return X == Y;
}
-static Sema::TemplateDeductionResult
-DeduceTemplateArguments(Sema &S,
- TemplateParameterList *TemplateParams,
- const TemplateArgument &Param,
- TemplateArgument Arg,
- TemplateDeductionInfo &Info,
- SmallVectorImpl<DeducedTemplateArgument> &Deduced);
-
-static Sema::TemplateDeductionResult
-DeduceTemplateArgumentsByTypeMatch(Sema &S,
- TemplateParameterList *TemplateParams,
- QualType Param,
- QualType Arg,
- TemplateDeductionInfo &Info,
- SmallVectorImpl<DeducedTemplateArgument> &
- Deduced,
- unsigned TDF,
- bool PartialOrdering = false,
- bool DeducedFromArrayBound = false);
+static Sema::TemplateDeductionResult DeduceTemplateArgumentsByTypeMatch(
+ Sema &S, TemplateParameterList *TemplateParams, QualType Param,
+ QualType Arg, TemplateDeductionInfo &Info,
+ SmallVectorImpl<DeducedTemplateArgument> &Deduced, unsigned TDF,
+ bool PartialOrdering = false, bool DeducedFromArrayBound = false);
static Sema::TemplateDeductionResult
DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams,
- ArrayRef<TemplateArgument> Params,
- ArrayRef<TemplateArgument> Args,
+ ArrayRef<TemplateArgument> Ps,
+ ArrayRef<TemplateArgument> As,
TemplateDeductionInfo &Info,
SmallVectorImpl<DeducedTemplateArgument> &Deduced,
bool NumberOfArgumentsMustMatch);
/// "success" result means that template argument deduction has not yet failed,
/// but it may still fail, later, for other reasons.
static Sema::TemplateDeductionResult
-DeduceTemplateArguments(Sema &S,
- TemplateParameterList *TemplateParams,
- const TemplateSpecializationType *Param,
- QualType Arg,
- TemplateDeductionInfo &Info,
- SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
- assert(Arg.isCanonical() && "Argument type must be canonical");
-
+DeduceTemplateSpecArguments(Sema &S, TemplateParameterList *TemplateParams,
+ const QualType P, QualType A,
+ TemplateDeductionInfo &Info,
+ SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
+ QualType UP = P;
+ if (const auto *IP = P->getAs<InjectedClassNameType>())
+ UP = IP->getInjectedSpecializationType();
+ // FIXME: Try to preserve type sugar here, which is hard
+ // because of the unresolved template arguments.
+ const auto *TP = UP.getCanonicalType()->castAs<TemplateSpecializationType>();
+ ArrayRef<TemplateArgument> PResolved = TP->template_arguments();
+
+ QualType UA = A;
// Treat an injected-class-name as its underlying template-id.
- if (auto *Injected = dyn_cast<InjectedClassNameType>(Arg))
- Arg = Injected->getInjectedSpecializationType();
+ if (const auto *Injected = A->getAs<InjectedClassNameType>())
+ UA = Injected->getInjectedSpecializationType();
// Check whether the template argument is a dependent template-id.
- if (const TemplateSpecializationType *SpecArg
- = dyn_cast<TemplateSpecializationType>(Arg)) {
+ // FIXME: Should not lose sugar here.
+ if (const auto *SA =
+ dyn_cast<TemplateSpecializationType>(UA.getCanonicalType())) {
// Perform template argument deduction for the template name.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArguments(S, TemplateParams,
- Param->getTemplateName(),
- SpecArg->getTemplateName(),
- Info, Deduced))
+ if (auto Result =
+ DeduceTemplateArguments(S, TemplateParams, TP->getTemplateName(),
+ SA->getTemplateName(), Info, Deduced))
return Result;
-
-
// Perform template argument deduction on each template
// argument. Ignore any missing/extra arguments, since they could be
// filled in by default arguments.
- return DeduceTemplateArguments(S, TemplateParams,
- Param->template_arguments(),
- SpecArg->template_arguments(), Info, Deduced,
+ return DeduceTemplateArguments(S, TemplateParams, PResolved,
+ SA->template_arguments(), Info, Deduced,
/*NumberOfArgumentsMustMatch=*/false);
}
// If the argument type is a class template specialization, we
// perform template argument deduction using its template
// arguments.
- const RecordType *RecordArg = dyn_cast<RecordType>(Arg);
- if (!RecordArg) {
- Info.FirstArg = TemplateArgument(QualType(Param, 0));
- Info.SecondArg = TemplateArgument(Arg);
- return Sema::TDK_NonDeducedMismatch;
- }
-
- ClassTemplateSpecializationDecl *SpecArg
- = dyn_cast<ClassTemplateSpecializationDecl>(RecordArg->getDecl());
- if (!SpecArg) {
- Info.FirstArg = TemplateArgument(QualType(Param, 0));
- Info.SecondArg = TemplateArgument(Arg);
+ const auto *RA = UA->getAs<RecordType>();
+ const auto *SA =
+ RA ? dyn_cast<ClassTemplateSpecializationDecl>(RA->getDecl()) : nullptr;
+ if (!SA) {
+ Info.FirstArg = TemplateArgument(P);
+ Info.SecondArg = TemplateArgument(A);
return Sema::TDK_NonDeducedMismatch;
}
// Perform template argument deduction for the template name.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArguments(S,
- TemplateParams,
- Param->getTemplateName(),
- TemplateName(SpecArg->getSpecializedTemplate()),
- Info, Deduced))
+ if (auto Result = DeduceTemplateArguments(
+ S, TemplateParams, TP->getTemplateName(),
+ TemplateName(SA->getSpecializedTemplate()), Info, Deduced))
return Result;
// Perform template argument deduction for the template arguments.
- return DeduceTemplateArguments(S, TemplateParams, Param->template_arguments(),
- SpecArg->getTemplateArgs().asArray(), Info,
- Deduced, /*NumberOfArgumentsMustMatch=*/true);
+ return DeduceTemplateArguments(S, TemplateParams, PResolved,
+ SA->getTemplateArgs().asArray(), Info, Deduced,
+ /*NumberOfArgumentsMustMatch=*/true);
}
/// Determines whether the given type is an opaque type that
return Sema::TDK_MiscellaneousDeductionFailure;
}
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- Params[ParamIdx], Args[ArgIdx],
- Info, Deduced, TDF,
- PartialOrdering))
+ if (Sema::TemplateDeductionResult Result =
+ DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, Params[ParamIdx].getUnqualifiedType(),
+ Args[ArgIdx].getUnqualifiedType(), Info, Deduced, TDF,
+ PartialOrdering,
+ /*DeducedFromArrayBound=*/false))
return Result;
++ArgIdx;
if (ParamIdx + 1 == NumParams || PackScope.hasFixedArity()) {
for (; ArgIdx < NumArgs && PackScope.hasNextElement(); ++ArgIdx) {
// Deduce template arguments from the pattern.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, Pattern,
- Args[ArgIdx], Info, Deduced,
- TDF, PartialOrdering))
+ if (Sema::TemplateDeductionResult Result =
+ DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, Pattern.getUnqualifiedType(),
+ Args[ArgIdx].getUnqualifiedType(), Info, Deduced, TDF,
+ PartialOrdering, /*DeducedFromArrayBound=*/false))
return Result;
PackScope.nextPackElement();
/// function types (noreturn adjustment, implicit calling conventions). If any
/// of parameter and argument is not a function, just perform type comparison.
///
-/// \param Param the template parameter type.
+/// \param P the template parameter type.
///
-/// \param Arg the argument type.
-bool Sema::isSameOrCompatibleFunctionType(CanQualType Param,
- CanQualType Arg) {
- const FunctionType *ParamFunction = Param->getAs<FunctionType>(),
- *ArgFunction = Arg->getAs<FunctionType>();
+/// \param A the argument type.
+bool Sema::isSameOrCompatibleFunctionType(QualType P, QualType A) {
+ const FunctionType *PF = P->getAs<FunctionType>(),
+ *AF = A->getAs<FunctionType>();
// Just compare if not functions.
- if (!ParamFunction || !ArgFunction)
- return Param == Arg;
+ if (!PF || !AF)
+ return Context.hasSameType(P, A);
// Noreturn and noexcept adjustment.
QualType AdjustedParam;
- if (IsFunctionConversion(Param, Arg, AdjustedParam))
- return Arg == Context.getCanonicalType(AdjustedParam);
+ if (IsFunctionConversion(P, A, AdjustedParam))
+ return Context.hasSameType(AdjustedParam, A);
// FIXME: Compatible calling conventions.
- return Param == Arg;
+ return Context.hasSameType(P, A);
}
/// Get the index of the first template parameter that was originally from the
return false;
}
+static CXXRecordDecl *getCanonicalRD(QualType T) {
+ return cast<CXXRecordDecl>(
+ T->castAs<RecordType>()->getDecl()->getCanonicalDecl());
+}
+
/// Attempt to deduce the template arguments by checking the base types
/// according to (C++20 [temp.deduct.call] p4b3.
///
/// \returns the result of template argument deduction with the bases. "invalid"
/// means no matches, "success" found a single item, and the
/// "MiscellaneousDeductionFailure" result happens when the match is ambiguous.
