https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90951
Bug ID: 90951
Summary: error initializing a constexpr array of a struct with
const member
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Here's another bug caused by my r270155. The valid code is accepted by Clang
and GCC 8 but rejected by GCC 9.1.0 and 10.0.
$ cat t.C && gcc -S -Wall t.C
struct S { const char a[2]; };
constexpr struct S a[1] = { { "" } };
static_assert ('\0' == *a[0].a, "!");
t.C:5:30: error: use of deleted function ‘S::S()’
5 | static_assert ('\0' == *a[0].a, "!");
| ^
t.C:1:8: note: ‘S::S()’ is implicitly deleted because the default definition
would be ill-formed:
1 | struct S { const char a[2]; };
| ^
t.C:1:8: error: uninitialized const member in ‘struct S’
t.C:1:23: note: ‘const char S::a [2]’ should be initialized
1 | struct S { const char a[2]; };
| ^
t.C:5:37: error: use of deleted function ‘S::S()’
5 | static_assert ('\0' == *a[0].a, "!");
| ^
t.C:5:21: error: non-constant condition for static assertion
5 | static_assert ('\0' == *a[0].a, "!");
| ~~~~~^~~~~~~~~~
t.C:5:21: error: use of deleted function ‘S::S()’
