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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_print_code_h) |
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25 #define octave_tree_print_code_h 1 |
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26 |
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27 #include <stack> |
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28 #include <string> |
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29 |
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30 #include "comment-list.h" |
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31 #include "pt-walk.h" |
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32 |
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33 class tree_expression; |
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34 |
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35 // How to print the code that the parse trees represent. |
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36 |
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37 class |
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38 tree_print_code : public tree_walker |
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39 { |
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40 public: |
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41 |
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42 tree_print_code (std::ostream& os_arg, |
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43 const std::string& pfx = std::string (), |
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44 bool pr_orig_txt = true) |
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45 : os (os_arg), prefix (pfx), nesting (), |
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46 print_original_text (pr_orig_txt), |
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47 curr_print_indent_level (0), beginning_of_line (true), |
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48 printing_newlines (true) |
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49 { |
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50 // For "none". |
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51 nesting.push ('n'); |
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52 } |
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53 |
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54 ~tree_print_code (void) { } |
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55 |
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56 void visit_anon_fcn_handle (tree_anon_fcn_handle&); |
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57 |
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58 void visit_argument_list (tree_argument_list&); |
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59 |
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60 void visit_binary_expression (tree_binary_expression&); |
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61 |
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62 void visit_break_command (tree_break_command&); |
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63 |
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64 void visit_colon_expression (tree_colon_expression&); |
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65 |
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66 void visit_continue_command (tree_continue_command&); |
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67 |
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68 void visit_decl_command (tree_decl_command&); |
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69 |
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70 void visit_decl_elt (tree_decl_elt&); |
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71 |
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72 void visit_decl_init_list (tree_decl_init_list&); |
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73 |
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74 void visit_simple_for_command (tree_simple_for_command&); |
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75 |
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76 void visit_complex_for_command (tree_complex_for_command&); |
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77 |
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78 void visit_octave_user_function (octave_user_function&); |
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79 |
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80 void visit_octave_user_function_header (octave_user_function&); |
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81 |
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82 void visit_octave_user_function_trailer (octave_user_function&); |
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83 |
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84 void visit_identifier (tree_identifier&); |
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85 |
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86 void visit_if_clause (tree_if_clause&); |
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87 |
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88 void visit_if_command (tree_if_command&); |
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89 |
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90 void visit_if_command_list (tree_if_command_list&); |
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91 |
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92 void visit_index_expression (tree_index_expression&); |
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93 |
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94 void visit_matrix (tree_matrix&); |
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95 |
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96 void visit_cell (tree_cell&); |
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97 |
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98 void visit_multi_assignment (tree_multi_assignment&); |
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99 |
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100 void visit_no_op_command (tree_no_op_command&); |
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101 |
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102 void visit_constant (tree_constant&); |
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103 |
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104 void visit_fcn_handle (tree_fcn_handle&); |
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105 |
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106 void visit_parameter_list (tree_parameter_list&); |
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107 |
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108 void visit_postfix_expression (tree_postfix_expression&); |
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109 |
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110 void visit_prefix_expression (tree_prefix_expression&); |
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111 |
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112 void visit_return_command (tree_return_command&); |
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113 |
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114 void visit_return_list (tree_return_list&); |
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115 |
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116 void visit_simple_assignment (tree_simple_assignment&); |
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117 |
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118 void visit_statement (tree_statement&); |
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119 |
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120 void visit_statement_list (tree_statement_list&); |
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121 |
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122 void visit_switch_case (tree_switch_case&); |
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123 |
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124 void visit_switch_case_list (tree_switch_case_list&); |
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125 |
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126 void visit_switch_command (tree_switch_command&); |
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127 |
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128 void visit_try_catch_command (tree_try_catch_command&); |
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129 |
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130 void visit_unwind_protect_command (tree_unwind_protect_command&); |
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131 |
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132 void visit_while_command (tree_while_command&); |
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133 |
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134 void visit_do_until_command (tree_do_until_command&); |
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135 |
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136 void suspend_newline (void) { printing_newlines = false; } |
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137 |
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138 void resume_newline (void) { printing_newlines = true; } |
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139 |
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140 private: |
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141 |
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142 std::ostream& os; |
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143 |
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144 std::string prefix; |
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145 |
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146 std::stack<char> nesting; |
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147 |
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148 bool print_original_text; |
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149 |
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150 // Current indentation. |
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151 int curr_print_indent_level; |
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152 |
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153 // TRUE means we are at the beginning of a line. |
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154 bool beginning_of_line; |
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155 |
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156 // TRUE means we are printing newlines and indenting. |
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157 bool printing_newlines; |
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158 |
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159 void reset_indent_level (void) { curr_print_indent_level = 0; } |
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160 |
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161 void increment_indent_level (void) { curr_print_indent_level += 2; } |
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162 |
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163 void decrement_indent_level (void) { curr_print_indent_level -= 2; } |
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164 |
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165 void newline (const char *alt_txt = ", "); |
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166 |
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167 void indent (void); |
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168 |
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169 void reset (void); |
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170 |
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171 void print_parens (const tree_expression& expr, const char *txt); |
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172 |
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173 void print_comment_list (octave_comment_list *comment_list); |
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174 |
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175 void print_comment_elt (const octave_comment_elt& comment_elt); |
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176 |
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177 void print_indented_comment (octave_comment_list *comment_list); |
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178 |
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179 // Must create with an output stream! |
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180 |
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181 tree_print_code (void); |
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182 |
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183 // No copying! |
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184 |
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185 tree_print_code (const tree_print_code&); |
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186 |
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187 tree_print_code& operator = (const tree_print_code&); |
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188 }; |
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189 |
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190 #endif |
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191 |
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192 /* |
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193 ;;; Local Variables: *** |
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194 ;;; mode: C++ *** |
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195 ;;; End: *** |
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196 */ |
