GNU Octave  4.0.0
A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
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pt-decl.cc
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1 /*
2 
3 Copyright (C) 1996-2015 John W. Eaton
4 
5 This file is part of Octave.
6 
7 Octave is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
11 
12 Octave is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16 
17 You should have received a copy of the GNU General Public License
18 along with Octave; see the file COPYING. If not, see
19 <http://www.gnu.org/licenses/>.
20 
21 */
22 
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26 
27 #include "defun.h"
28 #include "error.h"
29 #include "pt-cmd.h"
30 #include "ov.h"
31 #include "oct-lvalue.h"
32 #include "pt-bp.h"
33 #include "pt-decl.h"
34 #include "pt-exp.h"
35 #include "pt-id.h"
36 #include "pt-walk.h"
37 #include "utils.h"
38 #include "variables.h"
39 
40 // Declarations (global, static, etc.).
41 
43 {
44  delete id;
45  delete expr;
46 }
47 
48 bool
50 {
51  bool retval = false;
52 
53  if (id && expr)
54  {
55  octave_lvalue ult = id->lvalue ();
56 
57  octave_value init_val = expr->rvalue1 ();
58 
59  if (! error_state)
60  {
61  ult.assign (octave_value::op_asn_eq, init_val);
62 
63  retval = true;
64  }
65  }
66 
67  return retval;
68 }
69 
73 {
74  return new tree_decl_elt (id ? id->dup (scope, context) : 0,
75  expr ? expr->dup (scope, context) : 0);
76 }
77 
78 void
80 {
81  tw.visit_decl_elt (*this);
82 }
83 
84 // Initializer lists for declaration statements.
85 
89 {
90  tree_decl_init_list *new_dil = new tree_decl_init_list ();
91 
92  for (const_iterator p = begin (); p != end (); p++)
93  {
94  const tree_decl_elt *elt = *p;
95 
96  new_dil->append (elt ? elt->dup (scope, context) : 0);
97  }
98 
99  return new_dil;
100 }
101 
102 void
104 {
105  tw.visit_decl_init_list (*this);
106 }
107 
108 // Base class for declaration commands (global, static).
109 
111 {
112  delete init_list;
113 }
114 
115 // Global.
116 
117 tree_command *
120 {
121  return
122  new tree_global_command (init_list ? init_list->dup (scope, context) : 0,
123  line (), column ());
124 }
125 
126 void
128 {
129  tw.visit_global_command (*this);
130 }
131 
132 // Static.
133 
134 tree_command *
137 {
138  return
139  new tree_persistent_command (init_list ? init_list->dup (scope, context)
140  : 0,
141  line (), column ());
142 }
143 
144 void
146 {
147  tw.visit_persistent_command (*this);
148 }
tree_decl_init_list(void)
Definition: pt-decl.h:116
tree_decl_elt * dup(symbol_table::scope_id scope, symbol_table::context_id context) const
Definition: pt-decl.cc:71
tree_identifier * id
Definition: pt-decl.h:99
tree_decl_init_list * dup(symbol_table::scope_id scope, symbol_table::context_id context) const
Definition: pt-decl.cc:87
virtual tree_expression * dup(symbol_table::scope_id, symbol_table::context_id context) const =0
tree_expression * expr
Definition: pt-decl.h:102
tree_identifier * dup(symbol_table::scope_id scope, symbol_table::context_id context) const
Definition: pt-id.cc:139
virtual void visit_global_command(tree_global_command &)=0
void append(const elt_type &s)
Definition: base-list.h:105
virtual void visit_persistent_command(tree_persistent_command &)=0
static llvm::LLVMContext & context
Definition: jit-typeinfo.cc:76
tree_command * dup(symbol_table::scope_id scope, symbol_table::context_id context) const
Definition: pt-decl.cc:118
tree_persistent_command(int l=-1, int c=-1)
Definition: pt-decl.h:219
int error_state
Definition: error.cc:101
tree_global_command(int l=-1, int c=-1)
Definition: pt-decl.h:188
void accept(tree_walker &tw)
Definition: pt-decl.cc:127
std::list< tree_decl_elt * >::const_iterator const_iterator
Definition: base-list.h:37
void accept(tree_walker &tw)
Definition: pt-decl.cc:145
void accept(tree_walker &tw)
Definition: pt-decl.cc:103
virtual int line(void) const
Definition: pt.h:45
tree_decl_init_list * init_list
Definition: pt-decl.h:170
virtual octave_value rvalue1(int nargout=1)
Definition: pt-exp.cc:58
void assign(octave_value::assign_op, const octave_value &)
Definition: oct-lvalue.cc:33
virtual void visit_decl_init_list(tree_decl_init_list &)=0
void accept(tree_walker &tw)
Definition: pt-decl.cc:79
~tree_decl_command(void)
Definition: pt-decl.cc:110
tree_decl_elt(tree_identifier *i=0, tree_expression *e=0)
Definition: pt-decl.h:46
bool eval(void)
Definition: pt-decl.cc:49
virtual int column(void) const
Definition: pt.h:47
tree_command * dup(symbol_table::scope_id scope, symbol_table::context_id context) const
Definition: pt-decl.cc:135
~tree_decl_elt(void)
Definition: pt-decl.cc:42
virtual void visit_decl_elt(tree_decl_elt &)=0