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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/********************* */
/*! \file sexpr.h
** \verbatim
** Original author: cconway
** Major contributors: mdeters
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009-2012 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 Simple representation of S-expressions
**
** Simple representation of S-expressions.
**/
#include "cvc4_public.h"
#ifndef __CVC4__SEXPR_H
#define __CVC4__SEXPR_H
#include <vector>
#include <string>
#include "util/integer.h"
#include "util/rational.h"
#include "util/Assert.h"
namespace CVC4 {
/**
* A simple S-expression. An S-expression is either an atom with a
* string value, or a list of other S-expressions.
*/
class CVC4_PUBLIC SExpr {
enum SExprTypes {
SEXPR_STRING,
SEXPR_KEYWORD,
SEXPR_INTEGER,
SEXPR_RATIONAL,
SEXPR_NOT_ATOM
} d_sexprType;
/** The value of an atomic integer-valued S-expression. */
CVC4::Integer d_integerValue;
/** The value of an atomic rational-valued S-expression. */
CVC4::Rational d_rationalValue;
/** The value of an atomic S-expression. */
std::string d_stringValue;
/** The children of a list S-expression. */
std::vector<SExpr> d_children;
public:
class Keyword : protected std::string {
public:
Keyword(const std::string& s) : std::string(s) {}
const std::string& getString() const { return *this; }
};/* class Keyword */
SExpr() :
d_sexprType(SEXPR_STRING),
d_integerValue(0),
d_rationalValue(0),
d_stringValue(""),
d_children() {
}
SExpr(const CVC4::Integer& value) :
d_sexprType(SEXPR_INTEGER),
d_integerValue(value),
d_rationalValue(0),
d_stringValue(""),
d_children() {
}
SExpr(const CVC4::Rational& value) :
d_sexprType(SEXPR_RATIONAL),
d_integerValue(0),
d_rationalValue(value),
d_stringValue(""),
d_children() {
}
SExpr(const std::string& value) :
d_sexprType(SEXPR_STRING),
d_integerValue(0),
d_rationalValue(0),
d_stringValue(value),
d_children() {
}
SExpr(const Keyword& value) :
d_sexprType(SEXPR_KEYWORD),
d_integerValue(0),
d_rationalValue(0),
d_stringValue(value.getString()),
d_children() {
}
SExpr(const std::vector<SExpr> children) :
d_sexprType(SEXPR_NOT_ATOM),
d_integerValue(0),
d_rationalValue(0),
d_stringValue(""),
d_children(children) {
}
/** Is this S-expression an atom? */
bool isAtom() const;
/** Is this S-expression an integer? */
bool isInteger() const;
/** Is this S-expression a rational? */
bool isRational() const;
/** Is this S-expression a string? */
bool isString() const;
/** Is this S-expression a string? */
bool isKeyword() const;
/**
* Get the string value of this S-expression. This will cause an
* error if this S-expression is not an atom.
*/
const std::string getValue() const;
/**
* Get the integer value of this S-expression. This will cause an
* error if this S-expression is not an integer.
*/
const CVC4::Integer& getIntegerValue() const;
/**
* Get the rational value of this S-expression. This will cause an
* error if this S-expression is not a rational.
*/
const CVC4::Rational& getRationalValue() const;
/**
* Get the children of this S-expression. This will cause an error
* if this S-expression is not a list.
*/
const std::vector<SExpr>& getChildren() const;
};/* class SExpr */
inline bool SExpr::isAtom() const {
return d_sexprType != SEXPR_NOT_ATOM;
}
inline bool SExpr::isInteger() const {
return d_sexprType == SEXPR_INTEGER;
}
inline bool SExpr::isRational() const {
return d_sexprType == SEXPR_RATIONAL;
}
inline bool SExpr::isString() const {
return d_sexprType == SEXPR_STRING;
}
inline bool SExpr::isKeyword() const {
return d_sexprType == SEXPR_KEYWORD;
}
inline const std::string SExpr::getValue() const {
AlwaysAssert( isAtom() );
switch(d_sexprType) {
case SEXPR_INTEGER:
return d_integerValue.toString();
case SEXPR_RATIONAL:
return d_rationalValue.toString();
case SEXPR_STRING:
case SEXPR_KEYWORD:
return d_stringValue;
default:
Unhandled(d_sexprType);
}
return d_stringValue;
}
inline const CVC4::Integer& SExpr::getIntegerValue() const {
AlwaysAssert( isInteger() );
return d_integerValue;
}
inline const CVC4::Rational& SExpr::getRationalValue() const {
AlwaysAssert( isRational() );
return d_rationalValue;
}
inline const std::vector<SExpr>& SExpr::getChildren() const {
AlwaysAssert( !isAtom() );
return d_children;
}
std::ostream& operator<<(std::ostream& out, const SExpr& sexpr) CVC4_PUBLIC;
}/* CVC4 namespace */
#endif /* __CVC4__SEXPR_H */
|
