Commit | Line | Data |
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2e3d457e | 1 | // @import readline.ck |
34f7b3db 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 | |
34f7b3db VS |
16 | // @import util/*.ck |
17 | // @import reader.ck | |
18 | // @import printer.ck | |
19 | // @import env.ck | |
7cabea4f | 20 | // @import func.ck |
34f7b3db VS |
21 | // @import types/MalSubr.ck |
22 | // @import types/subr/*.ck | |
23 | // @import core.ck | |
34f7b3db VS |
24 | |
25 | fun MalObject READ(string input) | |
26 | { | |
27 | return Reader.read_str(input); | |
28 | } | |
29 | ||
30 | fun int isPair(MalObject m) | |
31 | { | |
32 | if( (m.type == "list" || m.type == "vector") && | |
33 | Util.sequenceToMalObjectArray(m).size() > 0 ) | |
34 | { | |
35 | return true; | |
36 | } | |
37 | else | |
38 | { | |
39 | return false; | |
40 | } | |
41 | } | |
42 | ||
43 | fun MalObject quasiquote(MalObject ast) | |
44 | { | |
45 | if( !isPair(ast) ) | |
46 | { | |
47 | return MalList.create([MalSymbol.create("quote"), ast]); | |
48 | } | |
49 | ||
50 | Util.sequenceToMalObjectArray(ast) @=> MalObject a[]; | |
51 | a[0] @=> MalObject a0; | |
52 | ||
53 | if( a0.type == "symbol" && (a0$MalSymbol).value() == "unquote" ) | |
54 | { | |
55 | return a[1]; | |
56 | } | |
57 | ||
58 | if( isPair(a0) ) | |
59 | { | |
60 | Util.sequenceToMalObjectArray(a0) @=> MalObject a0_[]; | |
61 | a0_[0] @=> MalObject a0_0; | |
62 | ||
63 | if( a0_0.type == "symbol" && (a0_0$MalSymbol).value() == "splice-unquote" ) | |
64 | { | |
65 | return MalList.create( | |
66 | [MalSymbol.create("concat"), a0_[1], | |
67 | quasiquote(MalList.create(MalObject.slice(a, 1)))]); | |
68 | } | |
69 | } | |
70 | ||
71 | return MalList.create( | |
72 | [MalSymbol.create("cons"), quasiquote(a[0]), | |
73 | quasiquote(MalList.create(MalObject.slice(a, 1)))]); | |
74 | } | |
75 | ||
76 | fun MalObject EVAL(MalObject m, Env env) | |
77 | { | |
78 | while( true ) | |
79 | { | |
80 | if( m.type != "list" ) | |
81 | { | |
82 | return eval_ast(m, env); | |
83 | } | |
84 | ||
85 | if( (m$MalList).value().size() == 0 ) | |
86 | { | |
87 | return m; | |
88 | } | |
89 | ||
90 | (m$MalList).value() @=> MalObject ast[]; | |
91 | ||
92 | if( ast[0].type == "symbol" ) | |
93 | { | |
94 | (ast[0]$MalSymbol).value() => string a0; | |
95 | ||
96 | if( a0 == "def!" ) | |
97 | { | |
98 | (ast[1]$MalSymbol).value() => string a1; | |
99 | ||
100 | EVAL(ast[2], env) @=> MalObject value; | |
101 | if( value.type == "error" ) | |
102 | { | |
103 | return value; | |
104 | } | |
105 | ||
106 | env.set(a1, value); | |
107 | return value; | |
108 | } | |
109 | else if( a0 == "let*" ) | |
110 | { | |
111 | Env.create(env) @=> Env let_env; | |
112 | Util.sequenceToMalObjectArray(ast[1]) @=> MalObject bindings[]; | |
113 | ||
114 | for( 0 => int i; i < bindings.size(); 2 +=> i) | |
115 | { | |
116 | (bindings[i]$MalSymbol).value() => string symbol; | |
117 | EVAL(bindings[i+1], let_env) @=> MalObject value; | |
118 | ||
119 | if( value.type == "error" ) | |
120 | { | |
121 | return value; | |
122 | } | |
123 | ||
124 | let_env.set(symbol, value); | |
125 | } | |
126 | ||
127 | let_env @=> env; | |
128 | ast[2] @=> m; | |
129 | continue; // TCO | |
130 | } | |
131 | else if( a0 == "quote" ) | |
132 | { | |
133 | return ast[1]; | |
134 | } | |
135 | else if( a0 == "quasiquote" ) | |
136 | { | |
137 | quasiquote(ast[1]) @=> m; | |
138 | continue; // TCO | |
139 | } | |
140 | else if( a0 == "do" ) | |
141 | { | |
98c1ecf2 | 142 | MalObject.slice(ast, 1, ast.size()-1) @=> MalObject forms[]; |
