syntax: fix for() loop quirks and variable scoping

 - Support `for (var x in ...)` syntax
 - Support `for (var i = 0; i < ...; i++)` syntax
 - Properly handle "for" loops without condition and increment expression
 - Reject for-in loops with invalid lhs

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/ast.h b/ast.h
index f65a91f..3466beb 100644
--- a/ast.h
+++ b/ast.h
@@ -56,6 +56,7 @@ struct ut_op {
 	uint16_t is_op:1;
 	uint16_t is_overflow:1;
 	uint16_t is_postfix:1;
+	uint16_t is_for_in:1;
 	uint32_t off;
 	struct json_object *val;
 	union {