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annotate src/pt-stmt.cc @ 8844:c84a5b6377c4

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better handling of end of script/function no-op command
author John W. Eaton <jwe@octave.org>
date Mon, 23 Feb 2009 12:55:32 -0500
parents b9ce57a309a3
children 35cd375d4bb3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996, 1997, 1999, 2000, 2001, 2002, 2003, 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 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <typeinfo>
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29
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30 #include "quit.h"
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31
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32 #include "defun.h"
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33 #include "error.h"
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34 #include "gripes.h"
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35 #include "ov.h"
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36 #include "oct-lvalue.h"
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37 #include "input.h"
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38 #include "pager.h"
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39 #include "pt-bp.h"
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40 #include "pt-cmd.h"
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41 #include "pt-id.h"
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42 #include "pt-idx.h"
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43 #include "pt-jump.h"
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44 #include "pt-pr-code.h"
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45 #include "pt-stmt.h"
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46 #include "pt-walk.h"
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47 #include "unwind-prot.h"
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48 #include "utils.h"
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49 #include "variables.h"
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50
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51 // A list of commands to be executed.
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52
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53 tree_statement::~tree_statement (void)
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54 {
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55 delete cmd;
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56 delete expr;
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57 delete comm;
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58 }
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59
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60 void
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61 tree_statement::set_print_flag (bool print_flag)
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62 {
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63 if (expr)
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64 expr->set_print_flag (print_flag);
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65 }
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66
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67 bool
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68 tree_statement::print_result (void)
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69 {
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70 return expr && expr->print_result ();
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71 }
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72
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73 void
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74 tree_statement::set_breakpoint (void)
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75 {
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76 if (cmd)
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77 cmd->set_breakpoint ();
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78 else if (expr)
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79 expr->set_breakpoint ();
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80 }
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81
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82 void
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83 tree_statement::delete_breakpoint (void)
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84 {
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85 if (cmd)
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86 cmd->delete_breakpoint ();
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87 else if (expr)
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88 expr->delete_breakpoint ();
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89 }
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90
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91 bool
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92 tree_statement::is_breakpoint (void) const
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93 {
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94 return cmd ? cmd->is_breakpoint () : (expr ? expr->is_breakpoint () : false);
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95 }
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96
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97 int
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98 tree_statement::line (void) const
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99 {
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100 return cmd ? cmd->line () : (expr ? expr->line () : -1);
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101 }
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102
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103 int
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104 tree_statement::column (void) const
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105 {
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106 return cmd ? cmd->column () : (expr ? expr->column () : -1);
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107 }
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108
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109 void
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110 tree_statement::echo_code (void)
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111 {
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112 tree_print_code tpc (octave_stdout, VPS4);
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113
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114 accept (tpc);
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115 }
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116
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117 bool
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118 tree_statement::is_end_of_fcn_or_script (void) const
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119 {
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120 bool retval = false;
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121
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122 if (cmd)
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123 {
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124 tree_no_op_command *no_op_cmd
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125 = dynamic_cast<tree_no_op_command *> (cmd);
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126
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127 if (no_op_cmd)
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128 retval = no_op_cmd->is_end_of_fcn_or_script ();
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129 }
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130
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131 return retval;
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132 }
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133
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134 tree_statement *
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135 tree_statement::dup (symbol_table::scope_id scope,
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136 symbol_table::context_id context)
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137 {
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138 tree_statement *new_stmt = new tree_statement ();
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139
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140 new_stmt->cmd = cmd ? cmd->dup (scope, context) : 0;
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141
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142 new_stmt->expr = expr ? expr->dup (scope, context) : 0;
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143
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144 new_stmt->comm = comm ? comm->dup () : 0;
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145
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146 return new_stmt;
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147 }
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148
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149 void
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150 tree_statement::accept (tree_walker& tw)
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151 {
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152 tw.visit_statement (*this);
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153 }
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154
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155 int
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156 tree_statement_list::set_breakpoint (int line)
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157 {
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158 tree_breakpoint tbp (line, tree_breakpoint::set);
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159 accept (tbp);
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160
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161 return tbp.get_line ();
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162 }
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163
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164 void
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165 tree_statement_list::delete_breakpoint (int line)
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166 {
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167 if (line < 0)
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168 {
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169 octave_value_list bp_lst = list_breakpoints ();
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170
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171 int len = bp_lst.length ();
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172
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173 for (int i = 0; i < len; i++)
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174 {
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175 tree_breakpoint tbp (i, tree_breakpoint::clear);
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176 accept (tbp);
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177 }
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178 }
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179 else
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180 {
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181 tree_breakpoint tbp (line, tree_breakpoint::clear);
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182 accept (tbp);
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183 }
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184 }
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185
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186 octave_value_list
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187 tree_statement_list::list_breakpoints (void)
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188 {
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189 tree_breakpoint tbp (0, tree_breakpoint::list);
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190 accept (tbp);
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191
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192 return tbp.get_list ();
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193 }
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194
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195 tree_statement_list *
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196 tree_statement_list::dup (symbol_table::scope_id scope,
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197 symbol_table::context_id context)
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198 {
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199 tree_statement_list *new_list = new tree_statement_list ();
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200
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201 new_list->function_body = function_body;
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202
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203 for (iterator p = begin (); p != end (); p++)
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204 {
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205 tree_statement *elt = *p;
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206
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207 new_list->append (elt ? elt->dup (scope, context) : 0);
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208 }
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209
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210 return new_list;
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211 }
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212
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213 void
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214 tree_statement_list::accept (tree_walker& tw)
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215 {
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216 tw.visit_statement_list (*this);
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217 }
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218
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219 /*
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220 ;;; Local Variables: ***
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221 ;;; mode: C++ ***
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222 ;;; End: ***
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223 */