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This makes use of the changes introduced in D134604
<https://reviews.llvm.org/D134604>, in order to
instantiate non-type template parameters and default template arguments
with a final sugared substitution.
This comes at no additional relevant cost.
Since we don't track / unique them in specializations, we wouldn't be
able to resugar them later anyway.
Signed-off-by: Matheus Izvekov <mizve...@gmail.com>
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D136564
Files:
clang/include/clang/Sema/Sema.h
clang/lib/Sema/SemaTemplate.cpp
clang/lib/Sema/SemaTemplateDeduction.cpp
clang/test/AST/ast-dump-template-decls.cpp
clang/test/CXX/drs/dr3xx.cpp
clang/test/CXX/expr/expr.const/p3-0x.cpp
clang/test/Misc/diag-template-diffing.cpp
clang/test/SemaTemplate/instantiation-default-1.cpp
clang/test/SemaTemplate/make_integer_seq.cpp
Index: clang/test/SemaTemplate/make_integer_seq.cpp
===================================================================
--- clang/test/SemaTemplate/make_integer_seq.cpp
+++ clang/test/SemaTemplate/make_integer_seq.cpp
@@ -69,14 +69,14 @@
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
// CHECK-NEXT: |-TemplateArgument expr
-// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
+// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'T' <Dependent>
// CHECK-NEXT: | `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<type-parameter-0-1, N>' dependent __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template
// CHECK-NEXT: |-TemplateArgument type 'type-parameter-0-1'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'type-parameter-0-1' dependent depth 0 index 1
// CHECK-NEXT: `-TemplateArgument expr
-// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
+// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'T' <Dependent>
// CHECK-NEXT: `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
using test4 = __make_integer_seq<A, T, 1>;
@@ -88,14 +88,14 @@
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
// CHECK-NEXT: |-TemplateArgument expr
-// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
+// CHECK-NEXT: | `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'T' <Dependent>
// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, type-parameter-0-1, 1>' dependent __make_integer_seq
// CHECK-NEXT: |-TemplateArgument template A
// CHECK-NEXT: |-TemplateArgument type 'type-parameter-0-1'
// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'type-parameter-0-1' dependent depth 0 index 1
// CHECK-NEXT: `-TemplateArgument expr
-// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'type-parameter-0-1':'type-parameter-0-1' <Dependent>
+// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'T' <Dependent>
// CHECK-NEXT: `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
using test5 = __make_integer_seq<A, int, N>;
Index: clang/test/SemaTemplate/instantiation-default-1.cpp
===================================================================
--- clang/test/SemaTemplate/instantiation-default-1.cpp
+++ clang/test/SemaTemplate/instantiation-default-1.cpp
@@ -33,7 +33,7 @@
}
typedef int& int_ref_t;
-Def2<int_ref_t> *d2; // expected-note{{in instantiation of default argument for 'Def2<int &>' required here}}
+Def2<int_ref_t> *d2; // expected-note{{in instantiation of default argument for 'Def2<int_ref_t>' required here}}
template<> struct Def1<const int> { }; // expected-error{{redefinition of 'Def1<const int>'}}
Index: clang/test/Misc/diag-template-diffing.cpp
===================================================================
--- clang/test/Misc/diag-template-diffing.cpp
+++ clang/test/Misc/diag-template-diffing.cpp
@@ -1454,7 +1454,7 @@
D<X::X1>(VectorType<X::X2>());
}
// CHECK-ELIDE-NOTREE: error: no matching function for call to 'D'
-// CHECK-ELIDE-NOTREE: note: candidate function template not viable: no known conversion from 'VectorType<X::X2>' to 'const VectorType<(TypeAlias::X)0>' for 1st argument
+// CHECK-ELIDE-NOTREE: note: candidate function template not viable: no known conversion from 'VectorType<X::X2>' to 'const VectorType<(X)0>' for 1st argument
}
namespace TypeAlias2 {
Index: clang/test/CXX/expr/expr.const/p3-0x.cpp
