forked from OSchip/llvm-project
34 lines
791 B
C++
34 lines
791 B
C++
// RUN: %clang_cc1 -std=c++2a -verify %s
|
|
// RUN: %clang_cc1 -std=c++2a -verify %s -fno-concept-satisfaction-caching -DNO_CACHE
|
|
// expected-no-diagnostics
|
|
|
|
template<typename T>
|
|
concept C = (f(T()), true);
|
|
|
|
template<typename T>
|
|
constexpr bool foo() { return false; }
|
|
|
|
template<typename T>
|
|
requires (f(T()), true)
|
|
constexpr bool foo() requires (f(T()), true) { return true; }
|
|
|
|
namespace a {
|
|
struct A {};
|
|
void f(A a);
|
|
}
|
|
|
|
static_assert(C<a::A>);
|
|
static_assert(foo<a::A>());
|
|
|
|
namespace a {
|
|
// This makes calls to f ambiguous, but the second check will still succeed
|
|
// because the constraint satisfaction results are cached.
|
|
void f(A a, int = 2);
|
|
}
|
|
#ifdef NO_CACHE
|
|
static_assert(!C<a::A>);
|
|
static_assert(!foo<a::A>());
|
|
#else
|
|
static_assert(C<a::A>);
|
|
static_assert(foo<a::A>());
|
|
#endif |