commit 956b6c30219b56381cb0b3765859c60545327707
author Iain Sandoe <iain@sandoe.co.uk> Sat Jun 07 17:01:15 2025 +0100
committer Iain Sandoe <iain@sandoe.co.uk> Tue Jul 29 16:07:22 2025 +0100
tree fd38696488134556c620f624ba150055e7475e48
parent e25730c90a7bd90cb541b848d3c378d5fc713ef9

c++, coroutines: Ensure that the resumer is marked as can_throw.

We must flag that the resumer might throw (since the wrapping of the
original function body unconditionally adds a try-catch/rethrow). We
also add code that might throw - even when the original function body
would not.

TODO: We could improve code-gen by recognising cases where the combined
body + initial await expressions cannot throw and omitting the unneeded
try/catch/rethrow wrapper.

gcc/cp/ChangeLog:

	* coroutines.cc (build_actor_fn): Set can_throw.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
(cherry picked from commit e83c4bfc338fad0c87b2debb37ccfe98d148c7ac)