Action::OwningExprResult
Sema::ActOnSelectorExpr(ExprArg BaseExpr, SourceLocation OpLoc,
SourceLocation IILoc, IdentifierInfo *II) {
Expr *Base = BaseExpr.takeAs<Expr>();
// Note: This will fail for all ExprEmpty()s getting passed in (atm for all
// numeric literals etc)
assert(Base && "no base expression");
// If base is a var, this is a lookup into its type (struct or interface)
// If base is a type, this could be a MethodExpr.
LookupResult R(*this, II, IILoc, LookupMemberName);
OwningExprResult BaseResult = Owned(Base);
OwningExprResult Result = LookupMemberExpr(R, *Base, OpLoc);
if (BaseResult.isInvalid())
return ExprError();
Base = BaseResult.takeAs<Expr>();
if (Result.isInvalid()) {
Owned(Base);
return ExprError();
}
if (Result.get()) {
return Result;
}
Result = BuildMemberReferenceExpr(Base, Base->getType(), OpLoc, R);
return Result;
}
bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
Selector Sel, ObjCMethodDecl *Method,
bool isClassMessage,
SourceLocation lbrac, SourceLocation rbrac,
QualType &ReturnType) {
if (!Method) {
// Apply default argument promotion as for (C99 6.5.2.2p6).
for (unsigned i = 0; i != NumArgs; i++) {
if (Args[i]->isTypeDependent())
continue;
DefaultArgumentPromotion(Args[i]);
}
unsigned DiagID = isClassMessage ? diag::warn_class_method_not_found :
diag::warn_inst_method_not_found;
Diag(lbrac, DiagID)
<< Sel << isClassMessage << SourceRange(lbrac, rbrac);
ReturnType = Context.getObjCIdType();
return false;
}
ReturnType = Method->getSendResultType();
unsigned NumNamedArgs = Sel.getNumArgs();
// Method might have more arguments than selector indicates. This is due
// to addition of c-style arguments in method.
if (Method->param_size() > Sel.getNumArgs())
NumNamedArgs = Method->param_size();
// FIXME. This need be cleaned up.
if (NumArgs < NumNamedArgs) {
Diag(lbrac, diag::err_typecheck_call_too_few_args) << 2
<< NumNamedArgs << NumArgs;
return false;
}
bool IsError = false;
for (unsigned i = 0; i < NumNamedArgs; i++) {
// We can't do any type-checking on a type-dependent argument.
if (Args[i]->isTypeDependent())
continue;
Expr *argExpr = Args[i];
ParmVarDecl *Param = Method->param_begin()[i];
assert(argExpr && "CheckMessageArgumentTypes(): missing expression");
if (RequireCompleteType(argExpr->getSourceRange().getBegin(),
Param->getType(),
PDiag(diag::err_call_incomplete_argument)
<< argExpr->getSourceRange()))
return true;
InitializedEntity Entity = InitializedEntity::InitializeParameter(Param);
OwningExprResult ArgE = PerformCopyInitialization(Entity,
SourceLocation(),
Owned(argExpr->Retain()));
if (ArgE.isInvalid())
IsError = true;
else
Args[i] = ArgE.takeAs<Expr>();
}
// Promote additional arguments to variadic methods.
if (Method->isVariadic()) {
for (unsigned i = NumNamedArgs; i < NumArgs; ++i) {
if (Args[i]->isTypeDependent())
continue;
IsError |= DefaultVariadicArgumentPromotion(Args[i], VariadicMethod, 0);
}
} else {
// Check for extra arguments to non-variadic methods.
if (NumArgs != NumNamedArgs) {
Diag(Args[NumNamedArgs]->getLocStart(),
diag::err_typecheck_call_too_many_args)
<< 2 /*method*/ << NumNamedArgs << NumArgs
<< Method->getSourceRange()
<< SourceRange(Args[NumNamedArgs]->getLocStart(),
Args[NumArgs-1]->getLocEnd());
}
}
DiagnoseSentinelCalls(Method, lbrac, Args, NumArgs);
return IsError;
}