================
@@ -568,6 +568,80 @@ namespace cwg137 { // cwg137: yes
const volatile int *cvqcv = static_cast<const volatile int*>(cvp);
}
+namespace cwg138 { // cwg138: partial
+namespace example1 {
+void foo(); // #cwg138-ex1-foo
+namespace A {
+ using example1::foo; // #cwg138-ex1-using
+ class X {
+ static const int i = 10;
+ // This friend declaration is using neither qualified-id nor template-id,
+ // so name 'foo' is not looked up, which means the using-declaration has
no effect.
+ // Target scope of this declaration is A, so this is grating friendship to
+ // (hypothetical) A::foo instead of 'example1::foo' using declaration
refers to.
+ // A::foo corresponds to example1::foo named by the using declaration,
+ // and since A::foo is a different entity, they potentially conflict.
+ // FIXME: This is ill-formed, but not for the reason diagnostic says.
+ friend void foo();
+ // expected-error@-1 {{cannot befriend target of using declaration}}
+ // expected-note@#cwg138-ex1-foo {{target of using declaration}}
+ // expected-note@#cwg138-ex1-using {{using declaration}}
----------------
Endilll wrote:
It has that good first issue feel, so I'll refrain for now. But I'll get to all
name lookup issues when I'm done with writing tests for P1787R6.
https://github.com/llvm/llvm-project/pull/106117
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