===================================================================
--- clang/test/CXX/expr/expr.const/p3-0x.cpp
+++ clang/test/CXX/expr/expr.const/p3-0x.cpp
@@ -88,7 +88,7 @@
Val<decltype(&noexcept_false), &noexcept_true> remove_noexcept;
Val<decltype(&noexcept_true), &noexcept_false> add_noexcept;
#if __cplusplus > 201402L
-// expected-error@-2 {{value of type 'void (*)() noexcept(false)' is not implicitly convertible to 'void (*)() noexcept'}}
+// expected-error@-2 {{value of type 'void (*)() noexcept(false)' is not implicitly convertible to 'decltype(&noexcept_true)' (aka 'void (*)() noexcept(true)')}}
#endif
// (no other conversions are permitted)
Index: clang/test/CXX/drs/dr3xx.cpp
===================================================================
--- clang/test/CXX/drs/dr3xx.cpp
+++ clang/test/CXX/drs/dr3xx.cpp
@@ -924,9 +924,9 @@
namespace dr368 { // dr368: yes
template<typename T, T> struct S {}; // expected-note {{here}}
template<typename T> int f(S<T, T()> *); // expected-error {{function type}}
- template<typename T> int g(S<T, (T())> *); // cxx98_17-note {{type 'dr368::X'}}
+ template<typename T> int g(S<T, (T())> *); // cxx98_17-note {{type 'X'}}
// cxx20_2b-note@-1 {{candidate function [with T = dr368::X]}}
- template<typename T> int g(S<T, true ? T() : T()> *); // cxx98_17-note {{type 'dr368::X'}}
+ template<typename T> int g(S<T, true ? T() : T()> *); // cxx98_17-note {{type 'X'}}
// cxx20_2b-note@-1 {{candidate function [with T = dr368::X]}}
struct X {};
int n = g<X>(0); // cxx98_17-error {{no matching}}
Index: clang/test/AST/ast-dump-template-decls.cpp
===================================================================
--- clang/test/AST/ast-dump-template-decls.cpp
+++ clang/test/AST/ast-dump-template-decls.cpp
@@ -172,11 +172,9 @@
// CHECK: TypeAliasDecl 0x{{[^ ]*}} <line:{{[1-9]+}}:1, col:23> col:7 test1 'D<subst_default_argument::E, int>':'subst_default_argument::E<int, subst_default_argument::A<int>>'
// CHECK: TemplateSpecializationType 0x{{[^ ]*}} 'A<int>' sugar A
// CHECK-NEXT: |-TemplateArgument type 'int':'int'
-// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[^ ]*}} 'int' sugar class depth 0 index 0 E1
-// CHECK-NEXT: | |-ClassTemplate 0x{{[^ ]*}} 'E'
-// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[^ ]*}} 'int' sugar class depth 0 index 1 D2
-// CHECK-NEXT: | |-TypeAliasTemplate 0x{{[^ ]*}} 'D'
-// CHECK-NEXT: | `-BuiltinType 0x{{[^ ]*}} 'int'
+// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[^ ]*}} 'int' sugar class depth 0 index 1 D2
+// CHECK-NEXT: | |-TypeAliasTemplate 0x{{[^ ]*}} 'D'
+// CHECK-NEXT: | `-BuiltinType 0x{{[^ ]*}} 'int'
// CHECK-NEXT: `-RecordType 0x{{[^ ]*}} 'subst_default_argument::A<int>'
// CHECK-NEXT: `-ClassTemplateSpecialization 0x{{[^ ]*}} 'A'
} // namespace subst_default_argument
Index: clang/lib/Sema/SemaTemplateDeduction.cpp
===================================================================
--- clang/lib/Sema/SemaTemplateDeduction.cpp
+++ clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -2687,12 +2687,12 @@
// itself, in case that substitution fails.
if (SugaredPackedArgsBuilder.empty()) {
LocalInstantiationScope Scope(S);
- MultiLevelTemplateArgumentList Args(Template, CanonicalOutput,
- /*Final=*/false);
+ MultiLevelTemplateArgumentList Args(Template, SugaredOutput,
+ /*Final=*/true);
if (auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Param)) {
Sema::InstantiatingTemplate Inst(S, Template->getLocation(), Template,
- NTTP, CanonicalOutput,
+ NTTP, SugaredOutput,
Template->getSourceRange());
if (Inst.isInvalid() ||
S.SubstType(NTTP->getType(), Args, NTTP->getLocation(),
@@ -2700,7 +2700,7 @@
return true;
} else if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(Param)) {
Sema::InstantiatingTemplate Inst(S, Template->getLocation(), Template,
- TTP, CanonicalOutput,
+ TTP, SugaredOutput,
Template->getSourceRange());
if (Inst.isInvalid() || !S.SubstDecl(TTP, S.CurContext, Args))
return true;
@@ -2810,7 +2810,7 @@
DefArg = S.SubstDefaultTemplateArgumentIfAvailable(
TD, TD->getLocation(), TD->getSourceRange().getEnd(), Param,
- CanonicalBuilder, HasDefaultArg);
+ SugaredBuilder, CanonicalBuilder, HasDefaultArg);
}
// If there was no default argument, deduction is incomplete.
