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nullable: type, compile and test 'as(not null)'
[nit.git] / src / compiling / compiling_methods.nit
1 # This file is part of NIT ( http://www.nitlanguage.org ).
2 #
3 # Copyright 2008 Jean Privat <jean@pryen.org>
4 #
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
8 #
9 # http://www.apache.org/licenses/LICENSE-2.0
10 #
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16
17 # Compile method bodies, statments and expressions to C.
18 package compiling_methods
19
20 import compiling_base
21 private import syntax
22
23 redef class CompilerVisitor
24 # Compile a statment node
25 meth compile_stmt(n: PExpr)
26 do
27 if n == null then return
28 #add_instr("/* Compile stmt {n.locate} */")
29 n.prepare_compile_stmt(self)
30 var i = cfc._variable_index
31 n.compile_stmt(self)
32 cfc._variable_index = i
33 end
34
35 # Compile is expression node
36 meth compile_expr(n: PExpr): String
37 do
38 #add_instr("/* Compile expr {n.locate} */")
39 var i = cfc._variable_index
40 var s = n.compile_expr(self)
41 cfc._variable_index = i
42 if s[0] == ' ' or cfc.is_valid_variable(s) then
43 return s
44 end
45 var v = cfc.get_var("Result")
46 add_assignment(v, s)
47 return v
48 end
49
50 # Ensure that a c expression is a var
51 meth ensure_var(s: String, comment: String): String
52 do
53 if cfc.is_valid_variable(s) then
54 add_instr("/* Ensure var {s}: {comment}*/")
55 return s
56 end
57 var v = cfc.get_var(null)
58 add_assignment(v, "{s} /* Ensure var: {comment}*/")
59 return v
60 end
61
62 # Add a assignment between a variable and an expression
63 meth add_assignment(v: String, s: String)
64 do
65 if v != s then
66 add_instr("{v} = {s};")
67 end
68 end
69
70 readable writable attr _cfc: CFunctionContext
71
72 readable writable attr _nmc: NitMethodContext
73
74 # C outputs written outside the current C function.
75 readable writable attr _out_contexts: Array[CContext] = new Array[CContext]
76
77 # Generate an fprintf to display an error location
78 meth printf_locate_error(node: PNode): String
79 do
80 var s = new Buffer.from("fprintf(stderr, \"")
81 if nmc != null then s.append(" in %s")
82 s.append(" (%s:%d)\\n\", ")
83 if nmc != null then s.append("LOCATE_{nmc.method.cname}, ")
84 s.append("LOCATE_{module.name}, {node.line_number});")
85 return s.to_s
86 end
87
88 meth invoke_super_init_calls_after(start_prop: MMMethod)
89 do
90 var n = nmc.method.node
91 assert n isa AConcreteInitPropdef
92
93 if n.super_init_calls.is_empty then return
94 var i = 0
95 var j = 0
96 #var s = ""
97 if start_prop != null then
98 while n.super_init_calls[i] != start_prop do
99 #s.append(" {n.super_init_calls[i]}")
100 i += 1
101 end
102 i += 1
103 #s.append(" {start_prop}")
104
105 while n.explicit_super_init_calls[j] != start_prop do
106 j += 1
107 end
108 j += 1
109 end
110 var stop_prop: MMMethod = null
111 if j < n.explicit_super_init_calls.length then
112 stop_prop = n.explicit_super_init_calls[j]
113 end
114 var l = n.super_init_calls.length
115 #s.append(" [")
116 while i < l do
117 var p = n.super_init_calls[i]
118 if p == stop_prop then break
119 var cargs = new Array[String]
120 if p.signature.arity == 0 then
121 cargs.add(cfc.varname(nmc.method_params[0]))
122 else
123 for va in nmc.method_params do
124 cargs.add(cfc.varname(va))
125 end
126 end
127 #s.append(" {p}")
128 p.compile_stmt_call(self, cargs)
129 i += 1
130 end
131 #s.append(" ]")
132 #while i < l do
133 # s.append(" {n.super_init_calls[i]}")
134 # i += 1
135 #end
136 #if stop_prop != null then s.append(" (stop at {stop_prop})")
137 #n.printl("implicit calls in {n.method}: {s}")
138 end
139 end
140
141 # A C function currently written
142 class CFunctionContext
143 readable attr _visitor: CompilerVisitor
144
145 # Next available variable number
146 attr _variable_index: Int = 0
147
148 # Total number of variable
149 attr _variable_index_max: Int = 0
150
151 # Association between nit variable and the corrsponding c variable index
152 attr _varindexes: Map[Variable, Int] = new HashMap[Variable, Int]
153
154 # Are we currenlty in a closure definition?
155 readable writable attr _closure: NitMethodContext = null
156
157 # Return the cvariable of a Nit variable
158 meth varname(v: Variable): String
159 do
160 if v isa ClosureVariable then
161 return closure_variable(_varindexes[v])
162 else
163 return variable(_varindexes[v])
164 end
165 end
166
167 # Return the next available variable
168 meth get_var(comment: String): String
169 do
170 var v = variable(_variable_index)
171 _variable_index = _variable_index + 1
172 if _variable_index > _variable_index_max then
173 _variable_index_max = _variable_index
174 end
175 if comment != null then
176 visitor.add_instr("/* Register {v}: {comment} */")
177 end
178 return v
179 end
180
181 meth register_variable(v: Variable): String
182 do
183 _varindexes[v] = _variable_index
184 var s = get_var("Local variable")
185 return s
186 end
187
188 # Next available closure variable number
189 attr _closurevariable_index: Int = 0
190
191 meth register_closurevariable(v: ClosureVariable): String
192 do
193 var s = "closurevariable[{_closurevariable_index}]"
194 _varindexes[v] = _closurevariable_index
195 _closurevariable_index += 1
196 if _closure != null then
197 return "(closctx->{s})"
198 else
199 return s
200 end
201 end
202
203 # Return the ith cvariable
204 protected meth variable(i: Int): String
205 do
206 if closure != null then
207 var vn = once new Array[String]
208 if vn.length <= i then
209 for j in [vn.length..i] do
210 vn[j] = "(closctx->variable[{j}])"
211 end
212 end
213 return vn[i]
214 else
215 var vn = once new Array[String]
216 if vn.length <= i then
217 for j in [vn.length..i] do
218 vn[j] = "variable[{j}]"
219 end
220 end
221 return vn[i]
222 end
223 end
224
225 # Return the ith closurevariable
226 protected meth closure_variable(i: Int): String
227 do
228 if closure != null then
229 return "(closctx->closurevariable[{i}])"
230 else
231 return "closurevariable[{i}]"
232 end
233 end
234
235 # Is s a valid variable
236 protected meth is_valid_variable(s: String): Bool
237 do
238 for i in [0.._variable_index[ do
239 if s == variable(i) then return true
240 end
241 return false
242 end
243
244 # Mark the variable available
245 meth free_var(v: String)
246 do
247 # FIXME: So ugly..
248 if v == variable(_variable_index-1) then
249 _variable_index = _variable_index - 1
250 end
251 end
252
253 # Generate the local variable declarations
254 # To use at the end of the C function once all variables are known
255 meth generate_var_decls
256 do
257 if _variable_index_max > 0 then
258 visitor.add_decl("val_t variable[{_variable_index_max}];")
259 else
260 visitor.add_decl("val_t *variable = NULL;")
261 end
262 if _closurevariable_index > 0 then
263 visitor.add_decl("struct WBT_ *closurevariable[{_closurevariable_index}];")
264 else
265 visitor.add_decl("struct WBT_ **closurevariable = NULL;")
266 end
267 end
268
269 init(v: CompilerVisitor) do _visitor = v
270 end
271
272 # A Nit method currenlty compiled
273 class NitMethodContext
274 # Current method compiled
275 readable attr _method: MMSrcMethod
276
277 # Association between parameters and the corresponding variables
278 readable writable attr _method_params: Array[ParamVariable]
279
280 # Where a nit return must branch
281 readable writable attr _return_label: String
282
283 # Where a nit break must branch
284 readable writable attr _break_label: String
285
286 # Where a nit continue must branch
287 readable writable attr _continue_label: String
288
289 # Variable where a functionnal nit return must store its value
290 readable writable attr _return_value: String
291
292 # Variable where a functionnal nit break must store its value
293 readable writable attr _break_value: String
294
295 # Variable where a functionnal nit continue must store its value
296 readable writable attr _continue_value: String
297
298 init(method: MMSrcMethod)
299 do
300 _method = method
301 end
302 end
303
304 ###############################################################################
305
306 redef class ClosureVariable
307 readable writable attr _ctypename: String
308 end
309
310 redef class MMMethod
311 # Compile as an expression.
