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annotate libinterp/parse-tree/pt-decl.h @ 23457:21baad6b35c4

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maint: Use C++11 nullptr rather than 0 or NULL when possible. * FigureWindow.h, Logger.cc, Menu.cc, MouseModeActionGroup.h, Object.h, ObjectFactory.cc, ObjectProxy.h, color-picker.h, documentation-dock-widget.h, files-dock-widget.h, find-files-dialog.h, history-dock-widget.h, file-editor-tab.cc, file-editor.cc, file-editor.h, find-dialog.h, main-window.cc, main-window.h, octave-dock-widget.h, parser.cc, parser.h, webinfo.h, resource-manager.cc, shortcut-manager.cc, shortcut-manager.h, terminal-dock-widget.h, welcome-wizard.cc, welcome-wizard.h, workspace-model.h, workspace-view.h, __magick_read__.cc, call-stack.cc, call-stack.h, cdisplay.c, display.cc, dlmread.cc, dynamic-ld.cc, ft-text-renderer.cc, gl2ps-print.cc, graphics.cc, graphics.in.h, input.h, interpreter.cc, interpreter.h, ls-hdf5.cc, mex.cc, mxarray.in.h, oct-errno.in.cc, oct-fstrm.cc, oct-iostrm.h, oct-procbuf.cc, oct-stdstrm.h, oct-stream.cc, oct-stream.h, octave-link.cc, pager.cc, pr-output.cc, profiler.h, qz.cc, sighandlers.cc, strfns.cc, symtab.cc, symtab.h, typecast.cc, urlwrite.cc, variables.cc, __eigs__.cc, __init_fltk__.cc, __ode15__.cc, colamd.cc, ov-base-int.cc, ov-base.cc, ov-bool-mat.cc, ov-bool-sparse.cc, ov-builtin.cc, ov-class.cc, ov-classdef.cc, ov-complex.cc, ov-cx-diag.cc, ov-cx-mat.cc, ov-cx-sparse.cc, ov-fcn-handle.cc, ov-fcn-inline.cc, ov-flt-complex.cc, ov-flt-cx-diag.cc, ov-flt-cx-mat.cc, ov-flt-re-diag.cc, ov-flt-re-mat.cc, ov-java.cc, ov-java.h, ov-lazy-idx.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-re-mat.cc, ov-re-sparse.cc, ov-str-mat.cc, ov-struct.cc, ov-usr-fcn.h, octave.cc, octave.h, bp-table.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, lex.h, pt-arg-list.cc, pt-arg-list.h, pt-array-list.h, pt-cell.h, pt-classdef.h, pt-colon.cc, pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.h, pt-idx.h, pt-jit.cc, pt-jit.h, pt-loop.h, pt-mat.h, pt-select.h, pt.h, CSparse.cc, dSparse.cc, DASPK.cc, DASRT.cc, DASSL.cc, oct-fftw.cc, oct-rand.cc, oct-spparms.cc, child-list.cc, file-ops.cc, mach-info.cc, oct-env.cc, oct-time.cc, cmd-edit.cc, cmd-hist.cc, oct-locbuf.cc, oct-shlib.cc, pathsearch.cc, singleton-cleanup.cc, unwind-prot.h, url-transfer.cc: Use C++11 nullptr rather than 0 or NULL when possible.
author Rik <rik@octave.org>
date Fri, 28 Apr 2017 13:19:12 -0700
parents cd4e1ee28716
children 2699c5974844
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rev   line source
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1 /*
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2
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3 Copyright (C) 1996-2017 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
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License 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, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (octave_pt_decl_h)
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24 #define octave_pt_decl_h 1
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25
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26 #include "octave-config.h"
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27
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28 #include <string>
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29
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30 #include "base-list.h"
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31 #include "oct-lvalue.h"
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32 #include "pt-cmd.h"
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33 #include "pt-id.h"
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34 #include "pt-walk.h"
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35 #include "symtab.h"
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36
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37 namespace octave
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38 {
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39 class tree_evaluator;
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40 class tree_expression;
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41 class tree_identifier;
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42
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43 // List of expressions that make up a declaration statement.
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44
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45 class tree_decl_elt
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46 {
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47 public:
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48
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49 tree_decl_elt (tree_identifier *i = nullptr, tree_expression *e = nullptr)
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50 : id (i), expr (e) { }
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51
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52 // No copying!
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53
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54 tree_decl_elt (const tree_decl_elt&) = delete;
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55
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56 tree_decl_elt& operator = (const tree_decl_elt&) = delete;
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57
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58 ~tree_decl_elt (void);
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59
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60 bool is_defined (void) { return id ? id->is_defined () : false; }
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61
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62 bool is_variable (void) { return id ? id->is_variable () : false; }
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63
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64 void mark_as_formal_parameter (void)
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65 {
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66 if (id)
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67 id->mark_as_formal_parameter ();
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68 }
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69
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70 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; }
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72 octave_lvalue lvalue (tree_evaluator *tw)
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73 {
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74 return id ? id->lvalue (tw) : octave_lvalue ();
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75 }
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76
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77 tree_identifier * ident (void) { return id; }
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78
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79 std::string name (void) { return id ? id->name () : ""; }
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80
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81 tree_expression * expression (void) { return expr; }
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82
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83 tree_decl_elt * dup (symbol_table::scope_id scope,
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84 symbol_table::context_id context) const;
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85
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86 void accept (tree_walker& tw)
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87 {
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88 tw.visit_decl_elt (*this);
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89 }
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90
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91 private:
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92
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93 // An identifier to tag with the declared property.
