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34f7b3db VS |
1 | // @import types/boxed/*.ck |
2 | // @import types/MalObject.ck | |
98c1ecf2 VS |
3 | // @import types/mal/MalAtom.ck |
4 | // @import types/mal/MalError.ck | |
5 | // @import types/mal/MalNil.ck | |
6 | // @import types/mal/MalFalse.ck | |
7 | // @import types/mal/MalTrue.ck | |
8 | // @import types/mal/MalInt.ck | |
9 | // @import types/mal/MalString.ck | |
10 | // @import types/mal/MalSymbol.ck | |
11 | // @import types/mal/MalKeyword.ck | |
12 | // @import types/mal/MalList.ck | |
13 | // @import types/mal/MalVector.ck | |
14 | // @import types/mal/MalHashMap.ck | |
34f7b3db VS |
15 | // @import util/*.ck |
16 | // @import reader.ck | |
17 | // @import printer.ck | |
18 | // @import env.ck | |
19 | // @import types/MalSubr.ck | |
20 | // @import types/subr/*.ck | |
21 | // @import core.ck | |
22 | // @import func.ck | |
23 | ||
24 | fun MalObject READ(string input) | |
25 | { | |
26 | return Reader.read_str(input); | |
27 | } | |
28 | ||
29 | fun int isPair(MalObject m) | |
30 | { | |
31 | if( (m.type == "list" || m.type == "vector") && | |
32 | Util.sequenceToMalObjectArray(m).size() > 0 ) | |
33 | { | |
34 | return true; | |
35 | } | |
36 | else | |
37 | { | |
38 | return false; | |
39 | } | |
40 | } | |
41 | ||
42 | fun MalObject quasiquote(MalObject ast) | |
43 | { | |
44 | if( !isPair(ast) ) | |
45 | { | |
46 | return MalList.create([MalSymbol.create("quote"), ast]); | |
47 | } | |
48 | ||
49 | Util.sequenceToMalObjectArray(ast) @=> MalObject a[]; | |
50 | a[0] @=> MalObject a0; | |
51 | ||
52 | if( a0.type == "symbol" && (a0$MalSymbol).value() == "unquote" ) | |
53 | { | |
54 | return a[1]; | |
55 | } | |
56 | ||
57 | if( isPair(a0) ) | |
58 | { | |
59 | Util.sequenceToMalObjectArray(a0) @=> MalObject a0_[]; | |
60 | a0_[0] @=> MalObject a0_0; | |
61 | ||
62 | if( a0_0.type == "symbol" && (a0_0$MalSymbol).value() == "splice-unquote" ) | |
63 | { | |
64 | return MalList.create( | |
65 | [MalSymbol.create("concat"), a0_[1], | |
66 | quasiquote(MalList.create(MalObject.slice(a, 1)))]); | |
67 | } | |
68 | } | |
69 | ||
70 | return MalList.create( | |
71 | [MalSymbol.create("cons"), quasiquote(a[0]), | |
72 | quasiquote(MalList.create(MalObject.slice(a, 1)))]); | |
73 | } | |
74 | ||
75 | fun MalObject EVAL(MalObject m, Env env) | |
76 | { | |
77 | while( true ) | |
78 | { | |
79 | if( m.type != "list" ) | |
80 | { | |
81 | return eval_ast(m, env); | |
82 | } | |
83 | ||
84 | if( (m$MalList).value().size() == 0 ) | |
85 | { | |
86 | return m; | |
87 | } | |
88 | ||
89 | (m$MalList).value() @=> MalObject ast[]; | |
90 | ||
91 | if( ast[0].type == "symbol" ) | |
92 | { | |
93 | (ast[0]$MalSymbol).value() => string a0; | |
94 | ||
95 | if( a0 == "def!" ) | |
96 | { | |
97 | (ast[1]$MalSymbol).value() => string a1; | |
98 | ||
99 | EVAL(ast[2], env) @=> MalObject value; | |
100 | if( value.type == "error" ) | |
101 | { | |
102 | return value; | |
103 | } | |
104 | ||
105 | env.set(a1, value); | |
106 | return value; | |
107 | } | |
108 | else if( a0 == "let*" ) | |
109 | { | |
110 | Env.create(env) @=> Env let_env; | |
111 | Util.sequenceToMalObjectArray(ast[1]) @=> MalObject bindings[]; | |
112 | ||
113 | for( 0 => int i; i < bindings.size(); 2 +=> i) | |
114 | { | |
115 | (bindings[i]$MalSymbol).value() => string symbol; | |
116 | EVAL(bindings[i+1], let_env) @=> MalObject value; | |
117 | ||
118 | if( value.type == "error" ) | |
119 | { | |
120 | return value; | |
121 | } | |
122 | ||
123 | let_env.set(symbol, value); | |
124 | } | |
125 | ||
126 | let_env @=> env; | |
127 | ast[2] @=> m; | |
