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annotate libinterp/corefcn/hook-fcn.h @ 20654:b65888ec820e draft default tip gccjit

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dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents 4197fc428c7d
children
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1 /*
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2
19731
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3 Copyright (C) 2013-2015 John W. Eaton
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4
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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 the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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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 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if !defined (octave_hook_fcn_h)
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24 #define octave_hook_fcn_h 1
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25
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26 #include <string>
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27
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28 #include "oct-obj.h"
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29 #include "ov.h"
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30 #include "ov-fcn-handle.h"
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31 #include "parse.h"
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32 #include "variables.h"
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33
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34 class
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35 base_hook_function
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36 {
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37 public:
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38
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39 friend class hook_function;
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40
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41 base_hook_function (void) : count (1) { }
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42
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43 base_hook_function (const base_hook_function&) : count (1) { }
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44
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45 virtual ~base_hook_function (void) { }
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46
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47 virtual std::string id (void) { return std::string (); }
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48
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49 virtual bool is_valid (void) { return false; }
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50
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51 virtual void eval (const octave_value_list&) { }
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52
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53 protected:
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54
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55 size_t count;
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56 };
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57
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58 class
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59 hook_function
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60 {
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61 public:
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62
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63 hook_function (void)
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64 {
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65 static base_hook_function nil_rep;
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66 rep = &nil_rep;
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67 rep->count++;
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68 }
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69
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70 hook_function (const octave_value& f,
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71 const octave_value& d = octave_value ());
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72
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73 ~hook_function (void)
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74 {
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75 if (--rep->count == 0)
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76 delete rep;
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77 }
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78
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79 hook_function (const hook_function& hf)
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80 : rep (hf.rep)
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81 {
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82 rep->count++;
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83 }
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84
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85 hook_function& operator = (const hook_function& hf)
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86 {
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87 if (rep != hf.rep)
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88 {
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89 if (--rep->count == 0)
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90 delete rep;
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91
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92 rep = hf.rep;
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93 rep->count++;
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94 }
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95
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96 return *this;
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97 }
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98
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99 std::string id (void) { return rep->id (); }
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100
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101 bool is_valid (void) { return rep->is_valid (); }
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102
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103 void eval (const octave_value_list& initial_args)
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104 {
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105 rep->eval (initial_args);
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106 }
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107
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108 private:
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109
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110 base_hook_function *rep;
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111 };
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112
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113 class
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114 named_hook_function : public base_hook_function
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115 {
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116 public:
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117
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118 named_hook_function (const std::string& n, const octave_value& d)
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119 : name (n), data (d)
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120 { }
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121
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122 void eval (const octave_value_list& initial_args)
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123 {
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124 octave_value_list args = initial_args;
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125
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126 if (data.is_defined ())
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127 args.append (data);
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128
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129 feval (name, args, 0);
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130 }
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131
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132 std::string id (void) { return name; }
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133
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134 bool is_valid (void) { return is_valid_function (name); }
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135
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136 private:
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137
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138 std::string name;
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139
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140 octave_value data;
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141 };
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142
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143 class
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144 fcn_handle_hook_function : public base_hook_function
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145 {
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146 public:
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147
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148 fcn_handle_hook_function (const octave_value& fh_arg, const octave_value& d)
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149 : ident (), valid (false), fcn_handle (fh_arg), data (d)
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150 {
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151 octave_fcn_handle *fh = fcn_handle.fcn_handle_value (true);
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152
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153 if (fh)
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154 {
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155 valid = true;
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156
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157 std::ostringstream buf;
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158 buf << fh;
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159 ident = fh->fcn_name () + ":" + buf.str ();
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160 }
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161 }
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162
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163 void eval (const octave_value_list& initial_args)
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164 {
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165 octave_value_list args = initial_args;
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166
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167 if (data.is_defined ())
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168 args.append (data);
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169
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170 fcn_handle.do_multi_index_op (0, args);
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171 }
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172
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173 std::string id (void) { return ident; }
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174
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175 bool is_valid (void) { return valid; }
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176
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177 private:
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178
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179 std::string ident;
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180
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181 bool valid;
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182
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183 octave_value fcn_handle;
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184
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185 octave_value data;
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186 };
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187
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188 class
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189 hook_function_list
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190 {
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191 public:
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192
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193 typedef std::map<std::string, hook_function> map_type;
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194
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195 typedef map_type::iterator iterator;
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196 typedef map_type::const_iterator const_iterator;
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197
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198 hook_function_list (void) : fcn_map () { }
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199
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200 ~hook_function_list (void) { }
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201
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202 hook_function_list (const hook_function_list& lst)
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203 : fcn_map (lst.fcn_map)
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204 { }
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205
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206 hook_function_list& operator = (const hook_function_list& lst)
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207 {
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208 if (&lst != this)
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209 fcn_map = lst.fcn_map;
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210
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211 return *this;
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212 }
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213
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214 bool empty (void) const { return fcn_map.empty (); }
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215
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216 void clear (void) { fcn_map.clear (); }
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217
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218 void insert (const std::string& id, const hook_function& f)
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219 {
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220 fcn_map[id] = f;
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221 }
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222
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223 iterator find (const std::string& id)
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224 {
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225 return fcn_map.find (id);
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226 }
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227
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228 const_iterator find (const std::string& id) const
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229 {
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230 return fcn_map.find (id);
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231 }
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232
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233 iterator end (void) { return fcn_map.end (); }
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234
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235 const_iterator end (void) const { return fcn_map.end (); }
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236
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237 void erase (iterator p) { fcn_map.erase (p); }
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238
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239 void run (const octave_value_list& initial_args = octave_value_list ())
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240 {
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241 iterator p = fcn_map.begin ();
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242
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243 while (p != fcn_map.end ())
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244 {
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245 std::string hook_fcn_id = p->first;
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246 hook_function hook_fcn = p->second;
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247
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248 iterator q = p++;
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249
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250 if (hook_fcn.is_valid ())
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251 hook_fcn.eval (initial_args);
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252 else
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253 fcn_map.erase (q);
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254 }
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255 }
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256
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257 private:
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258
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259 map_type fcn_map;
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260 };
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261
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262 #endif