https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90847
Bug ID: 90847
Summary: requested alignment is not an integer constant
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: zhonghao at pku dot org.cn
Target Milestone: ---
My gcc is 10.0.0, and the code is:
template <int N>
void test() {
constexpr int N2 = N;
typedef int T alignas(N2);
// error: requested alignment is not an integer constant
}
int main() {
test<4>();
return 0;
}
gcc accepts the code. clang rejects it:
source>:4:16: error: 'alignas' attribute only applies to variables, data
members and tag types
typedef int T alignas(N2);
^
1 error generated.
Compiler returned: 1
icc gives a warning:
<source>(4): warning #3463: alignas does not apply here
typedef int T alignas(N2);
^
Compiler returned: 0
