annotate libinterp/corefcn/input.h @ 27528:e51284fc0a51

eliminate promptflag from the lexer and input reader classes We can use a much simpler method for determining whether to display the primary or secondary prompt. * input.h (base_reader::m_pflag): Delete member variable and all uses. (base_reader::increment_promptflag, base_reader::decrement_promptflag, base_reader::promptflag): Delete member functions and all uses. (input_reader::increment_promptflag, input_reader::decrement_promptflag, input_reader::promptflag): Delete member functions and all uses. * interpreter.cc (interpreter::main_loop): For push parser, use primary prompt on initial call for input, secondary prompt if parser/lexer is asking for additional input. * lex.h, lex.ll (base_lexer::increment_promptflag, base_lexer::decrement_promptflag, base_lexer::promptflag): Delete member functions and all uses. (lexer::m_initial_input): New variable. (lexer::reset): Also reset m_initial_input. (lexer::fill_flex_buffer): Use primary prompt on initial call for input, secondary prompt if parser/lexer is asking for additional input. * parse.h (base_parser::increment_promptflag, base_parser::decrement_promptflag, base_parser::promptflag): Delete member functions and all uses.
author John W. Eaton <jwe@octave.org>
date Fri, 18 Oct 2019 11:06:11 -0400
parents 73be3c628eac
children 6971bc1a2f92
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1 /*
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2
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3 Copyright (C) 1993-2019 John W. Eaton
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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21 */
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23 // Use the GNU readline library for command line editing and hisory.
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24
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25 #if ! defined (octave_input_h)
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26 #define octave_input_h 1
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28 #include "octave-config.h"
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29
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30 #include <cstdio>
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32 #include <memory>
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33 #include <string>
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35 #include "hook-fcn.h"
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36 #include "oct-time.h"
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37 #include "ovl.h"
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38 #include "pager.h"
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40 // TRUE after a call to completion_matches.
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41 extern bool octave_completion_matches_called;
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43 // TRUE if the plotting system has requested a call to drawnow at
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44 // the next user prompt.
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45 extern OCTINTERP_API bool Vdrawnow_requested;
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47 // TRUE if we are not executing a command direct from debug> prompt.
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48 extern OCTINTERP_API bool Vtrack_line_num;
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50 extern octave::sys::time Vlast_prompt_time;
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52 class octave_value;
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54 namespace octave
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55 {
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56 class interpreter;
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57
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58 class input_system
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59 {
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60 public:
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61
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62 input_system (interpreter& interp);
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63
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64 void initialize (bool line_editing);
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65
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66 octave_value PS1 (const octave_value_list& args, int nargout);
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67
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68 std::string PS1 (void) const { return m_PS1; }
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70 std::string PS1 (const std::string& s)
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71 {
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72 std::string val = m_PS1;
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73 m_PS1 = s;
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74 return val;
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75 }
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77 void set_PS1 (const std::string& s) { m_PS1 = s; }
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78
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79 octave_value PS2 (const octave_value_list& args, int nargout);
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80
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81 std::string PS2 (void) const { return m_PS2; }
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82
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83 std::string PS2 (const std::string& s)
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84 {
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85 std::string val = m_PS2;
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86 m_PS2 = s;
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87 return val;
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88 }
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89
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90 void set_PS2 (const std::string& s) { m_PS2 = s; }
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91
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92 std::string last_debugging_command (void) const
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93 {
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94 return m_last_debugging_command;
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95 }
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96
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97 std::string last_debugging_command (const std::string& s)
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98 {
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99 std::string val = m_last_debugging_command;
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100 m_last_debugging_command = s;
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101 return val;
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102 }
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103
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104 octave_value
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105 completion_append_char (const octave_value_list& args, int nargout);
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106
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107 char completion_append_char (void) const
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108 {
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109 return m_completion_append_char;
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110 }
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111
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112 char completion_append_char (char c)
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113 {
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114 char val = m_completion_append_char;
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115 m_completion_append_char = c;
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116 return val;
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117 }
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118
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119 void set_completion_append_char (char c) { m_completion_append_char = c; }
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120
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121 octave_value gud_mode (const octave_value_list& args, int nargout);
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122
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123 bool gud_mode (void) const { return m_gud_mode; }
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124
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125 bool gud_mode (bool flag)
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126 {
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127 bool val = m_gud_mode;
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128 m_gud_mode = flag;
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129 return val;
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130 }
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131
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132 void set_gud_mode (bool flag) { m_gud_mode = flag; }
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133
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134 octave_value mfile_encoding (const octave_value_list& args, int nargout);
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135
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136 std::string mfile_encoding (void) const { return m_mfile_encoding; }
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137
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138 std::string mfile_encoding (const std::string& s)
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139 {
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140 std::string val = m_mfile_encoding;
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141 m_mfile_encoding = s;
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142 return val;
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143 }
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144
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145 void set_mfile_encoding (const std::string& s) { m_mfile_encoding = s; }
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146
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147 bool yes_or_no (const std::string& prompt);
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148
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149 std::string interactive_input (const std::string& s, bool& eof);
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150
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151 octave_value_list
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152 get_user_input (const octave_value_list& args, int nargout);
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153
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154 bool have_input_event_hooks (void) const;
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155
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156 void add_input_event_hook (const hook_function& hook_fcn);
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157
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158 bool remove_input_event_hook (const std::string& hook_fcn_id);
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159
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160 void clear_input_event_hooks (void);
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161
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162 void run_input_event_hooks (void);
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163
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164 private:
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165
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166 interpreter& m_interpreter;
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167
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168 // Primary prompt string.
