Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/lambda-uneval2.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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// { dg-do compile { target c++2a } } // ill-formed, no diagnostic required: the two expressions are // functionally equivalent but not equivalent template <int N> void foo(const char (&s)[([]{}, N)]); template <int N> void foo(const char (&s)[([]{}, N)]); // two different declarations because the non-dependent portions are not // considered equivalent template <class T> void spam(decltype([]{}) (*s)[sizeof(T)]); template <class T> void spam(decltype([]{}) (*s)[sizeof(T)]); template <class T> using A = decltype([] { }); // A<int> and A<char> refer to different closure types template <class T> auto f(T) -> decltype([]() { T::invalid; } ()); // { dg-error "invalid" } void f(...); template <class T, unsigned = sizeof([]() { T::invalid; })> // { dg-error "invalid" } void g(T); void g(...); template <class T> auto h(T) -> decltype([x = T::invalid]() { }); void h(...); template <class T> auto i(T) -> decltype([]() -> typename T::invalid { }); void i(...); template <class T> auto j(T t) -> decltype([](auto x) -> decltype(x.invalid) { } (t)); void j(...); template <class,class> struct different {}; template <class T> struct different<T,T> { typename T::invalid t; }; template <class,class> struct same; template <class T> struct same<T,T> {}; int main() { foo<1>(""); // { dg-error "ambiguous" } spam<char>(nullptr); // { dg-error "ambiguous" } different<A<int>,A<char>>(); same<A<int>,A<int>>(); f(0); // error: invalid expression not part of the immediate context g(0); // error: invalid expression not part of the immediate context h(0); // error: invalid expression not part of the immediate context i(0); // error: invalid expression not part of the immediate context j(0); // deduction fails on #1, calls #2 }