Hi! Working virtually out of Beaker Island.
We already implement expansion statements that way, the following patch just adds a testcase for it. Tested on x86_64-linux and i686-linux, ok for trunk? 2025-11-17 Jakub Jelinek <[email protected]> * g++.dg/DRs/dr3061.C: New test. --- gcc/testsuite/g++.dg/DRs/dr3061.C.jj 2025-11-17 10:50:28.868144259 +0100 +++ gcc/testsuite/g++.dg/DRs/dr3061.C 2025-11-17 10:52:53.760201985 +0100 @@ -0,0 +1,18 @@ +// DR 3061 - Trailing comma in an expansion-init-list +// { dg-do compile { target c++11 } } +// { dg-options "" } + +#include <initializer_list> + +void +foo () +{ + for (int x : { 1, }) + ; + template for (int x : { 1, }) // { dg-warning "'template for' only available with" "" { target c++23_down } } + ; + for (int x : { , }) // { dg-error "expected primary-expression before ',' token" } + ; // { dg-error "unable to deduce" "" { target *-*-* } .-1 } + template for (int x : { , }) // { dg-warning "'template for' only available with" "" { target c++23_down } } + ; // { dg-error "expected primary-expression before ',' token" "" { target *-*-* } .-1 } +} Jakub
