https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95086
Bug ID: 95086
Summary: brace initialization in captures doesn't work with
function calls
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nico at josuttis dot de
Target Milestone: ---
AFAIK, since C++17 we should be able to do:
[&coll{std::as_const(vec)}] {}
but it doesn't compile:
prog.cc: In function 'int main()':
prog.cc:10:44: error:
cannot capture '{std::as_const<std::vector<int> >(vec)}' by reference
10 | [&coll{std::as_const(vec)}] { // ERROR???
| ^
However, both using = for the initialization:
[&coll = std::as_const(vec)] {
and for simple initializations using braces:
[max{42}] {
work fine.
Other compilers do it as I expect.
It seems to be a problem when reference captures are initialized by function
calls (or other expressions).
See
https://wandbox.org/permlink/LMSfQ1nLszVHQ4LF
