summaryrefslogtreecommitdiffhomepage
path: root/Stars45/Term.h
blob: 79e2fc3aeb78e3fc4efc7eac8c94c2c73add4c5c (plain)
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
/*  Starshatter: The Open Source Project
    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
    Copyright (c) 1997-2006, Destroyer Studios LLC.

     AUTHOR:       John DiCamillo


     OVERVIEW
     ========
     Declaration of the Abstract Syntax Tree classes
*/


#ifndef TERM_H
#define TERM_H

#include "Text.h"
#include "List.h"

// +-------------------------------------------------------------------+

class Term;
class TermBool;
class TermNumber;
class TermText;
class TermArray;
class TermDef;
class TermStruct;

// +-------------------------------------------------------------------+

class Term
{
public:
    static const char* TYPENAME() { return "Term"; }

     Term()            { }
    virtual ~Term()   { }

    virtual int operator==(const Term& rhs) const { return 0; }

     virtual void print(int level=10) { }

     // conversion tests
     virtual Term*              touch()     { return this; }
     virtual TermBool*          isBool()    { return 0; }
     virtual TermNumber*        isNumber()  { return 0; }
     virtual TermText*          isText()    { return 0; }
     virtual TermArray*         isArray()   { return 0; }
     virtual TermDef*           isDef()     { return 0; }
     virtual TermStruct*        isStruct()  { return 0; }
};

Term* error(char*, char* = 0);

// +-------------------------------------------------------------------+

typedef List<Term>      TermList;
typedef ListIter<Term>  TermListIter;

// +-------------------------------------------------------------------+

class TermBool : public Term
{
public:
    static const char* TYPENAME() { return "TermBool"; }

    TermBool(bool v) : val(v) { }

    virtual void      print(int level=10);
     virtual TermBool* isBool()      { return this; }
              bool      value() const { return val;  }

private:
    bool val;
};

// +-------------------------------------------------------------------+

class TermNumber : public Term
{
public:
    static const char* TYPENAME() { return "TermNumber"; }

    TermNumber(double v) : val(v) { }

    virtual void         print(int level=10);
     virtual TermNumber*  isNumber()     { return this; }
              double       value() const  { return val;  }

private:
    double val;
};

// +-------------------------------------------------------------------+

class TermText : public Term
{
public:
    static const char* TYPENAME() { return "TermText"; }

    TermText(const Text& v) : val(v)   { }

    virtual void      print(int level=10);
     virtual TermText* isText()       { return this; }
              Text      value() const  { return val;  }

private:
    Text val;
};

// +-------------------------------------------------------------------+

class TermArray : public Term
{
public:
    static const char* TYPENAME() { return "TermArray"; }

    TermArray(TermList* elist);
    virtual ~TermArray();

    virtual void         print(int level=10);
    virtual TermArray*   isArray()   { return this;  }
              TermList*    elements()  { return elems; }

private:
    TermList*   elems;
};

// +-------------------------------------------------------------------+

class TermStruct : public Term
{
public:
    static const char* TYPENAME() { return "TermStruct"; }

    TermStruct(TermList* elist);
    virtual ~TermStruct();

    virtual void         print(int level=10);

    virtual TermStruct*  isStruct()  { return this; }
              TermList*    elements()  { return elems; }

private:
    TermList*   elems;
};

// +-------------------------------------------------------------------+

class TermDef : public Term
{
public:
    static const char* TYPENAME() { return "TermDef"; }

    TermDef(TermText* n, Term* v) : mname(n), mval(v) { }
    virtual ~TermDef();

    virtual void         print(int level=10);
    virtual TermDef*     isDef()     { return this; }

    virtual TermText*    name()      { return mname; }
    virtual Term*        term()      { return mval;  }

private:
    TermText*   mname;
    Term*       mval;
};

#endif