Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/lambda/lambda-sfinae1.C @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 1830386684a0 |
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// PR c++/56039 // { dg-do compile { target c++11 } } template <bool> struct BoolSink { typedef void type; }; template <typename T, typename U> struct AddRvalueReferenceImpl { typedef T type; }; template <typename T> struct AddRvalueReferenceImpl<T, typename BoolSink<false && [] { // { dg-error "lambda" } extern T &&tref; }>::type> { typedef T &&type; }; template <typename T> struct AddRvalueReference : AddRvalueReferenceImpl<T, void> { }; namespace ImplHelpers { template <typename T> typename AddRvalueReference<T>::type create(void) { } } template <typename T, typename U, typename ...Args> struct IsConstructibleImpl { enum { value = 0 }; }; template <typename T, typename ...Args> struct IsConstructibleImpl<T, typename BoolSink<false && [] { // { dg-error "lambda" } T t( ::ImplHelpers::create<Args>() ...); }>::type, Args ...> { enum { value = 1 }; }; template <typename T, typename ...Args> struct IsConstructible : IsConstructibleImpl<T, void, Args ...> { }; struct DestroyMe { ~DestroyMe() = delete; }; static_assert(+IsConstructible<int>::value, "error"); static_assert(!IsConstructible<void>::value, "error"); static_assert(+IsConstructible<int [1]>::value, "error"); static_assert(!IsConstructible<DestroyMe>::value, "error"); static_assert(!IsConstructible<int *, char *>::value, "error"); static_assert(+IsConstructible<int &&, int>::value, "error"); static_assert(!IsConstructible<int &&, int &>::value, "error"); static_assert(+IsConstructible<int &&, int &&>::value, "error"); // { dg-prune-output "expected" } // { dg-prune-output "does not name a class" } // { dg-prune-output "static assertion" } // { dg-prune-output "template argument . is invalid" }