b04445d4a8
C++20 isn't final quite yet, but all that remains is formalities, so let's go ahead and change all the references. I think for the next C++ standard we can just call it C++23 rather than C++2b, since the committee has been consistent about time-based releases rather than feature-based. gcc/c-family/ChangeLog 2020-05-13 Jason Merrill <jason@redhat.com> * c.opt (std=c++20): Make c++2a the alias. (std=gnu++20): Likewise. * c-common.h (cxx_dialect): Change cxx2a to cxx20. * c-opts.c: Adjust. * c-cppbuiltin.c: Adjust. * c-ubsan.c: Adjust. * c-warn.c: Adjust. gcc/cp/ChangeLog 2020-05-13 Jason Merrill <jason@redhat.com> * call.c, class.c, constexpr.c, constraint.cc, decl.c, init.c, lambda.c, lex.c, method.c, name-lookup.c, parser.c, pt.c, tree.c, typeck2.c: Change cxx2a to cxx20. libcpp/ChangeLog 2020-05-13 Jason Merrill <jason@redhat.com> * include/cpplib.h (enum c_lang): Change CXX2A to CXX20. * init.c, lex.c: Adjust.
27 lines
775 B
C
27 lines
775 B
C
// { dg-do compile { target c++20 } }
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static decltype([] { }) f();
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static decltype([] { }) f(); // { dg-error "ambiguating" }
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static decltype([] { }) g();
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static decltype(g()) g(); // okay
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static void h(decltype([] { }) *) { }
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static void h(decltype([] { }) *) { }
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void x1() { h(nullptr); } // { dg-error "ambiguous" }
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using A = decltype([] { });
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static void i(A *);
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static void i(A *) { }
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void x2() { i(nullptr); } // okay
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template <typename T>
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using B = decltype([] { });
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static void j(B<char16_t> *) { }
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static void j(B<char32_t> *) { }
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void x3() { j(nullptr); } // { dg-error "ambiguous" }
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template <int N> static void k(decltype([]{ return 0; }()));
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template <int N> static void k(decltype([]{ return 0; }())); // okay
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template <int N> static void k(int); // okay
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