| //===------- SemaTemplateInstantiate.cpp - C++ Template Instantiation ------===/ |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| //===----------------------------------------------------------------------===/ |
| // |
| // This file implements C++ template instantiation. |
| // |
| //===----------------------------------------------------------------------===/ |
| |
| #include "clang/Sema/SemaInternal.h" |
| #include "TreeTransform.h" |
| #include "clang/AST/ASTConsumer.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/ASTLambda.h" |
| #include "clang/AST/ASTMutationListener.h" |
| #include "clang/AST/DeclTemplate.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/AST/PrettyDeclStackTrace.h" |
| #include "clang/Basic/LangOptions.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "clang/Sema/Initialization.h" |
| #include "clang/Sema/Lookup.h" |
| #include "clang/Sema/Template.h" |
| #include "clang/Sema/TemplateDeduction.h" |
| #include "clang/Sema/TemplateInstCallback.h" |
| |
| using namespace clang; |
| using namespace sema; |
| |
| //===----------------------------------------------------------------------===/ |
| // Template Instantiation Support |
| //===----------------------------------------------------------------------===/ |
| |
| /// Retrieve the template argument list(s) that should be used to |
| /// instantiate the definition of the given declaration. |
| /// |
| /// \param D the declaration for which we are computing template instantiation |
| /// arguments. |
| /// |
| /// \param Innermost if non-NULL, the innermost template argument list. |
| /// |
| /// \param RelativeToPrimary true if we should get the template |
| /// arguments relative to the primary template, even when we're |
| /// dealing with a specialization. This is only relevant for function |
| /// template specializations. |
| /// |
| /// \param Pattern If non-NULL, indicates the pattern from which we will be |
| /// instantiating the definition of the given declaration, \p D. This is |
| /// used to determine the proper set of template instantiation arguments for |
| /// friend function template specializations. |
| MultiLevelTemplateArgumentList |
| Sema::getTemplateInstantiationArgs(NamedDecl *D, |
| const TemplateArgumentList *Innermost, |
| bool RelativeToPrimary, |
| const FunctionDecl *Pattern) { |
| // Accumulate the set of template argument lists in this structure. |
| MultiLevelTemplateArgumentList Result; |
| |
| if (Innermost) |
| Result.addOuterTemplateArguments(Innermost); |
| |
| DeclContext *Ctx = dyn_cast<DeclContext>(D); |
| if (!Ctx) { |
| Ctx = D->getDeclContext(); |
| |
| // Add template arguments from a variable template instantiation. |
| if (VarTemplateSpecializationDecl *Spec = |
| dyn_cast<VarTemplateSpecializationDecl>(D)) { |
| // We're done when we hit an explicit specialization. |
| if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization && |
| !isa<VarTemplatePartialSpecializationDecl>(Spec)) |
| return Result; |
| |
| Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs()); |
| |
| // If this variable template specialization was instantiated from a |
| // specialized member that is a variable template, we're done. |
| assert(Spec->getSpecializedTemplate() && "No variable template?"); |
| llvm::PointerUnion<VarTemplateDecl*, |
| VarTemplatePartialSpecializationDecl*> Specialized |
| = Spec->getSpecializedTemplateOrPartial(); |
| if (VarTemplatePartialSpecializationDecl *Partial = |
| Specialized.dyn_cast<VarTemplatePartialSpecializationDecl *>()) { |
| if (Partial->isMemberSpecialization()) |
| return Result; |
| } else { |
| VarTemplateDecl *Tmpl = Specialized.get<VarTemplateDecl *>(); |
| if (Tmpl->isMemberSpecialization()) |
| return Result; |
| } |
| } |
| |
| // If we have a template template parameter with translation unit context, |
| // then we're performing substitution into a default template argument of |
| // this template template parameter before we've constructed the template |
| // that will own this template template parameter. In this case, we |
| // use empty template parameter lists for all of the outer templates |
| // to avoid performing any substitutions. |
| if (Ctx->isTranslationUnit()) { |
| if (TemplateTemplateParmDecl *TTP |
| = dyn_cast<TemplateTemplateParmDecl>(D)) { |
| for (unsigned I = 0, N = TTP->getDepth() + 1; I != N; ++I) |
| Result.addOuterTemplateArguments(None); |
| return Result; |
| } |
| } |
| } |
| |
| while (!Ctx->isFileContext()) { |
| // Add template arguments from a class template instantiation. |
| if (ClassTemplateSpecializationDecl *Spec |
| = dyn_cast<ClassTemplateSpecializationDecl>(Ctx)) { |
| // We're done when we hit an explicit specialization. |
| if (Spec->getSpecializationKind() == TSK_ExplicitSpecialization && |
| !isa<ClassTemplatePartialSpecializationDecl>(Spec)) |
| break; |
| |
| Result.addOuterTemplateArguments(&Spec->getTemplateInstantiationArgs()); |
| |
| // If this class template specialization was instantiated from a |
| // specialized member that is a class template, we're done. |
| assert(Spec->getSpecializedTemplate() && "No class template?"); |
| if (Spec->getSpecializedTemplate()->isMemberSpecialization()) |
| break; |
| } |
| // Add template arguments from a function template specialization. |
| else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Ctx)) { |
| if (!RelativeToPrimary && |
| (Function->getTemplateSpecializationKind() == |
| TSK_ExplicitSpecialization && |
| !Function->getClassScopeSpecializationPattern())) |
| break; |
| |
| if (const TemplateArgumentList *TemplateArgs |
| = Function->getTemplateSpecializationArgs()) { |
| // Add the template arguments for this specialization. |
| Result.addOuterTemplateArguments(TemplateArgs); |
| |
| // If this function was instantiated from a specialized member that is |
| // a function template, we're done. |
| assert(Function->getPrimaryTemplate() && "No function template?"); |
| if (Function->getPrimaryTemplate()->isMemberSpecialization()) |
| break; |
| |
| // If this function is a generic lambda specialization, we are done. |
| if (isGenericLambdaCallOperatorSpecialization(Function)) |
| break; |
| |
| } else if (FunctionTemplateDecl *FunTmpl |
| = Function->getDescribedFunctionTemplate()) { |
| // Add the "injected" template arguments. |
| Result.addOuterTemplateArguments(FunTmpl->getInjectedTemplateArgs()); |
| } |
| |
| // If this is a friend declaration and it declares an entity at |
| // namespace scope, take arguments from its lexical parent |
| // instead of its semantic parent, unless of course the pattern we're |
| // instantiating actually comes from the file's context! |
| if (Function->getFriendObjectKind() && |
| Function->getDeclContext()->isFileContext() && |
| (!Pattern || !Pattern->getLexicalDeclContext()->isFileContext())) { |
| Ctx = Function->getLexicalDeclContext(); |
| RelativeToPrimary = false; |
| continue; |
| } |
| } else if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Ctx)) { |
| if (ClassTemplateDecl *ClassTemplate = Rec->getDescribedClassTemplate()) { |
| QualType T = ClassTemplate->getInjectedClassNameSpecialization(); |
| const TemplateSpecializationType *TST = |
| cast<TemplateSpecializationType>(Context.getCanonicalType(T)); |
| Result.addOuterTemplateArguments( |
| llvm::makeArrayRef(TST->getArgs(), TST->getNumArgs())); |
| if (ClassTemplate->isMemberSpecialization()) |
| break; |
| } |
| } |
| |
| Ctx = Ctx->getParent(); |
| RelativeToPrimary = false; |
| } |
| |
| return Result; |
| } |
| |
| bool Sema::CodeSynthesisContext::isInstantiationRecord() const { |
| switch (Kind) { |
| case TemplateInstantiation: |
| case ExceptionSpecInstantiation: |
| case DefaultTemplateArgumentInstantiation: |
| case DefaultFunctionArgumentInstantiation: |
| case ExplicitTemplateArgumentSubstitution: |
| case DeducedTemplateArgumentSubstitution: |
| case PriorTemplateArgumentSubstitution: |
| return true; |
| |
| case DefaultTemplateArgumentChecking: |
| case DeclaringSpecialMember: |
| case DefiningSynthesizedFunction: |
| return false; |
| |
| // This function should never be called when Kind's value is Memoization. |
| case Memoization: |
| break; |
| } |
| |
| llvm_unreachable("Invalid SynthesisKind!"); |
| } |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, CodeSynthesisContext::SynthesisKind Kind, |
| SourceLocation PointOfInstantiation, SourceRange InstantiationRange, |
| Decl *Entity, NamedDecl *Template, ArrayRef<TemplateArgument> TemplateArgs, |
| sema::TemplateDeductionInfo *DeductionInfo) |
| : SemaRef(SemaRef) { |
| // Don't allow further instantiation if a fatal error and an uncompilable |
| // error have occurred. Any diagnostics we might have raised will not be |
| // visible, and we do not need to construct a correct AST. |
| if (SemaRef.Diags.hasFatalErrorOccurred() && |
| SemaRef.Diags.hasUncompilableErrorOccurred()) { |
| Invalid = true; |
| return; |
| } |
| Invalid = CheckInstantiationDepth(PointOfInstantiation, InstantiationRange); |
| if (!Invalid) { |
| CodeSynthesisContext Inst; |
| Inst.Kind = Kind; |
| Inst.PointOfInstantiation = PointOfInstantiation; |
| Inst.Entity = Entity; |
| Inst.Template = Template; |
| Inst.TemplateArgs = TemplateArgs.data(); |
| Inst.NumTemplateArgs = TemplateArgs.size(); |
| Inst.DeductionInfo = DeductionInfo; |
| Inst.InstantiationRange = InstantiationRange; |
| SemaRef.pushCodeSynthesisContext(Inst); |
| |
| AlreadyInstantiating = |
| !SemaRef.InstantiatingSpecializations |
| .insert(std::make_pair(Inst.Entity->getCanonicalDecl(), Inst.Kind)) |
| .second; |
| atTemplateBegin(SemaRef.TemplateInstCallbacks, SemaRef, Inst); |
| } |
| } |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, Decl *Entity, |
| SourceRange InstantiationRange) |
| : InstantiatingTemplate(SemaRef, |
| CodeSynthesisContext::TemplateInstantiation, |
| PointOfInstantiation, InstantiationRange, Entity) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, FunctionDecl *Entity, |
| ExceptionSpecification, SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, CodeSynthesisContext::ExceptionSpecInstantiation, |
| PointOfInstantiation, InstantiationRange, Entity) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateParameter Param, |
| TemplateDecl *Template, ArrayRef<TemplateArgument> TemplateArgs, |
| SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::DefaultTemplateArgumentInstantiation, |
| PointOfInstantiation, InstantiationRange, getAsNamedDecl(Param), |
| Template, TemplateArgs) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, |
| FunctionTemplateDecl *FunctionTemplate, |
| ArrayRef<TemplateArgument> TemplateArgs, |
| CodeSynthesisContext::SynthesisKind Kind, |
| sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange) |
| : InstantiatingTemplate(SemaRef, Kind, PointOfInstantiation, |
| InstantiationRange, FunctionTemplate, nullptr, |
| TemplateArgs, &DeductionInfo) { |
| assert( |
| Kind == CodeSynthesisContext::ExplicitTemplateArgumentSubstitution || |
| Kind == CodeSynthesisContext::DeducedTemplateArgumentSubstitution); |
| } |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, |
| TemplateDecl *Template, |
| ArrayRef<TemplateArgument> TemplateArgs, |
| sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::DeducedTemplateArgumentSubstitution, |
| PointOfInstantiation, InstantiationRange, Template, nullptr, |
| TemplateArgs, &DeductionInfo) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, |
| ClassTemplatePartialSpecializationDecl *PartialSpec, |
| ArrayRef<TemplateArgument> TemplateArgs, |
| sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::DeducedTemplateArgumentSubstitution, |
| PointOfInstantiation, InstantiationRange, PartialSpec, nullptr, |
| TemplateArgs, &DeductionInfo) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, |
| VarTemplatePartialSpecializationDecl *PartialSpec, |
| ArrayRef<TemplateArgument> TemplateArgs, |
| sema::TemplateDeductionInfo &DeductionInfo, SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::DeducedTemplateArgumentSubstitution, |
| PointOfInstantiation, InstantiationRange, PartialSpec, nullptr, |
| TemplateArgs, &DeductionInfo) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, ParmVarDecl *Param, |
| ArrayRef<TemplateArgument> TemplateArgs, SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::DefaultFunctionArgumentInstantiation, |
| PointOfInstantiation, InstantiationRange, Param, nullptr, |
| TemplateArgs) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template, |
| NonTypeTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs, |
| SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::PriorTemplateArgumentSubstitution, |
| PointOfInstantiation, InstantiationRange, Param, Template, |
| TemplateArgs) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, NamedDecl *Template, |
| TemplateTemplateParmDecl *Param, ArrayRef<TemplateArgument> TemplateArgs, |
| SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, |
| CodeSynthesisContext::PriorTemplateArgumentSubstitution, |
| PointOfInstantiation, InstantiationRange, Param, Template, |
| TemplateArgs) {} |
| |
| Sema::InstantiatingTemplate::InstantiatingTemplate( |
| Sema &SemaRef, SourceLocation PointOfInstantiation, TemplateDecl *Template, |
| NamedDecl *Param, ArrayRef<TemplateArgument> TemplateArgs, |
| SourceRange InstantiationRange) |
| : InstantiatingTemplate( |
| SemaRef, CodeSynthesisContext::DefaultTemplateArgumentChecking, |
| PointOfInstantiation, InstantiationRange, Param, Template, |
| TemplateArgs) {} |
| |
| void Sema::pushCodeSynthesisContext(CodeSynthesisContext Ctx) { |
| Ctx.SavedInNonInstantiationSFINAEContext = InNonInstantiationSFINAEContext; |
| InNonInstantiationSFINAEContext = false; |
| |
| CodeSynthesisContexts.push_back(Ctx); |
| |
| if (!Ctx.isInstantiationRecord()) |
| ++NonInstantiationEntries; |
| } |
| |
| void Sema::popCodeSynthesisContext() { |
| auto &Active = CodeSynthesisContexts.back(); |
| if (!Active.isInstantiationRecord()) { |
| assert(NonInstantiationEntries > 0); |
| --NonInstantiationEntries; |
| } |
| |
| InNonInstantiationSFINAEContext = Active.SavedInNonInstantiationSFINAEContext; |
| |
| // Name lookup no longer looks in this template's defining module. |
