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
893 B
C
27 lines
893 B
C
// PR c++/69531 - DR 1307, Overload resolution based on size of array init-list.
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// { dg-do run { target c++20 } }
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// Example from [over.ics.rank].
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int f(int (&&)[] ) { return 1; } // #1
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int f(double (&&)[] ) { return 2; } // #2
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int f(int (&&)[2]) { return 3; } // #3
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int
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main ()
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{
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// Calls #1: Better than #2 due to conversion, better than #3 due to bounds.
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if (f({1}) != 1)
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__builtin_abort ();
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// Calls #2: Identity conversion is better than floating-integral conversion.
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if (f({1.0}) != 2)
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__builtin_abort ();
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// Calls #2: Identity conversion is better than floating-integral conversion.
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if (f({1.0, 2.0}) != 2)
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__builtin_abort ();
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// Calls #3: Converting to array of known bound is better than to unknown
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// bound, and an identity conversion is better than floating-integral
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// conversion.
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if (f({1, 2}) != 3)
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__builtin_abort ();
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}
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