forked from OSchip/llvm-project
630 lines
26 KiB
C++
630 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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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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SourceLocation AtLoc = AtLocs[0];
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StringLiteral* S = static_cast<StringLiteral *>(Strings[0]);
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if (NumStrings > 1) {
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// Concatenate objc strings.
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StringLiteral* ES = static_cast<StringLiteral *>(Strings[NumStrings-1]);
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SourceLocation EndLoc = ES->getSourceRange().getEnd();
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unsigned Length = 0;
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for (unsigned i = 0; i < NumStrings; i++)
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Length += static_cast<StringLiteral *>(Strings[i])->getByteLength();
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char *strBuf = new char [Length];
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char *p = strBuf;
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bool isWide = false;
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for (unsigned i = 0; i < NumStrings; i++) {
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S = static_cast<StringLiteral *>(Strings[i]);
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if (S->isWide())
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isWide = true;
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memcpy(p, S->getStrData(), S->getByteLength());
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p += S->getByteLength();
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S->Destroy(Context);
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}
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S = new (Context, 8) StringLiteral(Context, strBuf, Length, isWide,
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Context.getPointerType(Context.CharTy),
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AtLoc, EndLoc);
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}
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if (CheckBuiltinCFStringArgument(S))
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return true;
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if (Context.getObjCConstantStringInterface().isNull()) {
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// Initialize the constant string interface lazily. This assumes
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// the NSConstantString interface is seen in this translation unit.
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IdentifierInfo *NSIdent = &Context.Idents.get("NSConstantString");
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NamedDecl *IFace = LookupName(TUScope, NSIdent, LookupOrdinaryName);
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ObjCInterfaceDecl *strIFace = dyn_cast_or_null<ObjCInterfaceDecl>(IFace);
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if (strIFace)
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Context.setObjCConstantStringInterface(strIFace);
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}
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QualType t = Context.getObjCConstantStringInterface();
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// If there is no NSConstantString 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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if (t == QualType()) {
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t = Context.getObjCIdType();
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} else {
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t = Context.getPointerType(t);
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}
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return new (Context) ObjCStringLiteral(S, t, AtLoc);
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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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QualType t = Context.getPointerType(Context.CharTy);
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return new (Context) ObjCEncodeExpr(t, EncodedType, AtLoc, 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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QualType t = Context.getObjCSelType();
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return new (Context) ObjCSelectorExpr(t, 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 = ObjCProtocols[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 t = Context.getObjCProtoType();
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if (t.isNull())
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return true;
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t = Context.getPointerType(t);
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return new (Context) ObjCProtocolExpr(t, 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 anyIncompatibleArgs = 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->getParamDecl(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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anyIncompatibleArgs |=
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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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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 anyIncompatibleArgs;
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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.getPointerType(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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return Diag(receiverLoc, diag::err_invalid_receiver_to_message);
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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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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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if (ObjCImplementationDecl *ImpDecl =
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ObjCImplementations[ClassDecl->getIdentifier()])
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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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for (unsigned i = 0; i < ObjCCategoryImpls.size() && !Method; i++) {
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if (ObjCCategoryImpls[i]->getClassInterface() == ClassDecl)
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Method = ObjCCategoryImpls[i]->getClassMethod(Sel);
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}
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}
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}
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// Before we give up, check if the selector is an instance method.
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if (!Method)
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Method = ClassDecl->lookupInstanceMethod(Sel);
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if (Method && Method->getAttr<DeprecatedAttr>())
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Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
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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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// If we have the ObjCInterfaceDecl* for the class that is receiving
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// the message, use that to construct the ObjCMessageExpr. Otherwise
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// pass on the IdentifierInfo* for the class.
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// FIXME: need to do a better job handling 'super' usage within a class
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// For now, we simply pass the "super" identifier through (which isn't
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// consistent 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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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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}
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if (Method && Method->getAttr<DeprecatedAttr>())
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Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
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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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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 == Context.getCanonicalType(Context.getObjCIdType()) ||
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ReceiverCType->getAsBlockPointerType()) {
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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 = FactoryMethodPool[Sel].Method;
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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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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 == Context.getCanonicalType(Context.getObjCClassType())) {
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ObjCMethodDecl *Method = 0;
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if (ObjCMethodDecl *CurMeth = getCurMethodDecl()) {
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// If we have an implementation in scope, check "private" methods.
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if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
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if (ObjCImplementationDecl *ImpDecl =
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ObjCImplementations[ClassDecl->getIdentifier()])
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Method = ImpDecl->getClassMethod(Sel);
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if (Method && Method->getAttr<DeprecatedAttr>())
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Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
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}
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if (!Method)
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Method = FactoryMethodPool[Sel].Method;
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if (!Method)
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Method = LookupInstanceMethodInGlobalPool(
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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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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 (ObjCQualifiedIdType *QIT = dyn_cast<ObjCQualifiedIdType>(ReceiverCType)) {
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// Search protocols
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for (unsigned i = 0; i < QIT->getNumProtocols(); i++) {
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ObjCProtocolDecl *PDecl = QIT->getProtocols(i);
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if (PDecl && (Method = PDecl->lookupInstanceMethod(Sel)))
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break;
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}
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if (!Method)
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Diag(lbrac, diag::warn_method_not_found_in_protocol)
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<< Sel << RExpr->getSourceRange();
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} else if (const ObjCInterfaceType *OCIReceiver =
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ReceiverCType->getAsPointerToObjCInterfaceType()) {
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// We allow sending a message to a pointer to an interface (an object).