-static Sema::TemplateDeductionResult DeduceTemplateBases(
- Sema &S, const RecordType *RecordT, TemplateParameterList *TemplateParams,
- const TemplateSpecializationType *SpecParam, TemplateDeductionInfo &Info,
- SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
+static Sema::TemplateDeductionResult
+DeduceTemplateBases(Sema &S, const CXXRecordDecl *RD,
+ TemplateParameterList *TemplateParams, QualType P,
+ TemplateDeductionInfo &Info,
+ SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
// C++14 [temp.deduct.call] p4b3:
// If P is a class and P has the form simple-template-id, then the
// transformed A can be a derived class of the deduced A. Likewise if
// visited, while ToVisit is our stack of records that we still need to
// visit. Matches contains a list of matches that have yet to be
// disqualified.
- llvm::SmallPtrSet<const RecordType *, 8> Visited;
- SmallVector<const RecordType *, 8> ToVisit;
+ llvm::SmallPtrSet<const CXXRecordDecl *, 8> Visited;
+ SmallVector<QualType, 8> ToVisit;
// We iterate over this later, so we have to use MapVector to ensure
// determinism.
- llvm::MapVector<const RecordType *, SmallVector<DeducedTemplateArgument, 8>>
+ llvm::MapVector<const CXXRecordDecl *,
+ SmallVector<DeducedTemplateArgument, 8>>
Matches;
- auto AddBases = [&Visited, &ToVisit](const RecordType *RT) {
- CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
+ auto AddBases = [&Visited, &ToVisit](const CXXRecordDecl *RD) {
for (const auto &Base : RD->bases()) {
- assert(Base.getType()->isRecordType() &&
- "Base class that isn't a record?");
- const RecordType *RT = Base.getType()->getAs<RecordType>();
- if (Visited.insert(RT).second)
- ToVisit.push_back(Base.getType()->getAs<RecordType>());
+ QualType T = Base.getType();
+ assert(T->isRecordType() && "Base class that isn't a record?");
+ if (Visited.insert(::getCanonicalRD(T)).second)
+ ToVisit.push_back(T);
}
};
// Set up the loop by adding all the bases.
- AddBases(RecordT);
+ AddBases(RD);
// Search each path of bases until we either run into a successful match
// (where all bases of it are invalid), or we run out of bases.
while (!ToVisit.empty()) {
- const RecordType *NextT = ToVisit.pop_back_val();
+ QualType NextT = ToVisit.pop_back_val();
SmallVector<DeducedTemplateArgument, 8> DeducedCopy(Deduced.begin(),
Deduced.end());
TemplateDeductionInfo BaseInfo(TemplateDeductionInfo::ForBase, Info);
- Sema::TemplateDeductionResult BaseResult =
- DeduceTemplateArguments(S, TemplateParams, SpecParam,
- QualType(NextT, 0), BaseInfo, DeducedCopy);
+ Sema::TemplateDeductionResult BaseResult = DeduceTemplateSpecArguments(
+ S, TemplateParams, P, NextT, BaseInfo, DeducedCopy);
// If this was a successful deduction, add it to the list of matches,
// otherwise we need to continue searching its bases.
+ const CXXRecordDecl *RD = ::getCanonicalRD(NextT);
if (BaseResult == Sema::TDK_Success)
- Matches.insert({NextT, DeducedCopy});
+ Matches.insert({RD, DeducedCopy});
else
- AddBases(NextT);
+ AddBases(RD);
}
// At this point, 'Matches' contains a list of seemingly valid bases, however
// We can give up once we have a single item (or have run out of things to
// search) since cyclical inheritance isn't valid.
while (Matches.size() > 1 && !ToVisit.empty()) {
- const RecordType *NextT = ToVisit.pop_back_val();
- Matches.erase(NextT);
+ const CXXRecordDecl *RD = ::getCanonicalRD(ToVisit.pop_back_val());
+ Matches.erase(RD);
// Always add all bases, since the inheritance tree can contain
// disqualifications for multiple matches.
- AddBases(NextT);
+ AddBases(RD);
}
}
/// \returns the result of template argument deduction so far. Note that a
/// "success" result means that template argument deduction has not yet failed,
/// but it may still fail, later, for other reasons.
-static Sema::TemplateDeductionResult
-DeduceTemplateArgumentsByTypeMatch(Sema &S,
- TemplateParameterList *TemplateParams,
- QualType ParamIn, QualType ArgIn,
- TemplateDeductionInfo &Info,
- SmallVectorImpl<DeducedTemplateArgument> &Deduced,
- unsigned TDF,
- bool PartialOrdering,
- bool DeducedFromArrayBound) {
- // We only want to look at the canonical types, since typedefs and
- // sugar are not part of template argument deduction.
- QualType Param = S.Context.getCanonicalType(ParamIn);
- QualType Arg = S.Context.getCanonicalType(ArgIn);
-
- // If the argument type is a pack expansion, look at its pattern.
- // This isn't explicitly called out
- if (const PackExpansionType *ArgExpansion
- = dyn_cast<PackExpansionType>(Arg))
- Arg = ArgExpansion->getPattern();
-
+static Sema::TemplateDeductionResult DeduceTemplateArgumentsByTypeMatch(
+ Sema &S, TemplateParameterList *TemplateParams, QualType P, QualType A,
+ TemplateDeductionInfo &Info,
+ SmallVectorImpl<DeducedTemplateArgument> &Deduced, unsigned TDF,
+ bool PartialOrdering, bool DeducedFromArrayBound) {
if (PartialOrdering) {
// C++11 [temp.deduct.partial]p5:
// Before the partial ordering is done, certain transformations are
// performed on the types used for partial ordering:
// - If P is a reference type, P is replaced by the type referred to.
- const ReferenceType *ParamRef = Param->getAs<ReferenceType>();
- if (ParamRef)
- Param = ParamRef->getPointeeType();
+ const ReferenceType *PRef = P->getAs<ReferenceType>();
+ if (PRef)
+ P = PRef->getPointeeType();
// - If A is a reference type, A is replaced by the type referred to.
- const ReferenceType *ArgRef = Arg->getAs<ReferenceType>();
- if (ArgRef)
- Arg = ArgRef->getPointeeType();
+ const ReferenceType *ARef = A->getAs<ReferenceType>();
+ if (ARef)
+ A = A->getPointeeType();
- if (ParamRef && ArgRef && S.Context.hasSameUnqualifiedType(Param, Arg)) {
+ if (PRef && ARef && S.Context.hasSameUnqualifiedType(P, A)) {
// C++11 [temp.deduct.partial]p9:
// If, for a given type, deduction succeeds in both directions (i.e.,
// the types are identical after the transformations above) and both
// succeeds, so we model this as a deduction failure. Note that
// [the first type] is P and [the other type] is A here; the standard
// gets this backwards.
- Qualifiers ParamQuals = Param.getQualifiers();
- Qualifiers ArgQuals = Arg.getQualifiers();
- if ((ParamRef->isLValueReferenceType() &&
- !ArgRef->isLValueReferenceType()) ||
- ParamQuals.isStrictSupersetOf(ArgQuals) ||
- (ParamQuals.hasNonTrivialObjCLifetime() &&
- ArgQuals.getObjCLifetime() == Qualifiers::OCL_ExplicitNone &&
- ParamQuals.withoutObjCLifetime() ==
- ArgQuals.withoutObjCLifetime())) {
- Info.FirstArg = TemplateArgument(ParamIn);
- Info.SecondArg = TemplateArgument(ArgIn);
+ Qualifiers PQuals = P.getQualifiers(), AQuals = A.getQualifiers();
+ if ((PRef->isLValueReferenceType() && !ARef->isLValueReferenceType()) ||
+ PQuals.isStrictSupersetOf(AQuals) ||
+ (PQuals.hasNonTrivialObjCLifetime() &&
+ AQuals.getObjCLifetime() == Qualifiers::OCL_ExplicitNone &&
+ PQuals.withoutObjCLifetime() == AQuals.withoutObjCLifetime())) {
+ Info.FirstArg = TemplateArgument(P);
+ Info.SecondArg = TemplateArgument(A);
return Sema::TDK_NonDeducedMismatch;
}
}
-
+ Qualifiers DiscardedQuals;
// C++11 [temp.deduct.partial]p7:
// Remove any top-level cv-qualifiers:
// - If P is a cv-qualified type, P is replaced by the cv-unqualified
// version of P.
- Param = Param.getUnqualifiedType();
+ P = S.Context.getUnqualifiedArrayType(P, DiscardedQuals);
// - If A is a cv-qualified type, A is replaced by the cv-unqualified
// version of A.
- Arg = Arg.getUnqualifiedType();
+ A = S.Context.getUnqualifiedArrayType(A, DiscardedQuals);
} else {
// C++0x [temp.deduct.call]p4 bullet 1:
// - If the original P is a reference type, the deduced A (i.e., the type
// transformed A.
if (TDF & TDF_ParamWithReferenceType) {
Qualifiers Quals;
- QualType UnqualParam = S.Context.getUnqualifiedArrayType(Param, Quals);
- Quals.setCVRQualifiers(Quals.getCVRQualifiers() &
- Arg.getCVRQualifiers());
- Param = S.Context.getQualifiedType(UnqualParam, Quals);
+ QualType UnqualP = S.Context.getUnqualifiedArrayType(P, Quals);
+ Quals.setCVRQualifiers(Quals.getCVRQualifiers() & A.getCVRQualifiers());
+ P = S.Context.getQualifiedType(UnqualP, Quals);
}
- if ((TDF & TDF_TopLevelParameterTypeList) && !Param->isFunctionType()) {
+ if ((TDF & TDF_TopLevelParameterTypeList) && !P->isFunctionType()) {
// C++0x [temp.deduct.type]p10:
// If P and A are function types that originated from deduction when
// taking the address of a function template (14.8.2.2) or when deducing
// Pi is T&& and Ai is X&, the adjusted Pi will be T, causing T to be
// deduced as X&. - end note ]
TDF &= ~TDF_TopLevelParameterTypeList;
- if (isForwardingReference(Param, 0) && Arg->isLValueReferenceType())
- Param = Param->getPointeeType();
+ if (isForwardingReference(P, /*FirstInnerIndex=*/0) &&
+ A->isLValueReferenceType())
+ P = P->getPointeeType();
}
}
//
// T
// cv-list T
- if (const TemplateTypeParmType *TemplateTypeParm
- = Param->getAs<TemplateTypeParmType>()) {
+ if (const auto *TTP = P->getAs<TemplateTypeParmType>()) {
// Just skip any attempts to deduce from a placeholder type or a parameter
// at a different depth.