34f7b3db VS |
143 | eval_ast(MalList.create(forms), env) @=> MalObject value; |
144 | ||
145 | if( value.type == "error" ) | |
146 | { | |
147 | return value; | |
148 | } | |
149 | ||
150 | // HACK: this assumes do gets at least one argument... | |
151 | ast[ast.size()-1] @=> m; | |
152 | continue; // TCO | |
153 | } | |
154 | else if( a0 == "if" ) | |
155 | { | |
156 | EVAL(ast[1], env) @=> MalObject condition; | |
157 | ||
158 | if( condition.type == "error" ) | |
159 | { | |
160 | return condition; | |
161 | } | |
162 | ||
163 | if( !(condition.type == "nil") && !(condition.type == "false") ) | |
164 | { | |
165 | ast[2] @=> m; | |
166 | continue; // TCO | |
167 | } | |
168 | else | |
169 | { | |
170 | if( ast.size() < 4 ) | |
171 | { | |
172 | return Constants.NIL; | |
173 | } | |
174 | else | |
175 | { | |
176 | ast[3] @=> m; | |
177 | continue; // TCO | |
178 | } | |
179 | } | |
180 | } | |
181 | else if( a0 == "fn*" ) | |
182 | { | |
183 | (ast[1]$MalList).value() @=> MalObject arg_values[]; | |
184 | string args[arg_values.size()]; | |
185 | ||
186 | for( 0 => int i; i < arg_values.size(); i++ ) | |
187 | { | |
188 | (arg_values[i]$MalSymbol).value() => args[i]; | |
189 | } | |
190 | ||
191 | ast[2] @=> MalObject _ast; | |
192 | ||
193 | return Func.create(env, args, _ast); | |
194 | } | |
195 | } | |
196 | ||
197 | eval_ast(m, env) @=> MalObject result; | |
198 | if( result.type == "error" ) | |
199 | { | |
200 | return result; | |
201 | } | |
202 | ||
203 | (result$MalList).value() @=> MalObject values[]; | |
204 | values[0].type => string type; | |
205 | MalObject.slice(values, 1) @=> MalObject args[]; | |
206 | ||
207 | if( type == "subr" ) | |
208 | { | |
209 | values[0]$MalSubr @=> MalSubr subr; | |
98c1ecf2 | 210 | return subr.call(args); |
34f7b3db VS |
211 | } |
212 | else // type == "func" | |
213 | { | |
214 | values[0]$Func @=> Func func; | |
215 | Env.create(func.env, func.args, args) @=> Env eval_env; | |
216 | eval_env @=> env; | |
217 | func.ast @=> m; | |
218 | continue; // TCO | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | fun MalObject eval_ast(MalObject m, Env env) | |
224 | { | |
225 | m.type => string type; | |
226 | ||
227 | if( type == "symbol" ) | |
228 | { | |
229 | (m$MalSymbol).value() => string symbol; | |
230 | return env.get(symbol); | |
231 | } | |
232 | else if( type == "list" || type == "vector" || type == "hashmap" ) | |
233 | { | |
234 | (m$MalList).value() @=> MalObject values[]; | |
235 | MalObject results[values.size()]; | |
236 | ||
237 | if( type != "hashmap" ) | |
238 | { | |
239 | for( 0 => int i; i < values.size(); i++ ) | |
240 | { | |
241 | EVAL(values[i], env) @=> MalObject result; | |
242 | ||
243 | if( result.type == "error" ) | |
244 | { | |
245 | return result; | |
246 | } | |
247 | ||
248 | result @=> results[i]; | |
249 | } | |
250 | } | |
251 | else | |
252 | { | |
253 | for( 0 => int i; i < values.size(); i++ ) | |
254 | { | |
255 | if( i % 2 == 0 ) | |
256 | { | |
257 | values[i] @=> results[i]; | |
258 | } | |
259 | else | |
260 | { | |
261 | EVAL(values[i], env) @=> results[i]; | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
266 | if( type == "list" ) | |
267 | { | |
268 | return MalList.create(results); | |
269 | } | |
270 | else if( type == "vector" ) | |
271 | { | |
272 | return MalVector.create(results); | |
273 | } | |
274 | else if( type == "hashmap" ) | |
275 | { | |
276 | return MalHashMap.create(results); | |
277 | } | |
278 | } | |
279 | else | |
