100 lines
2.2 KiB
Text
100 lines
2.2 KiB
Text
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// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// RUN: split-file %s %t
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//
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// RUN: %clang_cc1 -std=c++20 %t/a.cppm -emit-module-interface -o %t/a.pcm
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// RUN: %clang_cc1 -std=c++20 %t/b.cppm -emit-module-interface -o %t/b.pcm
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// RUN: %clang_cc1 -std=c++20 %t/c.cppm -emit-module-interface \
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// RUN: -fprebuilt-module-path=%t -o %t/c.pcm
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// RUN: %clang_cc1 -std=c++20 %t/use.cpp -fprebuilt-module-path=%t \
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// RUN: -fsyntax-only -verify
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//--- foo.h
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#ifndef FOO_H
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#define FOO_H
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template<class _Tp>
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concept __has_member_value_type = requires { typename _Tp::value_type; };
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template<class _Tp>
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concept __has_member_element_type = requires { typename _Tp::element_type; };
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template <class _Tp>
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inline constexpr bool is_object_v = __is_object(_Tp);
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template<class> struct __cond_value_type {};
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template<class _Tp>
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requires is_object_v<_Tp>
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struct __cond_value_type<_Tp> { using value_type = bool; };
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template<class> struct indirectly_readable_traits {
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static constexpr int value = false;
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};
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#endif
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//--- foo.member_value_type.h
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#include "foo.h"
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template<__has_member_value_type _Tp>
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struct indirectly_readable_traits<_Tp> : __cond_value_type<typename _Tp::value_type> {
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static constexpr int value = false;
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};
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//--- foo.memeber_element_type.h
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#include "foo.h"
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template<__has_member_element_type _Tp>
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struct indirectly_readable_traits<_Tp> : __cond_value_type<typename _Tp::element_type> {
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static constexpr int value = false;
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};
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template<__has_member_value_type _Tp>
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requires __has_member_element_type<_Tp>
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struct indirectly_readable_traits<_Tp> {
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static constexpr int value = true;
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};
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//--- foo.a.h
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#include "foo.h"
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#include "foo.member_value_type.h"
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#include "foo.memeber_element_type.h"
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template <typename T>
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using AType = indirectly_readable_traits<T>;
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//--- a.cppm
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module;
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#include "foo.a.h"
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export module a;
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export using ::AType;
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//--- b.cppm
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module;
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#include "foo.h"
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#include "foo.memeber_element_type.h"
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export module b;
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//--- c.cppm
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export module c;
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export import a;
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export import b;
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//--- use.cpp
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// expected-no-diagnostics
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import c;
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template <typename T>
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class U {
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public:
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using value_type = T;
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using element_type = T;
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};
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template <typename T>
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class V {
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public:
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};
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static_assert(!AType<V<int*>>::value);
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static_assert(AType<U<int**>>::value);
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