[Boost-commit] svn:boost r71269 - trunk/libs/spirit/example/qi

Subject: [Boost-commit] svn:boost r71269 - trunk/libs/spirit/example/qi
From: hartmut.kaiser_at_[hidden]
Date: 2011-04-15 07:19:45

Author: hkaiser
Date: 2011-04-15 07:19:43 EDT (Fri, 15 Apr 2011)
New Revision: 71269
URL: http://svn.boost.org/trac/boost/changeset/71269

Log:
Spirit: fixing/adding examples
Added:
   trunk/libs/spirit/example/qi/german_floating_point.cpp   (contents, props changed)
Text files modified: 
   trunk/libs/spirit/example/qi/calc_utree_ast.cpp |     4 ++--                                    
   1 files changed, 2 insertions(+), 2 deletions(-)

Modified: trunk/libs/spirit/example/qi/calc_utree_ast.cpp
==============================================================================
--- trunk/libs/spirit/example/qi/calc_utree_ast.cpp	(original)
+++ trunk/libs/spirit/example/qi/calc_utree_ast.cpp	2011-04-15 07:19:43 EDT (Fri, 15 Apr 2011)
@@ -35,7 +35,7 @@
 
     struct expr
     {
-        template <typename T1, typename T2>
+        template <typename T1, typename T2 = void>
         struct result { typedef void type; };
 
         expr(char op) : op(op) {}
@@ -58,7 +58,7 @@
 
     struct negate_expr
     {
-        template <typename T1, typename T2>
+        template <typename T1, typename T2 = void>
         struct result { typedef void type; };
 
         void operator()(spirit::utree& expr, spirit::utree const& rhs) const

Added: trunk/libs/spirit/example/qi/german_floating_point.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/example/qi/german_floating_point.cpp	2011-04-15 07:19:43 EDT (Fri, 15 Apr 2011)
@@ -0,0 +1,48 @@
+//  Copyright (c) 2001-2011 Hartmut Kaiser
+//  Copyright (c) 2011 Michael Caisse
+// 
+//  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/spirit/include/qi.hpp>
+
+namespace qi = boost::spirit::qi;
+
+template <typename T>
+struct german_real_policies : qi::real_policies<T>
+{
+   template <typename Iterator>
+   static bool parse_dot(Iterator& first, Iterator const& last)
+   {
+       if (first == last || *first != ',')
+           return false;
+       ++first;
+       return true;
+   }
+};
+
+qi::real_parser<double, german_real_policies<double> > const german_double;
+
+///////////////////////////////////////////////////////////////////////////////
+int main()
+{
+    std::string input("123,456");
+    std::string::iterator begin = input.begin();
+    std::string::iterator end = input.end();
+
+    double value = 0;
+    if (!qi::parse(begin, end, german_double, value))
+    {
+        std::cout << "-------------------------------- \n";
+        std::cout << "Parsing failed\n";
+        std::cout << "-------------------------------- \n";
+    }
+    else
+    {
+        std::cout << "-------------------------------- \n";
+        std::cout << "Parsing succeeded, got: " << value << "\n";
+        std::cout << "---------------------------------\n";
+    }
+    return 0;
+}
+