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I previously updated the assignment to correct the compile-time error, but the runtime check of values also needs to be updated for 16 bit wchar_t. Tested on powerpc-ibm-aix7.1.0.0. Committed. Thanks, David * g++.dg/cpp17/pr58708.C: Test appropriate value for size of wchar_t. Index: pr58708.C =================================================================== --- pr58708.C (revision 231582) +++ pr58708.C (working copy) @@ -50,8 +50,13 @@ #endif if (is_same<decltype(wfoo)::char_type, wchar_t>::value != true) __builtin_abort(); if (sizeof(wfoo.chars)/sizeof(wchar_t) != 2) __builtin_abort(); +#if __SIZEOF_WCHAR_T__ == 2 + if (wfoo.chars[0] != 258) __builtin_abort(); + if (wfoo.chars[1] != 772) __builtin_abort(); +#else if (wfoo.chars[0] != 16909060) __builtin_abort(); if (wfoo.chars[1] != 84281096) __builtin_abort(); +#endif auto foou = u"\x0102\x0304\x0506\x0708"_foo; if (is_same<decltype(foou)::char_type, char16_t>::value != true) __builtin_abort();
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