312 # require that signature.return_type != null
313 meth compile_expr_call(v: CompilerVisitor, cargs: Array[String]): String
314 do
315 assert signature.return_type != null
316 var s = intern_compile_call(v, cargs)
317 assert s != null
318 return s
319 end
320
321 # Compile as a statement.
322 # require that signature.return_type == null
323 meth compile_stmt_call(v: CompilerVisitor, cargs: Array[String])
324 do
325 assert signature.return_type == null
326 var s = intern_compile_call(v, cargs)
327 assert s == null
328 end
329
330 # Compile a call on self for given arguments
331 # Most calls are compiled with a table access,
332 # primitive calles are inlined
333 # == and != are guarded and possibly inlined
334 private meth intern_compile_call(v: CompilerVisitor, cargs: Array[String]): String
335 do
336 var i = self
337 if i isa MMSrcMethod then
338 if i isa MMMethSrcMethod and i.node isa AInternMethPropdef or
339 (i.local_class.name == (once "Array".to_symbol) and name == (once "[]".to_symbol))
340 then
341 var e = i.do_compile_inside(v, cargs)
342 return e
343 end
344 end
345 var ee = once "==".to_symbol
346 var ne = once "!=".to_symbol
347 if name == ne then
348 var eqp = signature.recv.local_class.select_method(ee)
349 var eqcall = eqp.compile_expr_call(v, cargs)
350 return "TAG_Bool(!UNTAG_Bool({eqcall}))"
351 end
352 if global.is_init then
353 cargs = cargs.to_a
354 cargs.add("init_table /*YYY*/")
355 end
356
357 var m = "{global.meth_call}({cargs[0]})"
358 var vcall = "{m}({cargs.join(", ")}) /*{local_class}::{name}*/"
359 if name == ee then
360 vcall = "UNTAG_Bool({vcall})"
361 var obj = once "Object".to_symbol
362 if i.local_class.name == obj then
363 vcall = "(({m}=={i.cname})?(IS_EQUAL_NN({cargs[0]},{cargs[1]})):({vcall}))"
364 end
365 vcall = "TAG_Bool(({cargs.first} == {cargs[1]}) || (({cargs.first} != NIT_NULL) && {vcall}))"
366 end
367 if signature.return_type != null then
368 return vcall
369 else
370 v.add_instr(vcall + ";")
371 return null
372 end
373 end
374
375 # Compile a call on self for given arguments and given closures
376 meth compile_call_and_closures(v: CompilerVisitor, cargs: Array[String], clos_defs: Array[PClosureDef]): String
377 do
378 var ve: String = null
379 var arity = 0
380 if clos_defs != null then arity = clos_defs.length
381
382 # Prepare result value.
383 # In case of procedure, the return value is still used to intercept breaks
384 var old_bv = v.nmc.break_value
385 ve = v.cfc.get_var("Closure return value and escape marker")
386 v.nmc.break_value = ve
387
388 # Compile closure to c function
389 var realcargs = new Array[String] # Args to pass to the C function call
390 var closcns = new Array[String] # Closure C structure names
391 realcargs.add_all(cargs)
392 for i in [0..arity[ do
393 var cn = clos_defs[i].compile_closure(v, closure_cname(i))
394 closcns.add(cn)
395 realcargs.add(cn)
396 end
397 for i in [arity..signature.closures.length[ do
398 realcargs.add("NULL")
399 end
400
401 v.nmc.break_value = old_bv
402
403 # Call
404 var e = intern_compile_call(v, realcargs)
405 if e != null then
406 v.add_assignment(ve, e)
407 e = ve
408 end
409
410 # Intercept returns and breaks
411 for i in [0..arity[ do
412 # A break or a return is intercepted
413 v.add_instr("if ({closcns[i]}->has_broke != NULL) \{")
414 v.indent
415 # A passtrought break or a return is intercepted: go the the next closure
416 v.add_instr("if ({closcns[i]}->has_broke != &({ve})) \{")
417 v.indent
418 if v.cfc.closure == v.nmc then v.add_instr("closctx->has_broke = {closcns[i]}->has_broke; closctx->broke_value = {closcns[i]}->broke_value;")
419 v.add_instr("goto {v.nmc.return_label};")
420 v.unindent
421 # A direct break is interpected
422 if e != null then
423 # overwrite the returned value in a function
424 v.add_instr("\} else {ve} = {closcns[i]}->broke_value;")
425 else
426 # Do nothing in a procedure
427 v.add_instr("\}")
428 end
429 v.unindent
430 v.add_instr("\}")
431 end
432 return e
433 end
434
435 # Compile a call as constructor with given args
436 meth compile_constructor_call(v: CompilerVisitor, recvtype: MMType, cargs: Array[String]): String
437 do
438 return "NEW_{recvtype.local_class}_{global.intro.cname}({cargs.join(", ")}) /*new {recvtype}*/"
439 end
440
441 # Compile a call as call-next-method on self with given args
442 meth compile_super_call(v: CompilerVisitor, cargs: Array[String]): String
443 do
444 var m = "{super_meth_call}({cargs[0]})"
445 var vcall = "{m}({cargs.join(", ")}) /*super {local_class}::{name}*/"
446 return vcall
447 end
448
449 # Cname of the i-th closure C struct type
450 protected meth closure_cname(i: Int): String
451 do
452 return "FWBT_{cname}_{i}"
453 end
454 end
455
456 redef class MMAttribute
457 # Compile an acces on selffor a given reciever.
