58487c21b6
An array of an unknown bound is an incomplete type, so no object of such a type can be constructed. This means __is_constructible should always be false for an array of unknown bound. This patch also changes the std::is_default_constructible trait to use std::is_constructible, which now gives the right answer for arrays of unknown bound. gcc/cp: PR c++/90532 Ensure __is_constructible(T[]) is false * method.c (is_xible_helper): Return error_mark_node for construction of an array of unknown bound. gcc/testsuite: PR c++/90532 Ensure __is_constructible(T[]) is false * g++.dg/ext/90532.C: New test. libstdc++-v3: PR c++/90532 Ensure __is_constructible(T[]) is false * include/std/type_traits (__do_is_default_constructible_impl) (__is_default_constructible_atom, __is_default_constructible_safe): Remove. (is_default_constructible): Use is_constructible. * testsuite/20_util/is_constructible/value.cc: Check int[] case. * testsuite/20_util/is_default_constructible/value.cc: Likewise. * testsuite/20_util/is_trivially_constructible/value.cc: Likewise. * testsuite/20_util/is_trivially_default_constructible/value.cc: Likewise. From-SVN: r271412 |
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| value.cc | ||