| assert(CodeSynthesisContexts.size() >= |
| CodeSynthesisContextLookupModules.size() && |
| "forgot to remove a lookup module for a template instantiation"); |
| if (CodeSynthesisContexts.size() == |
| CodeSynthesisContextLookupModules.size()) { |
| if (Module *M = CodeSynthesisContextLookupModules.back()) |
| LookupModulesCache.erase(M); |
| CodeSynthesisContextLookupModules.pop_back(); |
| } |
| |
| // If we've left the code synthesis context for the current context stack, |
| // stop remembering that we've emitted that stack. |
| if (CodeSynthesisContexts.size() == |
| LastEmittedCodeSynthesisContextDepth) |
| LastEmittedCodeSynthesisContextDepth = 0; |
| |
| CodeSynthesisContexts.pop_back(); |
| } |
| |
| void Sema::InstantiatingTemplate::Clear() { |
| if (!Invalid) { |
| if (!AlreadyInstantiating) { |
| auto &Active = SemaRef.CodeSynthesisContexts.back(); |
| SemaRef.InstantiatingSpecializations.erase( |
| std::make_pair(Active.Entity, Active.Kind)); |
| } |
| |
| atTemplateEnd(SemaRef.TemplateInstCallbacks, SemaRef, |
| SemaRef.CodeSynthesisContexts.back()); |
| |
| SemaRef.popCodeSynthesisContext(); |
| Invalid = true; |
| } |
| } |
| |
| bool Sema::InstantiatingTemplate::CheckInstantiationDepth( |
| SourceLocation PointOfInstantiation, |
| SourceRange InstantiationRange) { |
| assert(SemaRef.NonInstantiationEntries <= |
| SemaRef.CodeSynthesisContexts.size()); |
| if ((SemaRef.CodeSynthesisContexts.size() - |
| SemaRef.NonInstantiationEntries) |
| <= SemaRef.getLangOpts().InstantiationDepth) |
| return false; |
| |
| SemaRef.Diag(PointOfInstantiation, |
| diag::err_template_recursion_depth_exceeded) |
| << SemaRef.getLangOpts().InstantiationDepth |
| << InstantiationRange; |
| SemaRef.Diag(PointOfInstantiation, diag::note_template_recursion_depth) |
| << SemaRef.getLangOpts().InstantiationDepth; |
| return true; |
| } |
| |
| /// Prints the current instantiation stack through a series of |
| /// notes. |
| void Sema::PrintInstantiationStack() { |
| // Determine which template instantiations to skip, if any. |
| unsigned SkipStart = CodeSynthesisContexts.size(), SkipEnd = SkipStart; |
| unsigned Limit = Diags.getTemplateBacktraceLimit(); |
| if (Limit && Limit < CodeSynthesisContexts.size()) { |
| SkipStart = Limit / 2 + Limit % 2; |
| SkipEnd = CodeSynthesisContexts.size() - Limit / 2; |
| } |
| |
| // FIXME: In all of these cases, we need to show the template arguments |
| unsigned InstantiationIdx = 0; |
| for (SmallVectorImpl<CodeSynthesisContext>::reverse_iterator |
| Active = CodeSynthesisContexts.rbegin(), |
| ActiveEnd = CodeSynthesisContexts.rend(); |
| Active != ActiveEnd; |
| ++Active, ++InstantiationIdx) { |
| // Skip this instantiation? |
| if (InstantiationIdx >= SkipStart && InstantiationIdx < SkipEnd) { |
| if (InstantiationIdx == SkipStart) { |
| // Note that we're skipping instantiations. |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_instantiation_contexts_suppressed) |
| << unsigned(CodeSynthesisContexts.size() - Limit); |
| } |
| continue; |
| } |
| |
| switch (Active->Kind) { |
| case CodeSynthesisContext::TemplateInstantiation: { |
| Decl *D = Active->Entity; |
| if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) { |
| unsigned DiagID = diag::note_template_member_class_here; |
| if (isa<ClassTemplateSpecializationDecl>(Record)) |
| DiagID = diag::note_template_class_instantiation_here; |
| Diags.Report(Active->PointOfInstantiation, DiagID) |
| << Record << Active->InstantiationRange; |
| } else if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { |
| unsigned DiagID; |
| if (Function->getPrimaryTemplate()) |
| DiagID = diag::note_function_template_spec_here; |
| else |
| DiagID = diag::note_template_member_function_here; |
| Diags.Report(Active->PointOfInstantiation, DiagID) |
| << Function |
| << Active->InstantiationRange; |
| } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| Diags.Report(Active->PointOfInstantiation, |
| VD->isStaticDataMember()? |
| diag::note_template_static_data_member_def_here |
| : diag::note_template_variable_def_here) |
| << VD |
| << Active->InstantiationRange; |
| } else if (EnumDecl *ED = dyn_cast<EnumDecl>(D)) { |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_template_enum_def_here) |
| << ED |
| << Active->InstantiationRange; |
| } else if (FieldDecl *FD = dyn_cast<FieldDecl>(D)) { |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_template_nsdmi_here) |
| << FD << Active->InstantiationRange; |
| } else { |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_template_type_alias_instantiation_here) |
| << cast<TypeAliasTemplateDecl>(D) |
| << Active->InstantiationRange; |
| } |
| break; |
| } |
| |
| case CodeSynthesisContext::DefaultTemplateArgumentInstantiation: { |
| TemplateDecl *Template = cast<TemplateDecl>(Active->Template); |
| SmallVector<char, 128> TemplateArgsStr; |
| llvm::raw_svector_ostream OS(TemplateArgsStr); |
| Template->printName(OS); |
| printTemplateArgumentList(OS, Active->template_arguments(), |
| getPrintingPolicy()); |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_default_arg_instantiation_here) |
| << OS.str() |
| << Active->InstantiationRange; |
| break; |
| } |
| |
| case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution: { |
| FunctionTemplateDecl *FnTmpl = cast<FunctionTemplateDecl>(Active->Entity); |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_explicit_template_arg_substitution_here) |
| << FnTmpl |
| << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(), |
| Active->TemplateArgs, |
| Active->NumTemplateArgs) |
| << Active->InstantiationRange; |
| break; |
| } |
| |
| case CodeSynthesisContext::DeducedTemplateArgumentSubstitution: { |
| if (FunctionTemplateDecl *FnTmpl = |
| dyn_cast<FunctionTemplateDecl>(Active->Entity)) { |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_function_template_deduction_instantiation_here) |
| << FnTmpl |
| << getTemplateArgumentBindingsText(FnTmpl->getTemplateParameters(), |
| Active->TemplateArgs, |
| Active->NumTemplateArgs) |
| << Active->InstantiationRange; |
| } else { |
| bool IsVar = isa<VarTemplateDecl>(Active->Entity) || |
| isa<VarTemplateSpecializationDecl>(Active->Entity); |
| bool IsTemplate = false; |
| TemplateParameterList *Params; |
| if (auto *D = dyn_cast<TemplateDecl>(Active->Entity)) { |
| IsTemplate = true; |
| Params = D->getTemplateParameters(); |
| } else if (auto *D = dyn_cast<ClassTemplatePartialSpecializationDecl>( |
| Active->Entity)) { |
| Params = D->getTemplateParameters(); |
| } else if (auto *D = dyn_cast<VarTemplatePartialSpecializationDecl>( |
| Active->Entity)) { |
| Params = D->getTemplateParameters(); |
| } else { |
| llvm_unreachable("unexpected template kind"); |
| } |
| |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_deduced_template_arg_substitution_here) |
| << IsVar << IsTemplate << cast<NamedDecl>(Active->Entity) |
| << getTemplateArgumentBindingsText(Params, Active->TemplateArgs, |
| Active->NumTemplateArgs) |
| << Active->InstantiationRange; |
| } |
| break; |
| } |
| |
| case CodeSynthesisContext::DefaultFunctionArgumentInstantiation: { |
| ParmVarDecl *Param = cast<ParmVarDecl>(Active->Entity); |
| FunctionDecl *FD = cast<FunctionDecl>(Param->getDeclContext()); |
| |
| SmallVector<char, 128> TemplateArgsStr; |
| llvm::raw_svector_ostream OS(TemplateArgsStr); |
| FD->printName(OS); |
| printTemplateArgumentList(OS, Active->template_arguments(), |
| getPrintingPolicy()); |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_default_function_arg_instantiation_here) |
| << OS.str() |
| << Active->InstantiationRange; |
| break; |
| } |
| |
| case CodeSynthesisContext::PriorTemplateArgumentSubstitution: { |
| NamedDecl *Parm = cast<NamedDecl>(Active->Entity); |
| std::string Name; |
| if (!Parm->getName().empty()) |
| Name = std::string(" '") + Parm->getName().str() + "'"; |
| |
| TemplateParameterList *TemplateParams = nullptr; |
| if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template)) |
| TemplateParams = Template->getTemplateParameters(); |
| else |
| TemplateParams = |
| cast<ClassTemplatePartialSpecializationDecl>(Active->Template) |
| ->getTemplateParameters(); |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_prior_template_arg_substitution) |
| << isa<TemplateTemplateParmDecl>(Parm) |
| << Name |
| << getTemplateArgumentBindingsText(TemplateParams, |
| Active->TemplateArgs, |
| Active->NumTemplateArgs) |
| << Active->InstantiationRange; |
| break; |
| } |
| |
| case CodeSynthesisContext::DefaultTemplateArgumentChecking: { |
| TemplateParameterList *TemplateParams = nullptr; |
| if (TemplateDecl *Template = dyn_cast<TemplateDecl>(Active->Template)) |
| TemplateParams = Template->getTemplateParameters(); |
| else |
| TemplateParams = |
| cast<ClassTemplatePartialSpecializationDecl>(Active->Template) |
| ->getTemplateParameters(); |
| |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_template_default_arg_checking) |
| << getTemplateArgumentBindingsText(TemplateParams, |
| Active->TemplateArgs, |
| Active->NumTemplateArgs) |
| << Active->InstantiationRange; |
| break; |
| } |
| |
| case CodeSynthesisContext::ExceptionSpecInstantiation: |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_template_exception_spec_instantiation_here) |
| << cast<FunctionDecl>(Active->Entity) |
| << Active->InstantiationRange; |
| break; |
| |
| case CodeSynthesisContext::DeclaringSpecialMember: |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_in_declaration_of_implicit_special_member) |
| << cast<CXXRecordDecl>(Active->Entity) << Active->SpecialMember; |
| break; |
| |
| case CodeSynthesisContext::DefiningSynthesizedFunction: { |
| // FIXME: For synthesized members other than special members, produce a note. |
| auto *MD = dyn_cast<CXXMethodDecl>(Active->Entity); |
| auto CSM = MD ? getSpecialMember(MD) : CXXInvalid; |
| if (CSM != CXXInvalid) { |
| Diags.Report(Active->PointOfInstantiation, |
| diag::note_member_synthesized_at) |
| << CSM << Context.getTagDeclType(MD->getParent()); |
| } |
| break; |
| } |
| |
| case CodeSynthesisContext::Memoization: |
| break; |
| } |
| } |
| } |
| |
| Optional<TemplateDeductionInfo *> Sema::isSFINAEContext() const { |
| if (InNonInstantiationSFINAEContext) |
| return Optional<TemplateDeductionInfo *>(nullptr); |
| |
| for (SmallVectorImpl<CodeSynthesisContext>::const_reverse_iterator |
| Active = CodeSynthesisContexts.rbegin(), |
| ActiveEnd = CodeSynthesisContexts.rend(); |
| Active != ActiveEnd; |
| ++Active) |
| { |
| switch (Active->Kind) { |
| case CodeSynthesisContext::TemplateInstantiation: |
| // An instantiation of an alias template may or may not be a SFINAE |
| // context, depending on what else is on the stack. |
| if (isa<TypeAliasTemplateDecl>(Active->Entity)) |
| break; |
| // Fall through. |
| case CodeSynthesisContext::DefaultFunctionArgumentInstantiation: |
| case CodeSynthesisContext::ExceptionSpecInstantiation: |
| // This is a template instantiation, so there is no SFINAE. |
| return None; |
| |
| case CodeSynthesisContext::DefaultTemplateArgumentInstantiation: |
| case CodeSynthesisContext::PriorTemplateArgumentSubstitution: |
| case CodeSynthesisContext::DefaultTemplateArgumentChecking: |
| // A default template argument instantiation and substitution into |
| // template parameters with arguments for prior parameters may or may |
| // not be a SFINAE context; look further up the stack. |
| break; |
| |
| case CodeSynthesisContext::ExplicitTemplateArgumentSubstitution: |
| case CodeSynthesisContext::DeducedTemplateArgumentSubstitution: |
| // We're either substitution explicitly-specified template arguments |
| // or deduced template arguments, so SFINAE applies. |
| assert(Active->DeductionInfo && "Missing deduction info pointer"); |
| return Active->DeductionInfo; |
| |
| case CodeSynthesisContext::DeclaringSpecialMember: |
| case CodeSynthesisContext::DefiningSynthesizedFunction: |
| // This happens in a context unrelated to template instantiation, so |
| // there is no SFINAE. |
| return None; |
| |
| case CodeSynthesisContext::Memoization: |
| break; |
| } |
| |
| // The inner context was transparent for SFINAE. If it occurred within a |
| // non-instantiation SFINAE context, then SFINAE applies. |
| if (Active->SavedInNonInstantiationSFINAEContext) |
| return Optional<TemplateDeductionInfo *>(nullptr); |
| } |
| |
| return None; |
| } |
| |
| //===----------------------------------------------------------------------===/ |
| // Template Instantiation for Types |
| //===----------------------------------------------------------------------===/ |
| namespace { |
| class TemplateInstantiator : public TreeTransform<TemplateInstantiator> { |
| const MultiLevelTemplateArgumentList &TemplateArgs; |
| SourceLocation Loc; |
| DeclarationName Entity; |
| |
| public: |
| typedef TreeTransform<TemplateInstantiator> inherited; |
| |
| TemplateInstantiator(Sema &SemaRef, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| SourceLocation Loc, |
| DeclarationName Entity) |
| : inherited(SemaRef), TemplateArgs(TemplateArgs), Loc(Loc), |
| Entity(Entity) { } |
| |
| /// Determine whether the given type \p T has already been |
| /// transformed. |
| /// |
| /// For the purposes of template instantiation, a type has already been |
| /// transformed if it is NULL or if it is not dependent. |
| bool AlreadyTransformed(QualType T); |
| |
| /// Returns the location of the entity being instantiated, if known. |
| SourceLocation getBaseLocation() { return Loc; } |
| |
| /// Returns the name of the entity being instantiated, if any. |
| DeclarationName getBaseEntity() { return Entity; } |
| |
| /// Sets the "base" location and entity when that |
| /// information is known based on another transformation. |
| void setBase(SourceLocation Loc, DeclarationName Entity) { |
| this->Loc = Loc; |
| this->Entity = Entity; |
| } |
| |
| bool TryExpandParameterPacks(SourceLocation EllipsisLoc, |
| SourceRange PatternRange, |
| ArrayRef<UnexpandedParameterPack> Unexpanded, |
| bool &ShouldExpand, bool &RetainExpansion, |
| Optional<unsigned> &NumExpansions) { |
| return getSema().CheckParameterPacksForExpansion(EllipsisLoc, |
