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// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 %t/A.cppm -emit-module-interface -o %t/A.pcm
// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t -DDIFFERENT %t/B.cppm -verify
// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/B.cppm -verify
//--- foo.h
#ifndef FOO_H
#define FOO_H
template <class T>
concept Range = requires(T &t) { t.begin(); };
template<class _Tp>
concept __integer_like = true;
template <class _Tp>
concept __member_size = requires(_Tp &&t) { t.size(); };
template <class First, class Second>
concept C = requires(First x, Second y) { x + y; };
struct A {
public:
template <Range T>
using range_type = T;
};
struct __fn {
template <__member_size _Tp>
constexpr __integer_like auto operator()(_Tp&& __t) const {
return __t.size();
}
template <__integer_like _Tp, C<_Tp> Sentinel>
constexpr _Tp operator()(_Tp &&__t, Sentinel &&last) const {
return __t;
}
template <template <class> class H, class S, C<H<S>> Sentinel>
constexpr H<S> operator()(H<S> &&__s, Sentinel &&last) const {
return __s;
}
// Tests that we could find different concept definition indeed.
#ifndef DIFFERENT
template <__integer_like _Tp, __integer_like _Up, C<_Tp> Sentinel>
constexpr _Tp operator()(_Tp &&__t, _Up _u, Sentinel &&last) const {
return __t;
}
#else
template <__integer_like _Tp, __integer_like _Up, C<_Up> Sentinel>
constexpr _Tp operator()(_Tp &&__t, _Up _u, Sentinel &&last) const {
return __t;
}
#endif
};
#endif
//--- A.cppm
module;
#include "foo.h"
export module A;
//--- B.cppm
module;
#include "foo.h"
export module B;
import A;
#ifdef DIFFERENT
// expected-error@foo.h:41 {{'__fn::operator()' from module 'A.<global>' is not present in definition of '__fn' provided earlier}}
// expected-note@* 1+{{declaration of 'operator()' does not match}}
#else
// expected-no-diagnostics
#endif
template <class T>
struct U {
auto operator+(U) { return 0; }
};
void foo() {
A a;
struct S {
int size() { return 0; }
auto operator+(S s) { return 0; }
};
__fn{}(S());
__fn{}(S(), S());
__fn{}(S(), S(), S());
__fn{}(U<int>(), U<int>());
}
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