@@ -2960,10 +2960,9 @@
PartialTemplArgInfo->RAngleLoc);
if (S.SubstTemplateArguments(PartialTemplArgInfo->arguments(),
- MultiLevelTemplateArgumentList(
- Partial,
- CanonicalDeducedArgumentList->asArray(),
- /*Final=*/false),
+ MultiLevelTemplateArgumentList(Partial,
+ SugaredBuilder,
+ /*Final=*/true),
InstArgs)) {
unsigned ArgIdx = InstArgs.size(), ParamIdx = ArgIdx;
if (ParamIdx >= Partial->getTemplateParameters()->size())
@@ -3303,8 +3302,8 @@
ExtParameterInfoBuilder ExtParamInfos;
MultiLevelTemplateArgumentList MLTAL(FunctionTemplate,
- CanonicalExplicitArgumentList->asArray(),
- /*Final=*/false);
+ SugaredExplicitArgumentList->asArray(),
+ /*Final=*/true);
// Instantiate the types of each of the function parameters given the
// explicitly-specified template arguments. If the function has a trailing
Index: clang/lib/Sema/SemaTemplate.cpp
===================================================================
--- clang/lib/Sema/SemaTemplate.cpp
+++ clang/lib/Sema/SemaTemplate.cpp
@@ -5256,27 +5256,25 @@
/// \param Converted the list of template arguments provided for template
/// parameters that precede \p Param in the template parameter list.
/// \returns the substituted template argument, or NULL if an error occurred.
-static TypeSourceInfo *
-SubstDefaultTemplateArgument(Sema &SemaRef,
- TemplateDecl *Template,
- SourceLocation TemplateLoc,
- SourceLocation RAngleLoc,
- TemplateTypeParmDecl *Param,
- SmallVectorImpl<TemplateArgument> &Converted) {
+static TypeSourceInfo *SubstDefaultTemplateArgument(
+ Sema &SemaRef, TemplateDecl *Template, SourceLocation TemplateLoc,
+ SourceLocation RAngleLoc, TemplateTypeParmDecl *Param,
+ ArrayRef<TemplateArgument> SugaredConverted,
+ ArrayRef<TemplateArgument> CanonicalConverted) {
TypeSourceInfo *ArgType = Param->getDefaultArgumentInfo();
// If the argument type is dependent, instantiate it now based
// on the previously-computed template arguments.
if (ArgType->getType()->isInstantiationDependentType()) {
- Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc,
- Param, Template, Converted,
+ Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, Param, Template,
+ SugaredConverted,
SourceRange(TemplateLoc, RAngleLoc));
if (Inst.isInvalid())
return nullptr;
// Only substitute for the innermost template argument list.
- MultiLevelTemplateArgumentList TemplateArgLists(Template, Converted,
- /*Final=*/false);
+ MultiLevelTemplateArgumentList TemplateArgLists(Template, SugaredConverted,
+ /*Final=*/true);
for (unsigned i = 0, e = Param->getDepth(); i != e; ++i)
TemplateArgLists.addOuterTemplateArguments(None);
@@ -5315,22 +5313,20 @@
/// parameters that precede \p Param in the template parameter list.
///
/// \returns the substituted template argument, or NULL if an error occurred.
-static ExprResult
-SubstDefaultTemplateArgument(Sema &SemaRef,
- TemplateDecl *Template,
- SourceLocation TemplateLoc,
- SourceLocation RAngleLoc,
- NonTypeTemplateParmDecl *Param,
- SmallVectorImpl<TemplateArgument> &Converted) {
- Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc,
- Param, Template, Converted,
+static ExprResult SubstDefaultTemplateArgument(
+ Sema &SemaRef, TemplateDecl *Template, SourceLocation TemplateLoc,
+ SourceLocation RAngleLoc, NonTypeTemplateParmDecl *Param,
+ ArrayRef<TemplateArgument> SugaredConverted,
+ ArrayRef<TemplateArgument> CanonicalConverted) {
+ Sema::InstantiatingTemplate Inst(SemaRef, TemplateLoc, Param, Template,
+ SugaredConverted,
SourceRange(TemplateLoc, RAngleLoc));
if (Inst.isInvalid())
return ExprError();
// Only substitute for the innermost template argument list.
