From 052b3db77fef930439fa6421b5cc897d22da6ca0 Mon Sep 17 00:00:00 2001
From: Steven Watanabe <steven@providere-consulting.com>
Date: Wed, 9 Jun 2010 17:45:24 +0000
Subject: [PATCH] Make reading a tuple work with std::noskipws.  Fixes #1920

[SVN r62678]
---
 include/boost/tuple/tuple_io.hpp | 4 ++++
 test/io_test.cpp                 | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/include/boost/tuple/tuple_io.hpp b/include/boost/tuple/tuple_io.hpp
index 10cdb1c..06a2339 100644
--- a/include/boost/tuple/tuple_io.hpp
+++ b/include/boost/tuple/tuple_io.hpp
@@ -384,6 +384,8 @@ extract_and_check_delimiter(
     if (is.good() && c!=d) {
       is.setstate(std::ios::failbit);
     } 
+  } else {
+    is >> std::ws;
   }
   return is;
 }
@@ -478,6 +480,8 @@ extract_and_check_delimiter(
     if (is.good() && c!=d) { 
       is.setstate(std::ios::failbit);
     }
+  } else {
+    is >> std::ws;
   }
   return is;
 }
diff --git a/test/io_test.cpp b/test/io_test.cpp
index cf6dfb0..95babe3 100644
--- a/test/io_test.cpp
+++ b/test/io_test.cpp
@@ -120,6 +120,13 @@ int test_main(int argc, char * argv[] ) {
   is3 >> set_close(']');
   BOOST_CHECK(bool(is3 >> ti2));
 
+  // Make sure that whitespace between elements
+  // is skipped.
+  useThisIStringStream is4("(100 200 300)"); 
+   
+  BOOST_CHECK(bool(is4 >> std::noskipws >> ti1));
+  BOOST_CHECK(ti1 == make_tuple(100, 200, 300));
+
   // Note that strings are problematic:
   // writing a tuple on a stream and reading it back doesn't work in
   // general. If this is wanted, some kind of a parseable string class