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94 tree_identifier *id;
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95
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96 // An initializer expression (may be zero);
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97 tree_expression *expr;
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98 };
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99
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100 class tree_decl_init_list : public octave::base_list<tree_decl_elt *>
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101 {
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102 public:
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103
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104 tree_decl_init_list (void) { }
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105
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106 tree_decl_init_list (tree_decl_elt *t) { append (t); }
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107
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108 // No copying!
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109
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110 tree_decl_init_list (const tree_decl_init_list&) = delete;
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111
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112 tree_decl_init_list& operator = (const tree_decl_init_list&) = delete;
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113
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114 ~tree_decl_init_list (void)
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115 {
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116 while (! empty ())
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117 {
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118 iterator p = begin ();
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119 delete *p;
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120 erase (p);
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121 }
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122 }
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123
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124 tree_decl_init_list * dup (symbol_table::scope_id scope,
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125 symbol_table::context_id context) const;
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126
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127 void accept (tree_walker& tw)
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128 {
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129 tw.visit_decl_init_list (*this);
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130 }
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131 };
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132
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133 // Base class for declaration commands -- global, static, etc.
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134
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135 class tree_decl_command : public tree_command
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136 {
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137 public:
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138
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139 tree_decl_command (const std::string& n, int l = -1, int c = -1)
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140 : tree_command (l, c), cmd_name (n), init_list (0) { }
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141
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142 tree_decl_command (const std::string& n, tree_decl_init_list *t,
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143 int l = -1, int c = -1)
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144 : tree_command (l, c), cmd_name (n), init_list (t) { }
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145
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146 // No copying!
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147
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148 tree_decl_command (const tree_decl_command&) = delete;
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149
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150 tree_decl_command& operator = (const tree_decl_command&) = delete;
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151
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152 ~tree_decl_command (void);
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153
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154 tree_decl_init_list * initializer_list (void) { return init_list; }
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155
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156 std::string name (void) { return cmd_name; }
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157
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158 protected:
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159
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160 // The name of this command -- global, static, etc.
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161 std::string cmd_name;
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162
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163 // The list of variables or initializers in this declaration command.
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164 tree_decl_init_list *init_list;
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165 };
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166
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167 // Global.
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168
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169 class tree_global_command : public tree_decl_command
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170 {
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171 public:
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172
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173 tree_global_command (int l = -1, int c = -1)
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174 : tree_decl_command ("global", l, c) { }
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175
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176 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1)
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177 : tree_decl_command ("global", t, l, c) { }
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178
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179 // No copying!
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180
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181 tree_global_command (const tree_global_command&) = delete;
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182
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183 tree_global_command& operator = (const tree_global_command&) = delete;
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184
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185 ~tree_global_command (void) = default;
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186
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187 tree_command * dup (symbol_table::scope_id scope,
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188 symbol_table::context_id context) const;
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189
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190 void accept (tree_walker& tw)
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191 {
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192 tw.visit_global_command (*this);
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193 }
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194
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195 private:
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196
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197 static void do_init (tree_decl_elt& elt);
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198 };
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199
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200 // Persistent.
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201
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202 class tree_persistent_command : public tree_decl_command
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203 {
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204 public:
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205
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206 tree_persistent_command (int l = -1, int c = -1)
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207 : tree_decl_command ("persistent", l, c) { }
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208
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209 tree_persistent_command (tree_decl_init_list *t, int l = -1, int c = -1)
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210 : tree_decl_command ("persistent", t, l, c) { }
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211
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212 // No copying!
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213
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214 tree_persistent_command (const tree_persistent_command&) = delete;
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215
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216 tree_persistent_command& operator = (const tree_persistent_command&) = delete;
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217
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218 ~tree_persistent_command (void) = default;
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219
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220 tree_command * dup (symbol_table::scope_id scope,
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221 symbol_table::context_id context) const;
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222
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223 void accept (tree_walker& tw)
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224 {
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225 tw.visit_persistent_command (*this);
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226 }
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227
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228 private:
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229
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230 static void do_init (tree_decl_elt& elt);
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231 };
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232 }
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233
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234 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)
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235
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236 OCTAVE_DEPRECATED ("use 'octave::tree_decl_elt' instead")
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237 typedef octave::tree_decl_elt tree_decl_elt;
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238
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239 // tree_decl_init_list is derived from a template.
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240
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241 OCTAVE_DEPRECATED ("use 'octave::tree_decl_command' instead")
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242 typedef octave::tree_decl_command tree_decl_command;
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243
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244 OCTAVE_DEPRECATED ("use 'octave::tree_global_command' instead")
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245 typedef octave::tree_global_command tree_global_command;
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246
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247 OCTAVE_DEPRECATED ("use 'octave::tree_persistent_command' instead")
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248 typedef octave::tree_persistent_command tree_persistent_command;
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249
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250 #endif
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251
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252 #endif