Bernhard, Thanks a lot for your comments.
> On May 19, 2023, at 7:11 PM, Bernhard Reutner-Fischer <rep.dot....@gmail.com> > wrote: > > On Fri, 19 May 2023 20:49:47 +0000 > Qing Zhao via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > >> GCC extension accepts the case when a struct with a flexible array member >> is embedded into another struct or union (possibly recursively). > > Do you mean TYPE_TRAILING_FLEXARRAY()? The following might be more accurate description: GCC extension accepts the case when a struct with a flexible array member is embedded into another struct or union (possibly recursively) as the last field. > >> diff --git a/gcc/tree.h b/gcc/tree.h >> index 0b72663e6a1..237644e788e 100644 >> --- a/gcc/tree.h >> +++ b/gcc/tree.h >> @@ -786,7 +786,12 @@ extern void omp_clause_range_check_failed (const_tree, >> const char *, int, >> (...) prototype, where arguments can be accessed with va_start and >> va_arg), as opposed to an unprototyped function. */ >> #define TYPE_NO_NAMED_ARGS_STDARG_P(NODE) \ >> - (TYPE_CHECK (NODE)->type_common.no_named_args_stdarg_p) >> + (FUNC_OR_METHOD_CHECK (NODE)->type_common.no_named_args_stdarg_p) >> + >> +/* True if this RECORD_TYPE or UNION_TYPE includes a flexible array member >> + at the last field recursively. */ >> +#define TYPE_INCLUDE_FLEXARRAY(NODE) \ >> + (RECORD_OR_UNION_CHECK (NODE)->type_common.no_named_args_stdarg_p) > > Until i read the description above i read TYPE_INCLUDE_FLEXARRAY as an > option to include or not include something. The description hints more > at TYPE_INCLUDES_FLEXARRAY (with an S) to be a type which has at least > one member which has a trailing flexible array or which itself has a > trailing flexible array. Yes, TYPE_INCLUDES_FLEXARRAY (maybe with a S is a better name) means the structure/union TYPE includes a flexible array member or includes a struct with a flexible array member as the last field. Hope this is clear. thanks. Qing > >> >> /* In an IDENTIFIER_NODE, this means that assemble_name was called with >> this string as an argument. */ >
