Support multi-level closure captures

Signed-off-by: Mel <mel@rnrd.eu>

1 files changed, 3 insertions, 0 deletions

diff --git a/boot/ir.c b/boot/ir.c
index f86d63f..af631f8 100644
--- a/boot/ir.c
+++ b/boot/ir.c
@@ -468,6 +468,9 @@ struct Function
     // synthetic structure containing all captured locals. (only stateful lambdas)
     Type_Id capture_state_type_id;
 
+    // for nested functions this is the enclosing function. nil for top-level.
+    struct Function* parent_function;
+
     // tree-side header which produced this function node.
     // required for synthesizing the closure type after function is lowered.
     struct Tree_Function_Header* ast_header;