- if (Arg->isPlaceholderType() ||
- Info.getDeducedDepth() != TemplateTypeParm->getDepth())
+ if (A->isPlaceholderType() || Info.getDeducedDepth() != TTP->getDepth())
return Sema::TDK_Success;
- unsigned Index = TemplateTypeParm->getIndex();
- bool RecanonicalizeArg = false;
+ unsigned Index = TTP->getIndex();
// If the argument type is an array type, move the qualifiers up to the
// top level, so they can be matched with the qualifiers on the parameter.
- if (isa<ArrayType>(Arg)) {
+ if (A->isArrayType()) {
Qualifiers Quals;
- Arg = S.Context.getUnqualifiedArrayType(Arg, Quals);
- if (Quals) {
- Arg = S.Context.getQualifiedType(Arg, Quals);
- RecanonicalizeArg = true;
- }
+ A = S.Context.getUnqualifiedArrayType(A, Quals);
+ if (Quals)
+ A = S.Context.getQualifiedType(A, Quals);
}
// The argument type can not be less qualified than the parameter
// type.
if (!(TDF & TDF_IgnoreQualifiers) &&
- hasInconsistentOrSupersetQualifiersOf(Param, Arg)) {
+ hasInconsistentOrSupersetQualifiersOf(P, A)) {
Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index));
- Info.FirstArg = TemplateArgument(Param);
- Info.SecondArg = TemplateArgument(Arg);
+ Info.FirstArg = TemplateArgument(P);
+ Info.SecondArg = TemplateArgument(A);
return Sema::TDK_Underqualified;
}
// Do not match a function type with a cv-qualified type.
// http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1584
- if (Arg->isFunctionType() && Param.hasQualifiers()) {
+ if (A->isFunctionType() && P.hasQualifiers())
return Sema::TDK_NonDeducedMismatch;
- }
- assert(TemplateTypeParm->getDepth() == Info.getDeducedDepth() &&
+ assert(TTP->getDepth() == Info.getDeducedDepth() &&
"saw template type parameter with wrong depth");
- assert(Arg != S.Context.OverloadTy && "Unresolved overloaded function");
- QualType DeducedType = Arg;
+ assert(A->getCanonicalTypeInternal() != S.Context.OverloadTy &&
+ "Unresolved overloaded function");
+ QualType DeducedType = A;
// Remove any qualifiers on the parameter from the deduced type.
// We checked the qualifiers for consistency above.
Qualifiers DeducedQs = DeducedType.getQualifiers();
- Qualifiers ParamQs = Param.getQualifiers();
+ Qualifiers ParamQs = P.getQualifiers();
DeducedQs.removeCVRQualifiers(ParamQs.getCVRQualifiers());
if (ParamQs.hasObjCGCAttr())
DeducedQs.removeObjCGCAttr();
if (ParamQs.hasObjCLifetime() && !DeducedType->isObjCLifetimeType() &&
!DeducedType->isDependentType()) {
Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index));
- Info.FirstArg = TemplateArgument(Param);
- Info.SecondArg = TemplateArgument(Arg);
+ Info.FirstArg = TemplateArgument(P);
+ Info.SecondArg = TemplateArgument(A);
return Sema::TDK_Underqualified;
}
// Objective-C ARC:
// If template deduction would produce an argument type with lifetime type
// but no lifetime qualifier, the __strong lifetime qualifier is inferred.
- if (S.getLangOpts().ObjCAutoRefCount &&
- DeducedType->isObjCLifetimeType() &&
+ if (S.getLangOpts().ObjCAutoRefCount && DeducedType->isObjCLifetimeType() &&
!DeducedQs.hasObjCLifetime())
DeducedQs.setObjCLifetime(Qualifiers::OCL_Strong);
- DeducedType = S.Context.getQualifiedType(DeducedType.getUnqualifiedType(),
- DeducedQs);
-
- if (RecanonicalizeArg)
- DeducedType = S.Context.getCanonicalType(DeducedType);
+ DeducedType =
+ S.Context.getQualifiedType(DeducedType.getUnqualifiedType(), DeducedQs);
DeducedTemplateArgument NewDeduced(DeducedType, DeducedFromArrayBound);
- DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context,
- Deduced[Index],
- NewDeduced);
+ DeducedTemplateArgument Result =
+ checkDeducedTemplateArguments(S.Context, Deduced[Index], NewDeduced);
if (Result.isNull()) {
Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index));
Info.FirstArg = Deduced[Index];
}
// Set up the template argument deduction information for a failure.
- Info.FirstArg = TemplateArgument(ParamIn);
- Info.SecondArg = TemplateArgument(ArgIn);
+ Info.FirstArg = TemplateArgument(P);
+ Info.SecondArg = TemplateArgument(A);
// If the parameter is an already-substituted template parameter
// pack, do nothing: we don't know which of its arguments to look
// at, so we have to wait until all of the parameter packs in this
// expansion have arguments.
- if (isa<SubstTemplateTypeParmPackType>(Param))
+ if (P->getAs<SubstTemplateTypeParmPackType>())
return Sema::TDK_Success;
// Check the cv-qualifiers on the parameter and argument types.
- CanQualType CanParam = S.Context.getCanonicalType(Param);
- CanQualType CanArg = S.Context.getCanonicalType(Arg);
if (!(TDF & TDF_IgnoreQualifiers)) {
if (TDF & TDF_ParamWithReferenceType) {
- if (hasInconsistentOrSupersetQualifiersOf(Param, Arg))
+ if (hasInconsistentOrSupersetQualifiersOf(P, A))
return Sema::TDK_NonDeducedMismatch;
} else if (TDF & TDF_ArgWithReferenceType) {
// C++ [temp.deduct.conv]p4:
// If the original A is a reference type, A can be more cv-qualified
// than the deduced A
- if (!Arg.getQualifiers().compatiblyIncludes(Param.getQualifiers()))
+ if (!A.getQualifiers().compatiblyIncludes(P.getQualifiers()))
return Sema::TDK_NonDeducedMismatch;
// Strip out all extra qualifiers from the argument to figure out the
// type we're converting to, prior to the qualification conversion.
Qualifiers Quals;
- Arg = S.Context.getUnqualifiedArrayType(Arg, Quals);
- Arg = S.Context.getQualifiedType(Arg, Param.getQualifiers());
- } else if (!IsPossiblyOpaquelyQualifiedType(Param)) {
- if (Param.getCVRQualifiers() != Arg.getCVRQualifiers())
+ A = S.Context.getUnqualifiedArrayType(A, Quals);
+ A = S.Context.getQualifiedType(A, P.getQualifiers());
+ } else if (!IsPossiblyOpaquelyQualifiedType(P)) {
+ if (P.getCVRQualifiers() != A.getCVRQualifiers())
return Sema::TDK_NonDeducedMismatch;
}
+ }
- // If the parameter type is not dependent, there is nothing to deduce.
- if (!Param->isDependentType()) {
- if (!(TDF & TDF_SkipNonDependent)) {
- bool NonDeduced =
- (TDF & TDF_AllowCompatibleFunctionType)
- ? !S.isSameOrCompatibleFunctionType(CanParam, CanArg)
- : Param != Arg;
- if (NonDeduced) {
- return Sema::TDK_NonDeducedMismatch;
- }
- }
+ // If the parameter type is not dependent, there is nothing to deduce.
+ if (!P->isDependentType()) {
+ if (TDF & TDF_SkipNonDependent)
return Sema::TDK_Success;
- }
- } else if (!Param->isDependentType()) {
- if (!(TDF & TDF_SkipNonDependent)) {
- CanQualType ParamUnqualType = CanParam.getUnqualifiedType(),
- ArgUnqualType = CanArg.getUnqualifiedType();
- bool Success =
- (TDF & TDF_AllowCompatibleFunctionType)
- ? S.isSameOrCompatibleFunctionType(ParamUnqualType, ArgUnqualType)
- : ParamUnqualType == ArgUnqualType;
- if (Success)
- return Sema::TDK_Success;
- } else {
+ if ((TDF & TDF_IgnoreQualifiers) ? S.Context.hasSameUnqualifiedType(P, A)
+ : S.Context.hasSameType(P, A))
return Sema::TDK_Success;
- }
+ if (TDF & TDF_AllowCompatibleFunctionType &&
+ S.isSameOrCompatibleFunctionType(P, A))
+ return Sema::TDK_Success;
+ if (!(TDF & TDF_IgnoreQualifiers))
+ return Sema::TDK_NonDeducedMismatch;
+ // Otherwise, when ignoring qualifiers, the types not having the same
+ // unqualified type does not mean they do not match, so in this case we
+ // must keep going and analyze with a non-dependent parameter type.
