From: dannyh_at_[hidden]
Date: 2007-06-03 18:58:44
Author: dannyh
Date: 2007-06-03 18:58:43 EDT (Sun, 03 Jun 2007)
New Revision: 4424
URL: http://svn.boost.org/trac/boost/changeset/4424
Log:
fixed 'stream << "null"' issue.
Text files modified:
sandbox/explore/boost/explore/explore.hpp | 33 ++++++++++++++++++---------------
1 files changed, 18 insertions(+), 15 deletions(-)
Modified: sandbox/explore/boost/explore/explore.hpp
==============================================================================
--- sandbox/explore/boost/explore/explore.hpp (original)
+++ sandbox/explore/boost/explore/explore.hpp 2007-06-03 18:58:43 EDT (Sun, 03 Jun 2007)
@@ -321,7 +321,7 @@
{
if( NULL == item )
{
- return stream << "null";
+ return stream << (char *)"null";
}
//
// DH - changed until we figure out what special things to do with pointer types
@@ -342,6 +342,22 @@
}
};
+ /**
+ * This is the main entrance to print.
+ * This function tries to stream it's first argument (the item) to the stream given as a second argument.
+ * If the item has no stream operator, print will try to treat it as some form of container and call itself recursively
+ * on every element of the container.
+ *
+ * Print ask the container policy whether to treat the item as a container. If directed so, it will delegate to the
+ * print_container free function in namespace scope.
+ * Otherwise, it will try to stream the item using the expression "stream << item".
+ *
+ * \param &item the item to stream
+ * \param &stream the stream that receives the item or its elements
+ * \param &format the format to use (string escaping, delimiters etc.)
+ * \param &policy a type that decides when a type needs to be treated as a container.
+ * \return the original stream (second argument)
+ */
template< typename format_type,
typename container_policy_type ,
typename item_type
@@ -391,23 +407,10 @@
}
-// Danny, this doesn't appear to work. When I call print passing in a stringstream, this
-// is the function that gets called. When printing a streamed type, the type is always streamed
-// to cout since that is what this defaults the stream to and format is never used. With
-// containers the build fails since stringstream isn't a valid format. I haven't really had a
-// chance to look into why this happens yet. --Jared
-/* template < typename item_type,
- typename format_type>
- std::ostream &print( const item_type &item, const format_type &format)
- {
- return print( item, std::cout, format, default_container_policy());
- }
-*/
-
//
// The container_formatter type to allow "inline" streaming like the following
//
- // std::cout << container_format( my_formatter) % my_container1 % my_container2 << ...
+ // std::cout << container_format( my_formatter) % my_container1 << ...
//
template< typename container, typename formatter>