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[clang] Improve ast-dumper text printing of TemplateArgument
This improves and unifies our approach to printing all template arguments. The same approach to printing types is extended to all TemplateArguments: A sugared version is printed in quotes, followed by printing the canonical form, unless they would print the same. Special improvements are done to add more detail to template template arguments. It's planned in a future patch to use this improved TemplateName printer for other places besides TemplateArguments. Note: The sugared/desugared printing does not show up for TemplateNames in tests yet, because we do a poor job of preserving their type sugar. This will be improved in a future patch.
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Original file line number | Diff line number | Diff line change |
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// RUN: %clang_cc1 -std=c++26 -ast-dump -ast-dump-filter=Test %s | FileCheck %s | ||
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template <template <class> class TT> using N = TT<int>; | ||
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namespace qualified { | ||
namespace foo { | ||
template <class T> struct A; | ||
} // namespace foo | ||
using TestQualified = N<foo::A>; | ||
} // namespace qualified | ||
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// CHECK: Dumping qualified::TestQualified: | ||
// CHECK-NEXT: TypeAliasDecl | ||
// CHECK-NEXT: `-ElaboratedType | ||
// CHECK-NEXT: `-TemplateSpecializationType | ||
// CHECK-NEXT: |-TemplateArgument template 'qualified::foo::A' qualified{{$}} | ||
// CHECK-NEXT: | |-NestedNameSpecifier Namespace 0x{{.+}} 'foo'{{$}} | ||
// CHECK-NEXT: | `-ClassTemplateDecl {{.+}} A{{$}} | ||
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namespace dependent { | ||
template <class T> struct B { | ||
using TestDependent = N<T::template X>; | ||
}; | ||
} // namespace dependent | ||
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// CHECK: Dumping dependent::B::TestDependent: | ||
// CHECK-NEXT: TypeAliasDecl | ||
// CHECK-NEXT: `-ElaboratedType | ||
// CHECK-NEXT: `-TemplateSpecializationType | ||
// CHECK-NEXT: |-TemplateArgument template 'template X' dependent{{$}} | ||
// CHECK-NEXT: | `-NestedNameSpecifier TypeSpec 'T'{{$}} | ||
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namespace subst { | ||
template <class> struct A; | ||
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template <template <class> class TT> struct B { | ||
template <template <class> class> struct C {}; | ||
using type = C<TT>; | ||
}; | ||
using TestSubst = B<A>::type; | ||
} // namespace subst | ||
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// CHECK: Dumping subst::TestSubst: | ||
// CHECK-NEXT: TypeAliasDecl | ||
// CHECK-NEXT: `-ElaboratedType | ||
// CHECK-NEXT: `-TypedefType | ||
// CHECK-NEXT: |-TypeAlias | ||
// CHECK-NEXT: `-ElaboratedType | ||
// CHECK-NEXT: `-TemplateSpecializationType | ||
// CHECK-NEXT: |-TemplateArgument template 'subst::A' subst index 0 | ||
// CHECK-NEXT: | |-parameter: TemplateTemplateParmDecl {{.+}} depth 0 index 0 TT{{$}} | ||
// CHECK-NEXT: | |-associated ClassTemplateSpecialization {{.+}} 'B'{{$}} | ||
// CHECK-NEXT: | `-replacement: | ||
// CHECK-NEXT: | `-ClassTemplateDecl {{.+}} A{{$}} |
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