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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2006, 2007 |
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4 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_stmt_h) |
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25 #define octave_tree_stmt_h 1 |
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26 |
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27 class octave_value_list; |
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28 |
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29 class tree_command; |
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30 class tree_expression; |
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31 |
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32 class tree_walker; |
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33 |
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34 #include "base-list.h" |
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35 #include "comment-list.h" |
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36 |
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37 // A statement is either a command to execute or an expression to |
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38 // evaluate. |
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39 |
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40 class |
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41 tree_statement |
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42 { |
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43 public: |
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44 |
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45 tree_statement (void) |
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46 : cmd (0), expr (0), comm (0), print_flag (true) { } |
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47 |
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48 tree_statement (tree_command *c, octave_comment_list *cl) |
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49 : cmd (c), expr (0), comm (cl), print_flag (true) { } |
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50 |
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51 tree_statement (tree_expression *e, octave_comment_list *cl) |
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52 : cmd (0), expr (e), comm (cl), print_flag (true) { } |
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53 |
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54 ~tree_statement (void); |
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55 |
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56 void set_print_flag (bool print) { print_flag = print; } |
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57 |
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58 bool is_command (void) { return cmd != 0; } |
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59 |
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60 bool is_expression (void) { return expr != 0; } |
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61 |
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62 int line (void); |
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63 int column (void); |
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64 |
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65 void maybe_echo_code (bool in_function_body); |
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66 |
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67 bool print_result (void) { return print_flag; } |
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68 |
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69 tree_command *command (void) { return cmd; } |
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70 |
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71 octave_value_list eval (bool silent, int nargout, bool in_function_body); |
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72 |
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73 tree_expression *expression (void) { return expr; } |
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74 |
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75 octave_comment_list *comment_text (void) { return comm; } |
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76 |
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77 // Allow modification of this statement. Note that there is no |
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78 // checking. If you use these, are you sure you knwo what you are |
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79 // doing? |
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80 |
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81 void set_command (tree_command *c) { cmd = c; } |
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82 |
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83 void set_expression (tree_expression *e) { expr = e; } |
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84 |
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85 tree_statement *dup (symbol_table *sym_tab); |
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86 |
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87 void accept (tree_walker& tw); |
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88 |
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89 private: |
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90 |
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91 // Only one of cmd or expr can be valid at once. |
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92 |
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93 // Command to execute. |
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94 tree_command *cmd; |
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95 |
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96 // Expression to evaluate. |
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97 tree_expression *expr; |
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98 |
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99 // Comment associated with this statement. |
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100 octave_comment_list *comm; |
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101 |
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102 // Print result of eval for this command? |
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103 bool print_flag; |
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104 |
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105 // No copying! |
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106 tree_statement (const tree_statement&); |
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107 |
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108 tree_statement& operator = (const tree_statement&); |
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109 }; |
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110 |
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111 // A list of statements to evaluate. |
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112 |
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113 class |
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114 tree_statement_list : public octave_base_list<tree_statement *> |
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115 { |
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116 public: |
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117 |
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118 tree_statement_list (void) |
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119 : function_body (false) { } |
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120 |
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121 tree_statement_list (tree_statement *s) |
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122 : function_body (false) { append (s); } |
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123 |
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124 ~tree_statement_list (void) |
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125 { |
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126 while (! empty ()) |
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127 { |
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128 iterator p = begin (); |
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129 delete *p; |
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130 erase (p); |
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131 } |
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132 } |
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133 |
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134 void mark_as_function_body (void) { function_body = true; } |
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135 |
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136 octave_value_list eval (bool silent = false, int nargout = 0); |
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137 |
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138 int set_breakpoint (int line); |
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139 |
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140 void delete_breakpoint (int line); |
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141 |
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142 octave_value_list list_breakpoints (void); |
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143 |
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144 tree_statement_list *dup (symbol_table *sym_tab); |
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145 |
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146 void accept (tree_walker& tw); |
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147 |
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148 private: |
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149 |
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150 // Does this list of statements make up the body of a function? |
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151 bool function_body; |
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152 |
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153 // No copying! |
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154 |
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155 tree_statement_list (const tree_statement_list&); |
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156 |
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157 tree_statement_list& operator = (const tree_statement_list&); |
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158 }; |
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159 |
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160 // Pointer to the current statement being executed. |
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161 extern tree_statement *curr_statement; |
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162 |
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163 // Pointer to the current statement being executed in the calling function. |
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164 extern tree_statement *curr_caller_statement; |
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165 |
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166 #endif |
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167 |
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168 /* |
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169 ;;; Local Variables: *** |
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170 ;;; mode: C++ *** |
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171 ;;; End: *** |
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172 */ |