}
- switch (Param->getTypeClass()) {
+ switch (P.getCanonicalType()->getTypeClass()) {
// Non-canonical types cannot appear here.
#define NON_CANONICAL_TYPE(Class, Base) \
case Type::Class: llvm_unreachable("deducing non-canonical type: " #Class);
case Type::SubstTemplateTypeParmPack:
llvm_unreachable("Type nodes handled above");
- // These types cannot be dependent, so simply check whether the types are
- // the same.
+ case Type::Auto:
+ // FIXME: Implement deduction in dependent case.
+ if (P->isDependentType())
+ return Sema::TDK_Success;
+ LLVM_FALLTHROUGH;
case Type::Builtin:
case Type::VariableArray:
case Type::Vector:
case Type::ObjCInterface:
case Type::ObjCObjectPointer:
case Type::ExtInt:
- if (TDF & TDF_SkipNonDependent)
- return Sema::TDK_Success;
-
- if (TDF & TDF_IgnoreQualifiers) {
- Param = Param.getUnqualifiedType();
- Arg = Arg.getUnqualifiedType();
- }
-
- return Param == Arg? Sema::TDK_Success : Sema::TDK_NonDeducedMismatch;
+ return (TDF & TDF_SkipNonDependent) ||
+ ((TDF & TDF_IgnoreQualifiers)
+ ? S.Context.hasSameUnqualifiedType(P, A)
+ : S.Context.hasSameType(P, A))
+ ? Sema::TDK_Success
+ : Sema::TDK_NonDeducedMismatch;
// _Complex T [placeholder extension]
- case Type::Complex:
- if (const ComplexType *ComplexArg = Arg->getAs<ComplexType>())
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- cast<ComplexType>(Param)->getElementType(),
- ComplexArg->getElementType(),
- Info, Deduced, TDF);
-
- return Sema::TDK_NonDeducedMismatch;
+ case Type::Complex: {
+ const auto *CP = P->castAs<ComplexType>(), *CA = A->getAs<ComplexType>();
+ if (!CA)
+ return Sema::TDK_NonDeducedMismatch;
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, CP->getElementType(), CA->getElementType(), Info,
+ Deduced, TDF);
+ }
// _Atomic T [extension]
- case Type::Atomic:
- if (const AtomicType *AtomicArg = Arg->getAs<AtomicType>())
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- cast<AtomicType>(Param)->getValueType(),
- AtomicArg->getValueType(),
- Info, Deduced, TDF);
-
- return Sema::TDK_NonDeducedMismatch;
+ case Type::Atomic: {
+ const auto *PA = P->castAs<AtomicType>(), *AA = A->getAs<AtomicType>();
+ if (!AA)
+ return Sema::TDK_NonDeducedMismatch;
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, PA->getValueType(), AA->getValueType(), Info,
+ Deduced, TDF);
+ }
// T *
case Type::Pointer: {
QualType PointeeType;
- if (const PointerType *PointerArg = Arg->getAs<PointerType>()) {
- PointeeType = PointerArg->getPointeeType();
- } else if (const ObjCObjectPointerType *PointerArg
- = Arg->getAs<ObjCObjectPointerType>()) {
- PointeeType = PointerArg->getPointeeType();
+ if (const auto *PA = A->getAs<PointerType>()) {
+ PointeeType = PA->getPointeeType();
+ } else if (const auto *PA = A->getAs<ObjCObjectPointerType>()) {
+ PointeeType = PA->getPointeeType();
} else {
return Sema::TDK_NonDeducedMismatch;
}
-
- unsigned SubTDF = TDF & (TDF_IgnoreQualifiers | TDF_DerivedClass);
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- cast<PointerType>(Param)->getPointeeType(),
- PointeeType,
- Info, Deduced, SubTDF);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, P->castAs<PointerType>()->getPointeeType(),
+ PointeeType, Info, Deduced,
+ TDF & (TDF_IgnoreQualifiers | TDF_DerivedClass));
}
// T &
case Type::LValueReference: {
- const LValueReferenceType *ReferenceArg =
- Arg->getAs<LValueReferenceType>();
- if (!ReferenceArg)
+ const auto *RP = P->castAs<LValueReferenceType>(),
+ *RA = A->getAs<LValueReferenceType>();
+ if (!RA)
return Sema::TDK_NonDeducedMismatch;
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- cast<LValueReferenceType>(Param)->getPointeeType(),
- ReferenceArg->getPointeeType(), Info, Deduced, 0);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, RP->getPointeeType(), RA->getPointeeType(), Info,
+ Deduced, 0);
}
// T && [C++0x]
case Type::RValueReference: {
- const RValueReferenceType *ReferenceArg =
- Arg->getAs<RValueReferenceType>();
- if (!ReferenceArg)
+ const auto *RP = P->castAs<RValueReferenceType>(),
+ *RA = A->getAs<RValueReferenceType>();
+ if (!RA)
return Sema::TDK_NonDeducedMismatch;
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- cast<RValueReferenceType>(Param)->getPointeeType(),
- ReferenceArg->getPointeeType(),
- Info, Deduced, 0);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, RP->getPointeeType(), RA->getPointeeType(), Info,
+ Deduced, 0);
}
// T [] (implied, but not stated explicitly)
case Type::IncompleteArray: {
- const IncompleteArrayType *IncompleteArrayArg =
- S.Context.getAsIncompleteArrayType(Arg);
- if (!IncompleteArrayArg)
+ const auto *IAA = S.Context.getAsIncompleteArrayType(A);
+ if (!IAA)
return Sema::TDK_NonDeducedMismatch;
- unsigned SubTDF = TDF & TDF_IgnoreQualifiers;
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- S.Context.getAsIncompleteArrayType(Param)->getElementType(),
- IncompleteArrayArg->getElementType(),
- Info, Deduced, SubTDF);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams,
+ S.Context.getAsIncompleteArrayType(P)->getElementType(),
+ IAA->getElementType(), Info, Deduced, TDF & TDF_IgnoreQualifiers);
}
// T [integer-constant]
case Type::ConstantArray: {
- const ConstantArrayType *ConstantArrayArg =
- S.Context.getAsConstantArrayType(Arg);
- if (!ConstantArrayArg)
+ const auto *CAA = S.Context.getAsConstantArrayType(A),
+ *CAP = S.Context.getAsConstantArrayType(P);
+ assert(CAP);
+ if (!CAA || CAA->getSize() != CAP->getSize())
return Sema::TDK_NonDeducedMismatch;
- const ConstantArrayType *ConstantArrayParm =
- S.Context.getAsConstantArrayType(Param);
- if (ConstantArrayArg->getSize() != ConstantArrayParm->getSize())
- return Sema::TDK_NonDeducedMismatch;
-
- unsigned SubTDF = TDF & TDF_IgnoreQualifiers;
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- ConstantArrayParm->getElementType(),
- ConstantArrayArg->getElementType(),
- Info, Deduced, SubTDF);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, CAP->getElementType(), CAA->getElementType(), Info,
+ Deduced, TDF & TDF_IgnoreQualifiers);
}
// type [i]
case Type::DependentSizedArray: {
- const ArrayType *ArrayArg = S.Context.getAsArrayType(Arg);
- if (!ArrayArg)
+ const auto *AA = S.Context.getAsArrayType(A);
+ if (!AA)
return Sema::TDK_NonDeducedMismatch;
- unsigned SubTDF = TDF & TDF_IgnoreQualifiers;
-
// Check the element type of the arrays
- const DependentSizedArrayType *DependentArrayParm
- = S.Context.getAsDependentSizedArrayType(Param);
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- DependentArrayParm->getElementType(),
- ArrayArg->getElementType(),
- Info, Deduced, SubTDF))
+ const auto *DAP = S.Context.getAsDependentSizedArrayType(P);
+ assert(DAP);
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, DAP->getElementType(), AA->getElementType(),
+ Info, Deduced, TDF & TDF_IgnoreQualifiers))
return Result;
// Determine the array bound is something we can deduce.
