Add <c-g> to cancel current operation

The current implementation only does this during regex operations,
but should be extensible to other operations that might take a long
time by regularly calling EventManager::handle_urgent_events().

1 files changed, 5 insertions, 0 deletions

diff --git a/src/exception.hh b/src/exception.hh
index 0ff3d825..28f41029 100644
--- a/src/exception.hh
+++ b/src/exception.hh
@@ -29,6 +29,11 @@ struct failure : runtime_error
     using runtime_error::runtime_error;
 };
 
+struct cancel : runtime_error
+{
+    cancel() : runtime_error("cancellation requested") {}
+};
+
 struct logic_error : exception
 {
 };