https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85305
Bug ID: 85305
Summary: Parameter pack expression in lambda capture list fails
as part of a fold expression
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vittorio.romeo at outlook dot com
Target Milestone: ---
The following code snippet...
template <int... Is>
void foo()
{
([i = Is]{}(), ...);
}
...does not compile on gcc trunk 20180408 with the following error:
<source>: In function 'void foo()':
<source>:4:11: error: parameter packs not expanded with '...':
([i = Is]{}(), ...);
^~
<source>:4:11: note: 'Is'
<source>:4:16: error: operand of fold expression has no unexpanded
parameter packs
([i = Is]{}(), ...);
~~~~~~~~~~^~
Live example on godbolt.org:
https://godbolt.org/g/YBk6L6