| PatternRange, Unexpanded, |
| TemplateArgs, |
| ShouldExpand, |
| RetainExpansion, |
| NumExpansions); |
| } |
| |
| void ExpandingFunctionParameterPack(ParmVarDecl *Pack) { |
| SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Pack); |
| } |
| |
| TemplateArgument ForgetPartiallySubstitutedPack() { |
| TemplateArgument Result; |
| if (NamedDecl *PartialPack |
| = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){ |
| MultiLevelTemplateArgumentList &TemplateArgs |
| = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs); |
| unsigned Depth, Index; |
| std::tie(Depth, Index) = getDepthAndIndex(PartialPack); |
| if (TemplateArgs.hasTemplateArgument(Depth, Index)) { |
| Result = TemplateArgs(Depth, Index); |
| TemplateArgs.setArgument(Depth, Index, TemplateArgument()); |
| } |
| } |
| |
| return Result; |
| } |
| |
| void RememberPartiallySubstitutedPack(TemplateArgument Arg) { |
| if (Arg.isNull()) |
| return; |
| |
| if (NamedDecl *PartialPack |
| = SemaRef.CurrentInstantiationScope->getPartiallySubstitutedPack()){ |
| MultiLevelTemplateArgumentList &TemplateArgs |
| = const_cast<MultiLevelTemplateArgumentList &>(this->TemplateArgs); |
| unsigned Depth, Index; |
| std::tie(Depth, Index) = getDepthAndIndex(PartialPack); |
| TemplateArgs.setArgument(Depth, Index, Arg); |
| } |
| } |
| |
| /// Transform the given declaration by instantiating a reference to |
| /// this declaration. |
| Decl *TransformDecl(SourceLocation Loc, Decl *D); |
| |
| void transformAttrs(Decl *Old, Decl *New) { |
| SemaRef.InstantiateAttrs(TemplateArgs, Old, New); |
| } |
| |
| void transformedLocalDecl(Decl *Old, Decl *New) { |
| // If we've instantiated the call operator of a lambda or the call |
| // operator template of a generic lambda, update the "instantiation of" |
| // information. |
| auto *NewMD = dyn_cast<CXXMethodDecl>(New); |
| if (NewMD && isLambdaCallOperator(NewMD)) { |
| auto *OldMD = dyn_cast<CXXMethodDecl>(Old); |
| if (auto *NewTD = NewMD->getDescribedFunctionTemplate()) |
| NewTD->setInstantiatedFromMemberTemplate( |
| OldMD->getDescribedFunctionTemplate()); |
| else |
| NewMD->setInstantiationOfMemberFunction(OldMD, |
| TSK_ImplicitInstantiation); |
| } |
| |
| SemaRef.CurrentInstantiationScope->InstantiatedLocal(Old, New); |
| |
| // We recreated a local declaration, but not by instantiating it. There |
| // may be pending dependent diagnostics to produce. |
| if (auto *DC = dyn_cast<DeclContext>(Old)) |
| SemaRef.PerformDependentDiagnostics(DC, TemplateArgs); |
| } |
| |
| /// Transform the definition of the given declaration by |
| /// instantiating it. |
| Decl *TransformDefinition(SourceLocation Loc, Decl *D); |
| |
| /// Transform the first qualifier within a scope by instantiating the |
| /// declaration. |
| NamedDecl *TransformFirstQualifierInScope(NamedDecl *D, SourceLocation Loc); |
| |
| /// Rebuild the exception declaration and register the declaration |
| /// as an instantiated local. |
| VarDecl *RebuildExceptionDecl(VarDecl *ExceptionDecl, |
| TypeSourceInfo *Declarator, |
| SourceLocation StartLoc, |
| SourceLocation NameLoc, |
| IdentifierInfo *Name); |
| |
| /// Rebuild the Objective-C exception declaration and register the |
| /// declaration as an instantiated local. |
| VarDecl *RebuildObjCExceptionDecl(VarDecl *ExceptionDecl, |
| TypeSourceInfo *TSInfo, QualType T); |
| |
| /// Check for tag mismatches when instantiating an |
| /// elaborated type. |
| QualType RebuildElaboratedType(SourceLocation KeywordLoc, |
| ElaboratedTypeKeyword Keyword, |
| NestedNameSpecifierLoc QualifierLoc, |
| QualType T); |
| |
| TemplateName |
| TransformTemplateName(CXXScopeSpec &SS, TemplateName Name, |
| SourceLocation NameLoc, |
| QualType ObjectType = QualType(), |
| NamedDecl *FirstQualifierInScope = nullptr, |
| bool AllowInjectedClassName = false); |
| |
| const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH); |
| |
| ExprResult TransformPredefinedExpr(PredefinedExpr *E); |
| ExprResult TransformDeclRefExpr(DeclRefExpr *E); |
| ExprResult TransformCXXDefaultArgExpr(CXXDefaultArgExpr *E); |
| |
| ExprResult TransformTemplateParmRefExpr(DeclRefExpr *E, |
| NonTypeTemplateParmDecl *D); |
| ExprResult TransformSubstNonTypeTemplateParmPackExpr( |
| SubstNonTypeTemplateParmPackExpr *E); |
| |
| /// Rebuild a DeclRefExpr for a ParmVarDecl reference. |
| ExprResult RebuildParmVarDeclRefExpr(ParmVarDecl *PD, SourceLocation Loc); |
| |
| /// Transform a reference to a function parameter pack. |
| ExprResult TransformFunctionParmPackRefExpr(DeclRefExpr *E, |
| ParmVarDecl *PD); |
| |
| /// Transform a FunctionParmPackExpr which was built when we couldn't |
| /// expand a function parameter pack reference which refers to an expanded |
| /// pack. |
| ExprResult TransformFunctionParmPackExpr(FunctionParmPackExpr *E); |
| |
| QualType TransformFunctionProtoType(TypeLocBuilder &TLB, |
| FunctionProtoTypeLoc TL) { |
| // Call the base version; it will forward to our overridden version below. |
| return inherited::TransformFunctionProtoType(TLB, TL); |
| } |
| |
| template<typename Fn> |
| QualType TransformFunctionProtoType(TypeLocBuilder &TLB, |
| FunctionProtoTypeLoc TL, |
| CXXRecordDecl *ThisContext, |
| unsigned ThisTypeQuals, |
| Fn TransformExceptionSpec); |
| |
| ParmVarDecl *TransformFunctionTypeParam(ParmVarDecl *OldParm, |
| int indexAdjustment, |
| Optional<unsigned> NumExpansions, |
| bool ExpectParameterPack); |
| |
| /// Transforms a template type parameter type by performing |
| /// substitution of the corresponding template type argument. |
| QualType TransformTemplateTypeParmType(TypeLocBuilder &TLB, |
| TemplateTypeParmTypeLoc TL); |
| |
| /// Transforms an already-substituted template type parameter pack |
| /// into either itself (if we aren't substituting into its pack expansion) |
| /// or the appropriate substituted argument. |
| QualType TransformSubstTemplateTypeParmPackType(TypeLocBuilder &TLB, |
| SubstTemplateTypeParmPackTypeLoc TL); |
| |
| ExprResult TransformLambdaExpr(LambdaExpr *E) { |
| LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true); |
| return TreeTransform<TemplateInstantiator>::TransformLambdaExpr(E); |
| } |
| |
| TemplateParameterList *TransformTemplateParameterList( |
| TemplateParameterList *OrigTPL) { |
| if (!OrigTPL || !OrigTPL->size()) return OrigTPL; |
| |
| DeclContext *Owner = OrigTPL->getParam(0)->getDeclContext(); |
| TemplateDeclInstantiator DeclInstantiator(getSema(), |
| /* DeclContext *Owner */ Owner, TemplateArgs); |
| return DeclInstantiator.SubstTemplateParams(OrigTPL); |
| } |
| private: |
| ExprResult transformNonTypeTemplateParmRef(NonTypeTemplateParmDecl *parm, |
| SourceLocation loc, |
| TemplateArgument arg); |
| }; |
| } |
| |
| bool TemplateInstantiator::AlreadyTransformed(QualType T) { |
| if (T.isNull()) |
| return true; |
| |
| if (T->isInstantiationDependentType() || T->isVariablyModifiedType()) |
| return false; |
| |
| getSema().MarkDeclarationsReferencedInType(Loc, T); |
| return true; |
| } |
| |
| static TemplateArgument |
| getPackSubstitutedTemplateArgument(Sema &S, TemplateArgument Arg) { |
| assert(S.ArgumentPackSubstitutionIndex >= 0); |
| assert(S.ArgumentPackSubstitutionIndex < (int)Arg.pack_size()); |
| Arg = Arg.pack_begin()[S.ArgumentPackSubstitutionIndex]; |
| if (Arg.isPackExpansion()) |
| Arg = Arg.getPackExpansionPattern(); |
| return Arg; |
| } |
| |
| Decl *TemplateInstantiator::TransformDecl(SourceLocation Loc, Decl *D) { |
| if (!D) |
| return nullptr; |
| |
| if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) { |
| if (TTP->getDepth() < TemplateArgs.getNumLevels()) { |
| // If the corresponding template argument is NULL or non-existent, it's |
| // because we are performing instantiation from explicitly-specified |
| // template arguments in a function template, but there were some |
| // arguments left unspecified. |
| if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(), |
| TTP->getPosition())) |
| return D; |
| |
| TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition()); |
| |
| if (TTP->isParameterPack()) { |
| assert(Arg.getKind() == TemplateArgument::Pack && |
| "Missing argument pack"); |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| } |
| |
| TemplateName Template = Arg.getAsTemplate().getNameToSubstitute(); |
| assert(!Template.isNull() && Template.getAsTemplateDecl() && |
| "Wrong kind of template template argument"); |
| return Template.getAsTemplateDecl(); |
| } |
| |
| // Fall through to find the instantiated declaration for this template |
| // template parameter. |
| } |
| |
| return SemaRef.FindInstantiatedDecl(Loc, cast<NamedDecl>(D), TemplateArgs); |
| } |
| |
| Decl *TemplateInstantiator::TransformDefinition(SourceLocation Loc, Decl *D) { |
| Decl *Inst = getSema().SubstDecl(D, getSema().CurContext, TemplateArgs); |
| if (!Inst) |
| return nullptr; |
| |
| getSema().CurrentInstantiationScope->InstantiatedLocal(D, Inst); |
| return Inst; |
| } |
| |
| NamedDecl * |
| TemplateInstantiator::TransformFirstQualifierInScope(NamedDecl *D, |
| SourceLocation Loc) { |
| // If the first part of the nested-name-specifier was a template type |
| // parameter, instantiate that type parameter down to a tag type. |
| if (TemplateTypeParmDecl *TTPD = dyn_cast_or_null<TemplateTypeParmDecl>(D)) { |
| const TemplateTypeParmType *TTP |
| = cast<TemplateTypeParmType>(getSema().Context.getTypeDeclType(TTPD)); |
| |
| if (TTP->getDepth() < TemplateArgs.getNumLevels()) { |
| // FIXME: This needs testing w/ member access expressions. |
| TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getIndex()); |
| |
| if (TTP->isParameterPack()) { |
| assert(Arg.getKind() == TemplateArgument::Pack && |
| "Missing argument pack"); |
| |
| if (getSema().ArgumentPackSubstitutionIndex == -1) |
| return nullptr; |
| |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| } |
| |
| QualType T = Arg.getAsType(); |
| if (T.isNull()) |
| return cast_or_null<NamedDecl>(TransformDecl(Loc, D)); |
| |
| if (const TagType *Tag = T->getAs<TagType>()) |
| return Tag->getDecl(); |
| |
| // The resulting type is not a tag; complain. |
| getSema().Diag(Loc, diag::err_nested_name_spec_non_tag) << T; |
| return nullptr; |
| } |
| } |
| |
| return cast_or_null<NamedDecl>(TransformDecl(Loc, D)); |
| } |
| |
| VarDecl * |
| TemplateInstantiator::RebuildExceptionDecl(VarDecl *ExceptionDecl, |
| TypeSourceInfo *Declarator, |
| SourceLocation StartLoc, |
| SourceLocation NameLoc, |
| IdentifierInfo *Name) { |
| VarDecl *Var = inherited::RebuildExceptionDecl(ExceptionDecl, Declarator, |
| StartLoc, NameLoc, Name); |
| if (Var) |
| getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var); |
| return Var; |
| } |
| |
| VarDecl *TemplateInstantiator::RebuildObjCExceptionDecl(VarDecl *ExceptionDecl, |
| TypeSourceInfo *TSInfo, |
| QualType T) { |
| VarDecl *Var = inherited::RebuildObjCExceptionDecl(ExceptionDecl, TSInfo, T); |
| if (Var) |
| getSema().CurrentInstantiationScope->InstantiatedLocal(ExceptionDecl, Var); |
| return Var; |
| } |
| |
| QualType |
| TemplateInstantiator::RebuildElaboratedType(SourceLocation KeywordLoc, |
| ElaboratedTypeKeyword Keyword, |
| NestedNameSpecifierLoc QualifierLoc, |
| QualType T) { |
| if (const TagType *TT = T->getAs<TagType>()) { |
| TagDecl* TD = TT->getDecl(); |
| |
| SourceLocation TagLocation = KeywordLoc; |
| |
| IdentifierInfo *Id = TD->getIdentifier(); |
| |
| // TODO: should we even warn on struct/class mismatches for this? Seems |
| // like it's likely to produce a lot of spurious errors. |
| if (Id && Keyword != ETK_None && Keyword != ETK_Typename) { |
| TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForKeyword(Keyword); |
| if (!SemaRef.isAcceptableTagRedeclaration(TD, Kind, /*isDefinition*/false, |
| TagLocation, Id)) { |
| SemaRef.Diag(TagLocation, diag::err_use_with_wrong_tag) |
| << Id |
| << FixItHint::CreateReplacement(SourceRange(TagLocation), |
| TD->getKindName()); |
| SemaRef.Diag(TD->getLocation(), diag::note_previous_use); |
| } |
| } |
| } |
| |
| return TreeTransform<TemplateInstantiator>::RebuildElaboratedType(KeywordLoc, |
| Keyword, |
| QualifierLoc, |
| T); |
| } |
| |
| TemplateName TemplateInstantiator::TransformTemplateName( |
| CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc, |
| QualType ObjectType, NamedDecl *FirstQualifierInScope, |
| bool AllowInjectedClassName) { |
| if (TemplateTemplateParmDecl *TTP |
| = dyn_cast_or_null<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())) { |
| if (TTP->getDepth() < TemplateArgs.getNumLevels()) { |
| // If the corresponding template argument is NULL or non-existent, it's |
| // because we are performing instantiation from explicitly-specified |
| // template arguments in a function template, but there were some |
| // arguments left unspecified. |
| if (!TemplateArgs.hasTemplateArgument(TTP->getDepth(), |
| TTP->getPosition())) |
| return Name; |
| |
| TemplateArgument Arg = TemplateArgs(TTP->getDepth(), TTP->getPosition()); |
| |
| if (TTP->isParameterPack()) { |
| assert(Arg.getKind() == TemplateArgument::Pack && |
| "Missing argument pack"); |
| |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| // We have the template argument pack to substitute, but we're not |
| // actually expanding the enclosing pack expansion yet. So, just |
| // keep the entire argument pack. |
| return getSema().Context.getSubstTemplateTemplateParmPack(TTP, Arg); |
| } |
| |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| } |
| |
| TemplateName Template = Arg.getAsTemplate().getNameToSubstitute(); |
| assert(!Template.isNull() && "Null template template argument"); |
| assert(!Template.getAsQualifiedTemplateName() && |
| "template decl to substitute is qualified?"); |
| |
| Template = getSema().Context.getSubstTemplateTemplateParm(TTP, Template); |
| return Template; |
| } |
| } |
| |
| if (SubstTemplateTemplateParmPackStorage *SubstPack |
| = Name.getAsSubstTemplateTemplateParmPack()) { |
| if (getSema().ArgumentPackSubstitutionIndex == -1) |
| return Name; |
| |
| TemplateArgument Arg = SubstPack->getArgumentPack(); |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| return Arg.getAsTemplate().getNameToSubstitute(); |
| } |
| |