- const NonTypeTemplateParmDecl *NTTP
- = getDeducedParameterFromExpr(Info, DependentArrayParm->getSizeExpr());
+ const NonTypeTemplateParmDecl *NTTP =
+ getDeducedParameterFromExpr(Info, DAP->getSizeExpr());
if (!NTTP)
return Sema::TDK_Success;
// template parameter.
assert(NTTP->getDepth() == Info.getDeducedDepth() &&
"saw non-type template parameter with wrong depth");
- if (const ConstantArrayType *ConstantArrayArg
- = dyn_cast<ConstantArrayType>(ArrayArg)) {
- llvm::APSInt Size(ConstantArrayArg->getSize());
- return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, Size,
- S.Context.getSizeType(),
- /*ArrayBound=*/true,
- Info, Deduced);
+ if (const auto *CAA = dyn_cast<ConstantArrayType>(AA)) {
+ llvm::APSInt Size(CAA->getSize());
+ return DeduceNonTypeTemplateArgument(
+ S, TemplateParams, NTTP, Size, S.Context.getSizeType(),
+ /*ArrayBound=*/true, Info, Deduced);
}
- if (const DependentSizedArrayType *DependentArrayArg
- = dyn_cast<DependentSizedArrayType>(ArrayArg))
- if (DependentArrayArg->getSizeExpr())
- return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- DependentArrayArg->getSizeExpr(),
- Info, Deduced);
+ if (const auto *DAA = dyn_cast<DependentSizedArrayType>(AA))
+ if (DAA->getSizeExpr())
+ return DeduceNonTypeTemplateArgument(
+ S, TemplateParams, NTTP, DAA->getSizeExpr(), Info, Deduced);
// Incomplete type does not match a dependently-sized array type
return Sema::TDK_NonDeducedMismatch;
// T(*)()
// T(*)(T)
case Type::FunctionProto: {
- unsigned SubTDF = TDF & TDF_TopLevelParameterTypeList;
- const FunctionProtoType *FunctionProtoArg =
- dyn_cast<FunctionProtoType>(Arg);
- if (!FunctionProtoArg)
+ const auto *FPP = P->castAs<FunctionProtoType>(),
+ *FPA = A->getAs<FunctionProtoType>();
+ if (!FPA)
return Sema::TDK_NonDeducedMismatch;
- const FunctionProtoType *FunctionProtoParam =
- cast<FunctionProtoType>(Param);
-
- if (FunctionProtoParam->getMethodQuals()
- != FunctionProtoArg->getMethodQuals() ||
- FunctionProtoParam->getRefQualifier()
- != FunctionProtoArg->getRefQualifier() ||
- FunctionProtoParam->isVariadic() != FunctionProtoArg->isVariadic())
+ if (FPP->getMethodQuals() != FPA->getMethodQuals() ||
+ FPP->getRefQualifier() != FPA->getRefQualifier() ||
+ FPP->isVariadic() != FPA->isVariadic())
return Sema::TDK_NonDeducedMismatch;
// Check return types.
if (auto Result = DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, FunctionProtoParam->getReturnType(),
- FunctionProtoArg->getReturnType(), Info, Deduced, 0))
+ S, TemplateParams, FPP->getReturnType(), FPA->getReturnType(),
+ Info, Deduced, 0,
+ /*PartialOrdering=*/false,
+ /*DeducedFromArrayBound=*/false))
return Result;
// Check parameter types.
if (auto Result = DeduceTemplateArguments(
- S, TemplateParams, FunctionProtoParam->param_type_begin(),
- FunctionProtoParam->getNumParams(),
- FunctionProtoArg->param_type_begin(),
- FunctionProtoArg->getNumParams(), Info, Deduced, SubTDF))
+ S, TemplateParams, FPP->param_type_begin(), FPP->getNumParams(),
+ FPA->param_type_begin(), FPA->getNumParams(), Info, Deduced,
+ TDF & TDF_TopLevelParameterTypeList))
return Result;
if (TDF & TDF_AllowCompatibleFunctionType)
// FIXME: Per core-2016/10/1019 (no corresponding core issue yet), permit
// deducing through the noexcept-specifier if it's part of the canonical
// type. libstdc++ relies on this.
- Expr *NoexceptExpr = FunctionProtoParam->getNoexceptExpr();
+ Expr *NoexceptExpr = FPP->getNoexceptExpr();
if (const NonTypeTemplateParmDecl *NTTP =
- NoexceptExpr ? getDeducedParameterFromExpr(Info, NoexceptExpr)
- : nullptr) {
+ NoexceptExpr ? getDeducedParameterFromExpr(Info, NoexceptExpr)
+ : nullptr) {
assert(NTTP->getDepth() == Info.getDeducedDepth() &&
"saw non-type template parameter with wrong depth");
llvm::APSInt Noexcept(1);
- switch (FunctionProtoArg->canThrow()) {
+ switch (FPA->canThrow()) {
case CT_Cannot:
Noexcept = 1;
LLVM_FALLTHROUGH;
// FIXME: Should we?
return DeduceNonTypeTemplateArgument(
S, TemplateParams, NTTP, Noexcept, S.Context.BoolTy,
- /*ArrayBound*/true, Info, Deduced);
+ /*DeducedFromArrayBound=*/true, Info, Deduced);
case CT_Dependent:
- if (Expr *ArgNoexceptExpr = FunctionProtoArg->getNoexceptExpr())
+ if (Expr *ArgNoexceptExpr = FPA->getNoexceptExpr())
return DeduceNonTypeTemplateArgument(
S, TemplateParams, NTTP, ArgNoexceptExpr, Info, Deduced);
// Can't deduce anything from throw(T...).
case Type::InjectedClassName:
// Treat a template's injected-class-name as if the template
// specialization type had been used.
- Param = cast<InjectedClassNameType>(Param)
- ->getInjectedSpecializationType();
- assert(isa<TemplateSpecializationType>(Param) &&
- "injected class name is not a template specialization type");
- LLVM_FALLTHROUGH;
// template-name<T> (where template-name refers to a class template)
// template-name<i>
// TT<i>
// TT<>
case Type::TemplateSpecialization: {
- const TemplateSpecializationType *SpecParam =
- cast<TemplateSpecializationType>(Param);
-
// When Arg cannot be a derived class, we can just try to deduce template
// arguments from the template-id.
- const RecordType *RecordT = Arg->getAs<RecordType>();
- if (!(TDF & TDF_DerivedClass) || !RecordT)
- return DeduceTemplateArguments(S, TemplateParams, SpecParam, Arg, Info,
- Deduced);
+ if (!(TDF & TDF_DerivedClass) || !A->isRecordType())
+ return DeduceTemplateSpecArguments(S, TemplateParams, P, A, Info,
+ Deduced);
SmallVector<DeducedTemplateArgument, 8> DeducedOrig(Deduced.begin(),
Deduced.end());
- Sema::TemplateDeductionResult Result = DeduceTemplateArguments(
- S, TemplateParams, SpecParam, Arg, Info, Deduced);
-
+ auto Result =
+ DeduceTemplateSpecArguments(S, TemplateParams, P, A, Info, Deduced);
if (Result == Sema::TDK_Success)
return Result;
// We cannot inspect base classes as part of deduction when the type
// is incomplete, so either instantiate any templates necessary to
// complete the type, or skip over it if it cannot be completed.
- if (!S.isCompleteType(Info.getLocation(), Arg))
+ if (!S.isCompleteType(Info.getLocation(), A))
return Result;
// Reset the incorrectly deduced argument from above.
Deduced = DeducedOrig;
// Check bases according to C++14 [temp.deduct.call] p4b3:
- Sema::TemplateDeductionResult BaseResult = DeduceTemplateBases(
- S, RecordT, TemplateParams, SpecParam, Info, Deduced);
-
- if (BaseResult != Sema::TDK_Invalid)
- return BaseResult;
- return Result;
+ auto BaseResult = DeduceTemplateBases(S, getCanonicalRD(A),
+ TemplateParams, P, Info, Deduced);
+ return BaseResult != Sema::TDK_Invalid ? BaseResult : Result;
}
// T type::*
// T (T::*)()
// T (T::*)(T)
case Type::MemberPointer: {
- const MemberPointerType *MemPtrParam = cast<MemberPointerType>(Param);
- const MemberPointerType *MemPtrArg = dyn_cast<MemberPointerType>(Arg);
- if (!MemPtrArg)
+ const auto *MPP = P->castAs<MemberPointerType>(),
+ *MPA = A->getAs<MemberPointerType>();
+ if (!MPA)
return Sema::TDK_NonDeducedMismatch;
- QualType ParamPointeeType = MemPtrParam->getPointeeType();
- if (ParamPointeeType->isFunctionType())
- S.adjustMemberFunctionCC(ParamPointeeType, /*IsStatic=*/true,
+ QualType PPT = MPP->getPointeeType();
+ if (PPT->isFunctionType())
+ S.adjustMemberFunctionCC(PPT, /*IsStatic=*/true,
/*IsCtorOrDtor=*/false, Info.getLocation());
- QualType ArgPointeeType = MemPtrArg->getPointeeType();
- if (ArgPointeeType->isFunctionType())
- S.adjustMemberFunctionCC(ArgPointeeType, /*IsStatic=*/true,
+ QualType APT = MPA->getPointeeType();
+ if (APT->isFunctionType())
+ S.adjustMemberFunctionCC(APT, /*IsStatic=*/true,
/*IsCtorOrDtor=*/false, Info.getLocation());
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- ParamPointeeType,
- ArgPointeeType,
- Info, Deduced,
- TDF & TDF_IgnoreQualifiers))
+ unsigned SubTDF = TDF & TDF_IgnoreQualifiers;
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, PPT, APT, Info, Deduced, SubTDF))
return Result;
-
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- QualType(MemPtrParam->getClass(), 0),
- QualType(MemPtrArg->getClass(), 0),
- Info, Deduced,
- TDF & TDF_IgnoreQualifiers);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, QualType(MPP->getClass(), 0),
+ QualType(MPA->getClass(), 0), Info, Deduced, SubTDF);
}
// (clang extension)
// T(^)()
// T(^)(T)
case Type::BlockPointer: {
- const BlockPointerType *BlockPtrParam = cast<BlockPointerType>(Param);
- const BlockPointerType *BlockPtrArg = dyn_cast<BlockPointerType>(Arg);
-
- if (!BlockPtrArg)
+ const auto *BPP = P->castAs<BlockPointerType>(),
+ *BPA = A->getAs<BlockPointerType>();
+ if (!BPA)
return Sema::TDK_NonDeducedMismatch;
-
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- BlockPtrParam->getPointeeType(),
- BlockPtrArg->getPointeeType(),
- Info, Deduced, 0);
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, BPP->getPointeeType(), BPA->getPointeeType(), Info,
+ Deduced, 0);
}
// (clang extension)
//
// T __attribute__(((ext_vector_type(<integral constant>))))
case Type::ExtVector: {
- const ExtVectorType *VectorParam = cast<ExtVectorType>(Param);
- if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) {
+ const auto *VP = P->castAs<ExtVectorType>();
+ QualType ElementType;
+ if (const auto *VA = A->getAs<ExtVectorType>()) {
// Make sure that the vectors have the same number of elements.