458 # Result is a valid C left-value for assigment
459 meth compile_access(v: CompilerVisitor, recv: String): String
460 do
461 return "{global.attr_access}({recv}) /*{local_class}::{name}*/"
462 end
463 end
464
465 redef class MMLocalProperty
466 # Compile the property as a C property
467 meth compile_property_to_c(v: CompilerVisitor) do end
468 end
469
470 redef class MMSrcMethod
471
472 # Compile and declare the signature to C
473 protected meth decl_csignature(v: CompilerVisitor, args: Array[String]): String
474 do
475 var params = new Array[String]
476 params.add("val_t {args[0]}")
477 for i in [0..signature.arity[ do
478 var p = "val_t {args[i+1]}"
479 params.add(p)
480 end
481
482 var first_closure_index = signature.arity + 1 # Wich parameter is the first closure
483 for i in [0..signature.closures.length[ do
484 var closcn = closure_cname(i)
485 var cs = signature.closures[i].signature # Closure signature
486 var subparams = new Array[String] # Parameters of the closure
487 subparams.add("struct WBT_ *")
488 for j in [0..cs.arity[ do
489 var p = "val_t"
490 subparams.add(p)
491 end
492 var r = "void"
493 if cs.return_type != null then r = "val_t"
494 params.add("struct WBT_ *{args[first_closure_index+i]}")
495 v.add_decl("typedef {r} (*{closcn})({subparams.join(", ")});")
496 end
497
498 if global.is_init then
499 params.add("int* init_table")
500 end
501
502 var ret: String
503 if signature.return_type != null then
504 ret = "val_t"
505 else
506 ret = "void"
507 end
508
509 var p = params.join(", ")
510 var s = "{ret} {cname}({p})"
511 v.add_decl("typedef {ret} (* {cname}_t)({p});")
512 v.add_decl(s + ";")
513 return s
514 end
515
516 redef meth compile_property_to_c(v)
517 do
518 v.cfc = new CFunctionContext(v)
519
520 var args = new Array[String]
521 args.add(" self")
522 for i in [0..signature.arity[ do
523 args.add(" param{i}")
524 end
525 for i in [0..signature.closures.length[ do
526 args.add(" wd{i}")
527 end
528 var cs = decl_csignature(v, args)
529 v.add_decl("#define LOCATE_{cname} \"{full_name}\"")
530
531 v.add_instr("{cs} \{")
532 v.indent
533 var ctx_old = v.ctx
534 v.ctx = new CContext
535
536 v.out_contexts.clear
537
538 var ln = 0
539 var s = self
540 if s.node != null then ln = s.node.line_number
541 v.add_decl("struct trace_t trace = \{NULL, NULL, {ln}, LOCATE_{cname}};")
542 v.add_instr("trace.prev = tracehead; tracehead = &trace;")
543 v.add_instr("trace.file = LOCATE_{module.name};")
544 var s = do_compile_inside(v, args)
545 v.add_instr("tracehead = trace.prev;")
546 if s == null then
547 v.add_instr("return;")
548 else
549 v.add_instr("return {s};")
550 end
551
552 v.cfc.generate_var_decls
553
554 ctx_old.append(v.ctx)
555 v.ctx = ctx_old
556 v.unindent
557 v.add_instr("}")
558
559 for ctx in v.out_contexts do v.ctx.merge(ctx)
560 end
561
562 # Compile the method body inline
563 meth do_compile_inside(v: CompilerVisitor, params: Array[String]): String is abstract
564 end
565
566 redef class MMReadImplementationMethod
567 redef meth do_compile_inside(v, params)
568 do
569 return node.prop.compile_access(v, params[0])
570 end
571 end
572
573 redef class MMWriteImplementationMethod
574 redef meth do_compile_inside(v, params)
575 do
576 v.add_assignment(node.prop.compile_access(v, params[0]), params[1])
577 return null
578 end
579 end
580
581 redef class MMMethSrcMethod
582 redef meth do_compile_inside(v, params)
583 do
584 return node.do_compile_inside(v, self, params)
585 end
586 end
587
588 redef class MMImplicitInit
589 redef meth do_compile_inside(v, params)
590 do
591 var f = params.length - unassigned_attributes.length
592 var recv = params.first
593 for sp in super_inits do
594 assert sp isa MMMethod
595 var args_recv = [recv]
596 if sp == super_init then
597 var args = new Array[String].with_capacity(f)
598 args.add(recv)
599 for i in [1..f[ do
600 args.add(params[i])
601 end
602 sp.compile_stmt_call(v, args)
603 else
604 sp.compile_stmt_call(v, args_recv)
605 end
606 end
607 for i in [f..params.length[ do
608 var attribute = unassigned_attributes[i-f]
609 v.add_assignment(attribute.compile_access(v, recv), params[i])
610 end
611 return null
612 end
613 end
614
615 redef class MMType
616 # Compile a subtype check to self
617 # Return a NIT Bool
618 meth compile_cast(v: CompilerVisitor, recv: String): String
619 do
620 # Fixme: handle formaltypes
621 var g = local_class.global
622 return "TAG_Bool(({recv}==NIT_NULL) || VAL_ISA({recv}, {g.color_id}, {g.id_id})) /*cast {self}*/"
623 end
624
625 # Compile a cast assertion
626 meth compile_type_check(v: CompilerVisitor, recv: String, n: PNode)
627 do
628 # Fixme: handle formaltypes
629 var g = local_class.global
630 v.add_instr("if (({recv}!=NIT_NULL) && !VAL_ISA({recv}, {g.color_id}, {g.id_id})) \{ fprintf(stderr, \"Cast failled\"); {v.printf_locate_error(n)} nit_exit(1); } /*cast {self}*/;")
631 end
632
633 # Compile a notnull cast assertion
634 meth compile_notnull_check(v: CompilerVisitor, recv: String, n: PNode)
635 do
636 if is_nullable then
637 v.add_instr("if (({recv}==NIT_NULL)) \{ fprintf(stderr, \"Cast failled\"); {v.printf_locate_error(n)} nit_exit(1); } /*cast {self}*/;")
638 end
639 end
640 end
641
642 ###############################################################################
643
644 redef class AMethPropdef
645 # Compile the method body
646 meth do_compile_inside(v: CompilerVisitor, method: MMSrcMethod, params: Array[String]): String is abstract
647 end
648
649 redef class PSignature
650 meth compile_parameters(v: CompilerVisitor, orig_sig: MMSignature, params: Array[String]) is abstract
651 end
652
653 redef class ASignature
654 redef meth compile_parameters(v: CompilerVisitor, orig_sig: MMSignature, params: Array[String])
655 do
656 for ap in n_params do
657 var cname = v.cfc.register_variable(ap.variable)
658 v.nmc.method_params.add(ap.variable)
659 var orig_type = orig_sig[ap.position]
660 if not orig_type < ap.variable.stype then
661 # FIXME: do not test always
662 # FIXME: handle formal types
663 v.add_instr("/* check if p<{ap.variable.stype} with p:{orig_type} */")
664 ap.variable.stype.compile_type_check(v, params[ap.position], ap)
665 end
666 v.add_assignment(cname, params[ap.position])
667 end
668 for i in [0..n_closure_decls.length[ do
669 var wd = n_closure_decls[i]
670 var cname = v.cfc.register_closurevariable(wd.variable)
671 wd.variable.ctypename = v.nmc.method.closure_cname(i)
672 v.add_assignment(cname, "{params[orig_sig.arity + i]}")
673 end
674 end
675 end
676
677 redef class AConcreteMethPropdef
678 redef meth do_compile_inside(v, method, params)
679 do
