aboutsummaryrefslogtreecommitdiff
path: root/nix/boost/format/format_class.hpp
blob: 6875623acb47464afa7db1f9675b20ff72722966 (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
// -*- C++ -*-
//  Boost general library 'format'   ---------------------------
//  See http://www.boost.org for updates, documentation, and revision history.

//  (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.

// ideas taken from Rüdiger Loos's format class
// and Karl Nelson's ofstream (also took its parsing code as basis for printf parsing)

// ------------------------------------------------------------------------------
// format_class.hpp :  class interface
// ------------------------------------------------------------------------------


#ifndef BOOST_FORMAT_CLASS_HPP
#define BOOST_FORMAT_CLASS_HPP

#include <vector>
#include <string>

#include <boost/format/format_fwd.hpp>
#include <boost/format/internals_fwd.hpp>

#include <boost/format/internals.hpp>

namespace boost {

class basic_format 
{
public:
  typedef std::string                string_t;
  typedef BOOST_IO_STD ostringstream internal_stream_t;
private:
  typedef BOOST_IO_STD ostream       stream_t;
  typedef io::detail::stream_format_state  stream_format_state;
  typedef io::detail::format_item          format_item_t;

public:
  basic_format(const char* str);
  basic_format(const string_t& s);
#ifndef BOOST_NO_STD_LOCALE
  basic_format(const char* str, const std::locale & loc);
  basic_format(const string_t& s, const std::locale & loc);
#endif // no locale
  basic_format(const basic_format& x);
  basic_format& operator= (const basic_format& x);

  basic_format& clear(); // empty the string buffers (except bound arguments, see clear_binds() )

  // pass arguments through those operators :
  template<class T>  basic_format&   operator%(const T& x) 
  { 
    return io::detail::feed<const T&>(*this,x);
  }

#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
  template<class T>  basic_format&   operator%(T& x) 
  {
    return io::detail::feed<T&>(*this,x);
  }
#endif


  // system for binding arguments :
  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);
  basic_format&         clear_binds();

  // modify the params of a directive, by applying a manipulator :
  template<class T> 
  basic_format&  modify_item(int itemN, const T& manipulator) 
  {
    return io::detail::modify_item_body(*this, itemN, manipulator) ;
  }

  // Choosing which errors will throw exceptions :
  unsigned char exceptions() const;
  unsigned char exceptions(unsigned char newexcept);

  // final output
  string_t str() const;
  friend BOOST_IO_STD ostream& 
  operator<< ( BOOST_IO_STD ostream& , const basic_format& ); 
                      

  template<class T>  friend basic_format&  
  io::detail::feed(basic_format&, T);
    
  template<class T>  friend   
  void io::detail::distribute(basic_format&, T);
  
  template<class T>  friend
  basic_format&  io::detail::modify_item_body(basic_format&, int, const T&);

  template<class T> friend
  basic_format&  io::detail::bind_arg_body(basic_format&, int, const T&);

// make the members private only if the friend templates are supported
private:

  // flag bits, used for style_
  enum style_values  { ordered = 1,        // set only if all directives are  positional directives
                       special_needs = 4 };     

  // parse the format string :
  void parse(const string_t&);

  int                           style_;         // style of format-string :  positional or not, etc
  int                           cur_arg_;       // keep track of wich argument will come
  int                           num_args_;      // number of expected arguments
  mutable bool                  dumped_;        // true only after call to str() or <<
  std::vector<format_item_t>    items_;         // vector of directives (aka items)
  string_t                      prefix_;        // piece of string to insert before first item

  std::vector<bool>             bound_;         // stores which arguments were bound
                                                //   size = num_args OR zero
  internal_stream_t             oss_;           // the internal stream.
  stream_format_state           state0_;        // reference state for oss_
  unsigned char                 exceptions_;
}; // class basic_format


} // namespace boost


#endif // BOOST_FORMAT_CLASS_HPP
msg-tooltip'>This reduces resident memory for PID 1 from 29.8MiB to 28.7MiB right after boot on a bare-bones system (x86_64-linux). * gnu/services/shepherd.scm (scm->go): New procedure. (shepherd-configuration-file)[config]: Call it and use 'load-compiled' instead of 'primitive-load'. Ludovic Courtès