refactor(ast): one file per ast_type -- UNSTABLE (3)

src/utils/ast/ast.c

@@ -2,7 +2,22 @@
 
 #include <stdbool.h>
 
-static struct ast *ast_create(enum ast_type type, void *data)
+void ast_free(struct ast *node)
+{
+    if (node == NULL)
+        return;
+    // ast void does not need to be freed.
+    if (ast_is_if(node))
+        ast_free_if(ast_get_if(node));
+    else if (ast_is_command(node))
+        ast_free_command(ast_get_command(node));
+    else if (ast_is_list(node))
+        ast_free_list(ast_get_list(node));
+
+    free(node);
+}
+
+struct ast *ast_create(enum ast_type type, void *data)
 {
     struct ast *node = malloc(sizeof(struct ast));
     if (!node)