680 var old_nmc = v.nmc
681 v.nmc = new NitMethodContext(method)
682
683 var selfcname = v.cfc.register_variable(self_var)
684 v.add_assignment(selfcname, params[0])
685 params.shift
686 v.nmc.method_params = [self_var]
687
688 if n_signature != null then
689 var orig_meth: MMLocalProperty = method.global.intro
690 var orig_sig = orig_meth.signature_for(method.signature.recv)
691 n_signature.compile_parameters(v, orig_sig, params)
692 end
693
694 var itpos: String = null
695 if self isa AConcreteInitPropdef then
696 itpos = "VAL2OBJ({selfcname})->vft[{method.local_class.global.init_table_pos_id}].i"
697 # v.add_instr("printf(\"{method.full_name}: inittable[%d] = %d\\n\", {itpos}, init_table[{itpos}]);")
698 v.add_instr("if (init_table[{itpos}]) return;")
699 end
700
701 v.nmc.return_label = "return_label{v.new_number}"
702 v.nmc.return_value = v.cfc.get_var("Method return value and escape marker")
703 if self isa AConcreteInitPropdef then
704 v.invoke_super_init_calls_after(null)
705 end
706 v.compile_stmt(n_block)
707 v.add_instr("{v.nmc.return_label}: while(false);")
708 if self isa AConcreteInitPropdef then
709 v.add_instr("init_table[{itpos}] = 1;")
710 end
711
712 var ret: String = null
713 if method.signature.return_type != null then
714 ret = v.nmc.return_value
715 end
716
717 v.nmc = old_nmc
718 return ret
719 end
720 end
721
722 redef class ADeferredMethPropdef
723 redef meth do_compile_inside(v, method, params)
724 do
725 v.add_instr("fprintf(stderr, \"Deferred method called\");")
726 v.add_instr(v.printf_locate_error(self))
727 v.add_instr("nit_exit(1);")
728 if method.signature.return_type != null then
729 return("NIT_NULL")
730 else
731 return null
732 end
733 end
734 end
735
736 redef class AExternMethPropdef
737 redef meth do_compile_inside(v, method, params)
738 do
739 var ename = "{method.module.name}_{method.local_class.name}_{method.local_class.name}_{method.name}_{method.signature.arity}"
740 if n_extern != null then
741 ename = n_extern.text
742 ename = ename.substring(1, ename.length-2)
743 end
744 var sig = method.signature
745 if params.length != sig.arity + 1 then
746 printl("par:{params.length} sig:{sig.arity}")
747 end
748 var args = new Array[String]
749 args.add(sig.recv.unboxtype(params[0]))
750 for i in [0..sig.arity[ do
751 args.add(sig[i].unboxtype(params[i+1]))
752 end
753 var s = "{ename}({args.join(", ")})"
754 if sig.return_type != null then
755 return sig.return_type.boxtype(s)
756 else
757 v.add_instr("{s};")
758 return null
759 end
760 end
761 end
762
763 redef class AInternMethPropdef
764 redef meth do_compile_inside(v, method, p)
765 do
766 var c = method.local_class.name
767 var n = method.name
768 var s: String = null
769 if c == once "Int".to_symbol then
770 if n == once "object_id".to_symbol then
771 s = "{p[0]}"
772 else if n == once "unary -".to_symbol then
773 s = "TAG_Int(-UNTAG_Int({p[0]}))"
774 else if n == once "output".to_symbol then
775 v.add_instr("printf(\"%ld\\n\", UNTAG_Int({p[0]}));")
776 else if n == once "ascii".to_symbol then
777 s = "TAG_Char(UNTAG_Int({p[0]}))"
778 else if n == once "succ".to_symbol then
779 s = "TAG_Int(UNTAG_Int({p[0]})+1)"
780 else if n == once "prec".to_symbol then
781 s = "TAG_Int(UNTAG_Int({p[0]})-1)"
782 else if n == once "to_f".to_symbol then
783 s = "BOX_Float((float)UNTAG_Int({p[0]}))"
784 else if n == once "+".to_symbol then
785 s = "TAG_Int(UNTAG_Int({p[0]})+UNTAG_Int({p[1]}))"
786 else if n == once "-".to_symbol then
787 s = "TAG_Int(UNTAG_Int({p[0]})-UNTAG_Int({p[1]}))"
788 else if n == once "*".to_symbol then
789 s = "TAG_Int(UNTAG_Int({p[0]})*UNTAG_Int({p[1]}))"
790 else if n == once "/".to_symbol then
791 s = "TAG_Int(UNTAG_Int({p[0]})/UNTAG_Int({p[1]}))"
792 else if n == once "%".to_symbol then
793 s = "TAG_Int(UNTAG_Int({p[0]})%UNTAG_Int({p[1]}))"
794 else if n == once "<".to_symbol then
795 s = "TAG_Bool(UNTAG_Int({p[0]})<UNTAG_Int({p[1]}))"
796 else if n == once ">".to_symbol then
797 s = "TAG_Bool(UNTAG_Int({p[0]})>UNTAG_Int({p[1]}))"
798 else if n == once "<=".to_symbol then
799 s = "TAG_Bool(UNTAG_Int({p[0]})<=UNTAG_Int({p[1]}))"
800 else if n == once ">=".to_symbol then
801 s = "TAG_Bool(UNTAG_Int({p[0]})>=UNTAG_Int({p[1]}))"
802 else if n == once "lshift".to_symbol then
803 s = "TAG_Int(UNTAG_Int({p[0]})<<UNTAG_Int({p[1]}))"
804 else if n == once "rshift".to_symbol then
805 s = "TAG_Int(UNTAG_Int({p[0]})>>UNTAG_Int({p[1]}))"
806 else if n == once "==".to_symbol then
807 s = "TAG_Bool(({p[0]})==({p[1]}))"
808 else if n == once "!=".to_symbol then
809 s = "TAG_Bool(({p[0]})!=({p[1]}))"
810 end
811 else if c == once "Float".to_symbol then
812 if n == once "object_id".to_symbol then
813 s = "TAG_Int((bigint)UNBOX_Float({p[0]}))"
814 else if n == once "unary -".to_symbol then
815 s = "BOX_Float(-UNBOX_Float({p[0]}))"
816 else if n == once "output".to_symbol then
817 v.add_instr("printf(\"%f\\n\", UNBOX_Float({p[0]}));")
818 else if n == once "to_i".to_symbol then
819 s = "TAG_Int((bigint)UNBOX_Float({p[0]}))"
820 else if n == once "+".to_symbol then
821 s = "BOX_Float(UNBOX_Float({p[0]})+UNBOX_Float({p[1]}))"
822 else if n == once "-".to_symbol then
823 s = "BOX_Float(UNBOX_Float({p[0]})-UNBOX_Float({p[1]}))"
824 else if n == once "*".to_symbol then
825 s = "BOX_Float(UNBOX_Float({p[0]})*UNBOX_Float({p[1]}))"
826 else if n == once "/".to_symbol then
827 s = "BOX_Float(UNBOX_Float({p[0]})/UNBOX_Float({p[1]}))"
828 else if n == once "<".to_symbol then
829 s = "TAG_Bool(UNBOX_Float({p[0]})<UNBOX_Float({p[1]}))"
830 else if n == once ">".to_symbol then
831 s = "TAG_Bool(UNBOX_Float({p[0]})>UNBOX_Float({p[1]}))"
832 else if n == once "<=".to_symbol then
833 s = "TAG_Bool(UNBOX_Float({p[0]})<=UNBOX_Float({p[1]}))"
834 else if n == once ">=".to_symbol then
835 s = "TAG_Bool(UNBOX_Float({p[0]})>=UNBOX_Float({p[1]}))"
836 end
837 else if c == once "Char".to_symbol then
838 if n == once "object_id".to_symbol then
839 s = "TAG_Int(UNTAG_Char({p[0]}))"
840 else if n == once "unary -".to_symbol then
841 s = "TAG_Char(-UNTAG_Char({p[0]}))"
842 else if n == once "output".to_symbol then
843 v.add_instr("printf(\"%c\", (unsigned char)UNTAG_Char({p[0]}));")
844 else if n == once "ascii".to_symbol then
845 s = "TAG_Int((unsigned char)UNTAG_Char({p[0]}))"
846 else if n == once "succ".to_symbol then
847 s = "TAG_Char(UNTAG_Char({p[0]})+1)"
848 else if n == once "prec".to_symbol then
849 s = "TAG_Char(UNTAG_Char({p[0]})-1)"
850 else if n == once "to_i".to_symbol then
851 s = "TAG_Int(UNTAG_Char({p[0]})-'0')"
852 else if n == once "+".to_symbol then
853 s = "TAG_Char(UNTAG_Char({p[0]})+UNTAG_Char({p[1]}))"
