-// -*- C++ -*-
-// Boost general library 'format' ---------------------------
-// See http://www.boost.org for updates, documentation, and revision history.
+// ----------------------------------------------------------------------------
+// format_class.hpp : class interface
+// ----------------------------------------------------------------------------
-// (C) Samuel Krempp 2001
-// krempp@crans.ens-cachan.fr
-// Permission to copy, use, modify, sell and
-// distribute this software is granted provided this copyright notice appears
-// in all copies. This software is provided "as is" without express or implied
-// warranty, and with no claim as to its suitability for any purpose.
+// Copyright Samuel Krempp 2003. Use, modification, and distribution are
+// subject to 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)
-// ideas taken from Rüdiger Loos's format class
-// and Karl Nelson's ofstream (also took its parsing code as basis for printf parsing)
+// See http://www.boost.org/libs/format for library home page
-// ------------------------------------------------------------------------------
-// format_class.hpp : class interface
-// ------------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
#ifndef BOOST_FORMAT_CLASS_HPP
#define BOOST_FORMAT_CLASS_HPP
#include <vector>
#include <string>
+#include <boost/optional.hpp> // to store locale when needed
+
#include <boost/format/format_fwd.hpp>
#include <boost/format/internals_fwd.hpp>
#include <boost/format/internals.hpp>
-#include <boost/format/outsstream.hpp>
+#include <boost/format/alt_sstream.hpp>
namespace boost {
- template<class Ch, class Tr>
+ template<class Ch, class Tr, class Alloc>
class basic_format
{
+ typedef typename io::CompatTraits<Tr>::compatible_type compat_traits;
public:
- typedef Ch CharT; // borland fails if we use Ch and Tr directly
- typedef Tr Traits; // in the body of the operator% template.
- typedef std::basic_string<Ch, Tr> string_t;
- typedef typename std::basic_string<Ch, Tr>::size_type size_type;
-
- typedef io::basic_outsstream<Ch, Tr> internal_stream_t;
+ typedef Ch CharT; // borland fails in operator% if we use Ch and Tr directly
+ typedef std::basic_string<Ch, Tr, Alloc> string_type;
+ typedef typename string_type::size_type size_type;
+ typedef io::detail::format_item<Ch, Tr, Alloc> format_item_t;
+ typedef io::basic_altstringbuf<Ch, Tr, Alloc> internal_streambuf_t;
+
explicit basic_format(const Ch* str=NULL);
- explicit basic_format(const string_t& s);
-#ifndef BOOST_NO_STD_LOCALE
- explicit basic_format(const Ch* str, const std::locale & loc);
- explicit basic_format(const string_t& s, const std::locale & loc);
-#endif
+ explicit basic_format(const string_type& s);
basic_format(const basic_format& x);
basic_format& operator= (const basic_format& x);
void swap(basic_format& x);
- basic_format& clear(); // empty all converted string buffers (except bound items)
+#if !defined(BOOST_NO_STD_LOCALE)
+ explicit basic_format(const Ch* str, const std::locale & loc);
+ explicit basic_format(const string_type& s, const std::locale & loc);
+#endif
+ io::detail::locale_t getloc() const;
+
+ basic_format& clear(); // empty all converted string buffers (except bound items)
basic_format& clear_binds(); // unbind all bound items, and call clear()
- basic_format& parse(const string_t&); // resets buffers and parse a new format string
+ basic_format& parse(const string_type&); // resets buffers and parse a new format string
+
+ // ** formatted result ** //
+ size_type size() const; // sum of the current string pieces sizes
+ string_type str() const; // final string
- // pass arguments through those operators :
+ // ** arguments passing ** //
template<class T>
basic_format& operator%(const T& x)
- { return io::detail::feed<CharT, Traits, const T&>(*this,x); }
+ { return io::detail::feed<CharT, Tr, Alloc, const T&>(*this,x); }
#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
template<class T> basic_format& operator%(T& x)
- { return io::detail::feed<CharT, Traits, T&>(*this,x); }
+ { return io::detail::feed<CharT, Tr, Alloc, T&>(*this,x); }
+#endif
+
+#if defined(__GNUC__)
+ // GCC can't handle anonymous enums without some help
+ // ** arguments passing ** //
+ basic_format& operator%(const int& x)
+ { return io::detail::feed<CharT, Tr, Alloc, const int&>(*this,x); }
+
+#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
+ basic_format& operator%(int& x)
+ { return io::detail::feed<CharT, Tr, Alloc, int&>(*this,x); }
#endif
- // modifying a format object
+#endif
+
+ // The total number of arguments expected to be passed to the format objectt