128 | continue; // TCO | |
129 | } | |
130 | else if( a0 == "quote" ) | |
131 | { | |
132 | return ast[1]; | |
133 | } | |
134 | else if( a0 == "quasiquote" ) | |
135 | { | |
136 | quasiquote(ast[1]) @=> m; | |
137 | continue; // TCO | |
138 | } | |
139 | else if( a0 == "do" ) | |
140 | { | |
98c1ecf2 | 141 | MalObject.slice(ast, 1, ast.size()-1) @=> MalObject forms[]; |
34f7b3db VS |
142 | eval_ast(MalList.create(forms), env) @=> MalObject value; |
143 | ||
144 | if( value.type == "error" ) | |
145 | { | |
146 | return value; | |
147 | } | |
148 | ||
149 | // HACK: this assumes do gets at least one argument... | |
150 | ast[ast.size()-1] @=> m; | |
151 | continue; // TCO | |
152 | } | |
153 | else if( a0 == "if" ) | |
154 | { | |
155 | EVAL(ast[1], env) @=> MalObject condition; | |
156 | ||
157 | if( condition.type == "error" ) | |
158 | { | |
159 | return condition; | |
160 | } | |
161 | ||
162 | if( !(condition.type == "nil") && !(condition.type == "false") ) | |
163 | { | |
164 | ast[2] @=> m; | |
165 | continue; // TCO | |
166 | } | |
167 | else | |
168 | { | |
169 | if( ast.size() < 4 ) | |
170 | { | |
171 | return Constants.NIL; | |
172 | } | |
173 | else | |
174 | { | |
175 | ast[3] @=> m; | |
176 | continue; // TCO | |
177 | } | |
178 | } | |
179 | } | |
180 | else if( a0 == "fn*" ) | |
181 | { | |
182 | (ast[1]$MalList).value() @=> MalObject arg_values[]; | |
183 | string args[arg_values.size()]; | |
184 | ||
185 | for( 0 => int i; i < arg_values.size(); i++ ) | |
186 | { | |
187 | (arg_values[i]$MalSymbol).value() => args[i]; | |
188 | } | |
189 | ||
190 | ast[2] @=> MalObject _ast; | |
191 | ||
192 | return Func.create(env, args, _ast); | |
193 | } | |
194 | } | |
195 | ||
196 | eval_ast(m, env) @=> MalObject result; | |
197 | if( result.type == "error" ) | |
198 | { | |
199 | return result; | |
200 | } | |
201 | ||
202 | (result$MalList).value() @=> MalObject values[]; | |
203 | values[0].type => string type; | |
204 | MalObject.slice(values, 1) @=> MalObject args[]; | |
205 | ||
206 | if( type == "subr" ) | |
207 | { | |
208 | values[0]$MalSubr @=> MalSubr subr; | |
98c1ecf2 | 209 | return subr.call(args); |
34f7b3db VS |
210 | } |
211 | else // type == "func" | |
212 | { | |
213 | values[0]$Func @=> Func func; | |
214 | Env.create(func.env, func.args, args) @=> Env eval_env; | |
215 | eval_env @=> env; | |
216 | func.ast @=> m; | |
217 | continue; // TCO | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
222 | fun MalObject eval_ast(MalObject m, Env env) | |
223 | { | |
224 | m.type => string type; | |
225 | ||
226 | if( type == "symbol" ) | |
227 | { | |
228 | (m$MalSymbol).value() => string symbol; | |
229 | return env.get(symbol); | |
230 | } | |
231 | else if( type == "list" || type == "vector" || type == "hashmap" ) | |
232 | { | |
233 | (m$MalList).value() @=> MalObject values[]; | |
234 | MalObject results[values.size()]; | |
235 | ||
236 | if( type != "hashmap" ) | |
237 | { | |
238 | for( 0 => int i; i < values.size(); i++ ) | |
239 | { | |
240 | EVAL(values[i], env) @=> MalObject result; | |
241 | ||
242 | if( result.type == "error" ) | |
243 | { | |
244 | return result; | |
245 | } | |
246 | ||
247 | result @=> results[i]; | |
248 | } | |
249 | } | |
250 | else | |
251 | { | |
252 | for( 0 => int i; i < values.size(); i++ ) | |
253 | { | |
254 | if( i % 2 == 0 ) | |
255 | { | |
256 | values[i] @=> results[i]; | |
257 | } | |
258 | else | |
259 | { | |
260 | EVAL(values[i], env) @=> results[i]; | |
261 | } | |
262 | } | |
263 | } | |
264 | ||
265 | if( type == "list" ) | |
266 | { | |
267 | return MalList.create(results); | |