854 else if n == once "-".to_symbol then
855 s = "TAG_Char(UNTAG_Char({p[0]})-UNTAG_Char({p[1]}))"
856 else if n == once "*".to_symbol then
857 s = "TAG_Char(UNTAG_Char({p[0]})*UNTAG_Char({p[1]}))"
858 else if n == once "/".to_symbol then
859 s = "TAG_Char(UNTAG_Char({p[0]})/UNTAG_Char({p[1]}))"
860 else if n == once "%".to_symbol then
861 s = "TAG_Char(UNTAG_Char({p[0]})%UNTAG_Char({p[1]}))"
862 else if n == once "<".to_symbol then
863 s = "TAG_Bool(UNTAG_Char({p[0]})<UNTAG_Char({p[1]}))"
864 else if n == once ">".to_symbol then
865 s = "TAG_Bool(UNTAG_Char({p[0]})>UNTAG_Char({p[1]}))"
866 else if n == once "<=".to_symbol then
867 s = "TAG_Bool(UNTAG_Char({p[0]})<=UNTAG_Char({p[1]}))"
868 else if n == once ">=".to_symbol then
869 s = "TAG_Bool(UNTAG_Char({p[0]})>=UNTAG_Char({p[1]}))"
870 else if n == once "==".to_symbol then
871 s = "TAG_Bool(({p[0]})==({p[1]}))"
872 else if n == once "!=".to_symbol then
873 s = "TAG_Bool(({p[0]})!=({p[1]}))"
874 end
875 else if c == once "Bool".to_symbol then
876 if n == once "object_id".to_symbol then
877 s = "TAG_Int(UNTAG_Bool({p[0]}))"
878 else if n == once "unary -".to_symbol then
879 s = "TAG_Bool(-UNTAG_Bool({p[0]}))"
880 else if n == once "output".to_symbol then
881 v.add_instr("(void)printf(UNTAG_Bool({p[0]})?\"true\\n\":\"false\\n\");")
882 else if n == once "ascii".to_symbol then
883 s = "TAG_Bool(UNTAG_Bool({p[0]}))"
884 else if n == once "to_i".to_symbol then
885 s = "TAG_Int(UNTAG_Bool({p[0]}))"
886 else if n == once "==".to_symbol then
887 s = "TAG_Bool(({p[0]})==({p[1]}))"
888 else if n == once "!=".to_symbol then
889 s = "TAG_Bool(({p[0]})!=({p[1]}))"
890 end
891 else if c == once "NativeArray".to_symbol then
892 if n == once "object_id".to_symbol then
893 s = "TAG_Int(UNBOX_NativeArray({p[0]}))"
894 else if n == once "[]".to_symbol then
895 s = "UNBOX_NativeArray({p[0]})[UNTAG_Int({p[1]})]"
896 else if n == once "[]=".to_symbol then
897 v.add_instr("UNBOX_NativeArray({p[0]})[UNTAG_Int({p[1]})]={p[2]};")
898 else if n == once "copy_to".to_symbol then
899 v.add_instr("(void)memcpy(UNBOX_NativeArray({p[1]}), UNBOX_NativeArray({p[0]}), UNTAG_Int({p[2]})*sizeof(val_t));")
900 end
901 else if c == once "NativeString".to_symbol then
902 if n == once "object_id".to_symbol then
903 s = "TAG_Int(UNBOX_NativeString({p[0]}))"
904 else if n == once "atoi".to_symbol then
905 s = "TAG_Int(atoi(UNBOX_NativeString({p[0]})))"
906 else if n == once "[]".to_symbol then
907 s = "TAG_Char(UNBOX_NativeString({p[0]})[UNTAG_Int({p[1]})])"
908 else if n == once "[]=".to_symbol then
909 v.add_instr("UNBOX_NativeString({p[0]})[UNTAG_Int({p[1]})]=UNTAG_Char({p[2]});")
910 else if n == once "copy_to".to_symbol then
911 v.add_instr("(void)memcpy(UNBOX_NativeString({p[1]})+UNTAG_Int({p[4]}), UNBOX_NativeString({p[0]})+UNTAG_Int({p[3]}), UNTAG_Int({p[2]}));")
912 end
913 else if n == once "object_id".to_symbol then
914 s = "TAG_Int((bigint){p[0]})"
915 else if n == once "sys".to_symbol then
916 s = "(G_sys)"
917 else if n == once "is_same_type".to_symbol then
918 s = "TAG_Bool((VAL2VFT({p[0]})==VAL2VFT({p[1]})))"
919 else if n == once "exit".to_symbol then
920 v.add_instr("exit(UNTAG_Int({p[1]}));")
921 else if n == once "calloc_array".to_symbol then
922 s = "BOX_NativeArray((val_t*)malloc((UNTAG_Int({p[1]}) * sizeof(val_t))))"
923 else if n == once "calloc_string".to_symbol then
924 s = "BOX_NativeString((char*)malloc((UNTAG_Int({p[1]}) * sizeof(char))))"
925
926 else
927 v.add_instr("fprintf(stderr, \"Intern {n}\\n\"); nit_exit(1);")
928 end
929 if method.signature.return_type != null and s == null then
930 s = "NIT_NULL /*stub*/"
931 end
932 return s
933 end
934 end
935
936 ###############################################################################
937
938 redef class PExpr
939 # Compile the node as an expression
940 # Only the visitor should call it
941 meth compile_expr(v: CompilerVisitor): String is abstract
942
943 # Prepare a call of node as a statement
944 # Only the visitor should call it
945 # It's used for local variable managment
946 meth prepare_compile_stmt(v: CompilerVisitor) do end
947
948 # Compile the node as a statement
949 # Only the visitor should call it
950 meth compile_stmt(v: CompilerVisitor) do printl("Error!")
951 end
952
953 redef class ABlockExpr
954 redef meth compile_stmt(v)
955 do
956 for n in n_expr do
957 v.compile_stmt(n)
958 end
959 end
960 end
961
962 redef class AVardeclExpr
963 redef meth prepare_compile_stmt(v)
964 do
965 v.cfc.register_variable(variable)
966 end
967
968 redef meth compile_stmt(v)
969 do
970 var cname = v.cfc.varname(variable)
971 if n_expr == null then
972 v.add_instr("/*{cname} is variable {variable.name}*/")
973 else
974 var e = v.compile_expr(n_expr)
975 v.add_assignment(cname, e)
976 end
977 end
978 end
979
980 redef class AReturnExpr
981 redef meth compile_stmt(v)
982 do
983 if n_expr != null then
984 var e = v.compile_expr(n_expr)
985 v.add_assignment(v.nmc.return_value, e)
986 end
987 if v.cfc.closure == v.nmc then v.add_instr("closctx->has_broke = &({v.nmc.return_value});")
988 v.add_instr("goto {v.nmc.return_label};")
989 end
990 end
991
992 redef class ABreakExpr
993 redef meth compile_stmt(v)
994 do
995 if n_expr != null then
996 var e = v.compile_expr(n_expr)
997 v.add_assignment(v.nmc.break_value, e)
998 end
999 if v.cfc.closure == v.nmc then v.add_instr("closctx->has_broke = &({v.nmc.break_value}); closctx->broke_value = *closctx->has_broke;")
1000 v.add_instr("goto {v.nmc.break_label};")
1001 end
1002 end
1003
1004 redef class AContinueExpr
1005 redef meth compile_stmt(v)
1006 do
1007 if n_expr != null then
1008 var e = v.compile_expr(n_expr)
1009 v.add_assignment(v.nmc.continue_value, e)
1010 end
1011 v.add_instr("goto {v.nmc.continue_label};")
1012 end
1013 end
1014
1015 redef class AAbortExpr
1016 redef meth compile_stmt(v)
1017 do
1018 v.add_instr("fprintf(stderr, \"Aborted\"); {v.printf_locate_error(self)} nit_exit(1);")
1019 end
1020 end
1021
1022 redef class ADoExpr
1023 redef meth compile_stmt(v)
1024 do
1025 v.compile_stmt(n_block)
1026 end
1027 end
1028
1029 redef class AIfExpr
1030 redef meth compile_stmt(v)
1031 do
1032 var e = v.compile_expr(n_expr)
1033 v.add_instr("if (UNTAG_Bool({e})) \{ /*if*/")
1034 v.cfc.free_var(e)
1035 if n_then != null then
1036 v.indent
1037 v.compile_stmt(n_then)
1038 v.unindent
1039 end
1040 if n_else != null then
1041 v.add_instr("} else \{ /*if*/")
1042 v.indent
1043 v.compile_stmt(n_else)
1044 v.unindent
1045 end
1046 v.add_instr("}")
1047 end
1048 end
1049
1050 redef class AIfexprExpr
1051 redef meth compile_expr(v)
1052 do
