expr: Tell expressions what kind of expression they are

1 files changed, 4 insertions, 1 deletions

diff --git a/src/expr.c b/src/expr.c
index 5784220..db60e34 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -12,7 +12,9 @@
 #include "xregex.h"
 #include <string.h>
 
-struct bfs_expr *bfs_expr_new(struct bfs_ctx *ctx, bfs_eval_fn *eval_fn, size_t argc, char **argv) {
+struct bfs_expr *bfs_expr_new(struct bfs_ctx *ctx, bfs_eval_fn *eval_fn, size_t argc, char **argv, enum bfs_kind kind) {
+	bfs_assert(kind != BFS_PATH);
+
 	struct bfs_expr *expr = arena_alloc(&ctx->expr_arena);
 	if (!expr) {
 		return NULL;
@@ -22,6 +24,7 @@ struct bfs_expr *bfs_expr_new(struct bfs_ctx *ctx, bfs_eval_fn *eval_fn, size_t
 	expr->eval_fn = eval_fn;
 	expr->argc = argc;
 	expr->argv = argv;
+	expr->kind = kind;
 	expr->probability = 0.5;
 	SLIST_PREPEND(&ctx->expr_list, expr, freelist);