https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77547
Bug ID: 77547
Summary: rejects valid C++ code with designated initializer
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It is accepted by Clang. The same code is accepted if treated as C code or if
the two struct fields are swapped:
------------------
struct S
{
char *p, c;
} a = { .p = &a.c };
------------------
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160909 (experimental) [trunk revision 240043] (GCC)
$
$ g++-trunk -c small.cpp
small.cpp:4:19: sorry, unimplemented: non-trivial designated initializers not
supported
} a = { .p = &a.c };
^
$ clang++ -c small.cpp
$
$ gcc-trunk -c small.c
$
$ cat small.cpp
struct S
{
char c, *p;
} a = { .p = &a.c };
$
$ cat small.c
struct S
{
char c, *p;
} a = { .p = &a.c };
$
