From 0723bea947ef76206e1190c3f488d4bcf7b48c94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonathan=20M=C3=BCller?= <git@foonathan.net>
Date: Wed, 11 Oct 2017 17:11:27 +0200
Subject: [PATCH] Only generate line directive when necessary

---
 src/libclang/preprocessor.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/libclang/preprocessor.cpp b/src/libclang/preprocessor.cpp
index 7459933..0630979 100644
--- a/src/libclang/preprocessor.cpp
+++ b/src/libclang/preprocessor.cpp
@@ -198,8 +198,11 @@ namespace
 
         void set_line(unsigned line)
         {
-            *result_ += "#line " + std::to_string(line) + "\n";
-            cur_line_ = line;
+            if (cur_line_ != line)
+            {
+                *result_ += "#line " + std::to_string(line) + "\n";
+                cur_line_ = line;
+            }
         }
 
         void write_str(std::string str)