280 | { | |
281 | return m; | |
282 | } | |
283 | } | |
284 | ||
285 | fun string PRINT(MalObject m) | |
286 | { | |
287 | return Printer.pr_str(m, true); | |
288 | } | |
289 | ||
290 | Env.create(null) @=> Env repl_env; | |
291 | for( 0 => int i; i < Core.names.size(); i++ ) | |
292 | { | |
293 | Core.names[i] => string name; | |
294 | repl_env.set(name, Core.ns[name]); | |
295 | } | |
296 | ||
98c1ecf2 VS |
297 | // HACK, HACK, HACK |
298 | class MalEval extends MalSubr | |
299 | { | |
300 | fun MalObject call(MalObject args[]) | |
301 | { | |
302 | args[0] @=> MalObject m; | |
303 | return EVAL(args[0], repl_env); | |
304 | } | |
305 | ||
306 | fun MalObject apply(MalObject f, MalObject args[]) | |
307 | { | |
308 | if( f.type == "subr" ) | |
309 | { | |
310 | return (f$MalSubr).call(args); | |
311 | } | |
312 | else // f.type == "func" | |
313 | { | |
314 | f$Func @=> Func func; | |
315 | Env.create(func.env, func.args, args) @=> Env eval_env; | |
316 | return EVAL(func.ast, eval_env); | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | new MalEval @=> MalEval eval; | |
322 | repl_env.set("eval", new MalEval); | |
323 | eval @=> (repl_env.get("swap!")$MalSubr).eval; | |
34f7b3db VS |
324 | |
325 | fun MalObject[] MalArgv(string args[]) | |
326 | { | |
1b349ccb | 327 | MalObject values[0]; |
34f7b3db VS |
328 | |
329 | for( 1 => int i; i < args.size(); i++ ) | |
330 | { | |
1b349ccb | 331 | values << MalString.create(args[i]); |
34f7b3db VS |
332 | } |
333 | ||
334 | return values; | |
335 | } | |
336 | ||
337 | // NOTE: normally I'd use \0, but strings are null-terminated... | |
338 | String.split(Std.getenv("CHUCK_ARGS"), "\a") @=> string args[]; | |
339 | repl_env.set("*ARGV*", MalList.create(MalArgv(args))); | |
340 | ||
98c1ecf2 VS |
341 | fun string errorMessage(MalObject m) |
342 | { | |
343 | (m$MalError).value() @=> MalObject value; | |
dd7a4f55 | 344 | return "exception: " + Printer.pr_str(value, true); |
98c1ecf2 VS |
345 | } |
346 | ||
34f7b3db VS |
347 | fun string rep(string input) |
348 | { | |
349 | READ(input) @=> MalObject m; | |
350 | ||
351 | if( m.type == "error" ) | |
352 | { | |
98c1ecf2 | 353 | return errorMessage(m); |
34f7b3db VS |
354 | } |
355 | ||
356 | EVAL(m, repl_env) @=> MalObject result; | |
357 | if( result.type == "error" ) | |
358 | { | |
98c1ecf2 | 359 | return errorMessage(result); |
34f7b3db VS |
360 | } |
361 | ||
362 | return PRINT(result); | |
363 | } | |
364 | ||
365 | rep("(def! not (fn* (a) (if a false true)))"); | |
e6d41de4 | 366 | rep("(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \"\nnil)\")))))"); |
34f7b3db VS |
367 | |
368 | fun void main() | |
369 | { | |
2e3d457e | 370 | int done; |
34f7b3db | 371 | |
2e3d457e | 372 | while( !done ) |
34f7b3db | 373 | { |
2e3d457e | 374 | Readline.readline("user> ") => string input; |
34f7b3db | 375 | |
2e3d457e | 376 | if( input != null ) |
34f7b3db | 377 | { |
2e3d457e VS |
378 | rep(input) => string output; |
379 | ||
380 | if( output == "empty input" ) | |
381 | { | |
382 | // proceed immediately with prompt | |
383 | } | |
384 | else | |
385 | { | |
386 | Util.println(output); | |
387 | } | |
34f7b3db VS |
388 | } |
389 | else | |
390 | { | |
2e3d457e | 391 | true => done; |
34f7b3db VS |
392 | } |
393 | } | |
394 | } | |
395 | ||
35163c1b | 396 | if( args.size() > 0 ) |
34f7b3db | 397 | { |
35163c1b | 398 | args[0] => string filename; |
34f7b3db VS |
399 | rep("(load-file \"" + filename + "\")"); |
400 | } | |
401 | else | |
402 | { | |
403 | main(); | |
404 | } |