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// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: split-file %s %t
// RUN: %clang_cc1 -std=c++20 %t/a.cppm -emit-reduced-module-interface -o %t/a.pcm
// RUN: %clang_cc1 -std=c++20 %t/b.cppm -fmodule-file=a=%t/a.pcm -fsyntax-only -verify
//--- a.cppm
export module a;
struct Base {
template <class T>
friend constexpr auto f(T) { return 0; }
};
export struct A: Base {};
//--- b.cppm
export module b;
import a;
namespace n {
struct B {};
auto b() -> void {
f(A{});
f(B{}); // expected-error {{use of undeclared identifier 'f'}}
}
} // namespace n
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