+ int expected_args() const
+ { return num_args_; }
+ // The number of arguments currently bound (see bind_arg(..) )
+ int bound_args() const;
+ // The number of arguments currently fed to the format object
+ int fed_args() const;
+ // The index (1-based) of the current argument (i.e. next to be formatted)
+ int cur_arg() const;
+ // The number of arguments still required to be fed
+ int remaining_args() const; // same as expected_args() - bound_args() - fed_args()
+
+
+ // ** object modifying **//
template<class T>
basic_format& bind_arg(int argN, const T& val)
{ return io::detail::bind_arg_body(*this, argN, val); }
basic_format& clear_bind(int argN);
template<class T>
basic_format& modify_item(int itemN, T manipulator)
- { return io::detail::modify_item_body<Ch,Tr,T> (*this, itemN, manipulator);}
+ { return io::detail::modify_item_body<Ch,Tr, Alloc, T> (*this, itemN, manipulator);}
// Choosing which errors will throw exceptions :
unsigned char exceptions() const;
unsigned char exceptions(unsigned char newexcept);
- // final output
- size_type size() const; // sum of the current string pieces sizes
- string_t str() const;
- friend BOOST_IO_STD basic_ostream<Ch, Tr>&
-#if BOOST_WORKAROUND( BOOST_MSVC, <= 1300)
- operator<< (BOOST_IO_STD basic_ostream<Ch, Tr>& , const basic_format& );
-#else
- operator<< <Ch, Tr> (BOOST_IO_STD basic_ostream<Ch, Tr>&, const basic_format&);
-#endif
-
#if !defined( BOOST_NO_MEMBER_TEMPLATE_FRIENDS ) \
&& !BOOST_WORKAROUND(__BORLANDC__, <= 0x570) \
- && !BOOST_WORKAROUND( _CRAYC, != 0)
+ && !BOOST_WORKAROUND( _CRAYC, != 0) \
+ && !BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
// use friend templates and private members only if supported
- template<class Ch2, class Tr2, class T> friend basic_format<Ch2, Tr2>&
- io::detail::feed(basic_format<Ch2,Tr2>&, T);
- template<class Ch2, class Tr2, class T> friend
- void io::detail::distribute(basic_format<Ch2,Tr2>&, T);
- template<class Ch2, class Tr2, class T> friend
- basic_format<Ch2, Tr2>& io::detail::modify_item_body(basic_format<Ch2, Tr2>&, int, T);
- template<class Ch2, class Tr2, class T> friend
- basic_format<Ch2, Tr2>& io::detail::bind_arg_body(basic_format<Ch2, Tr2>&, int, const T&);
+
+#ifndef BOOST_NO_TEMPLATE_STD_STREAM
+ template<class Ch2, class Tr2, class Alloc2>
+ friend std::basic_ostream<Ch2, Tr2> &
+ operator<<( std::basic_ostream<Ch2, Tr2> & ,
+ const basic_format<Ch2, Tr2, Alloc2>& );
+#else
+ template<class Ch2, class Tr2, class Alloc2>
+ friend std::ostream &
+ operator<<( std::ostream & ,
+ const basic_format<Ch2, Tr2, Alloc2>& );
+#endif
+
+ template<class Ch2, class Tr2, class Alloc2, class T>
+ friend basic_format<Ch2, Tr2, Alloc2>&
+ io::detail::feed (basic_format<Ch2, Tr2, Alloc2>&, T);
+
+ template<class Ch2, class Tr2, class Alloc2, class T> friend
+ void io::detail::distribute (basic_format<Ch2, Tr2, Alloc2>&, T);
+
+ template<class Ch2, class Tr2, class Alloc2, class T> friend
+ basic_format<Ch2, Tr2, Alloc2>&
+ io::detail::modify_item_body (basic_format<Ch2, Tr2, Alloc2>&, int, T);
+
+ template<class Ch2, class Tr2, class Alloc2, class T> friend
+ basic_format<Ch2, Tr2, Alloc2>&
+ io::detail::bind_arg_body (basic_format<Ch2, Tr2, Alloc2>&, int, const T&);
private:
#endif
- typedef BOOST_IO_STD basic_ostream<Ch, Tr> stream_t;
typedef io::detail::stream_format_state<Ch, Tr> stream_format_state;
- typedef io::detail::format_item<Ch, Tr> format_item_t;
// flag bits, used for style_
enum style_values { ordered = 1, // set only if all directives are positional
special_needs = 4 };
void make_or_reuse_data(std::size_t nbitems);// used for (re-)initialisation
+ // member data --------------------------------------------//
std::vector<format_item_t> items_; // each '%..' directive leads to a format_item
std::vector<bool> bound_; // stores which arguments were bound. size() == 0 || num_args
- int style_; // style of format-string : positional or not, etc
+
+ int style_; // style of format-string : positional or not, etc
int cur_arg_; // keep track of wich argument is current
int num_args_; // number of expected arguments
mutable bool dumped_; // true only after call to str() or <<
- string_t prefix_; // piece of string to insert before first item
- internal_stream_t oss_; // the internal stream.
+ string_type prefix_; // piece of string to insert before first item
unsigned char exceptions_;
+ internal_streambuf_t buf_; // the internal stream buffer.
+ boost::optional<io::detail::locale_t> loc_;
}; // class basic_format
} // namespace boost
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