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annotate src/pt-cmd.h @ 7715:5b4d278ec828

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parse scripts completely before executing
author John W. Eaton <jwe@octave.org>
date Wed, 16 Apr 2008 15:09:56 -0400
parents 745a8299c2b5
children 71f068b22fcc
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1 /*
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2
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3 Copyright (C) 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2004, 2005,
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4 2006, 2007 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #if !defined (octave_tree_cmd_h)
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25 #define octave_tree_cmd_h 1
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26
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27 #include <string>
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28
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29 class tree_walker;
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30
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31 #include "ov-fcn.h"
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32 #include "pt.h"
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33 #include "pt-bp.h"
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34 #include "symtab.h"
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35
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36 // A base class for commands.
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37
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38 class
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39 tree_command : public tree
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40 {
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41 public:
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42
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43 tree_command (int l = -1, int c = -1)
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44 : tree (l, c) { }
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45
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46 virtual ~tree_command (void) { }
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47
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48 virtual void eval (void) = 0;
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49
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50 virtual tree_command *dup (symbol_table::scope_id) = 0;
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51
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52 private:
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53
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54 // No copying!
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55
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56 tree_command (const tree_command&);
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57
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58 tree_command& operator = (const tree_command&);
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59 };
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60
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61 // No-op.
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62
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63 class
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64 tree_no_op_command : public tree_command
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65 {
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66 public:
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67
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68 tree_no_op_command (const std::string& cmd = "no_op", int l = -1, int c = -1)
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69 : tree_command (l, c), orig_cmd (cmd) { }
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70
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71 ~tree_no_op_command (void) { }
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72
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73 void eval (void) { MAYBE_DO_BREAKPOINT; }
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74
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75 tree_command *dup (symbol_table::scope_id scope);
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76
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77 void accept (tree_walker& tw);
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78
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79 std::string original_command (void) { return orig_cmd; }
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81 private:
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82
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83 std::string orig_cmd;
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84
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85 // No copying!
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86
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87 tree_no_op_command (const tree_no_op_command&);
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88
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89 tree_no_op_command& operator = (const tree_no_op_command&);
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90 };
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91
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92 // Function definition.
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93
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94 class
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95 tree_function_def : public tree_command
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96 {
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97 public:
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98
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99 tree_function_def (octave_function *f, int l = -1, int c = -1)
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100 : tree_command (l, c), fcn (f) { }
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101
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102 ~tree_function_def (void) { }
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103
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104 void eval (void);
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105
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106 tree_command *dup (symbol_table::scope_id scope);
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107
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108 void accept (tree_walker& tw);
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109
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110 octave_function *function (void) { return fcn.function_value (); }
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111
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112 private:
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113
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114 octave_value fcn;
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115
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116 tree_function_def (const octave_value& v, int l = -1, int c = -1)
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117 : tree_command (l, c), fcn (v) { }
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118
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119 // No copying!
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120
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121 tree_function_def (const tree_function_def&);
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122
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123 tree_function_def& operator = (const tree_function_def&);
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124 };
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125
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126 #endif
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127
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128 /*
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129 ;;; Local Variables: ***
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130 ;;; mode: C++ ***
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131 ;;; End: ***
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132 */