- if (VectorParam->getNumElements() != VectorArg->getNumElements())
+ if (VP->getNumElements() != VA->getNumElements())
return Sema::TDK_NonDeducedMismatch;
-
- // Perform deduction on the element types.
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- VectorParam->getElementType(),
- VectorArg->getElementType(),
- Info, Deduced, TDF);
- }
-
- if (const DependentSizedExtVectorType *VectorArg
- = dyn_cast<DependentSizedExtVectorType>(Arg)) {
+ ElementType = VA->getElementType();
+ } else if (const auto *VA = A->getAs<DependentSizedExtVectorType>()) {
// We can't check the number of elements, since the argument has a
// dependent number of elements. This can only occur during partial
// ordering.
-
- // Perform deduction on the element types.
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- VectorParam->getElementType(),
- VectorArg->getElementType(),
- Info, Deduced, TDF);
+ ElementType = VA->getElementType();
+ } else {
+ return Sema::TDK_NonDeducedMismatch;
}
-
- return Sema::TDK_NonDeducedMismatch;
+ // Perform deduction on the element types.
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, VP->getElementType(), ElementType, Info, Deduced,
+ TDF);
}
case Type::DependentVector: {
- const auto *VectorParam = cast<DependentVectorType>(Param);
+ const auto *VP = P->castAs<DependentVectorType>();
- if (const auto *VectorArg = dyn_cast<VectorType>(Arg)) {
+ if (const auto *VA = A->getAs<VectorType>()) {
// Perform deduction on the element types.
- if (Sema::TemplateDeductionResult Result =
- DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, VectorParam->getElementType(),
- VectorArg->getElementType(), Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, VP->getElementType(), VA->getElementType(),
+ Info, Deduced, TDF))
return Result;
// Perform deduction on the vector size, if we can.
const NonTypeTemplateParmDecl *NTTP =
- getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr());
+ getDeducedParameterFromExpr(Info, VP->getSizeExpr());
if (!NTTP)
return Sema::TDK_Success;
llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false);
- ArgSize = VectorArg->getNumElements();
+ ArgSize = VA->getNumElements();
// Note that we use the "array bound" rules here; just like in that
// case, we don't have any particular type for the vector size, but
// we can provide one if necessary.
Info, Deduced);
}
- if (const auto *VectorArg = dyn_cast<DependentVectorType>(Arg)) {
+ if (const auto *VA = A->getAs<DependentVectorType>()) {
// Perform deduction on the element types.
- if (Sema::TemplateDeductionResult Result =
- DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, VectorParam->getElementType(),
- VectorArg->getElementType(), Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, VP->getElementType(), VA->getElementType(),
+ Info, Deduced, TDF))
return Result;
// Perform deduction on the vector size, if we can.
- const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr(
- Info, VectorParam->getSizeExpr());
+ const NonTypeTemplateParmDecl *NTTP =
+ getDeducedParameterFromExpr(Info, VP->getSizeExpr());
if (!NTTP)
return Sema::TDK_Success;
- return DeduceNonTypeTemplateArgument(
- S, TemplateParams, NTTP, VectorArg->getSizeExpr(), Info, Deduced);
+ return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
+ VA->getSizeExpr(), Info, Deduced);
}
return Sema::TDK_NonDeducedMismatch;
//
// T __attribute__(((ext_vector_type(N))))
case Type::DependentSizedExtVector: {
- const DependentSizedExtVectorType *VectorParam
- = cast<DependentSizedExtVectorType>(Param);
+ const auto *VP = P->castAs<DependentSizedExtVectorType>();
- if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) {
+ if (const auto *VA = A->getAs<ExtVectorType>()) {
// Perform deduction on the element types.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- VectorParam->getElementType(),
- VectorArg->getElementType(),
- Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, VP->getElementType(), VA->getElementType(),
+ Info, Deduced, TDF))
return Result;
// Perform deduction on the vector size, if we can.
const NonTypeTemplateParmDecl *NTTP =
- getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr());
+ getDeducedParameterFromExpr(Info, VP->getSizeExpr());
if (!NTTP)
return Sema::TDK_Success;
llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false);
- ArgSize = VectorArg->getNumElements();
+ ArgSize = VA->getNumElements();
// Note that we use the "array bound" rules here; just like in that
// case, we don't have any particular type for the vector size, but
// we can provide one if necessary.
Deduced);
}
- if (const DependentSizedExtVectorType *VectorArg
- = dyn_cast<DependentSizedExtVectorType>(Arg)) {
+ if (const auto *VA = A->getAs<DependentSizedExtVectorType>()) {
// Perform deduction on the element types.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- VectorParam->getElementType(),
- VectorArg->getElementType(),
- Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, VP->getElementType(), VA->getElementType(),
+ Info, Deduced, TDF))
return Result;
// Perform deduction on the vector size, if we can.
const NonTypeTemplateParmDecl *NTTP =
- getDeducedParameterFromExpr(Info, VectorParam->getSizeExpr());
+ getDeducedParameterFromExpr(Info, VP->getSizeExpr());
if (!NTTP)
return Sema::TDK_Success;
return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- VectorArg->getSizeExpr(),
- Info, Deduced);
+ VA->getSizeExpr(), Info, Deduced);
}
return Sema::TDK_NonDeducedMismatch;
// T __attribute__((matrix_type(<integral constant>,
// <integral constant>)))
case Type::ConstantMatrix: {
- const ConstantMatrixType *MatrixArg = dyn_cast<ConstantMatrixType>(Arg);
- if (!MatrixArg)
+ const auto *MP = P->castAs<ConstantMatrixType>(),
+ *MA = A->getAs<ConstantMatrixType>();
+ if (!MA)
return Sema::TDK_NonDeducedMismatch;
- const ConstantMatrixType *MatrixParam = cast<ConstantMatrixType>(Param);
// Check that the dimensions are the same
- if (MatrixParam->getNumRows() != MatrixArg->getNumRows() ||
- MatrixParam->getNumColumns() != MatrixArg->getNumColumns()) {
+ if (MP->getNumRows() != MA->getNumRows() ||
+ MP->getNumColumns() != MA->getNumColumns()) {
return Sema::TDK_NonDeducedMismatch;
}
// Perform deduction on element types.
return DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, MatrixParam->getElementType(),
- MatrixArg->getElementType(), Info, Deduced, TDF);
+ S, TemplateParams, MP->getElementType(), MA->getElementType(), Info,
+ Deduced, TDF);
}
case Type::DependentSizedMatrix: {
- const MatrixType *MatrixArg = dyn_cast<MatrixType>(Arg);
- if (!MatrixArg)
+ const auto *MP = P->castAs<DependentSizedMatrixType>();
+ const auto *MA = A->getAs<MatrixType>();
+ if (!MA)
return Sema::TDK_NonDeducedMismatch;
// Check the element type of the matrixes.
- const DependentSizedMatrixType *MatrixParam =
- cast<DependentSizedMatrixType>(Param);
- if (Sema::TemplateDeductionResult Result =
- DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, MatrixParam->getElementType(),
- MatrixArg->getElementType(), Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, MP->getElementType(), MA->getElementType(),
+ Info, Deduced, TDF))
return Result;
// Try to deduce a matrix dimension.