| return inherited::TransformTemplateName(SS, Name, NameLoc, ObjectType, |
| FirstQualifierInScope, |
| AllowInjectedClassName); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformPredefinedExpr(PredefinedExpr *E) { |
| if (!E->isTypeDependent()) |
| return E; |
| |
| return getSema().BuildPredefinedExpr(E->getLocation(), E->getIdentType()); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformTemplateParmRefExpr(DeclRefExpr *E, |
| NonTypeTemplateParmDecl *NTTP) { |
| // If the corresponding template argument is NULL or non-existent, it's |
| // because we are performing instantiation from explicitly-specified |
| // template arguments in a function template, but there were some |
| // arguments left unspecified. |
| if (!TemplateArgs.hasTemplateArgument(NTTP->getDepth(), |
| NTTP->getPosition())) |
| return E; |
| |
| TemplateArgument Arg = TemplateArgs(NTTP->getDepth(), NTTP->getPosition()); |
| |
| if (TemplateArgs.getNumLevels() != TemplateArgs.getNumSubstitutedLevels()) { |
| // We're performing a partial substitution, so the substituted argument |
| // could be dependent. As a result we can't create a SubstNonType*Expr |
| // node now, since that represents a fully-substituted argument. |
| // FIXME: We should have some AST representation for this. |
| if (Arg.getKind() == TemplateArgument::Pack) { |
| // FIXME: This won't work for alias templates. |
| assert(Arg.pack_size() == 1 && Arg.pack_begin()->isPackExpansion() && |
| "unexpected pack arguments in partial substitution"); |
| Arg = Arg.pack_begin()->getPackExpansionPattern(); |
| } |
| assert(Arg.getKind() == TemplateArgument::Expression && |
| "unexpected nontype template argument kind in partial substitution"); |
| return Arg.getAsExpr(); |
| } |
| |
| if (NTTP->isParameterPack()) { |
| assert(Arg.getKind() == TemplateArgument::Pack && |
| "Missing argument pack"); |
| |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| // We have an argument pack, but we can't select a particular argument |
| // out of it yet. Therefore, we'll build an expression to hold on to that |
| // argument pack. |
| QualType TargetType = SemaRef.SubstType(NTTP->getType(), TemplateArgs, |
| E->getLocation(), |
| NTTP->getDeclName()); |
| if (TargetType.isNull()) |
| return ExprError(); |
| |
| return new (SemaRef.Context) SubstNonTypeTemplateParmPackExpr( |
| TargetType.getNonLValueExprType(SemaRef.Context), |
| TargetType->isReferenceType() ? VK_LValue : VK_RValue, NTTP, |
| E->getLocation(), Arg); |
| } |
| |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| } |
| |
| return transformNonTypeTemplateParmRef(NTTP, E->getLocation(), Arg); |
| } |
| |
| const LoopHintAttr * |
| TemplateInstantiator::TransformLoopHintAttr(const LoopHintAttr *LH) { |
| Expr *TransformedExpr = getDerived().TransformExpr(LH->getValue()).get(); |
| |
| if (TransformedExpr == LH->getValue()) |
| return LH; |
| |
| // Generate error if there is a problem with the value. |
| if (getSema().CheckLoopHintExpr(TransformedExpr, LH->getLocation())) |
| return LH; |
| |
| // Create new LoopHintValueAttr with integral expression in place of the |
| // non-type template parameter. |
| return LoopHintAttr::CreateImplicit( |
| getSema().Context, LH->getSemanticSpelling(), LH->getOption(), |
| LH->getState(), TransformedExpr, LH->getRange()); |
| } |
| |
| ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef( |
| NonTypeTemplateParmDecl *parm, |
| SourceLocation loc, |
| TemplateArgument arg) { |
| ExprResult result; |
| QualType type; |
| |
| // The template argument itself might be an expression, in which |
| // case we just return that expression. |
| if (arg.getKind() == TemplateArgument::Expression) { |
| Expr *argExpr = arg.getAsExpr(); |
| result = argExpr; |
| type = argExpr->getType(); |
| |
| } else if (arg.getKind() == TemplateArgument::Declaration || |
| arg.getKind() == TemplateArgument::NullPtr) { |
| ValueDecl *VD; |
| if (arg.getKind() == TemplateArgument::Declaration) { |
| VD = arg.getAsDecl(); |
| |
| // Find the instantiation of the template argument. This is |
| // required for nested templates. |
| VD = cast_or_null<ValueDecl>( |
| getSema().FindInstantiatedDecl(loc, VD, TemplateArgs)); |
| if (!VD) |
| return ExprError(); |
| } else { |
| // Propagate NULL template argument. |
| VD = nullptr; |
| } |
| |
| // Derive the type we want the substituted decl to have. This had |
| // better be non-dependent, or these checks will have serious problems. |
| if (parm->isExpandedParameterPack()) { |
| type = parm->getExpansionType(SemaRef.ArgumentPackSubstitutionIndex); |
| } else if (parm->isParameterPack() && |
| isa<PackExpansionType>(parm->getType())) { |
| type = SemaRef.SubstType( |
| cast<PackExpansionType>(parm->getType())->getPattern(), |
| TemplateArgs, loc, parm->getDeclName()); |
| } else { |
| type = SemaRef.SubstType(VD ? arg.getParamTypeForDecl() : arg.getNullPtrType(), |
| TemplateArgs, loc, parm->getDeclName()); |
| } |
| assert(!type.isNull() && "type substitution failed for param type"); |
| assert(!type->isDependentType() && "param type still dependent"); |
| result = SemaRef.BuildExpressionFromDeclTemplateArgument(arg, type, loc); |
| |
| if (!result.isInvalid()) type = result.get()->getType(); |
| } else { |
| result = SemaRef.BuildExpressionFromIntegralTemplateArgument(arg, loc); |
| |
| // Note that this type can be different from the type of 'result', |
| // e.g. if it's an enum type. |
| type = arg.getIntegralType(); |
| } |
| if (result.isInvalid()) return ExprError(); |
| |
| Expr *resultExpr = result.get(); |
| return new (SemaRef.Context) SubstNonTypeTemplateParmExpr( |
| type, resultExpr->getValueKind(), loc, parm, resultExpr); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformSubstNonTypeTemplateParmPackExpr( |
| SubstNonTypeTemplateParmPackExpr *E) { |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| // We aren't expanding the parameter pack, so just return ourselves. |
| return E; |
| } |
| |
| TemplateArgument Arg = E->getArgumentPack(); |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| return transformNonTypeTemplateParmRef(E->getParameterPack(), |
| E->getParameterPackLocation(), |
| Arg); |
| } |
| |
| ExprResult |
| TemplateInstantiator::RebuildParmVarDeclRefExpr(ParmVarDecl *PD, |
| SourceLocation Loc) { |
| DeclarationNameInfo NameInfo(PD->getDeclName(), Loc); |
| return getSema().BuildDeclarationNameExpr(CXXScopeSpec(), NameInfo, PD); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformFunctionParmPackExpr(FunctionParmPackExpr *E) { |
| if (getSema().ArgumentPackSubstitutionIndex != -1) { |
| // We can expand this parameter pack now. |
| ParmVarDecl *D = E->getExpansion(getSema().ArgumentPackSubstitutionIndex); |
| ValueDecl *VD = cast_or_null<ValueDecl>(TransformDecl(E->getExprLoc(), D)); |
| if (!VD) |
| return ExprError(); |
| return RebuildParmVarDeclRefExpr(cast<ParmVarDecl>(VD), E->getExprLoc()); |
| } |
| |
| QualType T = TransformType(E->getType()); |
| if (T.isNull()) |
| return ExprError(); |
| |
| // Transform each of the parameter expansions into the corresponding |
| // parameters in the instantiation of the function decl. |
| SmallVector<ParmVarDecl *, 8> Parms; |
| Parms.reserve(E->getNumExpansions()); |
| for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end(); |
| I != End; ++I) { |
| ParmVarDecl *D = |
| cast_or_null<ParmVarDecl>(TransformDecl(E->getExprLoc(), *I)); |
| if (!D) |
| return ExprError(); |
| Parms.push_back(D); |
| } |
| |
| return FunctionParmPackExpr::Create(getSema().Context, T, |
| E->getParameterPack(), |
| E->getParameterPackLocation(), Parms); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformFunctionParmPackRefExpr(DeclRefExpr *E, |
| ParmVarDecl *PD) { |
| typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack; |
| llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found |
| = getSema().CurrentInstantiationScope->findInstantiationOf(PD); |
| assert(Found && "no instantiation for parameter pack"); |
| |
| Decl *TransformedDecl; |
| if (DeclArgumentPack *Pack = Found->dyn_cast<DeclArgumentPack *>()) { |
| // If this is a reference to a function parameter pack which we can |
| // substitute but can't yet expand, build a FunctionParmPackExpr for it. |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| QualType T = TransformType(E->getType()); |
| if (T.isNull()) |
| return ExprError(); |
| return FunctionParmPackExpr::Create(getSema().Context, T, PD, |
| E->getExprLoc(), *Pack); |
| } |
| |
| TransformedDecl = (*Pack)[getSema().ArgumentPackSubstitutionIndex]; |
| } else { |
| TransformedDecl = Found->get<Decl*>(); |
| } |
| |
| // We have either an unexpanded pack or a specific expansion. |
| return RebuildParmVarDeclRefExpr(cast<ParmVarDecl>(TransformedDecl), |
| E->getExprLoc()); |
| } |
| |
| ExprResult |
| TemplateInstantiator::TransformDeclRefExpr(DeclRefExpr *E) { |
| NamedDecl *D = E->getDecl(); |
| |
| // Handle references to non-type template parameters and non-type template |
| // parameter packs. |
| if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) { |
| if (NTTP->getDepth() < TemplateArgs.getNumLevels()) |
| return TransformTemplateParmRefExpr(E, NTTP); |
| |
| // We have a non-type template parameter that isn't fully substituted; |
| // FindInstantiatedDecl will find it in the local instantiation scope. |
| } |
| |
| // Handle references to function parameter packs. |
| if (ParmVarDecl *PD = dyn_cast<ParmVarDecl>(D)) |
| if (PD->isParameterPack()) |
| return TransformFunctionParmPackRefExpr(E, PD); |
| |
| return TreeTransform<TemplateInstantiator>::TransformDeclRefExpr(E); |
| } |
| |
| ExprResult TemplateInstantiator::TransformCXXDefaultArgExpr( |
| CXXDefaultArgExpr *E) { |
| assert(!cast<FunctionDecl>(E->getParam()->getDeclContext())-> |
| getDescribedFunctionTemplate() && |
| "Default arg expressions are never formed in dependent cases."); |
| return SemaRef.BuildCXXDefaultArgExpr(E->getUsedLocation(), |
| cast<FunctionDecl>(E->getParam()->getDeclContext()), |
| E->getParam()); |
| } |
| |
| template<typename Fn> |
| QualType TemplateInstantiator::TransformFunctionProtoType(TypeLocBuilder &TLB, |
| FunctionProtoTypeLoc TL, |
| CXXRecordDecl *ThisContext, |
| unsigned ThisTypeQuals, |
| Fn TransformExceptionSpec) { |
| // We need a local instantiation scope for this function prototype. |
| LocalInstantiationScope Scope(SemaRef, /*CombineWithOuterScope=*/true); |
| return inherited::TransformFunctionProtoType( |
| TLB, TL, ThisContext, ThisTypeQuals, TransformExceptionSpec); |
| } |
| |
| ParmVarDecl * |
| TemplateInstantiator::TransformFunctionTypeParam(ParmVarDecl *OldParm, |
| int indexAdjustment, |
| Optional<unsigned> NumExpansions, |
| bool ExpectParameterPack) { |
| return SemaRef.SubstParmVarDecl(OldParm, TemplateArgs, indexAdjustment, |
| NumExpansions, ExpectParameterPack); |
| } |
| |
| QualType |
| TemplateInstantiator::TransformTemplateTypeParmType(TypeLocBuilder &TLB, |
| TemplateTypeParmTypeLoc TL) { |
| const TemplateTypeParmType *T = TL.getTypePtr(); |
| if (T->getDepth() < TemplateArgs.getNumLevels()) { |
| // Replace the template type parameter with its corresponding |
| // template argument. |
| |
| // If the corresponding template argument is NULL or doesn't exist, it's |
| // because we are performing instantiation from explicitly-specified |
| // template arguments in a function template class, but there were some |
| // arguments left unspecified. |
| if (!TemplateArgs.hasTemplateArgument(T->getDepth(), T->getIndex())) { |
| TemplateTypeParmTypeLoc NewTL |
| = TLB.push<TemplateTypeParmTypeLoc>(TL.getType()); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return TL.getType(); |
| } |
| |
| TemplateArgument Arg = TemplateArgs(T->getDepth(), T->getIndex()); |
| |
| if (T->isParameterPack()) { |
| assert(Arg.getKind() == TemplateArgument::Pack && |
| "Missing argument pack"); |
| |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| // We have the template argument pack, but we're not expanding the |
| // enclosing pack expansion yet. Just save the template argument |
| // pack for later substitution. |
| QualType Result |
| = getSema().Context.getSubstTemplateTypeParmPackType(T, Arg); |
| SubstTemplateTypeParmPackTypeLoc NewTL |
| = TLB.push<SubstTemplateTypeParmPackTypeLoc>(Result); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return Result; |
| } |
| |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| } |
| |
| assert(Arg.getKind() == TemplateArgument::Type && |
| "Template argument kind mismatch"); |
| |
| QualType Replacement = Arg.getAsType(); |
| |
| // TODO: only do this uniquing once, at the start of instantiation. |
| QualType Result |
| = getSema().Context.getSubstTemplateTypeParmType(T, Replacement); |
| SubstTemplateTypeParmTypeLoc NewTL |
| = TLB.push<SubstTemplateTypeParmTypeLoc>(Result); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return Result; |
| } |
| |
| // The template type parameter comes from an inner template (e.g., |
| // the template parameter list of a member template inside the |
| // template we are instantiating). Create a new template type |
| // parameter with the template "level" reduced by one. |
| TemplateTypeParmDecl *NewTTPDecl = nullptr; |
| if (TemplateTypeParmDecl *OldTTPDecl = T->getDecl()) |
| NewTTPDecl = cast_or_null<TemplateTypeParmDecl>( |
| TransformDecl(TL.getNameLoc(), OldTTPDecl)); |
| |
| QualType Result = getSema().Context.getTemplateTypeParmType( |
| T->getDepth() - TemplateArgs.getNumSubstitutedLevels(), T->getIndex(), |
| T->isParameterPack(), NewTTPDecl); |
| TemplateTypeParmTypeLoc NewTL = TLB.push<TemplateTypeParmTypeLoc>(Result); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return Result; |
| } |
| |
| QualType |
| TemplateInstantiator::TransformSubstTemplateTypeParmPackType( |
| TypeLocBuilder &TLB, |
| SubstTemplateTypeParmPackTypeLoc TL) { |
| if (getSema().ArgumentPackSubstitutionIndex == -1) { |
| // We aren't expanding the parameter pack, so just return ourselves. |
| SubstTemplateTypeParmPackTypeLoc NewTL |
| = TLB.push<SubstTemplateTypeParmPackTypeLoc>(TL.getType()); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return TL.getType(); |
| } |
| |
