[Boost-commit] svn:boost r66560 - trunk/libs/spirit/example/qi

Subject: [Boost-commit] svn:boost r66560 - trunk/libs/spirit/example/qi
From: hartmut.kaiser_at_[hidden]
Date: 2010-11-13 15:26:27

Author: hkaiser
Date: 2010-11-13 15:26:22 EST (Sat, 13 Nov 2010)
New Revision: 66560
URL: http://svn.boost.org/trac/boost/changeset/66560

Log:
Spirit: Adding new example
Added:
   trunk/libs/spirit/example/qi/unescaped_string.cpp   (contents, props changed)
Text files modified: 
   trunk/libs/spirit/example/qi/Jamfile |     2 ++                                      
   1 files changed, 2 insertions(+), 0 deletions(-)

Modified: trunk/libs/spirit/example/qi/Jamfile
==============================================================================
--- trunk/libs/spirit/example/qi/Jamfile	(original)
+++ trunk/libs/spirit/example/qi/Jamfile	2010-11-13 15:26:22 EST (Sat, 13 Nov 2010)
@@ -37,6 +37,8 @@
 exe display_attribute_type : display_attribute_type.cpp ;
 exe adapt_template_struct : adapt_template_struct.cpp ;
 
+exe unescaped_string : unescaped_string.cpp ;
+
 exe calculator1 : calc1.cpp ;
 exe calculator2 : calc2.cpp ;
 exe calculator2_ast : calc2_ast.cpp ;

Added: trunk/libs/spirit/example/qi/unescaped_string.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/example/qi/unescaped_string.cpp	2010-11-13 15:26:22 EST (Sat, 13 Nov 2010)
@@ -0,0 +1,72 @@
+//  Copyright (c) 2010 Jeroen Habraken
+// 
+//  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>
+
+#include <iostream>
+#include <ostream>
+#include <string>
+
+namespace client
+{
+    namespace qi = boost::spirit::qi;
+
+    template <typename InputIterator>
+    struct unescaped_string
+        : qi::grammar<InputIterator, std::string(char const*)>
+    {
+        unescaped_string()
+            : unescaped_string::base_type(unesc_str)
+        {
+            unesc_char.add("\\a", '\a')("\\b", '\b')("\\f", '\f')("\\n", '\n')
+                          ("\\r", '\r')("\\t", '\t')("\\v", '\v')("\\\\", '\\')
+                          ("\\\'", '\'')("\\\"", '\"')
+                ;
+            
+            unesc_str = qi::lit(qi::_r1)
+                    >> *(unesc_char | qi::alnum | "\\x" >> qi::hex)
+                    >>  qi::lit(qi::_r1)
+                ;
+        }
+
+        qi::rule<InputIterator, std::string(char const*)> unesc_str;
+        qi::symbols<char const, char const> unesc_char;
+    };
+
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//  Main program
+///////////////////////////////////////////////////////////////////////////////
+int main()
+{
+    namespace qi = boost::spirit::qi;
+    
+    typedef std::string::const_iterator iterator_type;
+
+    std::string parsed;
+
+    std::string str("'''string\\x20to\\x20unescape\\x3a\\x20\\n\\r\\t\\\"\\'\\x41'''");
+    char const* quote = "'''";
+
+    iterator_type iter = str.begin();
+    iterator_type end = str.end();
+
+    client::unescaped_string<iterator_type> p;
+    if (!qi::parse(iter, end, p(quote), parsed))
+    {
+        std::cout << "-------------------------\n";
+        std::cout << "Parsing failed\n";
+        std::cout << "-------------------------\n";
+    }
+    else
+    {
+        std::cout << "-------------------------\n";
+        std::cout << "Parsed: " << parsed << "\n";
+        std::cout << "-------------------------\n";
+    }
+ 
+    return 0;
+}