On Tue, 15 Mar 2016, H.J. Lu wrote: > On Tue, Mar 15, 2016 at 3:34 PM, Joseph Myers <jos...@codesourcery.com> wrote: > > On Tue, 15 Mar 2016, H.J. Lu wrote: > > > >> On Tue, Mar 15, 2016 at 2:39 PM, Joseph Myers <jos...@codesourcery.com> > >> wrote: > >> > I'm not sure if the zero-size arrays (a GNU extension) are considered to > >> > make a struct non-empty, but in any case I think the tests should cover > >> > such arrays as elements of structs. > >> > >> There are couple tests for structs with members of array > >> of empty types. testsuite/g++.dg/abi/empty14.h has > > > > My concern is the other way round - structs with elements such as > > "int a[0];", an array [0] of a nonempty type. My reading of the subobject > > definition is that such an array should not cause the struct to be > > considered nonempty (it doesn't result in any int subobjects). > > This is a test for struct with zero-size array, which isn't treated > as empty type. C++ and C are compatible in its passing.
Where is the current definition of empty types you're proposing for use in GCC? Is the behavior of this case clear from that definition? -- Joseph S. Myers jos...@codesourcery.com
