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// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++23 %t/A.cppm -emit-module-interface -o %t/A.pcm
// RUN: %clang_cc1 -std=c++23 %t/Use.cpp -fprebuilt-module-path=%t -fsyntax-only -verify
//--- A.cppm
module;
export module A;
struct B {};
export template<int N> struct A : B {
friend constexpr const int *f(B) requires true {
static constexpr int result = N;
return &result;
}
template<int M>
friend constexpr const int *g(B) requires (M >= 0) && (N >= 0) {
static constexpr int result = M * 10 + N;
return &result;
}
};
export inline A<1> a1;
export inline A<2> a2;
export inline A<3> a3;
static_assert(f(a1) != f(a2) && f(a2) != f(a3));
static_assert(g<1>(a1) != g<1>(a2) && g<1>(a2) != g<1>(a3));
static_assert(*f(a1) == 1);
static_assert(*f(a2) == 2);
static_assert(*f(a3) == 3);
static_assert(*g<4>(a1) == 41);
static_assert(*g<5>(a2) == 52);
static_assert(*g<6>(a3) == 63);
//--- Use.cpp
// expected-no-diagnostics
import A;
// Try some instantiations we tried before and some we didn't.
static_assert(f(a1) != f(a2) && f(a2) != f(a3));
static_assert(g<1>(a1) != g<1>(a2) && g<1>(a2) != g<1>(a3));
static_assert(g<2>(a1) != g<2>(a2) && g<2>(a2) != g<2>(a3));
A<4> a4;
static_assert(f(a1) != f(a4) && f(a2) != f(a4) && f(a3) != f(a4));
static_assert(g<3>(a1) != g<3>(a4));
static_assert(*f(a1) == 1);
static_assert(*f(a2) == 2);
static_assert(*f(a3) == 3);
static_assert(*f(a4) == 4);
static_assert(*g<4>(a1) == 41);
static_assert(*g<5>(a2) == 52);
static_assert(*g<6>(a3) == 63);
static_assert(*g<7>(a1) == 71);
static_assert(*g<8>(a4) == 84);
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