1053 var e = v.compile_expr(n_expr)
1054 v.add_instr("if (UNTAG_Bool({e})) \{ /*if*/")
1055 v.cfc.free_var(e)
1056 v.indent
1057 var e = v.ensure_var(v.compile_expr(n_then), "Then value")
1058 v.unindent
1059 v.add_instr("} else \{ /*if*/")
1060 v.cfc.free_var(e)
1061 v.indent
1062 var e2 = v.ensure_var(v.compile_expr(n_else), "Else value")
1063 v.add_assignment(e, e2)
1064 v.unindent
1065 v.add_instr("}")
1066 return e
1067 end
1068 end
1069
1070 class AControlableBlock
1071 special PExpr
1072 meth compile_inside_block(v: CompilerVisitor) is abstract
1073 redef meth compile_stmt(v)
1074 do
1075 var old_break_label = v.nmc.break_label
1076 var old_continue_label = v.nmc.continue_label
1077 var id = v.new_number
1078 v.nmc.break_label = "break_{id}"
1079 v.nmc.continue_label = "continue_{id}"
1080
1081 compile_inside_block(v)
1082
1083
1084 v.nmc.break_label = old_break_label
1085 v.nmc.continue_label = old_continue_label
1086 end
1087 end
1088
1089 redef class AWhileExpr
1090 special AControlableBlock
1091 redef meth compile_inside_block(v)
1092 do
1093 v.add_instr("while (true) \{ /*while*/")
1094 v.indent
1095 var e = v.compile_expr(n_expr)
1096 v.add_instr("if (!UNTAG_Bool({e})) break; /* while*/")
1097 v.cfc.free_var(e)
1098 v.compile_stmt(n_block)
1099 v.add_instr("{v.nmc.continue_label}: while(0);")
1100 v.unindent
1101 v.add_instr("}")
1102 v.add_instr("{v.nmc.break_label}: while(0);")
1103 end
1104 end
1105
1106 redef class AForExpr
1107 special AControlableBlock
1108 redef meth compile_inside_block(v)
1109 do
1110 var e = v.compile_expr(n_expr)
1111 var ittype = meth_iterator.signature.return_type
1112 v.cfc.free_var(e)
1113 var iter = v.cfc.get_var("For iterator")
1114 v.add_assignment(iter, meth_iterator.compile_expr_call(v, [e]))
1115 v.add_instr("while (true) \{ /*for*/")
1116 v.indent
1117 var ok = v.cfc.get_var("For 'is_ok' result")
1118 v.add_assignment(ok, meth_is_ok.compile_expr_call(v, [iter]))
1119 v.add_instr("if (!UNTAG_Bool({ok})) break; /*for*/")
1120 v.cfc.free_var(ok)
1121 var e = meth_item.compile_expr_call(v, [iter])
1122 e = v.ensure_var(e, "For item")
1123 var cname = v.cfc.register_variable(variable)
1124 v.add_assignment(cname, e)
1125 v.compile_stmt(n_block)
1126 v.add_instr("{v.nmc.continue_label}: while(0);")
1127 meth_next.compile_stmt_call(v, [iter])
1128 v.unindent
1129 v.add_instr("}")
1130 v.add_instr("{v.nmc.break_label}: while(0);")
1131 end
1132 end
1133
1134 redef class AAssertExpr
1135 redef meth compile_stmt(v)
1136 do
1137 var e = v.compile_expr(n_expr)
1138 var s = ""
1139 if n_id != null then
1140 s = " '{n_id.text}' "
1141 end
1142 v.add_instr("if (!UNTAG_Bool({e})) \{ fprintf(stderr, \"Assert%s failed\", \"{s}\"); {v.printf_locate_error(self)} nit_exit(1);}")
1143 end
1144 end
1145
1146 redef class AVarExpr
1147 redef meth compile_expr(v)
1148 do
1149 return " {v.cfc.varname(variable)} /*{variable.name}*/"
1150 end
1151 end
1152
1153 redef class AVarAssignExpr
1154 redef meth compile_stmt(v)
1155 do
1156 var e = v.compile_expr(n_value)
1157 v.add_assignment(v.cfc.varname(variable), "{e} /*{variable.name}=*/")
1158 end
1159 end
1160
1161 redef class AVarReassignExpr
1162 redef meth compile_stmt(v)
1163 do
1164 var e1 = v.cfc.varname(variable)
1165 var e2 = v.compile_expr(n_value)
1166 var e3 = assign_method.compile_expr_call(v, [e1, e2])
1167 v.add_assignment(v.cfc.varname(variable), "{e3} /*{variable.name}*/")
1168 end
1169 end
1170
1171 redef class ASelfExpr
1172 redef meth compile_expr(v)
1173 do
1174 return v.cfc.varname(v.nmc.method_params[0])
1175 end
1176 end
1177
1178 redef class AOrExpr
1179 redef meth compile_expr(v)
1180 do
1181 var e = v.ensure_var(v.compile_expr(n_expr), "Left 'or' operand")
1182 v.add_instr("if (!UNTAG_Bool({e})) \{ /* or */")
1183 v.cfc.free_var(e)
1184 v.indent
1185 var e2 = v.compile_expr(n_expr2)
1186 v.add_assignment(e, e2)
1187 v.unindent
1188 v.add_instr("}")
1189 return e
1190 end
1191 end
1192
1193 redef class AAndExpr
1194 redef meth compile_expr(v)
1195 do
1196 var e = v.ensure_var(v.compile_expr(n_expr), "Left 'and' operand")
1197 v.add_instr("if (UNTAG_Bool({e})) \{ /* and */")
1198 v.cfc.free_var(e)
1199 v.indent
1200 var e2 = v.compile_expr(n_expr2)
1201 v.add_assignment(e, e2)
1202 v.unindent
1203 v.add_instr("}")
1204 return e
1205 end
1206 end
1207
1208 redef class ANotExpr
1209 redef meth compile_expr(v)
1210 do
1211 return " TAG_Bool(!UNTAG_Bool({v.compile_expr(n_expr)}))"
1212 end
1213 end
1214
1215 redef class AEeExpr
1216 redef meth compile_expr(v)
1217 do
1218 var e = v.compile_expr(n_expr)
1219 var e2 = v.compile_expr(n_expr2)
1220 return "TAG_Bool(IS_EQUAL_NN({e},{e2}))"
1221 end
1222 end
1223
1224 redef class AIsaExpr
1225 redef meth compile_expr(v)
1226 do
1227 var e = v.compile_expr(n_expr)
1228 return n_type.stype.compile_cast(v, e)
1229 end
1230 end
1231
1232 redef class AAsCastExpr
1233 redef meth compile_expr(v)
1234 do
1235 var e = v.compile_expr(n_expr)
1236 n_type.stype.compile_type_check(v, e, self)
1237 return e
1238 end
1239 end
1240
1241 redef class AAsNotnullExpr
1242 redef meth compile_expr(v)
1243 do
1244 var e = v.compile_expr(n_expr)
1245 n_expr.stype.compile_notnull_check(v, e, self)
1246 return e
1247 end
1248 end
1249
1250 redef class ATrueExpr
1251 redef meth compile_expr(v)
1252 do
1253 return " TAG_Bool(true)"
1254 end
1255 end
1256
1257 redef class AFalseExpr
1258 redef meth compile_expr(v)
1259 do
1260 return " TAG_Bool(false)"
1261 end
1262 end
1263
1264 redef class AIntExpr
1265 redef meth compile_expr(v)
1266 do
1267 return " TAG_Int({n_number.text})"
1268 end
1269 end
1270
1271 redef class AFloatExpr
1272 redef meth compile_expr(v)
1273 do
1274 return "BOX_Float({n_float.text})"
1275 end
1276 end
1277
1278 redef class ACharExpr
1279 redef meth compile_expr(v)
1280 do
1281 return " TAG_Char({n_char.text})"
1282 end
1283 end
1284
1285 redef class AStringFormExpr
1286 redef meth compile_expr(v)
1287 do
1288 compute_string_info
1289 var i = v.new_number
1290 var cvar = v.cfc.get_var("Once String constant")
1291 v.add_decl("static val_t once_value_{i} = NIT_NULL; /* Once value for string {cvar}*/")
1292 v.add_instr("if (once_value_{i} != NIT_NULL) {cvar} = once_value_{i};")
1293 v.add_instr("else \{")
1294 v.indent
1295 v.cfc.free_var(cvar)
1296 var e = meth_with_native.compile_constructor_call(v, stype , ["BOX_NativeString(\"{_cstring}\")", "TAG_Int({_cstring_length})"])
1297 v.add_assignment(cvar, e)
1298 v.add_instr("once_value_{i} = {cvar};")
1299 v.unindent
1300 v.add_instr("}")
1301 return cvar
1302 end
1303
1304 # The raw string value
