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.
25 lines
787 B
C
25 lines
787 B
C
// PR c++/91364 - Implement P0388R4: Permit conversions to arrays of unknown bound.
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// { dg-do run { target c++20 } }
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// Ranking of list-initialization sequences
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int b(int (&&)[] ) { return 1; } // #1
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int b(long (&&)[] ) { return 2; } // #2
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int b(int (&&)[1]) { return 3; } // #3
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int b(long (&&)[1]) { return 4; } // #4
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int b(int (&&)[2]) { return 5; } // #5
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/* Here,
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-- #1, #3 and #5 should rank better than both #2 and #4, as no promotion
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is necessitated.
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-- #1 should rank worse than #3, being far less specialized.
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-- #1 should rank better than #5, as the latter requires a larger array
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temporary. (#3 also ranks better than #5 for the same reason--cf. core
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issue 1307). */
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int
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main ()
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{
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if (b({1}) != 3)
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__builtin_abort ();
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}
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