268 | } | |
269 | else if( type == "vector" ) | |
270 | { | |
271 | return MalVector.create(results); | |
272 | } | |
273 | else if( type == "hashmap" ) | |
274 | { | |
275 | return MalHashMap.create(results); | |
276 | } | |
277 | } | |
278 | else | |
279 | { | |
280 | return m; | |
281 | } | |
282 | } | |
283 | ||
284 | fun string PRINT(MalObject m) | |
285 | { | |
286 | return Printer.pr_str(m, true); | |
287 | } | |
288 | ||
289 | Env.create(null) @=> Env repl_env; | |
290 | for( 0 => int i; i < Core.names.size(); i++ ) | |
291 | { | |
292 | Core.names[i] => string name; | |
293 | repl_env.set(name, Core.ns[name]); | |
294 | } | |
295 | ||
98c1ecf2 VS |
296 | // HACK, HACK, HACK |
297 | class MalEval extends MalSubr | |
298 | { | |
299 | fun MalObject call(MalObject args[]) | |
300 | { | |
301 | args[0] @=> MalObject m; | |
302 | return EVAL(args[0], repl_env); | |
303 | } | |
304 | ||
305 | fun MalObject apply(MalObject f, MalObject args[]) | |
306 | { | |
307 | if( f.type == "subr" ) | |
308 | { | |
309 | return (f$MalSubr).call(args); | |
310 | } | |
311 | else // f.type == "func" | |
312 | { | |
313 | f$Func @=> Func func; | |
314 | Env.create(func.env, func.args, args) @=> Env eval_env; | |
315 | return EVAL(func.ast, eval_env); | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | new MalEval @=> MalEval eval; | |
321 | repl_env.set("eval", new MalEval); | |
322 | eval @=> (repl_env.get("swap!")$MalSubr).eval; | |
34f7b3db VS |
323 | |
324 | fun MalObject[] MalArgv(string args[]) | |
325 | { | |
326 | MalObject values[args.size()-1]; | |
327 | ||
328 | for( 1 => int i; i < args.size(); i++ ) | |
329 | { | |
330 | MalString.create(args[i]) @=> values[i-1]; | |
331 | } | |
332 | ||
333 | return values; | |
334 | } | |
335 | ||
336 | // NOTE: normally I'd use \0, but strings are null-terminated... | |
337 | String.split(Std.getenv("CHUCK_ARGS"), "\a") @=> string args[]; | |
338 | repl_env.set("*ARGV*", MalList.create(MalArgv(args))); | |
339 | ||
98c1ecf2 VS |
340 | fun string errorMessage(MalObject m) |
341 | { | |
342 | (m$MalError).value() @=> MalObject value; | |
343 | ||
344 | if( value.type == "string" ) | |
345 | { | |
346 | return Printer.pr_str(value, false); | |
347 | } | |
348 | else | |
349 | { | |
350 | return "exception: " + Printer.pr_str(value, true); | |
351 | } | |
352 | } | |
353 | ||
34f7b3db VS |
354 | fun string rep(string input) |
355 | { | |
356 | READ(input) @=> MalObject m; | |
357 | ||
358 | if( m.type == "error" ) | |
359 | { | |
98c1ecf2 | 360 | return errorMessage(m); |
34f7b3db VS |
361 | } |
362 | ||
363 | EVAL(m, repl_env) @=> MalObject result; | |
364 | if( result.type == "error" ) | |
365 | { | |
98c1ecf2 | 366 | return errorMessage(result); |
34f7b3db VS |
367 | } |
368 | ||
369 | return PRINT(result); | |
370 | } | |
371 | ||
372 | rep("(def! not (fn* (a) (if a false true)))"); | |
373 | rep("(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))"); | |
374 | ||
375 | fun void main() | |
376 | { | |
377 | ConsoleInput stdin; | |
378 | string input; | |
379 | ||
380 | while( true ) | |
381 | { | |
382 | stdin.prompt("user>") => now; | |
383 | stdin.getLine() => input; | |
384 | rep(input) => string output; | |
385 | ||
386 | if( output == "empty input" ) | |
387 | { | |
388 | // proceed immediately with prompt | |
389 | } | |
390 | else | |
391 | { | |
392 | Util.println(output); | |
393 | } | |
394 | } | |
395 | } | |
396 | ||
397 | if( args.size() > 1 ) | |
398 | { | |
399 | args[1] => string filename; | |
400 | rep("(load-file \"" + filename + "\")"); | |
401 | } | |
402 | else | |
403 | { | |
404 | main(); | |
405 | } |