1305 protected meth string_text: String is abstract
1306
1307 # The string in a C native format
1308 protected attr _cstring: String
1309
1310 # The string length in bytes
1311 protected attr _cstring_length: Int
1312
1313 # Compute _cstring and _cstring_length using string_text
1314 protected meth compute_string_info
1315 do
1316 var len = 0
1317 var str = string_text
1318 var res = new Buffer
1319 var i = 0
1320 while i < str.length do
1321 var c = str[i]
1322 if c == '\\' then
1323 i = i + 1
1324 var c2 = str[i]
1325 if c2 != '{' and c2 != '}' then
1326 res.add(c)
1327 end
1328 c = c2
1329 end
1330 len = len + 1
1331 res.add(c)
1332 i = i + 1
1333 end
1334 _cstring = res.to_s
1335 _cstring_length = len
1336 end
1337 end
1338
1339 redef class AStringExpr
1340 redef meth string_text do return n_string.text.substring(1, n_string.text.length - 2)
1341 end
1342 redef class AStartStringExpr
1343 redef meth string_text do return n_string.text.substring(1, n_string.text.length - 2)
1344 end
1345 redef class AMidStringExpr
1346 redef meth string_text do return n_string.text.substring(1, n_string.text.length - 2)
1347 end
1348 redef class AEndStringExpr
1349 redef meth string_text do return n_string.text.substring(1, n_string.text.length - 2)
1350 end
1351
1352 redef class ASuperstringExpr
1353 redef meth compile_expr(v)
1354 do
1355 var array = meth_with_capacity.compile_constructor_call(v, atype, ["TAG_Int({n_exprs.length})"])
1356 array = v.ensure_var(array, "Array (for super-string)")
1357
1358 for ne in n_exprs do
1359 var e = v.ensure_var(v.compile_expr(ne), "super-string element")
1360 if ne.stype != stype then
1361 v.cfc.free_var(e)
1362 e = meth_to_s.compile_expr_call(v, [e])
1363 end
1364 v.cfc.free_var(e)
1365 meth_add.compile_stmt_call(v, [array, e])
1366 end
1367
1368 return meth_to_s.compile_expr_call(v, [array])
1369 end
1370 end
1371
1372 redef class ANullExpr
1373 redef meth compile_expr(v)
1374 do
1375 return " NIT_NULL /*null*/"
1376 end
1377 end
1378
1379 redef class AArrayExpr
1380 redef meth compile_expr(v)
1381 do
1382 var recv = meth_with_capacity.compile_constructor_call(v, stype, ["TAG_Int({n_exprs.length})"])
1383 recv = v.ensure_var(recv, "Literal array")
1384
1385 for ne in n_exprs do
1386 var e = v.compile_expr(ne)
1387 meth_add.compile_stmt_call(v, [recv, e])
1388 end
1389 return recv
1390 end
1391 end
1392
1393 redef class ARangeExpr
1394 redef meth compile_expr(v)
1395 do
1396 var e = v.compile_expr(n_expr)
1397 var e2 = v.compile_expr(n_expr2)
1398 return meth_init.compile_constructor_call(v, stype, [e, e2])
1399 end
1400 end
1401
1402 redef class ASuperExpr
1403 redef meth compile_stmt(v)
1404 do
1405 var e = intern_compile_call(v)
1406 if e != null then
1407 v.add_instr(e + ";")
1408 end
1409 end
1410
1411 redef meth compile_expr(v)
1412 do
1413 var e = intern_compile_call(v)
1414 assert e != null
1415 return e
1416 end
1417
1418 private meth intern_compile_call(v: CompilerVisitor): String
1419 do
1420 var arity = v.nmc.method_params.length - 1
1421 if init_in_superclass != null then
1422 arity = init_in_superclass.signature.arity
1423 end
1424 var args = new Array[String].with_capacity(arity + 1)
1425 args.add(v.cfc.varname(v.nmc.method_params[0]))
1426 if n_args.length != arity then
1427 for i in [0..arity[ do
1428 args.add(v.cfc.varname(v.nmc.method_params[i + 1]))
1429 end
1430 else
1431 for na in n_args do
1432 args.add(v.compile_expr(na))
1433 end
1434 end
1435 #return "{prop.cname}({args.join(", ")}) /*super {prop.local_class}::{prop.name}*/"
1436 if init_in_superclass != null then
1437 return init_in_superclass.intern_compile_call(v, args)
1438 else
1439 if prop.global.is_init then args.add("init_table")
1440 return prop.compile_super_call(v, args)
1441 end
1442 end
1443 end
1444
1445 redef class AAttrExpr
1446 redef meth compile_expr(v)
1447 do
1448 var e = v.compile_expr(n_expr)
1449 return prop.compile_access(v, e)
1450 end
1451 end
1452
1453 redef class AAttrAssignExpr
1454 redef meth compile_stmt(v)
1455 do
1456 var e = v.compile_expr(n_expr)
1457 var e2 = v.compile_expr(n_value)
1458 v.add_assignment(prop.compile_access(v, e), e2)
1459 end
1460 end
1461 redef class AAttrReassignExpr
1462 redef meth compile_stmt(v)
1463 do
1464 var e1 = v.compile_expr(n_expr)
1465 var e2 = prop.compile_access(v, e1)
1466 var e3 = v.compile_expr(n_value)
1467 var e4 = assign_method.compile_expr_call(v, [e2, e3])
1468 v.add_assignment(e2, e4)
1469 end
1470 end
1471
1472 redef class AAbsAbsSendExpr
1473 # Compile each argument and add them to the array
1474 meth compile_arguments_in(v: CompilerVisitor, cargs: Array[String])
1475 do
1476 for a in arguments do
1477 cargs.add(v.compile_expr(a))
1478 end
1479 end
1480
1481 end
1482
1483 redef class ASendExpr
1484 private meth intern_compile_call(v: CompilerVisitor): String
1485 do
1486 var recv = v.compile_expr(n_expr)
1487 var cargs = new Array[String]
1488 cargs.add(recv)
1489 compile_arguments_in(v, cargs)
1490
1491 var e: String
1492 if prop_signature.closures.is_empty then
1493 e = prop.intern_compile_call(v, cargs)
1494 else
1495 e = prop.compile_call_and_closures(v, cargs, closure_defs)
1496 end
1497
1498 if prop.global.is_init then
1499 v.invoke_super_init_calls_after(prop)
1500 end
1501 return e
1502 end
1503
1504 redef meth compile_expr(v)
1505 do
1506 var e = intern_compile_call(v)
1507 assert e != null
1508 return e
1509 end
1510
1511 redef meth compile_stmt(v)
1512 do
1513 var e = intern_compile_call(v)
1514 if e != null then
1515 v.add_instr(e + ";")
1516 end
1517 end
1518 end
1519
1520 redef class ASendReassignExpr
1521 redef meth compile_expr(v) do abort
1522
1523 redef meth compile_stmt(v)
1524 do
1525 var recv = v.compile_expr(n_expr)
1526 var cargs = new Array[String]
1527 cargs.add(recv)
1528 compile_arguments_in(v, cargs)
1529
1530 var e2 = read_prop.compile_expr_call(v, cargs)
1531 var e3 = v.compile_expr(n_value)
1532 var e4 = assign_method.compile_expr_call(v, [e2, e3])
1533 cargs.add(e4)
1534 prop.compile_stmt_call(v, cargs)
1535 end
1536 end
1537
1538 redef class ANewExpr
1539 redef meth compile_expr(v)
1540 do
1541 var cargs = new Array[String]
1542 compile_arguments_in(v, cargs)
1543 return prop.compile_constructor_call(v, stype, cargs)
1544 end
1545
1546 redef meth compile_stmt(v) do abort
1547 end
1548
1549 redef class PClosureDef
1550 # Compile the closure definition as a function in v.out_contexts
1551 # Return the cname of the function
1552 meth compile_closure(v: CompilerVisitor, closcn: String): String is abstract
1553
1554 # Compile the closure definition inside the current C function.