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169 std::string m_PS1;
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170
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171 // Secondary prompt string.
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172 std::string m_PS2;
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173
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174 // Character to append after successful command-line completion
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175 // attempts.
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176 char m_completion_append_char;
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177
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178 // TRUE if we are running in the Emacs GUD mode.
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179 bool m_gud_mode;
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180
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181 // Codepage which is used to read .m files
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182 std::string m_mfile_encoding;
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183
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184 // If we are in debugging mode, this is the last command entered,
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185 // so that we can repeat the previous command if the user just
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186 // types RET.
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187 std::string m_last_debugging_command;
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188
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189 hook_function_list m_input_event_hook_functions;
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190
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191 std::string gnu_readline (const std::string& s, bool& eof) const;
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192 };
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193
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194 class base_reader
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195 {
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196 public:
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197
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198 friend class input_reader;
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199
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200 base_reader (interpreter& interp)
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201 : m_interpreter (interp)
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202 { }
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203
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204 base_reader (const base_reader& x)
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205 : m_interpreter (x.m_interpreter)
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206 { }
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207
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208 virtual ~base_reader (void) = default;
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209
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210 virtual std::string get_input (const std::string& prompt, bool& eof) = 0;
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211
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212 virtual std::string input_source (void) const { return s_in_src; }
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213
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214 std::string octave_gets (const std::string& prompt, bool& eof);
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215
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216 virtual bool input_from_terminal (void) const { return false; }
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217
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218 virtual bool input_from_file (void) const { return false; }
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219
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220 virtual bool input_from_eval_string (void) const { return false; }
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221
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222 protected:
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223
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224 interpreter& m_interpreter;
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225
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226 private:
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227
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228 static const std::string s_in_src;
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229 };
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230
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231 class input_reader
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232 {
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233 public:
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234
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235 input_reader (interpreter& interp);
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236
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237 input_reader (interpreter& interp, FILE *file);
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238
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239 input_reader (interpreter& interp, const std::string& str);
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240
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241 input_reader (const input_reader& ir) = default;
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242
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243 input_reader& operator = (const input_reader& ir) = default;
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244
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245 ~input_reader (void) = default;
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246
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247 std::string get_input (const std::string& prompt, bool& eof)
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248 {
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249 return m_rep->get_input (prompt, eof);
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250 }
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251
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252 std::string input_source (void) const
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253 {
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254 return m_rep->input_source ();
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255 }
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256
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257 bool input_from_terminal (void) const
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258 {
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259 return m_rep->input_from_terminal ();
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260 }
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261
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262 bool input_from_file (void) const
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263 {
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264 return m_rep->input_from_file ();
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265 }
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266
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267 bool input_from_eval_string (void) const
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268 {
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269 return m_rep->input_from_eval_string ();
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270 }
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271
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272 private:
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273
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274 std::shared_ptr<base_reader> m_rep;
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275 };
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276 }
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277
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278 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)
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279
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280 OCTAVE_DEPRECATED (5, "use 'octave::input_system::yes_or_no' instead")
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281 extern bool octave_yes_or_no (const std::string& prompt);
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282
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283 OCTAVE_DEPRECATED (5, "use 'octave::input_system::clear_input_event_hooks' instead")
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284 extern void remove_input_event_hook_functions (void);
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285
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286 OCTAVE_DEPRECATED (5, "this function will be removed in a future version of Octave")
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287 extern OCTINTERP_API FILE * get_input_from_stdin (void);
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288
1
78fd87e624cb [project @ 1993-08-08 01:13:40 by jwe]
jwe
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289 #endif
25407
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290
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291 #endif