXME: if we still haven't found a method, we need to look in
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// protocols (if we have qualifiers).
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}
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if (Method && DiagnoseUseOfDecl(Method, receiverLoc))
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return true;
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}
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if (!Method) {
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// If not messaging 'self', look for any factory method named 'Sel'.
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if (!isSelfExpr(RExpr)) {
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Method = LookupFactoryMethodInGlobalPool(Sel, SourceRange(lbrac,rbrac));
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if (!Method) {
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// If no class (factory) method was found, check if an _instance_
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// method of the same name exists in the root class only.
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Method = LookupInstanceMethodInGlobalPool(
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Sel, SourceRange(lbrac,rbrac));
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if (Method)
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if (const ObjCInterfaceDecl *ID =
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dyn_cast<ObjCInterfaceDecl>(Method->getDeclContext())) {
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if (ID->getSuperClass())
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Diag(lbrac, diag::warn_root_inst_method_not_found)
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<< Sel << SourceRange(lbrac, rbrac);
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}
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}
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}
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}
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if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, false,
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lbrac, rbrac, returnType))
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return true;
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returnType = returnType.getNonReferenceType();
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return new (Context) ObjCMessageExpr(RExpr, Sel, returnType, Method, lbrac,
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rbrac, ArgExprs, NumArgs);
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}
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ObjCMethodDecl *Method = 0;
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ObjCInterfaceDecl* ClassDecl = 0;
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// We allow sending a message to a qualified ID ("id<foo>"), which is ok as
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// long as one of the protocols implements the selector (if not, warn).
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if (const ObjCObjectPointerType *QIdTy =
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ReceiverCType->getAsObjCQualifiedIdType()) {
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// Search protocols for instance methods.
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for (ObjCObjectPointerType::qual_iterator I = QIdTy->qual_begin(),
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E = QIdTy->qual_end(); I != E; ++I) {
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ObjCProtocolDecl *PDecl = *I;
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if (PDecl && (Method = PDecl->lookupInstanceMethod(Sel)))
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break;
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// Since we aren't supporting "Class<foo>", look for a class method.
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if (PDecl && (Method = PDecl->lookupClassMethod(Sel)))
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break;
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}
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} else if (const ObjCObjectPointerType *OCIType =
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ReceiverCType->getAsObjCInterfacePointerType()) {
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// We allow sending a message to a pointer to an interface (an object).
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ClassDecl = OCIType->getInterfaceDecl();
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// FIXME: consider using LookupInstanceMethodInGlobalPool, since it will be
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// faster than the following method (which can do *many* linear searches).
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// The idea is to add class info to InstanceMethodPool.
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Method = ClassDecl->lookupInstanceMethod(Sel);
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if (!Method) {
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// Search protocol qualifiers.
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for (ObjCObjectPointerType::qual_iterator QI = OCIType->qual_begin(),
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E = OCIType->qual_end(); QI != E; ++QI) {
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if ((Method = (*QI)->lookupInstanceMethod(Sel)))
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break;
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}
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}
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if (!Method) {
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// If we have implementations in scope, check "private" methods.
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Method = LookupPrivateInstanceMethod(Sel, ClassDecl);
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if (!Method && !isSelfExpr(RExpr)) {
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// If we still haven't found a method, look in the global pool. This
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// behavior isn't very desirable, however we need it for GCC
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// compatibility. FIXME: should we deviate??
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if (OCIType->qual_empty()) {
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Method = LookupInstanceMethodInGlobalPool(
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Sel, SourceRange(lbrac,rbrac));
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if (Method && !OCIType->getInterfaceDecl()->isForwardDecl())
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Diag(lbrac, diag::warn_maynot_respond)
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<< OCIType->getInterfaceDecl()->getIdentifier()->getName() << Sel;
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}
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}
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}
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if (Method && DiagnoseUseOfDecl(Method, receiverLoc))
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return true;
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} else if (!Context.getObjCIdType().isNull() &&
|
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(ReceiverCType->isPointerType() ||
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(ReceiverCType->isIntegerType() &&
|
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ReceiverCType->isScalarType()))) {
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// Implicitly convert integers and pointers to 'id' but emit a warning.
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Diag(lbrac, diag::warn_bad_receiver_type)
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<< RExpr->getType() << RExpr->getSourceRange();
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ImpCastExprToType(RExpr, Context.getObjCIdType());
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} else {
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// Reject other random receiver types (e.g. structs).
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Diag(lbrac, diag::err_bad_receiver_type)
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<< RExpr->getType() << RExpr->getSourceRange();
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return true;
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}
|
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|
|
if (Method)
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DiagnoseSentinelCalls(Method, receiverLoc, ArgExprs, NumArgs);
|
|
if (CheckMessageArgumentTypes(ArgExprs, NumArgs, Sel, Method, false,
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lbrac, rbrac, returnType))
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|
return true;
|
|
returnType = returnType.getNonReferenceType();
|
|
return new (Context) ObjCMessageExpr(RExpr, Sel, returnType, Method, lbrac,
|
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rbrac, ArgExprs, NumArgs);
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|
}
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