auto DeduceMatrixArg =
[&S, &Info, &Deduced, &TemplateParams](
- Expr *ParamExpr, const MatrixType *Arg,
+ Expr *ParamExpr, const MatrixType *A,
unsigned (ConstantMatrixType::*GetArgDimension)() const,
Expr *(DependentSizedMatrixType::*GetArgDimensionExpr)() const) {
- const auto *ArgConstMatrix = dyn_cast<ConstantMatrixType>(Arg);
- const auto *ArgDepMatrix = dyn_cast<DependentSizedMatrixType>(Arg);
+ const auto *ACM = dyn_cast<ConstantMatrixType>(A);
+ const auto *ADM = dyn_cast<DependentSizedMatrixType>(A);
if (!ParamExpr->isValueDependent()) {
Optional<llvm::APSInt> ParamConst =
ParamExpr->getIntegerConstantExpr(S.Context);
if (!ParamConst)
return Sema::TDK_NonDeducedMismatch;
- if (ArgConstMatrix) {
- if ((ArgConstMatrix->*GetArgDimension)() == *ParamConst)
+ if (ACM) {
+ if ((ACM->*GetArgDimension)() == *ParamConst)
return Sema::TDK_Success;
return Sema::TDK_NonDeducedMismatch;
}
- Expr *ArgExpr = (ArgDepMatrix->*GetArgDimensionExpr)();
+ Expr *ArgExpr = (ADM->*GetArgDimensionExpr)();
if (Optional<llvm::APSInt> ArgConst =
ArgExpr->getIntegerConstantExpr(S.Context))
if (*ArgConst == *ParamConst)
if (!NTTP)
return Sema::TDK_Success;
- if (ArgConstMatrix) {
+ if (ACM) {
llvm::APSInt ArgConst(
S.Context.getTypeSize(S.Context.getSizeType()));
- ArgConst = (ArgConstMatrix->*GetArgDimension)();
+ ArgConst = (ACM->*GetArgDimension)();
return DeduceNonTypeTemplateArgument(
S, TemplateParams, NTTP, ArgConst, S.Context.getSizeType(),
/*ArrayBound=*/true, Info, Deduced);
}
- return DeduceNonTypeTemplateArgument(
- S, TemplateParams, NTTP, (ArgDepMatrix->*GetArgDimensionExpr)(),
- Info, Deduced);
+ return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
+ (ADM->*GetArgDimensionExpr)(),
+ Info, Deduced);
};
- auto Result = DeduceMatrixArg(MatrixParam->getRowExpr(), MatrixArg,
- &ConstantMatrixType::getNumRows,
- &DependentSizedMatrixType::getRowExpr);
- if (Result)
+ if (auto Result = DeduceMatrixArg(MP->getRowExpr(), MA,
+ &ConstantMatrixType::getNumRows,
+ &DependentSizedMatrixType::getRowExpr))
return Result;
- return DeduceMatrixArg(MatrixParam->getColumnExpr(), MatrixArg,
+ return DeduceMatrixArg(MP->getColumnExpr(), MA,
&ConstantMatrixType::getNumColumns,
&DependentSizedMatrixType::getColumnExpr);
}
//
// T __attribute__(((address_space(N))))
case Type::DependentAddressSpace: {
- const DependentAddressSpaceType *AddressSpaceParam =
- cast<DependentAddressSpaceType>(Param);
+ const auto *ASP = P->castAs<DependentAddressSpaceType>();
- if (const DependentAddressSpaceType *AddressSpaceArg =
- dyn_cast<DependentAddressSpaceType>(Arg)) {
+ if (const auto *ASA = A->getAs<DependentAddressSpaceType>()) {
// Perform deduction on the pointer type.
- if (Sema::TemplateDeductionResult Result =
- DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, AddressSpaceParam->getPointeeType(),
- AddressSpaceArg->getPointeeType(), Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, ASP->getPointeeType(), ASA->getPointeeType(),
+ Info, Deduced, TDF))
return Result;
// Perform deduction on the address space, if we can.
- const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr(
- Info, AddressSpaceParam->getAddrSpaceExpr());
+ const NonTypeTemplateParmDecl *NTTP =
+ getDeducedParameterFromExpr(Info, ASP->getAddrSpaceExpr());
if (!NTTP)
return Sema::TDK_Success;
return DeduceNonTypeTemplateArgument(
- S, TemplateParams, NTTP, AddressSpaceArg->getAddrSpaceExpr(), Info,
- Deduced);
+ S, TemplateParams, NTTP, ASA->getAddrSpaceExpr(), Info, Deduced);
}
- if (isTargetAddressSpace(Arg.getAddressSpace())) {
+ if (isTargetAddressSpace(A.getAddressSpace())) {
llvm::APSInt ArgAddressSpace(S.Context.getTypeSize(S.Context.IntTy),
false);
- ArgAddressSpace = toTargetAddressSpace(Arg.getAddressSpace());
+ ArgAddressSpace = toTargetAddressSpace(A.getAddressSpace());
// Perform deduction on the pointer types.
- if (Sema::TemplateDeductionResult Result =
- DeduceTemplateArgumentsByTypeMatch(
- S, TemplateParams, AddressSpaceParam->getPointeeType(),
- S.Context.removeAddrSpaceQualType(Arg), Info, Deduced, TDF))
+ if (auto Result = DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, ASP->getPointeeType(),
+ S.Context.removeAddrSpaceQualType(A), Info, Deduced, TDF))
return Result;
// Perform deduction on the address space, if we can.
- const NonTypeTemplateParmDecl *NTTP = getDeducedParameterFromExpr(
- Info, AddressSpaceParam->getAddrSpaceExpr());
+ const NonTypeTemplateParmDecl *NTTP =
+ getDeducedParameterFromExpr(Info, ASP->getAddrSpaceExpr());
if (!NTTP)
return Sema::TDK_Success;
return Sema::TDK_NonDeducedMismatch;
}
case Type::DependentExtInt: {
- const auto *IntParam = cast<DependentExtIntType>(Param);
+ const auto *IP = P->castAs<DependentExtIntType>();
- if (const auto *IntArg = dyn_cast<ExtIntType>(Arg)){
- if (IntParam->isUnsigned() != IntArg->isUnsigned())
+ if (const auto *IA = A->getAs<ExtIntType>()) {
+ if (IP->isUnsigned() != IA->isUnsigned())
return Sema::TDK_NonDeducedMismatch;
const NonTypeTemplateParmDecl *NTTP =
- getDeducedParameterFromExpr(Info, IntParam->getNumBitsExpr());
+ getDeducedParameterFromExpr(Info, IP->getNumBitsExpr());
if (!NTTP)
return Sema::TDK_Success;
llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false);
- ArgSize = IntArg->getNumBits();
+ ArgSize = IA->getNumBits();
return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP, ArgSize,
S.Context.IntTy, true, Info,
Deduced);
}
- if (const auto *IntArg = dyn_cast<DependentExtIntType>(Arg)) {
- if (IntParam->isUnsigned() != IntArg->isUnsigned())
+ if (const auto *IA = A->getAs<DependentExtIntType>()) {
+ if (IP->isUnsigned() != IA->isUnsigned())
return Sema::TDK_NonDeducedMismatch;
return Sema::TDK_Success;
}
+
return Sema::TDK_NonDeducedMismatch;
}
case Type::UnresolvedUsing:
case Type::Decltype:
case Type::UnaryTransform:
- case Type::Auto:
case Type::DeducedTemplateSpecialization:
case Type::DependentTemplateSpecialization:
case Type::PackExpansion:
case Type::Pipe:
// No template argument deduction for these types
return Sema::TDK_Success;
- }
+ }
llvm_unreachable("Invalid Type Class!");
}
static Sema::TemplateDeductionResult
-DeduceTemplateArguments(Sema &S,
- TemplateParameterList *TemplateParams,
- const TemplateArgument &Param,
- TemplateArgument Arg,
+DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams,
+ const TemplateArgument &P, TemplateArgument A,
TemplateDeductionInfo &Info,
SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
// If the template argument is a pack expansion, perform template argument
// deduction against the pattern of that expansion. This only occurs during
// partial ordering.
- if (Arg.isPackExpansion())
- Arg = Arg.getPackExpansionPattern();
+ if (A.isPackExpansion())
+ A = A.getPackExpansionPattern();
- switch (Param.getKind()) {
+ switch (P.getKind()) {
case TemplateArgument::Null:
llvm_unreachable("Null template argument in parameter list");
case TemplateArgument::Type:
- if (Arg.getKind() == TemplateArgument::Type)
- return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams,
- Param.getAsType(),
- Arg.getAsType(),
- Info, Deduced, 0);
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ if (A.getKind() == TemplateArgument::Type)
+ return DeduceTemplateArgumentsByTypeMatch(
+ S, TemplateParams, P.getAsType(), A.getAsType(), Info, Deduced, 0);
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
case TemplateArgument::Template:
- if (Arg.getKind() == TemplateArgument::Template)
- return DeduceTemplateArguments(S, TemplateParams,
- Param.getAsTemplate(),
- Arg.getAsTemplate(), Info, Deduced);
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ if (A.getKind() == TemplateArgument::Template)
+ return DeduceTemplateArguments(S, TemplateParams, P.getAsTemplate(),
+ A.getAsTemplate(), Info, Deduced);
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
case TemplateArgument::TemplateExpansion:
llvm_unreachable("caller should handle pack expansions");
case TemplateArgument::Declaration:
- if (Arg.getKind() == TemplateArgument::Declaration &&
- isSameDeclaration(Param.getAsDecl(), Arg.getAsDecl()))
+ if (A.getKind() == TemplateArgument::Declaration &&
+ isSameDeclaration(P.getAsDecl(), A.getAsDecl()))
return Sema::TDK_Success;
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
case TemplateArgument::NullPtr:
- if (Arg.getKind() == TemplateArgument::NullPtr &&
- S.Context.hasSameType(Param.getNullPtrType(), Arg.getNullPtrType()))
+ if (A.getKind() == TemplateArgument::NullPtr &&
+ S.Context.hasSameType(P.getNullPtrType(), A.getNullPtrType()))
return Sema::TDK_Success;
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
case TemplateArgument::Integral:
- if (Arg.getKind() == TemplateArgument::Integral) {
- if (hasSameExtendedValue(Param.getAsIntegral(), Arg.getAsIntegral()))
+ if (A.getKind() == TemplateArgument::Integral) {
+ if (hasSameExtendedValue(P.getAsIntegral(), A.getAsIntegral()))
return Sema::TDK_Success;
-
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
- return Sema::TDK_NonDeducedMismatch;
}
-
- if (Arg.getKind() == TemplateArgument::Expression) {
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
- return Sema::TDK_NonDeducedMismatch;
- }
-
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
case TemplateArgument::Expression:
if (const NonTypeTemplateParmDecl *NTTP =
- getDeducedParameterFromExpr(Info, Param.getAsExpr())) {
- if (Arg.getKind() == TemplateArgument::Integral)
- return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- Arg.getAsIntegral(),
- Arg.getIntegralType(),
- /*ArrayBound=*/false,
- Info, Deduced);
- if (Arg.getKind() == TemplateArgument::NullPtr)
+ getDeducedParameterFromExpr(Info, P.getAsExpr())) {
+ if (A.getKind() == TemplateArgument::Integral)
+ return DeduceNonTypeTemplateArgument(
+ S, TemplateParams, NTTP, A.getAsIntegral(), A.getIntegralType(),
+ /*ArrayBound=*/false, Info, Deduced);
+ if (A.getKind() == TemplateArgument::NullPtr)
return DeduceNullPtrTemplateArgument(S, TemplateParams, NTTP,
- Arg.getNullPtrType(),
- Info, Deduced);
- if (Arg.getKind() == TemplateArgument::Expression)
- return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- Arg.getAsExpr(), Info, Deduced);
- if (Arg.getKind() == TemplateArgument::Declaration)
+ A.getNullPtrType(), Info, Deduced);
+ if (A.getKind() == TemplateArgument::Expression)
return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- Arg.getAsDecl(),
- Arg.getParamTypeForDecl(),
- Info, Deduced);
+ A.getAsExpr(), Info, Deduced);
+ if (A.getKind() == TemplateArgument::Declaration)
+ return DeduceNonTypeTemplateArgument(
+ S, TemplateParams, NTTP, A.getAsDecl(), A.getParamTypeForDecl(),
+ Info, Deduced);
- Info.FirstArg = Param;
- Info.SecondArg = Arg;
+ Info.FirstArg = P;
+ Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
}
// Can't deduce anything, but that's okay.
