89 lines
2 KiB
Text
89 lines
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++23 %t/a.cppm -emit-module-interface -o %t/m-a.pcm
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// RUN: %clang_cc1 -std=c++23 %t/b.cppm -emit-module-interface -o %t/m-b.pcm
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// RUN: %clang_cc1 -std=c++23 %t/m.cppm -emit-module-interface -o %t/m.pcm \
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// RUN: -fprebuilt-module-path=%t
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// RUN: %clang_cc1 -std=c++23 %t/pr63544.cpp -fprebuilt-module-path=%t -fsyntax-only -verify
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//--- foo.h
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namespace std {
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struct strong_ordering {
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int n;
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constexpr operator int() const { return n; }
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static const strong_ordering equal, greater, less;
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};
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constexpr strong_ordering strong_ordering::equal = {0};
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constexpr strong_ordering strong_ordering::greater = {1};
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constexpr strong_ordering strong_ordering::less = {-1};
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} // namespace std
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namespace std {
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template <typename _Tp>
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class optional {
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private:
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using value_type = _Tp;
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value_type __val_;
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bool __engaged_;
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public:
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constexpr bool has_value() const noexcept
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{
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return this->__engaged_;
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}
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constexpr const value_type& operator*() const& noexcept
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{
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return __val_;
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}
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optional(_Tp v) : __val_(v) {
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__engaged_ = true;
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}
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};
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template <class _Tp>
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concept __is_derived_from_optional = requires(const _Tp& __t) { []<class __Up>(const optional<__Up>&) {}(__t); };
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template <class _Tp, class _Up>
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requires(!__is_derived_from_optional<_Up>)
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constexpr strong_ordering
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operator<=>(const optional<_Tp>& __x, const _Up& __v) {
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return __x.has_value() ? *__x <=> __v : strong_ordering::less;
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}
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} // namespace std
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//--- a.cppm
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module;
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#include "foo.h"
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export module m:a;
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export namespace std {
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using std::optional;
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using std::operator<=>;
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}
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//--- b.cppm
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module;
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#include "foo.h"
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export module m:b;
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export namespace std {
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using std::optional;
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using std::operator<=>;
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}
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//--- m.cppm
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export module m;
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export import :a;
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export import :b;
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//--- pr63544.cpp
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// expected-no-diagnostics
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import m;
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int pr63544() {
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std::optional<int> a(43);
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int t{3};
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return a<=>t;
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}
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