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
|
/********************* */
/*! \file subrange_bound.h
** \verbatim
** Original author: mdeters
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010, 2011 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Representation of subrange bounds
**
** Simple class to represent a subrange bound, either infinite
** (no bound) or finite (an arbitrary precision integer).
**/
#include "cvc4_public.h"
#ifndef __CVC4__SUBRANGE_BOUND_H
#define __CVC4__SUBRANGE_BOUND_H
#include "util/integer.h"
#include "util/Assert.h"
namespace CVC4 {
/**
* Representation of a subrange bound. A bound can either exist and be
* a finite arbitrary-precision integer, or not exist (and thus be
* an infinite bound). For example, the CVC language subrange [-5.._]
* has a lower bound of -5 and an infinite upper bound.
*/
class CVC4_PUBLIC SubrangeBound {
bool d_nobound;
Integer d_bound;
public:
/** Construct an infinite SubrangeBound. */
SubrangeBound() throw() :
d_nobound(true),
d_bound() {
}
/** Construct a finite SubrangeBound. */
SubrangeBound(const Integer& i) throw() :
d_nobound(false),
d_bound(i) {
}
~SubrangeBound() throw() {
}
/** Get the finite SubrangeBound, failing an assertion if infinite. */
Integer getBound() const throw(IllegalArgumentException) {
CheckArgument(!d_nobound, this, "SubrangeBound is infinite");
return d_bound;
}
/** Returns true iff this is a finite SubrangeBound. */
bool hasBound() const throw() {
return !d_nobound;
}
/** Test two SubrangeBounds for equality. */
bool operator==(const SubrangeBound& b) const throw() {
return hasBound() == b.hasBound() &&
(!hasBound() || getBound() == b.getBound());
}
/** Test two SubrangeBounds for disequality. */
bool operator!=(const SubrangeBound& b) const throw() {
return !(*this == b);
}
};/* class SubrangeBound */
inline std::ostream&
operator<<(std::ostream& out, const SubrangeBound& bound) throw() CVC4_PUBLIC;
inline std::ostream&
operator<<(std::ostream& out, const SubrangeBound& bound) throw() {
if(bound.hasBound()) {
out << bound.getBound();
} else {
out << '_';
}
return out;
}
}/* CVC4 namespace */
#endif /* __CVC4__SUBRANGE_BOUND_H */
|
