https://gcc.gnu.org/g:2b2d3a135a43cbafadd8957e0b2543f38c390437
commit r14-9815-g2b2d3a135a43cbafadd8957e0b2543f38c390437 Author: Marek Polacek <pola...@redhat.com> Date: Fri Apr 5 13:40:33 2024 -0400 c++: add fixed test [PR91079] Fixed by r12-2975. PR c++/91079 DR 1881 gcc/testsuite/ChangeLog: * g++.dg/ext/is_std_layout5.C: New test. Diff: --- gcc/testsuite/g++.dg/ext/is_std_layout5.C | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/gcc/testsuite/g++.dg/ext/is_std_layout5.C b/gcc/testsuite/g++.dg/ext/is_std_layout5.C new file mode 100644 index 00000000000..875f3c0948d --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/is_std_layout5.C @@ -0,0 +1,13 @@ +// PR c++/91079 +// DR 1881 - Standard-layout classes and unnamed bit-fields +// { dg-do compile { target c++11 } } + +struct A { int a : 4; }; +struct B : A { int b : 3; }; +static_assert(__is_standard_layout(A), ""); +static_assert(!__is_standard_layout(B), ""); + +struct C { int : 0; }; +struct D : C { int : 0; }; +static_assert(__is_standard_layout(C), ""); +static_assert(!__is_standard_layout(D), "");