169 lines
6.9 KiB
C++
169 lines
6.9 KiB
C++
// ----------------------------------------------------------------------------
|
|
// format_class.hpp : class interface
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// 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)
|
|
|
|
// See http://www.boost.org/libs/format for library home page
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#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/alt_sstream.hpp>
|
|
|
|
namespace boost {
|
|
|
|
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 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_type& s);
|
|
basic_format(const basic_format& x);
|
|
basic_format& operator= (const basic_format& x);
|
|
void swap(basic_format& x);
|
|
|
|
#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_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
|
|
|
|
// ** arguments passing ** //
|
|
template<class T>
|
|
basic_format& operator%(const T& 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, 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
|
|
#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, Alloc, T> (*this, itemN, manipulator);}
|
|
|
|
// Choosing which errors will throw exceptions :
|
|
unsigned char exceptions() const;
|
|
unsigned char exceptions(unsigned char newexcept);
|
|
|
|
#if !defined( BOOST_NO_MEMBER_TEMPLATE_FRIENDS ) \
|
|
&& !BOOST_WORKAROUND(__BORLANDC__, <= 0x570) \
|
|
&& !BOOST_WORKAROUND( _CRAYC, != 0) \
|
|
&& !BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
|
|
// use friend templates and private members only if supported
|
|
|
|
#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 io::detail::stream_format_state<Ch, Tr> stream_format_state;
|
|
// 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 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_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
|
|
|
|
|
|
#endif // BOOST_FORMAT_CLASS_HPP
|