1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
Copyright (C) 1996-2015 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if !defined (octave_oct_lvalue_h)
#define octave_oct_lvalue_h 1
class octave_value;
class octave_value_list;
#include <string>
#include "oct-obj.h"
#include "pt-idx.h"
#include "symtab.h"
class
octave_lvalue
{
public:
octave_lvalue (const symbol_table::symbol_reference& s
= symbol_table::symbol_reference ())
: sym (s), type (), idx (), nel (1)
{ }
octave_lvalue (const octave_lvalue& vr)
: sym (vr.sym), type (vr.type), idx (vr.idx), nel (vr.nel)
{ }
octave_lvalue& operator = (const octave_lvalue& vr)
{
if (this != &vr)
{
sym = vr.sym;
type = vr.type;
idx = vr.idx;
nel = vr.nel;
}
return *this;
}
~octave_lvalue (void) { }
bool is_black_hole (void) const { return sym.is_black_hole (); }
bool is_defined (void) const
{
return ! is_black_hole () && sym->is_defined ();
}
bool is_undefined (void) const
{
return is_black_hole () || sym->is_undefined ();
}
bool is_map (void) const
{
return value().is_map ();
}
void define (const octave_value& v) { sym->assign (v); }
void assign (octave_value::assign_op, const octave_value&);
void numel (octave_idx_type n) { nel = n; }
octave_idx_type numel (void) const { return nel; }
void set_index (const std::string& t, const std::list<octave_value_list>& i);
void clear_index (void) { type = std::string (); idx.clear (); }
void do_unary_op (octave_value::unary_op op);
octave_value value (void) const;
private:
symbol_table::symbol_reference sym;
std::string type;
std::list<octave_value_list> idx;
octave_idx_type nel;
};
#endif
|
