From 875c6e81e5ed52df46740083451380c4597b560c Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 24 Jul 2017 14:08:26 +0200
Subject: Optimize C/C++ lexer

---
 unit-tests/cc/lexer/driver.cxx | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

(limited to 'unit-tests/cc/lexer/driver.cxx')

diff --git a/unit-tests/cc/lexer/driver.cxx b/unit-tests/cc/lexer/driver.cxx
index 5803a88..53910a6 100644
--- a/unit-tests/cc/lexer/driver.cxx
+++ b/unit-tests/cc/lexer/driver.cxx
@@ -11,6 +11,7 @@
 #include <build2/cc/lexer.hxx>
 
 using namespace std;
+using namespace butl;
 
 namespace build2
 {
@@ -39,24 +40,16 @@ namespace build2
 
       try
       {
-        istream* is;
-
-        // Reading from file is several times faster.
-        //
-        ifdstream ifs;
+        ifdstream is;
         if (file != nullptr)
-        {
-          ifs.open (file);
-          is = &ifs;
-        }
+          is.open (file);
         else
         {
           file = "stdin";
-          cin.exceptions (istream::failbit | istream::badbit);
-          is = &cin;
+          is.open (fddup (stdin_fd ()));
         }
 
-        lexer l (*is, path (file));
+        lexer l (is, path (file));
 
         // No use printing eos since we will either get it or loop forever.
         //
-- 
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