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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
614 B
C
27 lines
614 B
C
// PR c++/91364 - Implement P0388R4: Permit conversions to arrays of unknown bound.
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// { dg-do compile { target c++20 } }
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struct A {
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A();
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A(const A(&)[2]);
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};
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using T = A[];
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using U = A[2];
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// t binds directly to U{} now. Before it bound indirectly to a temporary
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// A{U{}}. ??? But we don't do it now; see reference_binding and the
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// BRACE_ENCLOSED_INITIALIZER_P block.
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A (&&t)[] = {U{}};
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U u{};
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T &
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foo ()
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{
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// This didn't compile before P0388R4: invalid initialization of non-const
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// reference of type 'A (&)[]' from an rvalue of type
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// '<brace-enclosed initializer list>'.
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return {u};
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}
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