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.
28 lines
908 B
C
28 lines
908 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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int arr[1];
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extern int arr2[];
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void
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test ()
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{
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int (&r)[1] = const_cast<int(&)[1]>(arr);
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int (&r2)[] = const_cast<int(&)[]>(arr); // { dg-error "17:invalid .const_cast." }
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int (&r3)[1] = (int(&)[1]) arr;
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int (&r4)[] = (int(&)[]) arr;
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int (&r5)[1] = static_cast<int(&)[1]>(arr);
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int (&r6)[] = static_cast<int(&)[]>(arr);
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// Try c_cast_p.
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int(*p1)[] = (int(*)[]) &arr;
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int(*p2)[1] = (int(*)[]) &arr; // { dg-error "cannot convert" }
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int(*p3)[] = (int(*)[1]) &arr;
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int(*p4)[] = (int(*)[1]) &arr2;
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int(*p5)[] = (int(*)[]) (int(*)[1]) &arr;
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int(*p6)[] = (int(*)[1]) (int(*)[]) &arr;
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int(*p7)[] = static_cast<int(*)[]>(&arr);
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int(*p8)[] = static_cast<int(*)[1]>(&arr);
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int(*p9)[] = static_cast<int(*)[1]>(&arr2); // { dg-error "16:invalid .static_cast." }
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}
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