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
|
#ifndef BUILTIN_H
#define BUILTIN_H
#include "model.h"
#include <string>
using std::string;
/** @class BoolObj
* Booleans
*/
class BoolObj: public EvalObj {
public:
bool val; /**< true for \#t, false for \#f */
BoolObj(bool); /**< Converts a C bool value to a BoolObj*/
bool is_true(); /**< Override EvalObj `is_true()` */
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class IntObj
* A simple implementation of integers
* Will be removed in the future
*/
class IntObj: public NumberObj {
public:
int val; /**< Numeric value */
/** Converts a C integer value to a FloatObj */
IntObj(int);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class FloatObj
* Floating point numbers
*/
class FloatObj: public NumberObj {
public:
double val; /**< Numeric value */
/** Converts a C double value to a FloatObj */
FloatObj(double);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class SpecialOptIf
* The implementation of `if` operator
*/
class SpecialOptIf: public SpecialOptObj {
private:
unsigned char state; /**< 0 for prepared, 1 for pre_called */
/**
* The evaluator will call this after the <condition> exp is evaluated.
* And this function tells the evaluator which of <consequence> and
* <alternative> should be evaluted. */
void pre_call(ArgList *args, Cons *pc,
Environment *envt);
/** The system will call this again after the desired result is
* evaluated, so just return it to let the evaluator know the it's the
* answer.
*/
EvalObj *post_call(ArgList *args, Cons *pc,
Environment *envt);
public:
SpecialOptIf();
void prepare(Cons *pc);
Cons *call(ArgList *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class SpecialOptLambda
* The implementation of `lambda` operator
*/
class SpecialOptLambda: public SpecialOptObj {
public:
SpecialOptLambda();
void prepare(Cons *pc);
Cons *call(ArgList *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class SpecialOptDefine
* The implementation of `define` operator
*/
class SpecialOptDefine: public SpecialOptObj {
public:
SpecialOptDefine();
void prepare(Cons *pc);
Cons *call(ArgList *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
/** @class SpecialOptSet
* The implementation of `set!` operator
*/
class SpecialOptSet: public SpecialOptObj {
public:
SpecialOptSet();
void prepare(Cons *pc);
Cons *call(ArgList *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr);
#ifdef DEBUG
string _debug_repr();
#endif
string ext_repr();
};
EvalObj *builtin_plus(ArgList *);
EvalObj *builtin_minus(ArgList *);
EvalObj *builtin_times(ArgList *);
EvalObj *builtin_div(ArgList *);
EvalObj *builtin_lt(ArgList *);
EvalObj *builtin_gt(ArgList *);
EvalObj *builtin_arithmetic_eq(ArgList *);
EvalObj *builtin_display(ArgList *);
#endif
|