| TemplateArgument Arg = TL.getTypePtr()->getArgumentPack(); |
| Arg = getPackSubstitutedTemplateArgument(getSema(), Arg); |
| QualType Result = Arg.getAsType(); |
| |
| Result = getSema().Context.getSubstTemplateTypeParmType( |
| TL.getTypePtr()->getReplacedParameter(), |
| Result); |
| SubstTemplateTypeParmTypeLoc NewTL |
| = TLB.push<SubstTemplateTypeParmTypeLoc>(Result); |
| NewTL.setNameLoc(TL.getNameLoc()); |
| return Result; |
| } |
| |
| /// Perform substitution on the type T with a given set of template |
| /// arguments. |
| /// |
| /// This routine substitutes the given template arguments into the |
| /// type T and produces the instantiated type. |
| /// |
| /// \param T the type into which the template arguments will be |
| /// substituted. If this type is not dependent, it will be returned |
| /// immediately. |
| /// |
| /// \param Args the template arguments that will be |
| /// substituted for the top-level template parameters within T. |
| /// |
| /// \param Loc the location in the source code where this substitution |
| /// is being performed. It will typically be the location of the |
| /// declarator (if we're instantiating the type of some declaration) |
| /// or the location of the type in the source code (if, e.g., we're |
| /// instantiating the type of a cast expression). |
| /// |
| /// \param Entity the name of the entity associated with a declaration |
| /// being instantiated (if any). May be empty to indicate that there |
| /// is no such entity (if, e.g., this is a type that occurs as part of |
| /// a cast expression) or that the entity has no name (e.g., an |
| /// unnamed function parameter). |
| /// |
| /// \param AllowDeducedTST Whether a DeducedTemplateSpecializationType is |
| /// acceptable as the top level type of the result. |
| /// |
| /// \returns If the instantiation succeeds, the instantiated |
| /// type. Otherwise, produces diagnostics and returns a NULL type. |
| TypeSourceInfo *Sema::SubstType(TypeSourceInfo *T, |
| const MultiLevelTemplateArgumentList &Args, |
| SourceLocation Loc, |
| DeclarationName Entity, |
| bool AllowDeducedTST) { |
| assert(!CodeSynthesisContexts.empty() && |
| "Cannot perform an instantiation without some context on the " |
| "instantiation stack"); |
| |
| if (!T->getType()->isInstantiationDependentType() && |
| !T->getType()->isVariablyModifiedType()) |
| return T; |
| |
| TemplateInstantiator Instantiator(*this, Args, Loc, Entity); |
| return AllowDeducedTST ? Instantiator.TransformTypeWithDeducedTST(T) |
| : Instantiator.TransformType(T); |
| } |
| |
| TypeSourceInfo *Sema::SubstType(TypeLoc TL, |
| const MultiLevelTemplateArgumentList &Args, |
| SourceLocation Loc, |
| DeclarationName Entity) { |
| assert(!CodeSynthesisContexts.empty() && |
| "Cannot perform an instantiation without some context on the " |
| "instantiation stack"); |
| |
| if (TL.getType().isNull()) |
| return nullptr; |
| |
| if (!TL.getType()->isInstantiationDependentType() && |
| !TL.getType()->isVariablyModifiedType()) { |
| // FIXME: Make a copy of the TypeLoc data here, so that we can |
| // return a new TypeSourceInfo. Inefficient! |
| TypeLocBuilder TLB; |
| TLB.pushFullCopy(TL); |
| return TLB.getTypeSourceInfo(Context, TL.getType()); |
| } |
| |
| TemplateInstantiator Instantiator(*this, Args, Loc, Entity); |
| TypeLocBuilder TLB; |
| TLB.reserve(TL.getFullDataSize()); |
| QualType Result = Instantiator.TransformType(TLB, TL); |
| if (Result.isNull()) |
| return nullptr; |
| |
| return TLB.getTypeSourceInfo(Context, Result); |
| } |
| |
| /// Deprecated form of the above. |
| QualType Sema::SubstType(QualType T, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| SourceLocation Loc, DeclarationName Entity) { |
| assert(!CodeSynthesisContexts.empty() && |
| "Cannot perform an instantiation without some context on the " |
| "instantiation stack"); |
| |
| // If T is not a dependent type or a variably-modified type, there |
| // is nothing to do. |
| if (!T->isInstantiationDependentType() && !T->isVariablyModifiedType()) |
| return T; |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, Loc, Entity); |
| return Instantiator.TransformType(T); |
| } |
| |
| static bool NeedsInstantiationAsFunctionType(TypeSourceInfo *T) { |
| if (T->getType()->isInstantiationDependentType() || |
| T->getType()->isVariablyModifiedType()) |
| return true; |
| |
| TypeLoc TL = T->getTypeLoc().IgnoreParens(); |
| if (!TL.getAs<FunctionProtoTypeLoc>()) |
| return false; |
| |
| FunctionProtoTypeLoc FP = TL.castAs<FunctionProtoTypeLoc>(); |
| for (ParmVarDecl *P : FP.getParams()) { |
| // This must be synthesized from a typedef. |
| if (!P) continue; |
| |
| // If there are any parameters, a new TypeSourceInfo that refers to the |
| // instantiated parameters must be built. |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /// A form of SubstType intended specifically for instantiating the |
| /// type of a FunctionDecl. Its purpose is solely to force the |
| /// instantiation of default-argument expressions and to avoid |
| /// instantiating an exception-specification. |
| TypeSourceInfo *Sema::SubstFunctionDeclType(TypeSourceInfo *T, |
| const MultiLevelTemplateArgumentList &Args, |
| SourceLocation Loc, |
| DeclarationName Entity, |
| CXXRecordDecl *ThisContext, |
| unsigned ThisTypeQuals) { |
| assert(!CodeSynthesisContexts.empty() && |
| "Cannot perform an instantiation without some context on the " |
| "instantiation stack"); |
| |
| if (!NeedsInstantiationAsFunctionType(T)) |
| return T; |
| |
| TemplateInstantiator Instantiator(*this, Args, Loc, Entity); |
| |
| TypeLocBuilder TLB; |
| |
| TypeLoc TL = T->getTypeLoc(); |
| TLB.reserve(TL.getFullDataSize()); |
| |
| QualType Result; |
| |
| if (FunctionProtoTypeLoc Proto = |
| TL.IgnoreParens().getAs<FunctionProtoTypeLoc>()) { |
| // Instantiate the type, other than its exception specification. The |
| // exception specification is instantiated in InitFunctionInstantiation |
| // once we've built the FunctionDecl. |
| // FIXME: Set the exception specification to EST_Uninstantiated here, |
| // instead of rebuilding the function type again later. |
| Result = Instantiator.TransformFunctionProtoType( |
| TLB, Proto, ThisContext, ThisTypeQuals, |
| [](FunctionProtoType::ExceptionSpecInfo &ESI, |
| bool &Changed) { return false; }); |
| } else { |
| Result = Instantiator.TransformType(TLB, TL); |
| } |
| if (Result.isNull()) |
| return nullptr; |
| |
| return TLB.getTypeSourceInfo(Context, Result); |
| } |
| |
| bool Sema::SubstExceptionSpec(SourceLocation Loc, |
| FunctionProtoType::ExceptionSpecInfo &ESI, |
| SmallVectorImpl<QualType> &ExceptionStorage, |
| const MultiLevelTemplateArgumentList &Args) { |
| assert(ESI.Type != EST_Uninstantiated); |
| |
| bool Changed = false; |
| TemplateInstantiator Instantiator(*this, Args, Loc, DeclarationName()); |
| return Instantiator.TransformExceptionSpec(Loc, ESI, ExceptionStorage, |
| Changed); |
| } |
| |
| void Sema::SubstExceptionSpec(FunctionDecl *New, const FunctionProtoType *Proto, |
| const MultiLevelTemplateArgumentList &Args) { |
| FunctionProtoType::ExceptionSpecInfo ESI = |
| Proto->getExtProtoInfo().ExceptionSpec; |
| |
| SmallVector<QualType, 4> ExceptionStorage; |
| if (SubstExceptionSpec(New->getTypeSourceInfo()->getTypeLoc().getLocEnd(), |
| ESI, ExceptionStorage, Args)) |
| // On error, recover by dropping the exception specification. |
| ESI.Type = EST_None; |
| |
| UpdateExceptionSpec(New, ESI); |
| } |
| |
| ParmVarDecl *Sema::SubstParmVarDecl(ParmVarDecl *OldParm, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| int indexAdjustment, |
| Optional<unsigned> NumExpansions, |
| bool ExpectParameterPack) { |
| TypeSourceInfo *OldDI = OldParm->getTypeSourceInfo(); |
| TypeSourceInfo *NewDI = nullptr; |
| |
| TypeLoc OldTL = OldDI->getTypeLoc(); |
| if (PackExpansionTypeLoc ExpansionTL = OldTL.getAs<PackExpansionTypeLoc>()) { |
| |
| // We have a function parameter pack. Substitute into the pattern of the |
| // expansion. |
| NewDI = SubstType(ExpansionTL.getPatternLoc(), TemplateArgs, |
| OldParm->getLocation(), OldParm->getDeclName()); |
| if (!NewDI) |
| return nullptr; |
| |
| if (NewDI->getType()->containsUnexpandedParameterPack()) { |
| // We still have unexpanded parameter packs, which means that |
| // our function parameter is still a function parameter pack. |
| // Therefore, make its type a pack expansion type. |
| NewDI = CheckPackExpansion(NewDI, ExpansionTL.getEllipsisLoc(), |
| NumExpansions); |
| } else if (ExpectParameterPack) { |
| // We expected to get a parameter pack but didn't (because the type |
| // itself is not a pack expansion type), so complain. This can occur when |
| // the substitution goes through an alias template that "loses" the |
| // pack expansion. |
| Diag(OldParm->getLocation(), |
| diag::err_function_parameter_pack_without_parameter_packs) |
| << NewDI->getType(); |
| return nullptr; |
| } |
| } else { |
| NewDI = SubstType(OldDI, TemplateArgs, OldParm->getLocation(), |
| OldParm->getDeclName()); |
| } |
| |
| if (!NewDI) |
| return nullptr; |
| |
| if (NewDI->getType()->isVoidType()) { |
| Diag(OldParm->getLocation(), diag::err_param_with_void_type); |
| return nullptr; |
| } |
| |
| ParmVarDecl *NewParm = CheckParameter(Context.getTranslationUnitDecl(), |
| OldParm->getInnerLocStart(), |
| OldParm->getLocation(), |
| OldParm->getIdentifier(), |
| NewDI->getType(), NewDI, |
| OldParm->getStorageClass()); |
| if (!NewParm) |
| return nullptr; |
| |
| // Mark the (new) default argument as uninstantiated (if any). |
| if (OldParm->hasUninstantiatedDefaultArg()) { |
| Expr *Arg = OldParm->getUninstantiatedDefaultArg(); |
| NewParm->setUninstantiatedDefaultArg(Arg); |
| } else if (OldParm->hasUnparsedDefaultArg()) { |
| NewParm->setUnparsedDefaultArg(); |
| UnparsedDefaultArgInstantiations[OldParm].push_back(NewParm); |
| } else if (Expr *Arg = OldParm->getDefaultArg()) { |
| FunctionDecl *OwningFunc = cast<FunctionDecl>(OldParm->getDeclContext()); |
| if (OwningFunc->isLexicallyWithinFunctionOrMethod()) { |
| // Instantiate default arguments for methods of local classes (DR1484) |
| // and non-defining declarations. |
| Sema::ContextRAII SavedContext(*this, OwningFunc); |
| LocalInstantiationScope Local(*this, true); |
| ExprResult NewArg = SubstExpr(Arg, TemplateArgs); |
| if (NewArg.isUsable()) { |
| // It would be nice if we still had this. |
| SourceLocation EqualLoc = NewArg.get()->getLocStart(); |
| SetParamDefaultArgument(NewParm, NewArg.get(), EqualLoc); |
| } |
| } else { |
| // FIXME: if we non-lazily instantiated non-dependent default args for |
| // non-dependent parameter types we could remove a bunch of duplicate |
| // conversion warnings for such arguments. |
| NewParm->setUninstantiatedDefaultArg(Arg); |
| } |
| } |
| |
| NewParm->setHasInheritedDefaultArg(OldParm->hasInheritedDefaultArg()); |
| |
| if (OldParm->isParameterPack() && !NewParm->isParameterPack()) { |
| // Add the new parameter to the instantiated parameter pack. |
| CurrentInstantiationScope->InstantiatedLocalPackArg(OldParm, NewParm); |
| } else { |
| // Introduce an Old -> New mapping |
| CurrentInstantiationScope->InstantiatedLocal(OldParm, NewParm); |
| } |
| |
| // FIXME: OldParm may come from a FunctionProtoType, in which case CurContext |
| // can be anything, is this right ? |
| NewParm->setDeclContext(CurContext); |
| |
| NewParm->setScopeInfo(OldParm->getFunctionScopeDepth(), |
| OldParm->getFunctionScopeIndex() + indexAdjustment); |
| |
| InstantiateAttrs(TemplateArgs, OldParm, NewParm); |
| |
| return NewParm; |
| } |
| |
| /// Substitute the given template arguments into the given set of |
| /// parameters, producing the set of parameter types that would be generated |
| /// from such a substitution. |
| bool Sema::SubstParmTypes( |
| SourceLocation Loc, ArrayRef<ParmVarDecl *> Params, |
| const FunctionProtoType::ExtParameterInfo *ExtParamInfos, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| SmallVectorImpl<QualType> &ParamTypes, |
| SmallVectorImpl<ParmVarDecl *> *OutParams, |
| ExtParameterInfoBuilder &ParamInfos) { |
| assert(!CodeSynthesisContexts.empty() && |
| "Cannot perform an instantiation without some context on the " |
| "instantiation stack"); |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, Loc, |
| DeclarationName()); |
| return Instantiator.TransformFunctionTypeParams( |
| Loc, Params, nullptr, ExtParamInfos, ParamTypes, OutParams, ParamInfos); |
| } |
| |
| /// Perform substitution on the base class specifiers of the |
| /// given class template specialization. |
| /// |
| /// Produces a diagnostic and returns true on error, returns false and |
| /// attaches the instantiated base classes to the class template |
| /// specialization if successful. |
| bool |
| Sema::SubstBaseSpecifiers(CXXRecordDecl *Instantiation, |
| CXXRecordDecl *Pattern, |
| const MultiLevelTemplateArgumentList &TemplateArgs) { |
| bool Invalid = false; |
| SmallVector<CXXBaseSpecifier*, 4> InstantiatedBases; |
| for (const auto &Base : Pattern->bases()) { |
| if (!Base.getType()->isDependentType()) { |
| if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl()) { |
| if (RD->isInvalidDecl()) |
| Instantiation->setInvalidDecl(); |
| } |
| InstantiatedBases.push_back(new (Context) CXXBaseSpecifier(Base)); |
| continue; |
| } |
| |
| SourceLocation EllipsisLoc; |
| TypeSourceInfo *BaseTypeLoc; |
| if (Base.isPackExpansion()) { |
| // This is a pack expansion. See whether we should expand it now, or |
| // wait until later. |
| SmallVector<UnexpandedParameterPack, 2> Unexpanded; |
| collectUnexpandedParameterPacks(Base.getTypeSourceInfo()->getTypeLoc(), |
| Unexpanded); |
| bool ShouldExpand = false; |
| bool RetainExpansion = false; |
| Optional<unsigned> NumExpansions; |
| if (CheckParameterPacksForExpansion(Base.getEllipsisLoc(), |
| Base.getSourceRange(), |
| Unexpanded, |
| TemplateArgs, ShouldExpand, |
| RetainExpansion, |
| NumExpansions)) { |
| Invalid = true; |
| continue; |
| } |
| |
| // If we should expand this pack expansion now, do so. |
| if (ShouldExpand) { |
| for (unsigned I = 0; I != *NumExpansions; ++I) { |
| Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I); |
