From 7969d2b75ce969b985cf08ef159ffdb8f96ee30d Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Thu, 30 Jul 2015 17:24:28 -0400
Subject: [PATCH] Improved AST printing.

---
 peglib.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/peglib.h b/peglib.h
index f883c76..cc76946 100644
--- a/peglib.h
+++ b/peglib.h
@@ -2006,15 +2006,23 @@ struct AstPrint
         level_ += 1;
         for (auto i = 0; i < level_; i++) { std::cout << "  "; }
         if (ast.is_token) {
-            std::cout << "- " << ast.name << ": '" << ast.token << "'" << std::endl;
+            std::cout << "- " << name(ast) << ": '" << ast.token << "'" << std::endl;
         } else {
-            std::cout << "+ " << ast.name << std::endl;
+            std::cout << "+ " << name(ast) << std::endl;
         }
         for (auto node : ast.nodes) { print(*node); }
         level_ -= 1;
     }
 
 private:
+    std::string name(const Ast& ast) {
+        if (ast.name == ast.original_name) {
+            return ast.name;
+        } else {
+            return ast.original_name + " (" + ast.name + ")";
+        }
+    }
+
     int level_;
 };