b2d0c16e91
This implements the 'using enum maybe-qualified-enum-tag ;' part of
1099. It introduces a new 'UsingEnumDecl', subclassed from
'BaseUsingDecl'. Much of the diff is the boilerplate needed to get the
new class set up.
There is one case where we accept ill-formed, but I believe this is
merely an extended case of an existing bug, so consider it
orthogonal. AFAICT in class-scope the c++20 rule is that no 2 using
decls can bring in the same target decl ([namespace.udecl]/8). But we
already accept:
struct A { enum { a }; };
struct B : A { using A::a; };
struct C : B { using A::a;
using B::a; }; // same enumerator
this patch permits mixtures of 'using enum Bob;' and 'using Bob::member;' in the same way.
Differential Revision: https://reviews.llvm.org/D102241
31 lines
1 KiB
C++
31 lines
1 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++20 -ast-dump -ast-dump-filter Foo %s | FileCheck -strict-whitespace %s
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// Test with serialization:
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown -emit-pch -o %t %s
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// RUN: %clang_cc1 -x c++ -std=c++20 -triple x86_64-unknown-unknown -include-pch %t \
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// RUN: -ast-dump-all -ast-dump-filter Foo /dev/null \
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// RUN: | FileCheck --strict-whitespace %s
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namespace Bob {
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enum class Foo {
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Foo_a,
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Foo_b
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};
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}; // namespace Bob
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using enum Bob::Foo;
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// CHECK-LABEL: Dumping Bob::Foo
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// CHECK-NEXT: EnumDecl {{.*}} class Foo 'int'
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// CHECK-NEXT: |-EnumConstantDecl {{.*}} Foo_a 'Bob::Foo'
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// CHECK-NEXT: `-EnumConstantDecl {{.*}} Foo_b 'Bob::Foo'
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// CHECK-LABEL: Dumping Foo:
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// CHECK-NEXT: UsingEnumDecl {{.*}} Enum {{.*}} 'Foo'
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// CHECK-LABEL: Dumping Foo_a:
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// CHECK-NEXT: UsingShadowDecl {{.*}} implicit EnumConstant {{.*}} 'Foo_a' 'Bob::Foo'
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// CHECK-LABEL: Dumping Foo_b:
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// CHECK-NEXT: UsingShadowDecl {{.*}} implicit EnumConstant {{.*}} 'Foo_b' 'Bob::Foo'
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