| |
| TypeSourceInfo *BaseTypeLoc = SubstType(Base.getTypeSourceInfo(), |
| TemplateArgs, |
| Base.getSourceRange().getBegin(), |
| DeclarationName()); |
| if (!BaseTypeLoc) { |
| Invalid = true; |
| continue; |
| } |
| |
| if (CXXBaseSpecifier *InstantiatedBase |
| = CheckBaseSpecifier(Instantiation, |
| Base.getSourceRange(), |
| Base.isVirtual(), |
| Base.getAccessSpecifierAsWritten(), |
| BaseTypeLoc, |
| SourceLocation())) |
| InstantiatedBases.push_back(InstantiatedBase); |
| else |
| Invalid = true; |
| } |
| |
| continue; |
| } |
| |
| // The resulting base specifier will (still) be a pack expansion. |
| EllipsisLoc = Base.getEllipsisLoc(); |
| Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, -1); |
| BaseTypeLoc = SubstType(Base.getTypeSourceInfo(), |
| TemplateArgs, |
| Base.getSourceRange().getBegin(), |
| DeclarationName()); |
| } else { |
| BaseTypeLoc = SubstType(Base.getTypeSourceInfo(), |
| TemplateArgs, |
| Base.getSourceRange().getBegin(), |
| DeclarationName()); |
| } |
| |
| if (!BaseTypeLoc) { |
| Invalid = true; |
| continue; |
| } |
| |
| if (CXXBaseSpecifier *InstantiatedBase |
| = CheckBaseSpecifier(Instantiation, |
| Base.getSourceRange(), |
| Base.isVirtual(), |
| Base.getAccessSpecifierAsWritten(), |
| BaseTypeLoc, |
| EllipsisLoc)) |
| InstantiatedBases.push_back(InstantiatedBase); |
| else |
| Invalid = true; |
| } |
| |
| if (!Invalid && AttachBaseSpecifiers(Instantiation, InstantiatedBases)) |
| Invalid = true; |
| |
| return Invalid; |
| } |
| |
| // Defined via #include from SemaTemplateInstantiateDecl.cpp |
| namespace clang { |
| namespace sema { |
| Attr *instantiateTemplateAttribute(const Attr *At, ASTContext &C, Sema &S, |
| const MultiLevelTemplateArgumentList &TemplateArgs); |
| Attr *instantiateTemplateAttributeForDecl( |
| const Attr *At, ASTContext &C, Sema &S, |
| const MultiLevelTemplateArgumentList &TemplateArgs); |
| } |
| } |
| |
| /// Instantiate the definition of a class from a given pattern. |
| /// |
| /// \param PointOfInstantiation The point of instantiation within the |
| /// source code. |
| /// |
| /// \param Instantiation is the declaration whose definition is being |
| /// instantiated. This will be either a class template specialization |
| /// or a member class of a class template specialization. |
| /// |
| /// \param Pattern is the pattern from which the instantiation |
| /// occurs. This will be either the declaration of a class template or |
| /// the declaration of a member class of a class template. |
| /// |
| /// \param TemplateArgs The template arguments to be substituted into |
| /// the pattern. |
| /// |
| /// \param TSK the kind of implicit or explicit instantiation to perform. |
| /// |
| /// \param Complain whether to complain if the class cannot be instantiated due |
| /// to the lack of a definition. |
| /// |
| /// \returns true if an error occurred, false otherwise. |
| bool |
| Sema::InstantiateClass(SourceLocation PointOfInstantiation, |
| CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| TemplateSpecializationKind TSK, |
| bool Complain) { |
| CXXRecordDecl *PatternDef |
| = cast_or_null<CXXRecordDecl>(Pattern->getDefinition()); |
| if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation, |
| Instantiation->getInstantiatedFromMemberClass(), |
| Pattern, PatternDef, TSK, Complain)) |
| return true; |
| Pattern = PatternDef; |
| |
| // Record the point of instantiation. |
| if (MemberSpecializationInfo *MSInfo |
| = Instantiation->getMemberSpecializationInfo()) { |
| MSInfo->setTemplateSpecializationKind(TSK); |
| MSInfo->setPointOfInstantiation(PointOfInstantiation); |
| } else if (ClassTemplateSpecializationDecl *Spec |
| = dyn_cast<ClassTemplateSpecializationDecl>(Instantiation)) { |
| Spec->setTemplateSpecializationKind(TSK); |
| Spec->setPointOfInstantiation(PointOfInstantiation); |
| } |
| |
| InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation); |
| if (Inst.isInvalid()) |
| return true; |
| assert(!Inst.isAlreadyInstantiating() && "should have been caught by caller"); |
| PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(), |
| "instantiating class definition"); |
| |
| // Enter the scope of this instantiation. We don't use |
| // PushDeclContext because we don't have a scope. |
| ContextRAII SavedContext(*this, Instantiation); |
| EnterExpressionEvaluationContext EvalContext( |
| *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| |
| // If this is an instantiation of a local class, merge this local |
| // instantiation scope with the enclosing scope. Otherwise, every |
| // instantiation of a class has its own local instantiation scope. |
| bool MergeWithParentScope = !Instantiation->isDefinedOutsideFunctionOrMethod(); |
| LocalInstantiationScope Scope(*this, MergeWithParentScope); |
| |
| // Some class state isn't processed immediately but delayed till class |
| // instantiation completes. We may not be ready to handle any delayed state |
| // already on the stack as it might correspond to a different class, so save |
| // it now and put it back later. |
| SavePendingParsedClassStateRAII SavedPendingParsedClassState(*this); |
| |
| // Pull attributes from the pattern onto the instantiation. |
| InstantiateAttrs(TemplateArgs, Pattern, Instantiation); |
| |
| // Start the definition of this instantiation. |
| Instantiation->startDefinition(); |
| |
| // The instantiation is visible here, even if it was first declared in an |
| // unimported module. |
| Instantiation->setVisibleDespiteOwningModule(); |
| |
| // FIXME: This loses the as-written tag kind for an explicit instantiation. |
| Instantiation->setTagKind(Pattern->getTagKind()); |
| |
| // Do substitution on the base class specifiers. |
| if (SubstBaseSpecifiers(Instantiation, Pattern, TemplateArgs)) |
| Instantiation->setInvalidDecl(); |
| |
| TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs); |
| SmallVector<Decl*, 4> Fields; |
| // Delay instantiation of late parsed attributes. |
| LateInstantiatedAttrVec LateAttrs; |
| Instantiator.enableLateAttributeInstantiation(&LateAttrs); |
| |
| for (auto *Member : Pattern->decls()) { |
| // Don't instantiate members not belonging in this semantic context. |
| // e.g. for: |
| // @code |
| // template <int i> class A { |
| // class B *g; |
| // }; |
| // @endcode |
| // 'class B' has the template as lexical context but semantically it is |
| // introduced in namespace scope. |
| if (Member->getDeclContext() != Pattern) |
| continue; |
| |
| // BlockDecls can appear in a default-member-initializer. They must be the |
| // child of a BlockExpr, so we only know how to instantiate them from there. |
| if (isa<BlockDecl>(Member)) |
| continue; |
| |
| if (Member->isInvalidDecl()) { |
| Instantiation->setInvalidDecl(); |
| continue; |
| } |
| |
| Decl *NewMember = Instantiator.Visit(Member); |
| if (NewMember) { |
| if (FieldDecl *Field = dyn_cast<FieldDecl>(NewMember)) { |
| Fields.push_back(Field); |
| } else if (EnumDecl *Enum = dyn_cast<EnumDecl>(NewMember)) { |
| // C++11 [temp.inst]p1: The implicit instantiation of a class template |
| // specialization causes the implicit instantiation of the definitions |
| // of unscoped member enumerations. |
| // Record a point of instantiation for this implicit instantiation. |
| if (TSK == TSK_ImplicitInstantiation && !Enum->isScoped() && |
| Enum->isCompleteDefinition()) { |
| MemberSpecializationInfo *MSInfo =Enum->getMemberSpecializationInfo(); |
| assert(MSInfo && "no spec info for member enum specialization"); |
| MSInfo->setTemplateSpecializationKind(TSK_ImplicitInstantiation); |
| MSInfo->setPointOfInstantiation(PointOfInstantiation); |
| } |
| } else if (StaticAssertDecl *SA = dyn_cast<StaticAssertDecl>(NewMember)) { |
| if (SA->isFailed()) { |
| // A static_assert failed. Bail out; instantiating this |
| // class is probably not meaningful. |
| Instantiation->setInvalidDecl(); |
| break; |
| } |
| } |
| |
| if (NewMember->isInvalidDecl()) |
| Instantiation->setInvalidDecl(); |
| } else { |
| // FIXME: Eventually, a NULL return will mean that one of the |
| // instantiations was a semantic disaster, and we'll want to mark the |
| // declaration invalid. |
| // For now, we expect to skip some members that we can't yet handle. |
| } |
| } |
| |
| // Finish checking fields. |
| ActOnFields(nullptr, Instantiation->getLocation(), Instantiation, Fields, |
| SourceLocation(), SourceLocation(), ParsedAttributesView()); |
| CheckCompletedCXXClass(Instantiation); |
| |
| // Default arguments are parsed, if not instantiated. We can go instantiate |
| // default arg exprs for default constructors if necessary now. |
| ActOnFinishCXXNonNestedClass(Instantiation); |
| |
| // Instantiate late parsed attributes, and attach them to their decls. |
| // See Sema::InstantiateAttrs |
| for (LateInstantiatedAttrVec::iterator I = LateAttrs.begin(), |
| E = LateAttrs.end(); I != E; ++I) { |
| assert(CurrentInstantiationScope == Instantiator.getStartingScope()); |
| CurrentInstantiationScope = I->Scope; |
| |
| // Allow 'this' within late-parsed attributes. |
| NamedDecl *ND = dyn_cast<NamedDecl>(I->NewDecl); |
| CXXRecordDecl *ThisContext = |
| dyn_cast_or_null<CXXRecordDecl>(ND->getDeclContext()); |
| CXXThisScopeRAII ThisScope(*this, ThisContext, /*TypeQuals*/0, |
| ND && ND->isCXXInstanceMember()); |
| |
| Attr *NewAttr = |
| instantiateTemplateAttribute(I->TmplAttr, Context, *this, TemplateArgs); |
| I->NewDecl->addAttr(NewAttr); |
| LocalInstantiationScope::deleteScopes(I->Scope, |
| Instantiator.getStartingScope()); |
| } |
| Instantiator.disableLateAttributeInstantiation(); |
| LateAttrs.clear(); |
| |
| ActOnFinishDelayedMemberInitializers(Instantiation); |
| |
| // FIXME: We should do something similar for explicit instantiations so they |
| // end up in the right module. |
| if (TSK == TSK_ImplicitInstantiation) { |
| Instantiation->setLocation(Pattern->getLocation()); |
| Instantiation->setLocStart(Pattern->getInnerLocStart()); |
| Instantiation->setBraceRange(Pattern->getBraceRange()); |
| } |
| |
| if (!Instantiation->isInvalidDecl()) { |
| // Perform any dependent diagnostics from the pattern. |
| PerformDependentDiagnostics(Pattern, TemplateArgs); |
| |
| // Instantiate any out-of-line class template partial |
| // specializations now. |
| for (TemplateDeclInstantiator::delayed_partial_spec_iterator |
| P = Instantiator.delayed_partial_spec_begin(), |
| PEnd = Instantiator.delayed_partial_spec_end(); |
| P != PEnd; ++P) { |
| if (!Instantiator.InstantiateClassTemplatePartialSpecialization( |
| P->first, P->second)) { |
| Instantiation->setInvalidDecl(); |
| break; |
| } |
| } |
| |
| // Instantiate any out-of-line variable template partial |
| // specializations now. |
| for (TemplateDeclInstantiator::delayed_var_partial_spec_iterator |
| P = Instantiator.delayed_var_partial_spec_begin(), |
| PEnd = Instantiator.delayed_var_partial_spec_end(); |
| P != PEnd; ++P) { |
| if (!Instantiator.InstantiateVarTemplatePartialSpecialization( |
| P->first, P->second)) { |
| Instantiation->setInvalidDecl(); |
| break; |
| } |
| } |
| } |
| |
| // Exit the scope of this instantiation. |
| SavedContext.pop(); |
| |
| if (!Instantiation->isInvalidDecl()) { |
| Consumer.HandleTagDeclDefinition(Instantiation); |
| |
| // Always emit the vtable for an explicit instantiation definition |
| // of a polymorphic class template specialization. |
| if (TSK == TSK_ExplicitInstantiationDefinition) |
| MarkVTableUsed(PointOfInstantiation, Instantiation, true); |
| } |
| |
| return Instantiation->isInvalidDecl(); |
| } |
| |
| /// Instantiate the definition of an enum from a given pattern. |
| /// |
| /// \param PointOfInstantiation The point of instantiation within the |
| /// source code. |
| /// \param Instantiation is the declaration whose definition is being |
| /// instantiated. This will be a member enumeration of a class |
| /// temploid specialization, or a local enumeration within a |
| /// function temploid specialization. |
| /// \param Pattern The templated declaration from which the instantiation |
| /// occurs. |
| /// \param TemplateArgs The template arguments to be substituted into |
| /// the pattern. |
| /// \param TSK The kind of implicit or explicit instantiation to perform. |
| /// |
| /// \return \c true if an error occurred, \c false otherwise. |
| bool Sema::InstantiateEnum(SourceLocation PointOfInstantiation, |
| EnumDecl *Instantiation, EnumDecl *Pattern, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| TemplateSpecializationKind TSK) { |
| EnumDecl *PatternDef = Pattern->getDefinition(); |
| if (DiagnoseUninstantiableTemplate(PointOfInstantiation, Instantiation, |
| Instantiation->getInstantiatedFromMemberEnum(), |
| Pattern, PatternDef, TSK,/*Complain*/true)) |
| return true; |
| Pattern = PatternDef; |
| |
| // Record the point of instantiation. |
| if (MemberSpecializationInfo *MSInfo |
| = Instantiation->getMemberSpecializationInfo()) { |
| MSInfo->setTemplateSpecializationKind(TSK); |
| MSInfo->setPointOfInstantiation(PointOfInstantiation); |
| } |
| |
| InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation); |
| if (Inst.isInvalid()) |
| return true; |
| if (Inst.isAlreadyInstantiating()) |
| return false; |
| PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(), |
| "instantiating enum definition"); |
| |
| // The instantiation is visible here, even if it was first declared in an |
| // unimported module. |
| Instantiation->setVisibleDespiteOwningModule(); |
| |
| // Enter the scope of this instantiation. We don't use |
| // PushDeclContext because we don't have a scope. |
| ContextRAII SavedContext(*this, Instantiation); |
| EnterExpressionEvaluationContext EvalContext( |
| *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| |
| LocalInstantiationScope Scope(*this, /*MergeWithParentScope*/true); |
| |
| // Pull attributes from the pattern onto the instantiation. |
| InstantiateAttrs(TemplateArgs, Pattern, Instantiation); |
| |
| TemplateDeclInstantiator Instantiator(*this, Instantiation, TemplateArgs); |
| Instantiator.InstantiateEnumDefinition(Instantiation, Pattern); |
| |
| // Exit the scope of this instantiation. |
