1 files changed, 25 insertions, 0 deletions
diff --git a/src/visitor.c b/src/visitor.c
new file mode 100644
index 0000000..25296c1
--- /dev/null
+++ b/src/visitor.c
@@ -0,0 +1,25 @@
+#include "./include/visitor.h"
+#include "./include/hash_table.h"
+#include "./include/macros.h"
+#include "./include/stack.h"
+#include <stdlib.h>
+
+visitor_t *init_visitor(ast_t *root) {
+  visitor_t *v = (visitor_t *)malloc(sizeof(visitor_t));
+  if (v == NULL)
+    die("malloc on visitor");
+  v->stack_frame = init_stack(512);
+  v->symbol_table = init_hash_table(10000);
+  v->root = root;
+  return v;
+}
+
+bool is_self_evaluating(ast_t *e) {
+  if (e->type == AST_STRING || e->type == AST_INT || e->type == AST_FLOAT ||
+      e->type == AST_BOOL || e->type == AST_FUNCTION)
+    return true;
+
+  if (e->type == AST_PAIR && e->car == NULL && e->cdr == NULL)
+    return true;
+  return false;
+}