================
@@ -24,6 +44,103 @@ using enum E;
#endif
}
+namespace cwg2627 { // cwg2627: 19
+#if __cplusplus >= 202002L
+struct C {
+ long long i : 8;
+ friend auto operator<=>(C, C) = default;
+};
+
+void f() {
+ C x{1}, y{2};
+ static_cast<void>(x <=> y);
+ static_cast<void>(x.i <=> y.i);
+}
+
+template<typename T>
+struct CDependent {
+ T i : 8;
+ friend auto operator<=>(CDependent, CDependent) = default;
+};
+
+template<typename T>
+concept three_way_comparable = requires(T t) { { t <=> t }; };
+template<typename T>
+concept bf_three_way_comparable = requires(T t) { { t.i <=> t.i }; };
+static_assert(three_way_comparable<CDependent<long long>>);
+static_assert(bf_three_way_comparable<CDependent<long long>>);
+#endif
+
+#if __cplusplus >= 201103L
+template<int W>
+struct D {
+ __int128 i : W;
+};
+
+template<int W>
+std::int64_t f(D<W> d) {
+ return std::int64_t{ d.i }; // #cwg2627-f
+}
+
+template std::int64_t f(D<63>);
+template std::int64_t f(D<64>);
+template std::int64_t f(D<65>);
+// since-cxx11-error-re@#cwg2627-f {{non-constant-expression cannot be
narrowed from type '__int128' to 'std::int64_t' (aka '{{.+}}') in initializer
list}}
----------------
MitalAshok wrote:
This is a regex because we don't know what `int64_t` is an alias for (`long` or
`long long`). Can I expect that it will always be `long` because these tests
are run with `-triple x86_64-unknown-unknown`?
https://github.com/llvm/llvm-project/pull/78112
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