| SavedContext.pop(); |
| |
| return Instantiation->isInvalidDecl(); |
| } |
| |
| |
| /// Instantiate the definition of a field from the given pattern. |
| /// |
| /// \param PointOfInstantiation The point of instantiation within the |
| /// source code. |
| /// \param Instantiation is the declaration whose definition is being |
| /// instantiated. This will be a class of a class temploid |
| /// specialization, or a local enumeration within a function temploid |
| /// specialization. |
| /// \param Pattern The templated declaration from which the instantiation |
| /// occurs. |
| /// \param TemplateArgs The template arguments to be substituted into |
| /// the pattern. |
| /// |
| /// \return \c true if an error occurred, \c false otherwise. |
| bool Sema::InstantiateInClassInitializer( |
| SourceLocation PointOfInstantiation, FieldDecl *Instantiation, |
| FieldDecl *Pattern, const MultiLevelTemplateArgumentList &TemplateArgs) { |
| // If there is no initializer, we don't need to do anything. |
| if (!Pattern->hasInClassInitializer()) |
| return false; |
| |
| assert(Instantiation->getInClassInitStyle() == |
| Pattern->getInClassInitStyle() && |
| "pattern and instantiation disagree about init style"); |
| |
| // Error out if we haven't parsed the initializer of the pattern yet because |
| // we are waiting for the closing brace of the outer class. |
| Expr *OldInit = Pattern->getInClassInitializer(); |
| if (!OldInit) { |
| RecordDecl *PatternRD = Pattern->getParent(); |
| RecordDecl *OutermostClass = PatternRD->getOuterLexicalRecordContext(); |
| Diag(PointOfInstantiation, |
| diag::err_in_class_initializer_not_yet_parsed) |
| << OutermostClass << Pattern; |
| Diag(Pattern->getLocEnd(), diag::note_in_class_initializer_not_yet_parsed); |
| Instantiation->setInvalidDecl(); |
| return true; |
| } |
| |
| InstantiatingTemplate Inst(*this, PointOfInstantiation, Instantiation); |
| if (Inst.isInvalid()) |
| return true; |
| if (Inst.isAlreadyInstantiating()) { |
| // Error out if we hit an instantiation cycle for this initializer. |
| Diag(PointOfInstantiation, diag::err_in_class_initializer_cycle) |
| << Instantiation; |
| return true; |
| } |
| PrettyDeclStackTraceEntry CrashInfo(Context, Instantiation, SourceLocation(), |
| "instantiating default member init"); |
| |
| // Enter the scope of this instantiation. We don't use PushDeclContext because |
| // we don't have a scope. |
| ContextRAII SavedContext(*this, Instantiation->getParent()); |
| EnterExpressionEvaluationContext EvalContext( |
| *this, Sema::ExpressionEvaluationContext::PotentiallyEvaluated); |
| |
| LocalInstantiationScope Scope(*this, true); |
| |
| // Instantiate the initializer. |
| ActOnStartCXXInClassMemberInitializer(); |
| CXXThisScopeRAII ThisScope(*this, Instantiation->getParent(), /*TypeQuals=*/0); |
| |
| ExprResult NewInit = SubstInitializer(OldInit, TemplateArgs, |
| /*CXXDirectInit=*/false); |
| Expr *Init = NewInit.get(); |
| assert((!Init || !isa<ParenListExpr>(Init)) && "call-style init in class"); |
| ActOnFinishCXXInClassMemberInitializer( |
| Instantiation, Init ? Init->getLocStart() : SourceLocation(), Init); |
| |
| if (auto *L = getASTMutationListener()) |
| L->DefaultMemberInitializerInstantiated(Instantiation); |
| |
| // Return true if the in-class initializer is still missing. |
| return !Instantiation->getInClassInitializer(); |
| } |
| |
| namespace { |
| /// A partial specialization whose template arguments have matched |
| /// a given template-id. |
| struct PartialSpecMatchResult { |
| ClassTemplatePartialSpecializationDecl *Partial; |
| TemplateArgumentList *Args; |
| }; |
| } |
| |
| bool Sema::usesPartialOrExplicitSpecialization( |
| SourceLocation Loc, ClassTemplateSpecializationDecl *ClassTemplateSpec) { |
| if (ClassTemplateSpec->getTemplateSpecializationKind() == |
| TSK_ExplicitSpecialization) |
| return true; |
| |
| SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
| ClassTemplateSpec->getSpecializedTemplate() |
| ->getPartialSpecializations(PartialSpecs); |
| for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) { |
| TemplateDeductionInfo Info(Loc); |
| if (!DeduceTemplateArguments(PartialSpecs[I], |
| ClassTemplateSpec->getTemplateArgs(), Info)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /// Get the instantiation pattern to use to instantiate the definition of a |
| /// given ClassTemplateSpecializationDecl (either the pattern of the primary |
| /// template or of a partial specialization). |
| static CXXRecordDecl * |
| getPatternForClassTemplateSpecialization( |
| Sema &S, SourceLocation PointOfInstantiation, |
| ClassTemplateSpecializationDecl *ClassTemplateSpec, |
| TemplateSpecializationKind TSK, bool Complain) { |
| Sema::InstantiatingTemplate Inst(S, PointOfInstantiation, ClassTemplateSpec); |
| if (Inst.isInvalid() || Inst.isAlreadyInstantiating()) |
| return nullptr; |
| |
| llvm::PointerUnion<ClassTemplateDecl *, |
| ClassTemplatePartialSpecializationDecl *> |
| Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial(); |
| if (!Specialized.is<ClassTemplatePartialSpecializationDecl *>()) { |
| // Find best matching specialization. |
| ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate(); |
| |
| // C++ [temp.class.spec.match]p1: |
| // When a class template is used in a context that requires an |
| // instantiation of the class, it is necessary to determine |
| // whether the instantiation is to be generated using the primary |
| // template or one of the partial specializations. This is done by |
| // matching the template arguments of the class template |
| // specialization with the template argument lists of the partial |
| // specializations. |
| typedef PartialSpecMatchResult MatchResult; |
| SmallVector<MatchResult, 4> Matched; |
| SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs; |
| Template->getPartialSpecializations(PartialSpecs); |
| TemplateSpecCandidateSet FailedCandidates(PointOfInstantiation); |
| for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I) { |
| ClassTemplatePartialSpecializationDecl *Partial = PartialSpecs[I]; |
| TemplateDeductionInfo Info(FailedCandidates.getLocation()); |
| if (Sema::TemplateDeductionResult Result = S.DeduceTemplateArguments( |
| Partial, ClassTemplateSpec->getTemplateArgs(), Info)) { |
| // Store the failed-deduction information for use in diagnostics, later. |
| // TODO: Actually use the failed-deduction info? |
| FailedCandidates.addCandidate().set( |
| DeclAccessPair::make(Template, AS_public), Partial, |
| MakeDeductionFailureInfo(S.Context, Result, Info)); |
| (void)Result; |
| } else { |
| Matched.push_back(PartialSpecMatchResult()); |
| Matched.back().Partial = Partial; |
| Matched.back().Args = Info.take(); |
| } |
| } |
| |
| // If we're dealing with a member template where the template parameters |
| // have been instantiated, this provides the original template parameters |
| // from which the member template's parameters were instantiated. |
| |
| if (Matched.size() >= 1) { |
| SmallVectorImpl<MatchResult>::iterator Best = Matched.begin(); |
| if (Matched.size() == 1) { |
| // -- If exactly one matching specialization is found, the |
| // instantiation is generated from that specialization. |
| // We don't need to do anything for this. |
| } else { |
| // -- If more than one matching specialization is found, the |
| // partial order rules (14.5.4.2) are used to determine |
| // whether one of the specializations is more specialized |
| // than the others. If none of the specializations is more |
| // specialized than all of the other matching |
| // specializations, then the use of the class template is |
| // ambiguous and the program is ill-formed. |
| for (SmallVectorImpl<MatchResult>::iterator P = Best + 1, |
| PEnd = Matched.end(); |
| P != PEnd; ++P) { |
| if (S.getMoreSpecializedPartialSpecialization( |
| P->Partial, Best->Partial, PointOfInstantiation) == |
| P->Partial) |
| Best = P; |
| } |
| |
| // Determine if the best partial specialization is more specialized than |
| // the others. |
| bool Ambiguous = false; |
| for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(), |
| PEnd = Matched.end(); |
| P != PEnd; ++P) { |
| if (P != Best && S.getMoreSpecializedPartialSpecialization( |
| P->Partial, Best->Partial, |
| PointOfInstantiation) != Best->Partial) { |
| Ambiguous = true; |
| break; |
| } |
| } |
| |
| if (Ambiguous) { |
| // Partial ordering did not produce a clear winner. Complain. |
| Inst.Clear(); |
| ClassTemplateSpec->setInvalidDecl(); |
| S.Diag(PointOfInstantiation, |
| diag::err_partial_spec_ordering_ambiguous) |
| << ClassTemplateSpec; |
| |
| // Print the matching partial specializations. |
| for (SmallVectorImpl<MatchResult>::iterator P = Matched.begin(), |
| PEnd = Matched.end(); |
| P != PEnd; ++P) |
| S.Diag(P->Partial->getLocation(), diag::note_partial_spec_match) |
| << S.getTemplateArgumentBindingsText( |
| P->Partial->getTemplateParameters(), *P->Args); |
| |
| return nullptr; |
| } |
| } |
| |
| ClassTemplateSpec->setInstantiationOf(Best->Partial, Best->Args); |
| } else { |
| // -- If no matches are found, the instantiation is generated |
| // from the primary template. |
| } |
| } |
| |
| CXXRecordDecl *Pattern = nullptr; |
| Specialized = ClassTemplateSpec->getSpecializedTemplateOrPartial(); |
| if (auto *PartialSpec = |
| Specialized.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) { |
| // Instantiate using the best class template partial specialization. |
| while (PartialSpec->getInstantiatedFromMember()) { |
| // If we've found an explicit specialization of this class template, |
| // stop here and use that as the pattern. |
| if (PartialSpec->isMemberSpecialization()) |
| break; |
| |
| PartialSpec = PartialSpec->getInstantiatedFromMember(); |
| } |
| Pattern = PartialSpec; |
| } else { |
| ClassTemplateDecl *Template = ClassTemplateSpec->getSpecializedTemplate(); |
| while (Template->getInstantiatedFromMemberTemplate()) { |
| // If we've found an explicit specialization of this class template, |
| // stop here and use that as the pattern. |
| if (Template->isMemberSpecialization()) |
| break; |
| |
| Template = Template->getInstantiatedFromMemberTemplate(); |
| } |
| Pattern = Template->getTemplatedDecl(); |
| } |
| |
| return Pattern; |
| } |
| |
| bool Sema::InstantiateClassTemplateSpecialization( |
| SourceLocation PointOfInstantiation, |
| ClassTemplateSpecializationDecl *ClassTemplateSpec, |
| TemplateSpecializationKind TSK, bool Complain) { |
| // Perform the actual instantiation on the canonical declaration. |
| ClassTemplateSpec = cast<ClassTemplateSpecializationDecl>( |
| ClassTemplateSpec->getCanonicalDecl()); |
| if (ClassTemplateSpec->isInvalidDecl()) |
| return true; |
| |
| CXXRecordDecl *Pattern = getPatternForClassTemplateSpecialization( |
| *this, PointOfInstantiation, ClassTemplateSpec, TSK, Complain); |
| if (!Pattern) |
| return true; |
| |
| return InstantiateClass(PointOfInstantiation, ClassTemplateSpec, Pattern, |
| getTemplateInstantiationArgs(ClassTemplateSpec), TSK, |
| Complain); |
| } |
| |
| /// Instantiates the definitions of all of the member |
| /// of the given class, which is an instantiation of a class template |
| /// or a member class of a template. |
| void |
| Sema::InstantiateClassMembers(SourceLocation PointOfInstantiation, |
| CXXRecordDecl *Instantiation, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| TemplateSpecializationKind TSK) { |
| // FIXME: We need to notify the ASTMutationListener that we did all of these |
| // things, in case we have an explicit instantiation definition in a PCM, a |
| // module, or preamble, and the declaration is in an imported AST. |
| assert( |
| (TSK == TSK_ExplicitInstantiationDefinition || |
| TSK == TSK_ExplicitInstantiationDeclaration || |
| (TSK == TSK_ImplicitInstantiation && Instantiation->isLocalClass())) && |
| "Unexpected template specialization kind!"); |
| for (auto *D : Instantiation->decls()) { |
| bool SuppressNew = false; |
| if (auto *Function = dyn_cast<FunctionDecl>(D)) { |
| if (FunctionDecl *Pattern |
| = Function->getInstantiatedFromMemberFunction()) { |
| MemberSpecializationInfo *MSInfo |
| = Function->getMemberSpecializationInfo(); |
| assert(MSInfo && "No member specialization information?"); |
| if (MSInfo->getTemplateSpecializationKind() |
| == TSK_ExplicitSpecialization) |
| continue; |
| |
| if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK, |
| Function, |
| MSInfo->getTemplateSpecializationKind(), |
| MSInfo->getPointOfInstantiation(), |
| SuppressNew) || |
| SuppressNew) |
| continue; |
| |
| // C++11 [temp.explicit]p8: |
| // An explicit instantiation definition that names a class template |
| // specialization explicitly instantiates the class template |
| // specialization and is only an explicit instantiation definition |
| // of members whose definition is visible at the point of |
| // instantiation. |
| if (TSK == TSK_ExplicitInstantiationDefinition && !Pattern->isDefined()) |
| continue; |
| |
| Function->setTemplateSpecializationKind(TSK, PointOfInstantiation); |
| |
| if (Function->isDefined()) { |
| // Let the ASTConsumer know that this function has been explicitly |
| // instantiated now, and its linkage might have changed. |
| Consumer.HandleTopLevelDecl(DeclGroupRef(Function)); |
| } else if (TSK == TSK_ExplicitInstantiationDefinition) { |
| InstantiateFunctionDefinition(PointOfInstantiation, Function); |
| } else if (TSK == TSK_ImplicitInstantiation) { |
| PendingLocalImplicitInstantiations.push_back( |
| std::make_pair(Function, PointOfInstantiation)); |
| } |
| } |
| } else if (auto *Var = dyn_cast<VarDecl>(D)) { |
| if (isa<VarTemplateSpecializationDecl>(Var)) |
| continue; |
| |
| if (Var->isStaticDataMember()) { |
| MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo(); |
| assert(MSInfo && "No member specialization information?"); |
| if (MSInfo->getTemplateSpecializationKind() |
| == TSK_ExplicitSpecialization) |
| continue; |
| |
| if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK, |
| Var, |
| MSInfo->getTemplateSpecializationKind(), |
| MSInfo->getPointOfInstantiation(), |
| SuppressNew) || |
| SuppressNew) |
| continue; |
| |