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ClassDecl = OCIReceiver->getDecl();
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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 (ObjCQualifiedIdType::qual_iterator QI = OCIReceiver->qual_begin(),
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E = OCIReceiver->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 && !OCIReceiver->qual_empty())
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Diag(lbrac, diag::warn_method_not_found_in_protocol)
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<< Sel << SourceRange(lbrac, rbrac);
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if (Method && Method->getAttr<DeprecatedAttr>())
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Diag(receiverLoc, diag::warn_deprecated) << Method->getDeclName();
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} else {
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Diag(lbrac, diag::error_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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// If we have an implementation in scope, check "private" methods.
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if (ClassDecl)
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if (ObjCImplementationDecl *ImpDecl =
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ObjCImplementations[ClassDecl->getIdentifier()])
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Method = ImpDecl->getInstanceMethod(Sel);
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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.
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if (!Method)
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Method = LookupInstanceMethodInGlobalPool(
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Sel, SourceRange(lbrac,rbrac));
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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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return new (Context) ObjCMessageExpr(RExpr, Sel, returnType, Method, lbrac,
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rbrac, ArgExprs, NumArgs);
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}
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//===----------------------------------------------------------------------===//
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// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's.
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//===----------------------------------------------------------------------===//
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/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the
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/// inheritance hierarchy of 'rProto'.
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static bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto,
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ObjCProtocolDecl *rProto) {
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if (lProto == rProto)
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return true;
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for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(),
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E = rProto->protocol_end(); PI != E; ++PI)
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if (ProtocolCompatibleWithProtocol(lProto, *PI))
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return true;
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return false;
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}
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/// ClassImplementsProtocol - Checks that 'lProto' protocol
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/// has been implemented in IDecl class, its super class or categories (if
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/// lookupCategory is true).
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static bool ClassImplementsProtocol(ObjCProtocolDecl *lProto,
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ObjCInterfaceDecl *IDecl,
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bool lookupCategory,
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bool RHSIsQualifiedID = false) {
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// 1st, look up the class.
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const ObjCList<ObjCProtocolDecl> &Protocols =
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IDecl->getReferencedProtocols();
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for (ObjCList<ObjCProtocolDecl>::iterator PI = Protocols.begin(),
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|
E = Protocols.end(); PI != E; ++PI) {
|
|
if (ProtocolCompatibleWithProtocol(lProto, *PI))
|
|
return true;
|
|
// This is dubious and is added to be compatible with gcc.
|
|
// In gcc, it is also allowed assigning a protocol-qualified 'id'
|
|
// type to a LHS object when protocol in qualified LHS is in list
|
|
// of protocols in the rhs 'id' object. This IMO, should be a bug.
|
|
// FIXME: Treat this as an extension, and flag this as an error when
|
|
// GCC extensions are not enabled.
|
|
if (RHSIsQualifiedID && ProtocolCompatibleWithProtocol(*PI, lProto))
|
|
return true;
|
|
}
|
|
|
|
// 2nd, look up the category.
|
|
if (lookupCategory)
|
|
for (ObjCCategoryDecl *CDecl = IDecl->getCategoryList(); CDecl;
|
|
CDecl = CDecl->getNextClassCategory()) {
|
|
for (ObjCCategoryDecl::protocol_iterator PI = CDecl->protocol_begin(),
|
|
E = CDecl->protocol_end(); PI != E; ++PI)
|
|
if (ProtocolCompatibleWithProtocol(lProto, *PI))
|
|
return true;
|
|
}
|
|
|
|
// 3rd, look up the super class(s)
|
|
if (IDecl->getSuperClass())
|
|
return
|
|
ClassImplementsProtocol(lProto, IDecl->getSuperClass(), lookupCategory,
|
|
RHSIsQualifiedID);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an
|
|
/// ObjCQualifiedIDType.
|
|
bool Sema::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs,
|
|
bool compare) {
|
|
// Allow id<P..> and an 'id' or void* type in all cases.
|
|
if (const PointerType *PT = lhs->getAsPointerType()) {
|
|
QualType PointeeTy = PT->getPointeeType();
|
|
if (Context.isObjCIdStructType(PointeeTy) || PointeeTy->isVoidType())
|
|
return true;
|
|
} else if (const PointerType *PT = rhs->getAsPointerType()) {
|
|
QualType PointeeTy = PT->getPointeeType();
|
|
if (Context.isObjCIdStructType(PointeeTy) || PointeeTy->isVoidType())
|
|
return true;
|
|
}
|
|
|
|
if (const ObjCQualifiedIdType *lhsQID = lhs->getAsObjCQualifiedIdType()) {
|
|
const ObjCQualifiedIdType *rhsQID = rhs->getAsObjCQualifiedIdType();
|
|
const ObjCQualifiedInterfaceType *rhsQI = 0;
|
|
QualType rtype;
|
|
|
|
if (!rhsQID) {
|
|
// Not comparing two ObjCQualifiedIdType's?
