[Boost-commit] svn:boost r66051 - in trunk/libs/spirit/test: . karma

Subject: [Boost-commit] svn:boost r66051 - in trunk/libs/spirit/test: . karma
From: hartmut.kaiser_at_[hidden]
Date: 2010-10-17 16:41:52

Author: hkaiser
Date: 2010-10-17 16:41:51 EDT (Sun, 17 Oct 2010)
New Revision: 66051
URL: http://svn.boost.org/trac/boost/changeset/66051

Log:
Spirit: fixed #4742 (Karma produces not the supposed output for a real number generator in scientific mode), added test
Added:
   trunk/libs/spirit/test/karma/real_scientific.cpp   (contents, props changed)
Text files modified: 
   trunk/libs/spirit/test/Jamfile |     1 +                                       
   1 files changed, 1 insertions(+), 0 deletions(-)

Modified: trunk/libs/spirit/test/Jamfile
==============================================================================
--- trunk/libs/spirit/test/Jamfile	(original)
+++ trunk/libs/spirit/test/Jamfile	2010-10-17 16:41:51 EDT (Sun, 17 Oct 2010)
@@ -161,6 +161,7 @@
     [ run karma/semantic_action_attribute.cpp : : : : ]
     [ compile qi/single_element_sequence_attribute.cpp : : qi_single_element_sequence_attribute ]
     [ compile qi/debug_optional.cpp           : : qi_debug_optional ]
+    [ run karma/real_scientific.cpp           : : : : ]
 
     ;
 

Added: trunk/libs/spirit/test/karma/real_scientific.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/test/karma/real_scientific.cpp	2010-10-17 16:41:51 EDT (Sun, 17 Oct 2010)
@@ -0,0 +1,40 @@
+//  Copyright (c) 2010 Lars Kielhorn
+//  Copyright (c) 2001-2010 Hartmut Kaiser
+// 
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying 
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/config/warning_disable.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/spirit/include/karma.hpp>
+
+#include <iostream>
+#include <string>
+#include <iterator>
+
+namespace karma = boost::spirit::karma;
+
+// define a new real number formatting policy
+template <typename Num>
+struct scientific_policy : karma::real_policies<Num>
+{
+    // we want the numbers always to be in scientific format
+    static int floatfield(Num n) { return std::ios_base::scientific; }
+};
+
+int main() 
+{
+    // define a new generator type based on the new policy
+    typedef karma::real_generator<double, scientific_policy<double> > 
+        science_type;
+    science_type const scientific = science_type();
+  
+    std::string output;
+    typedef std::back_insert_iterator<std::string> output_iterator;
+    output_iterator sink(output);
+  
+    // should output: 1.0e-01, but will output: 10.0e-02
+    BOOST_TEST(karma::generate(sink, scientific, 0.1) && output == "1.0e-01");
+
+    return boost::report_errors();
+};