Commit | Line | Data |
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2e3d457e | 1 | // @import readline.ck |
0c8b871a VS |
2 | // @import types/boxed/*.ck |
3 | // @import types/MalObject.ck | |
98c1ecf2 VS |
4 | // @import types/mal/MalAtom.ck |
5 | // @import types/mal/MalError.ck | |
6 | // @import types/mal/MalNil.ck | |
7 | // @import types/mal/MalFalse.ck | |
8 | // @import types/mal/MalTrue.ck | |
9 | // @import types/mal/MalInt.ck | |
10 | // @import types/mal/MalString.ck | |
11 | // @import types/mal/MalSymbol.ck | |
12 | // @import types/mal/MalKeyword.ck | |
13 | // @import types/mal/MalList.ck | |
14 | // @import types/mal/MalVector.ck | |
15 | // @import types/mal/MalHashMap.ck | |
0c8b871a VS |
16 | // @import util/*.ck |
17 | // @import reader.ck | |
18 | // @import printer.ck | |
aa0ac94f | 19 | // @import env.ck |
7cabea4f | 20 | // @import func.ck |
f823ec25 VS |
21 | // @import types/MalSubr.ck |
22 | // @import types/subr/*.ck | |
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23 | |
24 | fun MalObject READ(string input) | |
25 | { | |
26 | return Reader.read_str(input); | |
27 | } | |
28 | ||
29 | fun MalObject EVAL(MalObject m, Env env) | |
30 | { | |
31 | if( m.type == "list" ) | |
32 | { | |
33 | if( (m$MalList).value().size() == 0 ) | |
34 | { | |
35 | return m; | |
36 | } | |
37 | ||
38 | (m$MalList).value() @=> MalObject ast[]; | |
39 | (ast[0]$MalSymbol).value() => string a0; | |
40 | ||
41 | if( a0 == "def!" ) | |
42 | { | |
43 | (ast[1]$MalSymbol).value() => string a1; | |
44 | ||
45 | EVAL(ast[2], env) @=> MalObject value; | |
46 | if( value.type == "error" ) | |
47 | { | |
48 | return value; | |
49 | } | |
50 | ||
51 | env.set(a1, value); | |
52 | return value; | |
53 | } | |
54 | else if( a0 == "let*" ) | |
55 | { | |
56 | Env.create(env) @=> Env let_env; | |
57 | Util.sequenceToMalObjectArray(ast[1]) @=> MalObject bindings[]; | |
58 | ||
59 | for( 0 => int i; i < bindings.size(); 2 +=> i) | |
60 | { | |
61 | (bindings[i]$MalSymbol).value() => string symbol; | |
62 | EVAL(bindings[i+1], let_env) @=> MalObject value; | |
63 | ||
64 | if( value.type == "error" ) | |
65 | { | |
66 | return value; | |
67 | } | |
68 | ||
69 | let_env.set(symbol, value); | |
70 | } | |
71 | ||
72 | return EVAL(ast[2], let_env); | |
73 | } | |
74 | ||
75 | eval_ast(m, env) @=> MalObject result; | |
76 | if( result.type == "error" ) | |
77 | { | |
78 | return result; | |
79 | } | |
80 | ||
81 | (result$MalList).value() @=> MalObject values[]; | |
82 | values[0]$MalSubr @=> MalSubr subr; | |
83 | MalObject.slice(values, 1) @=> MalObject args[]; | |
84 | ||
85 | return subr.call(args); | |
86 | } | |
87 | else | |
88 | { | |
89 | eval_ast(m, env) @=> MalObject result; | |
90 | return result; | |
91 | } | |
92 | } | |
93 | ||
94 | fun MalObject eval_ast(MalObject m, Env env) | |
95 | { | |
96 | m.type => string type; | |
97 | ||
98 | if( type == "symbol" ) | |
99 | { | |
100 | (m$MalSymbol).value() => string symbol; | |
101 | return env.get(symbol); | |
102 | } | |
103 | else if( type == "list" || type == "vector" || type == "hashmap" ) | |
104 | { | |
105 | (m$MalList).value() @=> MalObject values[]; | |
106 | MalObject results[values.size()]; | |
107 | ||
108 | if( type != "hashmap" ) | |
109 | { | |
110 | for( 0 => int i; i < values.size(); i++ ) | |
111 | { | |
112 | EVAL(values[i], env) @=> MalObject result; | |
113 | ||
114 | if( result.type == "error" ) | |
115 | { | |
116 | return result; | |
117 | } | |
118 | ||
119 | result @=> results[i]; | |
120 | } | |
121 | } | |
122 | else | |
123 | { | |
124 | for( 0 => int i; i < values.size(); i++ ) | |
125 | { | |
126 | if( i % 2 == 0 ) | |
127 | { | |
128 | values[i] @=> results[i]; | |
129 | } | |
130 | else | |
131 | { | |
132 | EVAL(values[i], env) @=> results[i]; | |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | if( type == "list" ) | |
138 | { | |
139 | return MalList.create(results); | |
140 | } | |
141 | else if( type == "vector" ) | |
142 | { | |
143 | return MalVector.create(results); | |
144 | } | |
145 | else if( type == "hashmap" ) | |
146 | { | |
147 | return MalHashMap.create(results); | |
148 | } | |
149 | } | |
150 | else | |
151 | { | |
152 | return m; | |
153 | } | |
154 | } | |
155 | ||
156 | fun string PRINT(MalObject m) | |
157 | { | |
158 | return Printer.pr_str(m, true); | |
159 | } | |
160 | ||
161 | Env.create(null) @=> Env repl_env; | |
162 | repl_env.set("+", new MalAdd); | |
163 | repl_env.set("-", new MalSub); | |
164 | repl_env.set("*", new MalMul); | |
165 | repl_env.set("/", new MalDiv); | |
166 | ||
98c1ecf2 VS |
167 | fun string errorMessage(MalObject m) |
168 | { | |
169 | (m$MalError).value() @=> MalObject value; | |
dd7a4f55 | 170 | return "exception: " + Printer.pr_str(value, true); |
98c1ecf2 VS |
171 | } |
172 | ||
0c8b871a VS |
173 | fun string rep(string input) |
174 | { | |
175 | READ(input) @=> MalObject m; | |
176 | ||
177 | if( m.type == "error" ) | |
178 | { | |
98c1ecf2 | 179 | return errorMessage(m); |
0c8b871a VS |
180 | } |
181 | ||
182 | EVAL(m, repl_env) @=> MalObject result; | |
183 | if( result.type == "error" ) | |
184 | { | |
98c1ecf2 | 185 | return errorMessage(result); |
0c8b871a VS |
186 | } |
187 | ||
188 | return PRINT(result); | |
189 | } | |
190 | ||
191 | fun void main() | |
192 | { | |
2e3d457e | 193 | int done; |
0c8b871a | 194 | |
2e3d457e | 195 | while( !done ) |
0c8b871a | 196 | { |
2e3d457e | 197 | Readline.readline("user> ") => string input; |
0c8b871a | 198 | |
2e3d457e | 199 | if( input != null ) |
0c8b871a | 200 | { |
2e3d457e VS |
201 | rep(input) => string output; |
202 | ||
203 | if( output == "empty input" ) | |
204 | { | |
205 | // proceed immediately with prompt | |
206 | } | |
207 | else | |
208 | { | |
209 | Util.println(output); | |
210 | } | |
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211 | } |
212 | else | |
213 | { | |
2e3d457e | 214 | true => done; |
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215 | } |
216 | } | |
217 | } | |
218 | ||
219 | main(); |