Mercurial > octave
annotate liboctave/util/action-container.h @ 29572:aef11bb4e6d1
use std::size_t and std::ptrdiff_t in C++ code (bug #60471)
Files affected: make_int.cc, file-editor-tab.cc, octave-qscintilla.cc,
Cell.cc, Cell.h, call-stack.cc, call-stack.h, cellfun.cc, data.cc,
debug.cc, dlmread.cc, error.cc, event-queue.h, fcn-info.cc,
fcn-info.h, file-io.cc, ft-text-renderer.cc, gl2ps-print.cc,
graphics.cc, graphics.in.h, help.cc, hex2num.cc, input.cc,
latex-text-renderer.cc, load-path.cc, load-save.cc, load-save.h,
ls-hdf5.cc, ls-mat-ascii.cc, ls-mat5.cc, ls-oct-text.cc, mex.cc,
mexproto.h, mxarray.h, oct-map.cc, oct-stream.cc, oct-stream.h,
pager.cc, pager.h, pr-output.cc, regexp.cc, settings.h,
stack-frame.cc, stack-frame.h, strfns.cc, syminfo.cc, symrec.h,
symscope.cc, symscope.h, symtab.cc, sysdep.cc, toplev.cc, utils.cc,
utils.h, variables.cc, __fltk_uigetfile__.cc, __init_fltk__.cc,
audioread.cc, gzip.cc, cdef-class.cc, cdef-manager.cc, cdef-method.cc,
cdef-object.cc, cdef-object.h, ov-base-diag.cc, ov-base-diag.h,
ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-scalar.h,
ov-base-sparse.h, ov-base.cc, ov-base.h, ov-cell.cc, ov-cell.h,
ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc,
ov-fcn-handle.cc, ov-java.cc, ov-lazy-idx.h, ov-perm.cc, ov-perm.h,
ov-range.h, ov-str-mat.cc, ov-struct.cc, ov-struct.h, ov-usr-fcn.cc,
ov-usr-fcn.h, ov.cc, ov.h, ovl.cc, octave.cc, bp-table.cc, jit-ir.cc,
jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.h, lex.h, lex.ll,
oct-lvalue.cc, oct-parse.yy, parse.h, profiler.h, pt-eval.cc,
pt-eval.h, pt-jit.cc, pt-jit.h, pt-pr-code.cc, pt-tm-const.cc,
pt-tm-const.h, Array.h, CMatrix.cc, DiagArray2.h, PermMatrix.h,
Sparse.h, dMatrix.cc, fCMatrix.cc, fMatrix.cc, bsxfun-defs.cc,
oct-fftw.cc, oct-fftw.h, randpoisson.cc, sparse-chol.cc,
mx-inlines.cc, file-ops.cc, lo-sysdep.cc, oct-env.cc, oct-time.cc,
action-container.cc, action-container.h, base-list.h, caseless-str.h,
cmd-edit.cc, cmd-hist.cc, data-conv.cc, data-conv.h, f77-fcn.h,
file-info.cc, file-info.h, kpse.cc, kpse.h, lo-cutils.h, lo-hash.h,
lo-regexp.cc, oct-base64.cc, oct-base64.h, oct-binmap.h, oct-glob.cc,
oct-shlib.cc, oct-shlib.h, oct-sort.cc, oct-sparse.h, oct-string.cc,
quit.cc, unwind-prot.h, url-transfer.cc, main.in.cc, mkoctfile.in.cc,
and shared-fcns.h.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 28 Apr 2021 22:57:42 -0400 |
parents | 7854d5752dd2 |
children | 32f4357ac8d9 |
rev | line source |
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27923
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1993-2021 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
15396 | 25 |
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26 #if ! defined (octave_action_container_h) |
15396 | 27 #define octave_action_container_h 1 |
28 | |
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29 #include "octave-config.h" |
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30 |
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31 #include <functional> |
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32 |
15396 | 33 // This class allows registering actions in a list for later |
34 // execution, either explicitly or when the container goes out of | |
35 // scope. | |
36 | |
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37 // FIXME: is there a better name for this class? |
15396 | 38 |
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39 namespace octave |
15396 | 40 { |
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41 class |
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42 action_container |
15396 | 43 { |
44 public: | |
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45 |
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46 // A generic unwind_protect element. Knows how to run itself and |
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47 // discard itself. Also, contains a pointer to the next element. |
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48 class elem |
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49 { |
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50 public: |
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51 |
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52 friend class action_container; |
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53 |
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54 elem (void) { } |
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55 |
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56 // No copying! |
15396 | 57 |
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58 elem (const elem&) = delete; |
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59 |
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60 elem& operator = (const elem&) = delete; |
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61 |
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62 virtual ~elem (void) = default; |
15396 | 63 |
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64 virtual void run (void) { } |
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65 }; |
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66 |
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67 // An element that merely runs a void (*)(void) function. |
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68 |
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69 class fcn_elem : public elem |
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70 { |
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71 public: |
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72 |
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73 // FIXME: Do we need to apply std::forward to the arguments to |
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74 // std::bind here? |
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75 |
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76 template <typename F, typename... Args> |
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77 fcn_elem (F&& fcn, Args&&... args) |
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78 : m_fcn (std::bind (fcn, args...)) |
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79 { } |
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80 |
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81 void run (void) { m_fcn (); } |
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82 |
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83 private: |
15396 | 84 |
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85 std::function<void (void)> m_fcn; |
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86 }; |
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87 |
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88 // An element that stores arbitrary variable, and restores it. |
15396 | 89 |
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90 template <typename T> |
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91 class restore_var_elem : public elem |
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92 { |
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93 public: |
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94 |
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95 restore_var_elem (T& ref, const T& val) |
27177 | 96 : m_ptr (&ref), m_val (val) { } |
15396 | 97 |
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98 // No copying! |
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99 |
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100 restore_var_elem (const restore_var_elem&) = delete; |
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102 restore_var_elem& operator = (const restore_var_elem&) = delete; |
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103 |
27177 | 104 void run (void) { *m_ptr = m_val; } |
15396 | 105 |
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106 private: |
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107 |
27177 | 108 T *m_ptr, m_val; |
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109 }; |
