From b5d1112072c4dec74751fdf4d40a0dba96524770 Mon Sep 17 00:00:00 2001
From: chrchr-github <78114321+chrchr-github@users.noreply.github.com>
Date: Tue, 12 Sep 2023 14:21:51 +0200
Subject: [PATCH] Fix #314 TokenList::lastLine() is slow for long lines (#319)

---
 simplecpp.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/simplecpp.cpp b/simplecpp.cpp
index e98ecc61..1f572fda 100755
--- a/simplecpp.cpp
+++ b/simplecpp.cpp
@@ -1362,14 +1362,18 @@ std::string simplecpp::TokenList::lastLine(int maxsize) const
         if (++count > maxsize)
             return "";
         if (!ret.empty())
-            ret.insert(0, 1, ' ');
+            ret += ' ';
+        // add tokens in reverse for performance reasons
         if (tok->str()[0] == '\"')
-            ret.insert(0, "%str%");
+            ret += "%rts%"; // %str%
         else if (tok->number)
-            ret.insert(0, "%num%");
-        else
-            ret.insert(0, tok->str());
+            ret += "%mun%"; // %num%
+        else {
+            ret += tok->str();
+            std::reverse(ret.end() - tok->str().length(), ret.end());
+        }
     }
+    std::reverse(ret.begin(), ret.end());
     return ret;
 }