1 files changed, 6 insertions, 0 deletions
diff --git a/src/expr.h b/src/expr.h
index 7bcace7..60b298d 100644
--- a/src/expr.h
+++ b/src/expr.h
@@ -244,4 +244,10 @@ bool bfs_expr_cmp(const struct bfs_expr *expr, long long n);
  */
 void bfs_expr_clear(struct bfs_expr *expr);
 
+/**
+ * Iterate over the children of an expression.
+ */
+#define for_expr(child, expr) \
+	for (struct bfs_expr *child = bfs_expr_children(expr); child; child = child->next)
+
 #endif // BFS_EXPR_H