| if (TSK == TSK_ExplicitInstantiationDefinition) { |
| // C++0x [temp.explicit]p8: |
| // An explicit instantiation definition that names a class template |
| // specialization explicitly instantiates the class template |
| // specialization and is only an explicit instantiation definition |
| // of members whose definition is visible at the point of |
| // instantiation. |
| if (!Var->getInstantiatedFromStaticDataMember()->getDefinition()) |
| continue; |
| |
| Var->setTemplateSpecializationKind(TSK, PointOfInstantiation); |
| InstantiateVariableDefinition(PointOfInstantiation, Var); |
| } else { |
| Var->setTemplateSpecializationKind(TSK, PointOfInstantiation); |
| } |
| } |
| } else if (auto *Record = dyn_cast<CXXRecordDecl>(D)) { |
| // Always skip the injected-class-name, along with any |
| // redeclarations of nested classes, since both would cause us |
| // to try to instantiate the members of a class twice. |
| // Skip closure types; they'll get instantiated when we instantiate |
| // the corresponding lambda-expression. |
| if (Record->isInjectedClassName() || Record->getPreviousDecl() || |
| Record->isLambda()) |
| continue; |
| |
| MemberSpecializationInfo *MSInfo = Record->getMemberSpecializationInfo(); |
| assert(MSInfo && "No member specialization information?"); |
| |
| if (MSInfo->getTemplateSpecializationKind() |
| == TSK_ExplicitSpecialization) |
| continue; |
| |
| if ((Context.getTargetInfo().getCXXABI().isMicrosoft() || |
| Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment()) && |
| TSK == TSK_ExplicitInstantiationDeclaration) { |
| // In MSVC and Windows Itanium mode, explicit instantiation decl of the |
| // outer class doesn't affect the inner class. |
| continue; |
| } |
| |
| if (CheckSpecializationInstantiationRedecl(PointOfInstantiation, TSK, |
| Record, |
| MSInfo->getTemplateSpecializationKind(), |
| MSInfo->getPointOfInstantiation(), |
| SuppressNew) || |
| SuppressNew) |
| continue; |
| |
| CXXRecordDecl *Pattern = Record->getInstantiatedFromMemberClass(); |
| assert(Pattern && "Missing instantiated-from-template information"); |
| |
| if (!Record->getDefinition()) { |
| if (!Pattern->getDefinition()) { |
| // C++0x [temp.explicit]p8: |
| // An explicit instantiation definition that names a class template |
| // specialization explicitly instantiates the class template |
| // specialization and is only an explicit instantiation definition |
| // of members whose definition is visible at the point of |
| // instantiation. |
| if (TSK == TSK_ExplicitInstantiationDeclaration) { |
| MSInfo->setTemplateSpecializationKind(TSK); |
| MSInfo->setPointOfInstantiation(PointOfInstantiation); |
| } |
| |
| continue; |
| } |
| |
| InstantiateClass(PointOfInstantiation, Record, Pattern, |
| TemplateArgs, |
| TSK); |
| } else { |
| if (TSK == TSK_ExplicitInstantiationDefinition && |
| Record->getTemplateSpecializationKind() == |
| TSK_ExplicitInstantiationDeclaration) { |
| Record->setTemplateSpecializationKind(TSK); |
| MarkVTableUsed(PointOfInstantiation, Record, true); |
| } |
| } |
| |
| Pattern = cast_or_null<CXXRecordDecl>(Record->getDefinition()); |
| if (Pattern) |
| InstantiateClassMembers(PointOfInstantiation, Pattern, TemplateArgs, |
| TSK); |
| } else if (auto *Enum = dyn_cast<EnumDecl>(D)) { |
| MemberSpecializationInfo *MSInfo = Enum->getMemberSpecializationInfo(); |
| assert(MSInfo && "No member specialization information?"); |
| |
| if (MSInfo->getTemplateSpecializationKind() |
| == TSK_ExplicitSpecialization) |
| continue; |
| |
| if (CheckSpecializationInstantiationRedecl( |
| PointOfInstantiation, TSK, Enum, |
| MSInfo->getTemplateSpecializationKind(), |
| MSInfo->getPointOfInstantiation(), SuppressNew) || |
| SuppressNew) |
| continue; |
| |
| if (Enum->getDefinition()) |
| continue; |
| |
| EnumDecl *Pattern = Enum->getTemplateInstantiationPattern(); |
| assert(Pattern && "Missing instantiated-from-template information"); |
| |
| if (TSK == TSK_ExplicitInstantiationDefinition) { |
| if (!Pattern->getDefinition()) |
| continue; |
| |
| InstantiateEnum(PointOfInstantiation, Enum, Pattern, TemplateArgs, TSK); |
| } else { |
| MSInfo->setTemplateSpecializationKind(TSK); |
| MSInfo->setPointOfInstantiation(PointOfInstantiation); |
| } |
| } else if (auto *Field = dyn_cast<FieldDecl>(D)) { |
| // No need to instantiate in-class initializers during explicit |
| // instantiation. |
| if (Field->hasInClassInitializer() && TSK == TSK_ImplicitInstantiation) { |
| CXXRecordDecl *ClassPattern = |
| Instantiation->getTemplateInstantiationPattern(); |
| DeclContext::lookup_result Lookup = |
| ClassPattern->lookup(Field->getDeclName()); |
| FieldDecl *Pattern = cast<FieldDecl>(Lookup.front()); |
| InstantiateInClassInitializer(PointOfInstantiation, Field, Pattern, |
| TemplateArgs); |
| } |
| } |
| } |
| } |
| |
| /// Instantiate the definitions of all of the members of the |
| /// given class template specialization, which was named as part of an |
| /// explicit instantiation. |
| void |
| Sema::InstantiateClassTemplateSpecializationMembers( |
| SourceLocation PointOfInstantiation, |
| ClassTemplateSpecializationDecl *ClassTemplateSpec, |
| TemplateSpecializationKind TSK) { |
| // C++0x [temp.explicit]p7: |
| // An explicit instantiation that names a class template |
| // specialization is an explicit instantion of the same kind |
| // (declaration or definition) of each of its members (not |
| // including members inherited from base classes) that has not |
| // been previously explicitly specialized in the translation unit |
| // containing the explicit instantiation, except as described |
| // below. |
| InstantiateClassMembers(PointOfInstantiation, ClassTemplateSpec, |
| getTemplateInstantiationArgs(ClassTemplateSpec), |
| TSK); |
| } |
| |
| StmtResult |
| Sema::SubstStmt(Stmt *S, const MultiLevelTemplateArgumentList &TemplateArgs) { |
| if (!S) |
| return S; |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, |
| SourceLocation(), |
| DeclarationName()); |
| return Instantiator.TransformStmt(S); |
| } |
| |
| ExprResult |
| Sema::SubstExpr(Expr *E, const MultiLevelTemplateArgumentList &TemplateArgs) { |
| if (!E) |
| return E; |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, |
| SourceLocation(), |
| DeclarationName()); |
| return Instantiator.TransformExpr(E); |
| } |
| |
| ExprResult Sema::SubstInitializer(Expr *Init, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| bool CXXDirectInit) { |
| TemplateInstantiator Instantiator(*this, TemplateArgs, |
| SourceLocation(), |
| DeclarationName()); |
| return Instantiator.TransformInitializer(Init, CXXDirectInit); |
| } |
| |
| bool Sema::SubstExprs(ArrayRef<Expr *> Exprs, bool IsCall, |
| const MultiLevelTemplateArgumentList &TemplateArgs, |
| SmallVectorImpl<Expr *> &Outputs) { |
| if (Exprs.empty()) |
| return false; |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, |
| SourceLocation(), |
| DeclarationName()); |
| return Instantiator.TransformExprs(Exprs.data(), Exprs.size(), |
| IsCall, Outputs); |
| } |
| |
| NestedNameSpecifierLoc |
| Sema::SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, |
| const MultiLevelTemplateArgumentList &TemplateArgs) { |
| if (!NNS) |
| return NestedNameSpecifierLoc(); |
| |
| TemplateInstantiator Instantiator(*this, TemplateArgs, NNS.getBeginLoc(), |
| DeclarationName()); |
| return Instantiator.TransformNestedNameSpecifierLoc(NNS); |
| } |
| |
| /// Do template substitution on declaration name info. |
| DeclarationNameInfo |
| Sema::SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, |
| const MultiLevelTemplateArgumentList &TemplateArgs) { |
| TemplateInstantiator Instantiator(*this, TemplateArgs, NameInfo.getLoc(), |
| NameInfo.getName()); |
| return Instantiator.TransformDeclarationNameInfo(NameInfo); |
| } |
| |
| TemplateName |
| Sema::SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, |
| TemplateName Name, SourceLocation Loc, |
| const MultiLevelTemplateArgumentList &TemplateArgs) { |
| TemplateInstantiator Instantiator(*this, TemplateArgs, Loc, |
| DeclarationName()); |
| CXXScopeSpec SS; |
| SS.Adopt(QualifierLoc); |
| return Instantiator.TransformTemplateName(SS, Name, Loc); |
| } |
| |
| bool Sema::Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, |
| TemplateArgumentListInfo &Result, |
| const MultiLevelTemplateArgumentList &TemplateArgs) { |
| TemplateInstantiator Instantiator(*this, TemplateArgs, SourceLocation(), |
| DeclarationName()); |
| |
| return Instantiator.TransformTemplateArguments(Args, NumArgs, Result); |
| } |
| |
| static const Decl *getCanonicalParmVarDecl(const Decl *D) { |
| // When storing ParmVarDecls in the local instantiation scope, we always |
| // want to use the ParmVarDecl from the canonical function declaration, |
| // since the map is then valid for any redeclaration or definition of that |
| // function. |
| if (const ParmVarDecl *PV = dyn_cast<ParmVarDecl>(D)) { |
| if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(PV->getDeclContext())) { |
| unsigned i = PV->getFunctionScopeIndex(); |
| // This parameter might be from a freestanding function type within the |
| // function and isn't necessarily referring to one of FD's parameters. |
| if (FD->getParamDecl(i) == PV) |
| return FD->getCanonicalDecl()->getParamDecl(i); |
| } |
| } |
| return D; |
| } |
| |
| |
| llvm::PointerUnion<Decl *, LocalInstantiationScope::DeclArgumentPack *> * |
| LocalInstantiationScope::findInstantiationOf(const Decl *D) { |
| D = getCanonicalParmVarDecl(D); |
| for (LocalInstantiationScope *Current = this; Current; |
| Current = Current->Outer) { |
| |
| // Check if we found something within this scope. |
| const Decl *CheckD = D; |
| do { |
| LocalDeclsMap::iterator Found = Current->LocalDecls.find(CheckD); |
| if (Found != Current->LocalDecls.end()) |
| return &Found->second; |
| |
| // If this is a tag declaration, it's possible that we need to look for |
| // a previous declaration. |
| if (const TagDecl *Tag = dyn_cast<TagDecl>(CheckD)) |
| CheckD = Tag->getPreviousDecl(); |
| else |
| CheckD = nullptr; |
| } while (CheckD); |
| |
| // If we aren't combined with our outer scope, we're done. |
| if (!Current->CombineWithOuterScope) |
| break; |
| } |
| |
| // If we're performing a partial substitution during template argument |
| // deduction, we may not have values for template parameters yet. |
| if (isa<NonTypeTemplateParmDecl>(D) || isa<TemplateTypeParmDecl>(D) || |
| isa<TemplateTemplateParmDecl>(D)) |
| return nullptr; |
| |
| // Local types referenced prior to definition may require instantiation. |
| if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) |
| if (RD->isLocalClass()) |
| return nullptr; |
| |
| // Enumeration types referenced prior to definition may appear as a result of |
| // error recovery. |
| if (isa<EnumDecl>(D)) |
| return nullptr; |
| |
| // If we didn't find the decl, then we either have a sema bug, or we have a |
| // forward reference to a label declaration. Return null to indicate that |
| // we have an uninstantiated label. |
| assert(isa<LabelDecl>(D) && "declaration not instantiated in this scope"); |
| return nullptr; |
| } |
| |
| void LocalInstantiationScope::InstantiatedLocal(const Decl *D, Decl *Inst) { |
| D = getCanonicalParmVarDecl(D); |
| llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D]; |
| if (Stored.isNull()) { |
| #ifndef NDEBUG |
| // It should not be present in any surrounding scope either. |
| LocalInstantiationScope *Current = this; |
| while (Current->CombineWithOuterScope && Current->Outer) { |
| Current = Current->Outer; |
| assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() && |
| "Instantiated local in inner and outer scopes"); |
| } |
| #endif |
| Stored = Inst; |
| } else if (DeclArgumentPack *Pack = Stored.dyn_cast<DeclArgumentPack *>()) { |
| Pack->push_back(cast<ParmVarDecl>(Inst)); |
| } else { |
| assert(Stored.get<Decl *>() == Inst && "Already instantiated this local"); |
| } |
| } |
| |
| void LocalInstantiationScope::InstantiatedLocalPackArg(const Decl *D, |
| ParmVarDecl *Inst) { |
| D = getCanonicalParmVarDecl(D); |
| DeclArgumentPack *Pack = LocalDecls[D].get<DeclArgumentPack *>(); |
| Pack->push_back(Inst); |
| } |
| |
| void LocalInstantiationScope::MakeInstantiatedLocalArgPack(const Decl *D) { |
| #ifndef NDEBUG |
| // This should be the first time we've been told about this decl. |
| for (LocalInstantiationScope *Current = this; |
| Current && Current->CombineWithOuterScope; Current = Current->Outer) |
| assert(Current->LocalDecls.find(D) == Current->LocalDecls.end() && |
| "Creating local pack after instantiation of local"); |
| #endif |
| |
| D = getCanonicalParmVarDecl(D); |
| llvm::PointerUnion<Decl *, DeclArgumentPack *> &Stored = LocalDecls[D]; |
| DeclArgumentPack *Pack = new DeclArgumentPack; |
| Stored = Pack; |
| ArgumentPacks.push_back(Pack); |
| } |
| |
| void LocalInstantiationScope::SetPartiallySubstitutedPack(NamedDecl *Pack, |
| const TemplateArgument *ExplicitArgs, |
| unsigned NumExplicitArgs) { |
| assert((!PartiallySubstitutedPack || PartiallySubstitutedPack == Pack) && |
| "Already have a partially-substituted pack"); |
| assert((!PartiallySubstitutedPack |
| || NumArgsInPartiallySubstitutedPack == NumExplicitArgs) && |
| "Wrong number of arguments in partially-substituted pack"); |
| PartiallySubstitutedPack = Pack; |
| ArgsInPartiallySubstitutedPack = ExplicitArgs; |
| NumArgsInPartiallySubstitutedPack = NumExplicitArgs; |
| } |
| |
| NamedDecl *LocalInstantiationScope::getPartiallySubstitutedPack( |
| const TemplateArgument **ExplicitArgs, |
| unsigned *NumExplicitArgs) const { |
| if (ExplicitArgs) |
| *ExplicitArgs = nullptr; |
| if (NumExplicitArgs) |
| *NumExplicitArgs = 0; |
| |
| for (const LocalInstantiationScope *Current = this; Current; |
| Current = Current->Outer) { |
| if (Current->PartiallySubstitutedPack) { |
| if (ExplicitArgs) |
| *ExplicitArgs = Current->ArgsInPartiallySubstitutedPack; |
| if (NumExplicitArgs) |
| *NumExplicitArgs = Current->NumArgsInPartiallySubstitutedPack; |
| |
| return Current->PartiallySubstitutedPack; |
| } |
| |
| if (!Current->CombineWithOuterScope) |
| break; |
| } |
| |
| return nullptr; |
| } |
