https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65706
Bug ID: 65706
Summary: [c++14] Pack expansion with variable template
incorrectly marked as invalid
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ldionne.2 at gmail dot com
The following code produces an error on GCC trunk:
------------------------------------------------------------------------------
void allow_expansion(...);
template <int i>
int vtemplate = i;
template <int ...i>
void f() {
allow_expansion(vtemplate<i>...);
}
template void f<>();
template void f<1>();
template void f<1, 2>();
------------------------------------------------------------------------------
Note that the three above statements trigger the same error.
The exact output is
› ~/code/gcc5/bin/g++ ~/code/hana/test/worksheet.cpp -std=c++1y
[...]: In function ‘void f()’:
[...]: error: expansion pattern ‘vtemplate<i>’ contains no argument packs
allow_expansion(vtemplate<i>...);
^
