https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97234
Bug ID: 97234
Summary: Constexpr class-scope array initializer referencing
previous elements
Product: gcc
Version: 10.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: botond at mozilla dot com
Target Milestone: ---
The following code:
struct S {
static constexpr int rolling_sum[4]{
0,
rolling_sum[0] + 1,
rolling_sum[1] + 2,
rolling_sum[2] + 3
};
};
produces errors when compiled with g++ 10:
test.cpp:4:9: error: ‘rolling_sum’ was not declared in this scope
4 | rolling_sum[0] + 1,
| ^~~~~~~~~~~
test.cpp:5:9: error: ‘rolling_sum’ was not declared in this scope
5 | rolling_sum[1] + 2,
| ^~~~~~~~~~~
test.cpp:6:9: error: ‘rolling_sum’ was not declared in this scope
6 | rolling_sum[2] + 3
|
The code is accepted by clang. It's also accepted by gcc if the array is
declared at namespace scope, leading me to believe that rejecting it at class
scope is likely a bug.
