https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89239
Bug ID: 89239
Summary: gcc claims that this expression is not constexpr
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: n.eugene536 at gmail dot com
Target Milestone: ---
Can't compile the following code:
enum E { e };
constexpr bool arr[1][1] = {{true}};
template<E x, E y>
void check() {
static_assert(arr[x][y], "");
}
int main() {
check<e, e>();
}
gcc says:
a.cpp: In instantiation of ‘void check() [with A x = (A)0; A y = (A)0]’:
a.cpp:11:17: required from here
a.cpp:7:28: error: non-constant condition for static assertion
static_assert(sz[x][y] == false, "");
a.cpp:7:28: error: accessing value of ‘sz’ through a ‘const bool’ glvalue in a
constant expression
g++ --version:
g++ (Ubuntu 8.2.0-7ubuntu1) 8.2.0