|
|
if (!rhs->isPointerType()) return false;
|
|
|
|
rtype = rhs->getAsPointerType()->getPointeeType();
|
|
rhsQI = rtype->getAsObjCQualifiedInterfaceType();
|
|
if (rhsQI == 0) {
|
|
// If the RHS is a unqualified interface pointer "NSString*",
|
|
// make sure we check the class hierarchy.
|
|
if (const ObjCInterfaceType *IT = rtype->getAsObjCInterfaceType()) {
|
|
ObjCInterfaceDecl *rhsID = IT->getDecl();
|
|
for (unsigned i = 0; i != lhsQID->getNumProtocols(); ++i) {
|
|
// when comparing an id<P> on lhs with a static type on rhs,
|
|
// see if static class implements all of id's protocols, directly or
|
|
// through its super class and categories.
|
|
if (!ClassImplementsProtocol(lhsQID->getProtocols(i), rhsID, true))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
ObjCQualifiedIdType::qual_iterator RHSProtoI, RHSProtoE;
|
|
if (rhsQI) { // We have a qualified interface (e.g. "NSObject<Proto> *").
|
|
RHSProtoI = rhsQI->qual_begin();
|
|
RHSProtoE = rhsQI->qual_end();
|
|
} else if (rhsQID) { // We have a qualified id (e.g. "id<Proto> *").
|
|
RHSProtoI = rhsQID->qual_begin();
|
|
RHSProtoE = rhsQID->qual_end();
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
for (unsigned i =0; i < lhsQID->getNumProtocols(); i++) {
|
|
ObjCProtocolDecl *lhsProto = lhsQID->getProtocols(i);
|
|
bool match = false;
|
|
|
|
// when comparing an id<P> on lhs with a static type on rhs,
|
|
// see if static class implements all of id's protocols, directly or
|
|
// through its super class and categories.
|
|
for (; RHSProtoI != RHSProtoE; ++RHSProtoI) {
|
|
ObjCProtocolDecl *rhsProto = *RHSProtoI;
|
|
if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) ||
|
|
(compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) {
|
|
match = true;
|
|
break;
|
|
}
|
|
}
|
|
if (rhsQI) {
|
|
// If the RHS is a qualified interface pointer "NSString<P>*",
|
|
// make sure we check the class hierarchy.
|
|
if (const ObjCInterfaceType *IT = rtype->getAsObjCInterfaceType()) {
|
|
ObjCInterfaceDecl *rhsID = IT->getDecl();
|
|
for (unsigned i = 0; i != lhsQID->getNumProtocols(); ++i) {
|
|
// when comparing an id<P> on lhs with a static type on rhs,
|
|
// see if static class implements all of id's protocols, directly or
|
|
// through its super class and categories.
|
|
if (ClassImplementsProtocol(lhsQID->getProtocols(i), rhsID, true)) {
|
|
match = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!match)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
const ObjCQualifiedIdType *rhsQID = rhs->getAsObjCQualifiedIdType();
|
|
assert(rhsQID && "One of the LHS/RHS should be id<x>");
|
|
|
|
if (!lhs->isPointerType())
|
|
return false;
|
|
|
|
QualType ltype = lhs->getAsPointerType()->getPointeeType();
|
|
if (const ObjCQualifiedInterfaceType *lhsQI =
|
|
ltype->getAsObjCQualifiedInterfaceType()) {
|
|
ObjCQualifiedIdType::qual_iterator LHSProtoI = lhsQI->qual_begin();
|
|
ObjCQualifiedIdType::qual_iterator LHSProtoE = lhsQI->qual_end();
|
|
for (; LHSProtoI != LHSProtoE; ++LHSProtoI) {
|
|
bool match = false;
|
|
ObjCProtocolDecl *lhsProto = *LHSProtoI;
|
|
for (unsigned j = 0; j < rhsQID->getNumProtocols(); j++) {
|
|
ObjCProtocolDecl *rhsProto = rhsQID->getProtocols(j);
|
|
if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) ||
|
|
(compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) {
|
|
match = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!match)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (const ObjCInterfaceType *IT = ltype->getAsObjCInterfaceType()) {
|
|
// for static type vs. qualified 'id' type, check that class implements
|
|
// all of 'id's protocols.
|
|
ObjCInterfaceDecl *lhsID = IT->getDecl();
|
|
for (unsigned j = 0; j < rhsQID->getNumProtocols(); j++) {
|
|
ObjCProtocolDecl *rhsProto = rhsQID->getProtocols(j);
|
|
if (!ClassImplementsProtocol(rhsProto, lhsID, compare, true))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|