1555 meth do_compile_inside(v: CompilerVisitor, params: Array[String]): String is abstract
1556 end
1557
1558 redef class AClosureDef
1559 # The cname of the function
1560 readable attr _cname: String
1561
1562 redef meth compile_closure(v, closcn)
1563 do
1564 var ctx_old = v.ctx
1565 v.ctx = new CContext
1566 v.out_contexts.add(v.ctx)
1567
1568 var cfc_old = v.cfc.closure
1569 v.cfc.closure = v.nmc
1570
1571 var old_rv = v.nmc.return_value
1572 var old_bv = v.nmc.break_value
1573 if cfc_old == null then
1574 v.nmc.return_value = "closctx->{old_rv}"
1575 v.nmc.break_value = "closctx->{old_bv}"
1576 end
1577
1578 var cname = "OC_{v.nmc.method.cname}_{v.out_contexts.length}"
1579 _cname = cname
1580 var args = new Array[String]
1581 for i in [0..closure.signature.arity[ do
1582 args.add(" param{i}")
1583 end
1584
1585 var cs = decl_csignature(v, args, closcn)
1586
1587 v.add_instr("{cs} \{")
1588 v.indent
1589 var ctx_old2 = v.ctx
1590 v.ctx = new CContext
1591
1592 v.add_decl("struct trace_t trace = \{NULL, NULL, {line_number}, LOCATE_{v.nmc.method.cname}};")
1593 v.add_instr("trace.prev = tracehead; tracehead = &trace;")
1594
1595 v.add_instr("trace.file = LOCATE_{v.module.name};")
1596 var s = do_compile_inside(v, args)
1597
1598 v.add_instr("{v.nmc.return_label}:")
1599 v.add_instr("tracehead = trace.prev;")
1600 if s == null then
1601 v.add_instr("return;")
1602 else
1603 v.add_instr("return {s};")
1604 end
1605
1606 ctx_old2.append(v.ctx)
1607 v.ctx = ctx_old2
1608 v.unindent
1609 v.add_instr("}")
1610 v.ctx = ctx_old
1611
1612 v.cfc.closure = cfc_old
1613 v.nmc.return_value = old_rv
1614 v.nmc.break_value = old_bv
1615
1616 # Build closure
1617 var closcnv = "wbclos{v.new_number}"
1618 v.add_decl("struct WBT_ {closcnv};")
1619 v.add_instr("{closcnv}.fun = (fun_t){cname};")
1620 v.add_instr("{closcnv}.has_broke = NULL;")
1621 if cfc_old != null then
1622 v.add_instr("{closcnv}.variable = closctx->variable;")
1623 v.add_instr("{closcnv}.closurevariable = closctx->closurevariable;")
1624 else
1625 v.add_instr("{closcnv}.variable = variable;")
1626 v.add_instr("{closcnv}.closurevariable = closurevariable;")
1627 end
1628
1629 return "(&{closcnv})"
1630 end
1631
1632 protected meth decl_csignature(v: CompilerVisitor, args: Array[String], closcn: String): String
1633 do
1634 var params = new Array[String]
1635 params.add("struct WBT_ *closctx")
1636 for i in [0..closure.signature.arity[ do
1637 var p = "val_t {args[i]}"
1638 params.add(p)
1639 end
1640 var ret: String
1641 if closure.signature.return_type != null then
1642 ret = "val_t"
1643 else
1644 ret = "void"
1645 end
1646 var p = params.join(", ")
1647 var s = "{ret} {cname}({p})"
1648 v.add_decl("typedef {ret} (* {cname}_t)({p});")
1649 v.add_decl(s + ";")
1650 return s
1651 end
1652
1653 redef meth do_compile_inside(v, params)
1654 do
1655 for i in [0..variables.length[ do
1656 var vacname = v.cfc.register_variable(variables[i])
1657 v.add_assignment(vacname, params[i])
1658 end
1659
1660 var old_cv = v.nmc.continue_value
1661 var old_cl = v.nmc.continue_label
1662 var old_bl = v.nmc.break_label
1663
1664 v.nmc.continue_value = v.cfc.get_var("Continue value and escape marker")
1665 v.nmc.continue_label = "continue_label{v.new_number}"
1666 v.nmc.break_label = v.nmc.return_label
1667
1668 v.compile_stmt(n_expr)
1669
1670 v.add_instr("{v.nmc.continue_label}: while(false);")
1671
1672 var ret: String = null
1673 if closure.signature.return_type != null then ret = v.nmc.continue_value
1674
1675 v.nmc.continue_value = old_cv
1676 v.nmc.continue_label = old_cl
1677 v.nmc.break_label = old_bl
1678
1679 return ret
1680 end
1681 end
1682
1683 redef class PClosureDecl
1684 meth do_compile_inside(v: CompilerVisitor, params: Array[String]): String is abstract
1685 end
1686 redef class AClosureDecl
1687 redef meth do_compile_inside(v, params)
1688 do
1689 if n_signature != null then n_signature.compile_parameters(v, variable.closure.signature, params)
1690
1691 var old_cv = v.nmc.continue_value
1692 var old_cl = v.nmc.continue_label
1693 var old_bl = v.nmc.break_label
1694
1695 v.nmc.continue_value = v.cfc.get_var("Continue value and escape marker")
1696 v.nmc.continue_label = "continue_label{v.new_number}"
1697 v.nmc.break_label = v.nmc.return_label
1698
1699 v.compile_stmt(n_expr)
1700
1701 v.add_instr("{v.nmc.continue_label}: while(false);")
1702
1703 var ret: String = null
1704 if variable.closure.signature.return_type != null then ret = v.nmc.continue_value
1705
1706 v.nmc.continue_value = old_cv
1707 v.nmc.continue_label = old_cl
1708 v.nmc.break_label = old_bl
1709
1710 return ret
1711 end
1712 end
1713
1714 redef class AClosureCallExpr
1715 meth intern_compile_call(v: CompilerVisitor): String
1716 do
1717 var cargs = new Array[String]
1718 compile_arguments_in(v, cargs)
1719 var va: String = null
1720 if variable.closure.signature.return_type != null then va = v.cfc.get_var("Closure call result value")
1721
1722 if variable.closure.is_optional then
1723 v.add_instr("if({v.cfc.varname(variable)}==NULL) \{")
1724 v.indent
1725 var n = variable.decl
1726 assert n isa AClosureDecl
1727 var s = n.do_compile_inside(v, cargs)
1728 if s != null then v.add_assignment(va, s)
1729 v.unindent
1730 v.add_instr("} else \{")
1731 v.indent
1732 end
1733
1734 var ivar = v.cfc.varname(variable)
1735 var cargs2 = [ivar]
1736 cargs2.append(cargs)
1737 var s = "(({variable.ctypename})({ivar}->fun))({cargs2.join(", ")}) /* Invoke closure {variable} */"
1738 if va != null then
1739 v.add_assignment(va, s)
1740 else
1741 v.add_instr("{s};")
1742 end
1743 v.add_instr("if ({ivar}->has_broke) \{")
1744 v.indent
1745 if n_closure_defs != null and n_closure_defs.length == 1 then do
1746 n_closure_defs.first.do_compile_inside(v, null)
1747 end
1748 if v.cfc.closure == v.nmc then v.add_instr("if ({ivar}->has_broke) \{ closctx->has_broke = {ivar}->has_broke; closctx->broke_value = {ivar}->broke_value;\}")
1749 v.add_instr("goto {v.nmc.return_label};")
1750 v.unindent
1751 v.add_instr("\}")
1752
1753 if variable.closure.is_optional then
1754 v.unindent
1755 v.add_instr("\}")
1756 end
1757 return va
1758 end
1759
1760 redef meth compile_expr(v)
1761 do
1762 var e = intern_compile_call(v)
1763 assert e != null
1764 return e
1765 end
1766
1767 redef meth compile_stmt(v)
1768 do
1769 var e = intern_compile_call(v)
1770 if e != null then
1771 v.add_instr(e + ";")
1772 end
1773 end
1774 end
1775
1776 redef class AProxyExpr
1777 redef meth compile_expr(v)
1778 do
1779 return v.compile_expr(n_expr)
1780 end
1781 end
1782
1783 redef class AOnceExpr
1784 redef meth compile_expr(v)
1785 do
1786 var i = v.new_number
1787 var cvar = v.cfc.get_var("Once expression result")
1788 v.add_decl("static val_t once_value_{i}; static int once_bool_{i}; /* Once value for {cvar}*/")
1789 v.add_instr("if (once_bool_{i}) {cvar} = once_value_{i};")
1790 v.add_instr("else \{")
1791 v.indent
1792 v.cfc.free_var(cvar)
1793 var e = v.compile_expr(n_expr)
1794 v.add_assignment(cvar, e)
1795 v.add_instr("once_value_{i} = {cvar};")
1796 v.add_instr("once_bool_{i} = true;")
1797 v.unindent
1798 v.add_instr("}")
1799 return cvar
1800 end
1801 end
Nit language project; an oo programing language and its tool suite.