minor implementation for parser

(simple type and defn)

include/ast_util.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "globals.h"
+
+
+void ast_node_add_child(ASTNode *parent, ASTNode *child);
+
+void ast_node_free(ASTNode *node);
+
+void ast_node_print(ASTNode *node, int depth);
+
+/*
+    NODE SPECIFIC FUNCTIONS
+*/
+
+ASTNode *ast_node_program();
+
+ASTNode *ast_node_defn(Token tok_val, ASTNode *type, ASTNode *id, ASTNode *expr);
+
+ASTNode *ast_node_type_simple(Token tok_id);
+
+ASTNode *ast_node_type_complex(Token tok_bracket, ASTNode *type_param, ASTNode *type_out);
+
+ASTNode *ast_node_type_param();
+
+ASTNode *ast_node_type_out();
+
+ASTNode *ast_node_type_star(Token tok_star);
+
+ASTNode *ast_node_type_void();
+
+ASTNode *ast_node_id(Token id);