return Sema::TDK_Success;
-
case TemplateArgument::Pack:
llvm_unreachable("Argument packs should be expanded by the caller!");
}
static Sema::TemplateDeductionResult
DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams,
- ArrayRef<TemplateArgument> Params,
- ArrayRef<TemplateArgument> Args,
+ ArrayRef<TemplateArgument> Ps,
+ ArrayRef<TemplateArgument> As,
TemplateDeductionInfo &Info,
SmallVectorImpl<DeducedTemplateArgument> &Deduced,
bool NumberOfArgumentsMustMatch) {
// If the template argument list of P contains a pack expansion that is not
// the last template argument, the entire template argument list is a
// non-deduced context.
- if (hasPackExpansionBeforeEnd(Params))
+ if (hasPackExpansionBeforeEnd(Ps))
return Sema::TDK_Success;
// C++0x [temp.deduct.type]p9:
// respective template argument list P is compared with the corresponding
// argument Ai of the corresponding template argument list of A.
unsigned ArgIdx = 0, ParamIdx = 0;
- for (; hasTemplateArgumentForDeduction(Params, ParamIdx); ++ParamIdx) {
- if (!Params[ParamIdx].isPackExpansion()) {
+ for (; hasTemplateArgumentForDeduction(Ps, ParamIdx); ++ParamIdx) {
+ const TemplateArgument &P = Ps[ParamIdx];
+ if (!P.isPackExpansion()) {
// The simple case: deduce template arguments by matching Pi and Ai.
// Check whether we have enough arguments.
- if (!hasTemplateArgumentForDeduction(Args, ArgIdx))
+ if (!hasTemplateArgumentForDeduction(As, ArgIdx))
return NumberOfArgumentsMustMatch
? Sema::TDK_MiscellaneousDeductionFailure
: Sema::TDK_Success;
// C++1z [temp.deduct.type]p9:
// During partial ordering, if Ai was originally a pack expansion [and]
// Pi is not a pack expansion, template argument deduction fails.
- if (Args[ArgIdx].isPackExpansion())
+ if (As[ArgIdx].isPackExpansion())
return Sema::TDK_MiscellaneousDeductionFailure;
// Perform deduction for this Pi/Ai pair.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArguments(S, TemplateParams,
- Params[ParamIdx], Args[ArgIdx],
- Info, Deduced))
+ if (auto Result = DeduceTemplateArguments(S, TemplateParams, P,
+ As[ArgIdx], Info, Deduced))
return Result;
// Move to the next argument.
// each remaining argument in the template argument list of A. Each
// comparison deduces template arguments for subsequent positions in the
// template parameter packs expanded by Pi.
- TemplateArgument Pattern = Params[ParamIdx].getPackExpansionPattern();
+ TemplateArgument Pattern = P.getPackExpansionPattern();
// Prepare to deduce the packs within the pattern.
PackDeductionScope PackScope(S, TemplateParams, Deduced, Info, Pattern);
// Keep track of the deduced template arguments for each parameter pack
// expanded by this pack expansion (the outer index) and for each
// template argument (the inner SmallVectors).
- for (; hasTemplateArgumentForDeduction(Args, ArgIdx) &&
+ for (; hasTemplateArgumentForDeduction(As, ArgIdx) &&
PackScope.hasNextElement();
++ArgIdx) {
// Deduce template arguments from the pattern.
- if (Sema::TemplateDeductionResult Result
- = DeduceTemplateArguments(S, TemplateParams, Pattern, Args[ArgIdx],
- Info, Deduced))
+ if (auto Result = DeduceTemplateArguments(S, TemplateParams, Pattern,
+ As[ArgIdx], Info, Deduced))
return Result;
PackScope.nextPackElement();
}
static Sema::TemplateDeductionResult
-DeduceTemplateArguments(Sema &S,
- TemplateParameterList *TemplateParams,
+DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams,
const TemplateArgumentList &ParamList,
const TemplateArgumentList &ArgList,
TemplateDeductionInfo &Info,
SmallVectorImpl<DeducedTemplateArgument> &Deduced) {
return DeduceTemplateArguments(S, TemplateParams, ParamList.asArray(),
ArgList.asArray(), Info, Deduced,
- /*NumberOfArgumentsMustMatch*/false);
+ /*NumberOfArgumentsMustMatch=*/false);
}
/// Determine whether two template arguments are the same.
bool HasDeducedReturnType = false;
if (getLangOpts().CPlusPlus14 && IsAddressOfFunction &&
Function->getReturnType()->getContainedAutoType()) {
- FunctionType = SubstAutoType(FunctionType, Context.DependentTy);
+ FunctionType = SubstAutoTypeDependent(FunctionType);
HasDeducedReturnType = true;
}
ExprResult ER = CheckPlaceholderExpr(Init);
if (ER.isInvalid())
return DAR_FailedAlreadyDiagnosed;
- Init = ER.get();
- QualType Deduced = BuildDecltypeType(Init, Init->getBeginLoc(), false);
- if (Deduced.isNull())
- return DAR_FailedAlreadyDiagnosed;
- // FIXME: Support a non-canonical deduced type for 'auto'.
- Deduced = Context.getCanonicalType(Deduced);
+ QualType Deduced = getDecltypeForExpr(ER.get());
+ assert(!Deduced.isNull());
if (AT->isConstrained() && !IgnoreConstraints) {
auto ConstraintsResult =
CheckDeducedPlaceholderConstraints(*this, *AT,
Context, Loc, Loc, TemplParamPtr, Loc, nullptr);
QualType FuncParam =
- SubstituteDeducedTypeTransform(*this, TemplArg, /*UseTypeSugar*/false)
+ SubstituteDeducedTypeTransform(*this, TemplArg, /*UseTypeSugar*/ true)
.Apply(Type);
assert(!FuncParam.isNull() &&
"substituting template parameter for 'auto' failed");
QualType Sema::SubstAutoType(QualType TypeWithAuto,
QualType TypeToReplaceAuto) {
- if (TypeToReplaceAuto->isDependentType())
- return SubstituteDeducedTypeTransform(
- *this, DependentAuto{
- TypeToReplaceAuto->containsUnexpandedParameterPack()})
- .TransformType(TypeWithAuto);
+ assert(TypeToReplaceAuto != Context.DependentTy);
return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto)
.TransformType(TypeWithAuto);
}
TypeSourceInfo *Sema::SubstAutoTypeSourceInfo(TypeSourceInfo *TypeWithAuto,
QualType TypeToReplaceAuto) {
- if (TypeToReplaceAuto->isDependentType())
- return SubstituteDeducedTypeTransform(
- *this,
- DependentAuto{
- TypeToReplaceAuto->containsUnexpandedParameterPack()})
- .TransformType(TypeWithAuto);
+ assert(TypeToReplaceAuto != Context.DependentTy);
return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto)
.TransformType(TypeWithAuto);
}
+QualType Sema::SubstAutoTypeDependent(QualType TypeWithAuto) {
+ return SubstituteDeducedTypeTransform(*this, DependentAuto{false})
+ .TransformType(TypeWithAuto);
+}
+
+TypeSourceInfo *
+Sema::SubstAutoTypeSourceInfoDependent(TypeSourceInfo *TypeWithAuto) {
+ return SubstituteDeducedTypeTransform(*this, DependentAuto{false})
+ .TransformType(TypeWithAuto);
+}
+
QualType Sema::ReplaceAutoType(QualType TypeWithAuto,
QualType TypeToReplaceAuto) {
return SubstituteDeducedTypeTransform(*this, TypeToReplaceAuto,
Args2.resize(NumComparedArguments);
if (Reversed)
std::reverse(Args2.begin(), Args2.end());
+
if (DeduceTemplateArguments(S, TemplateParams, Args2.data(), Args2.size(),
Args1.data(), Args1.size(), Info, Deduced,
TDF_None, /*PartialOrdering=*/true))
projects / platform / upstream / llvm.git / commitdiff