- MultiLevelTemplateArgumentList TemplateArgLists(Template, Converted,
- /*Final=*/false);
+ MultiLevelTemplateArgumentList TemplateArgLists(Template, SugaredConverted,
+ /*Final=*/true);
for (unsigned i = 0, e = Param->getDepth(); i != e; ++i)
TemplateArgLists.addOuterTemplateArguments(None);
@@ -5365,23 +5361,21 @@
/// source-location information) that precedes the template name.
///
/// \returns the substituted template argument, or NULL if an error occurred.
-static TemplateName
-SubstDefaultTemplateArgument(Sema &SemaRef,
- TemplateDecl *Template,
- SourceLocation TemplateLoc,
- SourceLocation RAngleLoc,
- TemplateTemplateParmDecl *Param,
- SmallVectorImpl<TemplateArgument> &Converted,
- NestedNameSpecifierLoc &QualifierLoc) {
+static TemplateName SubstDefaultTemplateArgument(
+ Sema &SemaRef, TemplateDecl *Template, SourceLocation TemplateLoc,
+ SourceLocation RAngleLoc, TemplateTemplateParmDecl *Param,
+ ArrayRef<TemplateArgument> SugaredConverted,
+ ArrayRef<TemplateArgument> CanonicalConverted,
+ NestedNameSpecifierLoc &QualifierLoc) {
Sema::InstantiatingTemplate Inst(
- SemaRef, TemplateLoc, TemplateParameter(Param), Template, Converted,
- SourceRange(TemplateLoc, RAngleLoc));
+ SemaRef, TemplateLoc, TemplateParameter(Param), Template,
+ SugaredConverted, SourceRange(TemplateLoc, RAngleLoc));
if (Inst.isInvalid())
return TemplateName();
// Only substitute for the innermost template argument list.
- MultiLevelTemplateArgumentList TemplateArgLists(Template, Converted,
- /*Final=*/false);
+ MultiLevelTemplateArgumentList TemplateArgLists(Template, SugaredConverted,
+ /*Final=*/true);
for (unsigned i = 0, e = Param->getDepth(); i != e; ++i)
TemplateArgLists.addOuterTemplateArguments(None);
@@ -5405,14 +5399,11 @@
/// If the given template parameter has a default template
/// argument, substitute into that default template argument and
/// return the corresponding template argument.
-TemplateArgumentLoc
-Sema::SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
- SourceLocation TemplateLoc,
- SourceLocation RAngleLoc,
- Decl *Param,
- SmallVectorImpl<TemplateArgument>
- &Converted,
- bool &HasDefaultArg) {
+TemplateArgumentLoc Sema::SubstDefaultTemplateArgumentIfAvailable(
+ TemplateDecl *Template, SourceLocation TemplateLoc,
+ SourceLocation RAngleLoc, Decl *Param,
+ ArrayRef<TemplateArgument> SugaredConverted,
+ ArrayRef<TemplateArgument> CanonicalConverted, bool &HasDefaultArg) {
HasDefaultArg = false;
if (TemplateTypeParmDecl *TypeParm = dyn_cast<TemplateTypeParmDecl>(Param)) {
@@ -5420,11 +5411,9 @@
return TemplateArgumentLoc();
HasDefaultArg = true;
- TypeSourceInfo *DI = SubstDefaultTemplateArgument(*this, Template,
- TemplateLoc,
- RAngleLoc,
- TypeParm,
- Converted);
+ TypeSourceInfo *DI = SubstDefaultTemplateArgument(
+ *this, Template, TemplateLoc, RAngleLoc, TypeParm, SugaredConverted,
+ CanonicalConverted);
if (DI)
return TemplateArgumentLoc(TemplateArgument(DI->getType()), DI);
@@ -5437,11 +5426,9 @@
return TemplateArgumentLoc();
HasDefaultArg = true;
- ExprResult Arg = SubstDefaultTemplateArgument(*this, Template,
- TemplateLoc,
- RAngleLoc,
- NonTypeParm,
- Converted);
+ ExprResult Arg = SubstDefaultTemplateArgument(
+ *this, Template, TemplateLoc, RAngleLoc, NonTypeParm, SugaredConverted,
+ CanonicalConverted);
if (Arg.isInvalid())
return TemplateArgumentLoc();
@@ -5456,12 +5443,9 @@
HasDefaultArg = true;
NestedNameSpecifierLoc QualifierLoc;
- TemplateName TName = SubstDefaultTemplateArgument(*this, Template,
- TemplateLoc,
- RAngleLoc,
- TempTempParm,
- Converted,
- QualifierLoc);
+ TemplateName TName = SubstDefaultTemplateArgument(
+ *this, Template, TemplateLoc, RAngleLoc, TempTempParm, SugaredConverted,
+ CanonicalConverted, QualifierLoc);
if (TName.isNull())
return TemplateArgumentLoc();
@@ -5557,13 +5541,13 @@
!Template->getDeclContext()->isDependentContext()) {
// Do substitution on the type of the non-type template parameter.