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110 |
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111 // Deletes a class allocated using new. |
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112 |
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113 template <typename T> |
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114 class delete_ptr_elem : public elem |
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115 { |
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116 public: |
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117 |
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118 delete_ptr_elem (T *ptr) |
27177 | 119 : m_ptr (ptr) { } |
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120 |
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121 // No copying! |
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122 |
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123 delete_ptr_elem (const delete_ptr_elem&) = delete; |
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124 |
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125 delete_ptr_elem operator = (const delete_ptr_elem&) = delete; |
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27177 | 127 void run (void) { delete m_ptr; } |
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128 |
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129 private: |
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130 |
27177 | 131 T *m_ptr; |
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132 }; |
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133 |
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134 action_container (void) { } |
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135 |
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136 // No copying! |
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137 |
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138 action_container (const action_container&) = delete; |
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139 |
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140 action_container& operator = (const action_container&) = delete; |
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142 virtual ~action_container (void) = default; |
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144 template <typename F, typename... Args> |
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145 void add (F&& fcn, Args&&... args) |
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146 { |
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147 add_action (new fcn_elem (std::forward<F> (fcn), |
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148 std::forward<Args> (args)...)); |
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149 } |
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151 // Use separate template types for function pointer parameter |
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152 // declarations and captured arguments so that differences in |
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153 // const are handled properly. |
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155 template <typename... Params, typename... Args> |
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156 void add_fcn (void (*fcn) (Params...), Args&&... args) |
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157 { |
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158 add_action (new fcn_elem (fcn, std::forward<Args> (args)...)); |
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159 } |
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161 template <typename T, typename... Params, typename... Args> |
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162 void add_method (T *obj, void (T::*method) (Params...), Args&&... args) |
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163 { |
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164 add_action (new fcn_elem (method, obj, std::forward<Args> (args)...)); |
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165 } |
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166 |
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167 template <typename T, typename... Params, typename... Args> |
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168 void add_method (T& obj, void (T::*method) (Params...), Args&&... args) |
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169 { |
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170 add_action (new fcn_elem (method, &obj, std::forward<Args> (args)...)); |
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171 } |
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172 |
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173 // Call to delete (T*). |
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174 |
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175 template <typename T> |
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176 void add_delete (T *obj) |
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177 { |
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178 add_action (new delete_ptr_elem<T> (obj)); |
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179 } |
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181 // Protect any variable. |
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182 template <typename T> |
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183 void protect_var (T& var) |
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184 { |
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185 add_action (new restore_var_elem<T> (var, var)); |
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186 } |
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188 // Protect any variable, value given. |
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189 template <typename T> |
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190 void protect_var (T& var, const T& val) |
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191 { |
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192 add_action (new restore_var_elem<T> (var, val)); |
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193 } |
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194 |
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195 operator bool (void) const { return ! empty (); } |
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197 virtual void run_first (void) = 0; |
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199 OCTAVE_API void run (std::size_t num); |
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201 void run (void) { run (size ()); } |
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203 virtual void discard_first (void) = 0; |
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205 void discard (std::size_t num) |
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206 { |
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207 if (num > size ()) |
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208 num = size (); |
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210 for (std::size_t i = 0; i < num; i++) |
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211 discard_first (); |
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212 } |
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214 void discard (void) { discard (size ()); } |
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216 virtual std::size_t size (void) const = 0; |
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218 bool empty (void) const { return size () == 0; } |
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219 |
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220 protected: |
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221 |
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222 virtual void add_action (elem *new_elem) = 0; |
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223 }; |
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224 } |
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226 #endif |