InstantiatingTemplate Inst(*this, TemplateLoc, Template, NTTP,
- CanonicalConverted,
+ SugaredConverted,
SourceRange(TemplateLoc, RAngleLoc));
if (Inst.isInvalid())
return true;
- MultiLevelTemplateArgumentList MLTAL(Template, CanonicalConverted,
- /*Final=*/false);
+ MultiLevelTemplateArgumentList MLTAL(Template, SugaredConverted,
+ /*Final=*/true);
// If the parameter is a pack expansion, expand this slice of the pack.
if (auto *PET = NTTPType->getAs<PackExpansionType>()) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this,
@@ -5728,7 +5712,7 @@
Params =
SubstTemplateParams(Params, CurContext,
MultiLevelTemplateArgumentList(
- Template, CanonicalConverted, /*Final=*/false));
+ Template, SugaredConverted, /*Final=*/true));
if (!Params)
return true;
}
@@ -6007,7 +5991,8 @@
NewArgs);
TypeSourceInfo *ArgType = SubstDefaultTemplateArgument(
- *this, Template, TemplateLoc, RAngleLoc, TTP, CanonicalConverted);
+ *this, Template, TemplateLoc, RAngleLoc, TTP, SugaredConverted,
+ CanonicalConverted);
if (!ArgType)
return true;
@@ -6020,7 +6005,8 @@
NewArgs);
ExprResult E = SubstDefaultTemplateArgument(
- *this, Template, TemplateLoc, RAngleLoc, NTTP, CanonicalConverted);
+ *this, Template, TemplateLoc, RAngleLoc, NTTP, SugaredConverted,
+ CanonicalConverted);
if (E.isInvalid())
return true;
@@ -6036,8 +6022,8 @@
NestedNameSpecifierLoc QualifierLoc;
TemplateName Name = SubstDefaultTemplateArgument(
- *this, Template, TemplateLoc, RAngleLoc, TempParm, CanonicalConverted,
- QualifierLoc);
+ *this, Template, TemplateLoc, RAngleLoc, TempParm, SugaredConverted,
+ CanonicalConverted, QualifierLoc);
if (Name.isNull())
return true;
@@ -6051,7 +6037,7 @@
// template here, we just create this object to put a note into the
// context stack.
InstantiatingTemplate Inst(*this, RAngleLoc, Template, *Param,
- CanonicalConverted,
+ SugaredConverted,
SourceRange(TemplateLoc, RAngleLoc));
if (Inst.isInvalid())
return true;
Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -8203,14 +8203,11 @@
SourceLocation TemplateLoc,
Declarator &D);
- TemplateArgumentLoc
- SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template,
- SourceLocation TemplateLoc,
- SourceLocation RAngleLoc,
- Decl *Param,
- SmallVectorImpl<TemplateArgument>
- &Converted,
- bool &HasDefaultArg);
+ TemplateArgumentLoc SubstDefaultTemplateArgumentIfAvailable(
+ TemplateDecl *Template, SourceLocation TemplateLoc,
+ SourceLocation RAngleLoc, Decl *Param,
+ ArrayRef<TemplateArgument> SugaredConverted,
+ ArrayRef<TemplateArgument> CanonicalConverted, bool &HasDefaultArg);
/// Specifies the context in which a particular template
/// argument is being checked.
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