1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 Jean Privat <jean@pryen.org>
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
17 # Interpretation of a Nit program directly on the AST
18 module naive_interpreter
22 import auto_super_init
25 redef class ToolContext
26 # --discover-call-trace
27 var opt_discover_call_trace
: OptionBool = new OptionBool("Trace calls of the first invocation of a method", "--discover-call-trace")
32 self.option_context
.add_option
(self.opt_discover_call_trace
)
36 redef class ModelBuilder
37 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
38 # `arguments` are the command-line arguments in order
40 # 1. the AST is fully loaded.
41 # 2. the model is fully built.
42 # 3. the instructions are fully analysed.
43 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
46 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
48 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
49 init_naive_interpreter
(interpreter
, mainmodule
)
52 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
55 private fun init_naive_interpreter
(interpreter
: NaiveInterpreter, mainmodule
: MModule) do
56 var sys_type
= mainmodule
.sys_type
57 if sys_type
== null then return # no class Sys
58 var mainobj
= new MutableInstance(sys_type
)
59 interpreter
.mainobj
= mainobj
60 interpreter
.init_instance
(mainobj
)
61 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
62 if initprop
!= null then
63 interpreter
.send
(initprop
, [mainobj
])
65 interpreter
.check_init_instance
(mainobj
)
66 var mainprop
= mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
67 if mainprop
!= null then
68 interpreter
.send
(mainprop
, [mainobj
])
73 # The visitor that interprets the Nit Program by walking on the AST
74 private class NaiveInterpreter
75 # The modelbuilder that know the AST and its associations with the model
76 var modelbuilder
: ModelBuilder
78 # The main moduleof the program (used to lookup methoda
79 var mainmodule
: MModule
81 # The command line arguments of the interpreted program
82 # arguments.first is the program name
83 # arguments[1] is the first argument
84 var arguments
: Array[String]
86 var mainobj
: nullable Instance
88 init(modelbuilder
: ModelBuilder, mainmodule
: MModule, arguments
: Array[String])
90 self.modelbuilder
= modelbuilder
91 self.mainmodule
= mainmodule
92 self.arguments
= arguments
93 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
94 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
95 self.null_instance
= new MutableInstance(mainmodule
.model
.null_type
)
98 # Subtype test in the context of the mainmodule
99 fun is_subtype
(sub
, sup
: MType): Bool
101 return sub
.is_subtype
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType), sup
)
104 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
106 assert recv
isa MClassType
107 return self.modelbuilder
.force_get_primitive_method
(self.frame
.current_node
, name
, recv
.mclass
, self.mainmodule
)
110 # Is a return executed?
111 # Set this mark to skip the evaluation until the end of the specified method frame
112 var returnmark
: nullable Frame = null
114 # Is a break executed?
115 # Set this mark to skip the evaluation until a labeled statement catch it with `is_break`
116 var breakmark
: nullable EscapeMark = null
118 # Is a continue executed?
119 # Set this mark to skip the evaluation until a labeled statement catch it with `is_continue`
120 var continuemark
: nullable EscapeMark = null
122 # Is a return or a break or a continue executed?
123 # Use this function to know if you must skip the evaluation of statements
124 fun is_escaping
: Bool do return returnmark
!= null or breakmark
!= null or continuemark
!= null
126 # The value associated with the current return/break/continue, if any.
127 # Set the value when you set a escapemark.
128 # Read the value when you catch a mark or reach the end of a method
129 var escapevalue
: nullable Instance = null
131 # If there is a break and is associated with `escapemark`, then return true an clear the mark.
132 # If there is no break or if `escapemark` is null then return false.
133 # Use this function to catch a potential break.
134 fun is_break
(escapemark
: nullable EscapeMark): Bool
136 if escapemark
!= null and self.breakmark
== escapemark
then
137 self.breakmark
= null
144 # If there is a continue and is associated with `escapemark`, then return true an clear the mark.
145 # If there is no continue or if `escapemark` is null then return false.
146 # Use this function to catch a potential continue.
147 fun is_continue
(escapemark
: nullable EscapeMark): Bool
149 if escapemark
!= null and self.continuemark
== escapemark
then
150 self.continuemark
= null
157 # Evaluate `n` as an expression in the current context.
158 # Return the value of the expression.
159 # If `n` cannot be evaluated, then aborts.
160 fun expr
(n
: AExpr): nullable Instance
162 var frame
= self.frame
163 var old
= frame
.current_node
164 frame
.current_node
= n
165 #n.debug("IN Execute expr")
167 if i
== null and not self.is_escaping
then
168 n
.debug
("inconsitance: no value and not escaping.")
170 var implicit_cast_to
= n
.implicit_cast_to
171 if implicit_cast_to
!= null then
172 var mtype
= self.unanchor_type
(implicit_cast_to
)
173 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed")
176 #n.debug("OUT Execute expr: value is {i}")
177 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
178 frame
.current_node
= old
182 # Evaluate `n` as a statement in the current context.
183 # Do nothing if `n` is null.
184 # If `n` cannot be evaluated, then aborts.
185 fun stmt
(n
: nullable AExpr)
188 var frame
= self.frame
189 var old
= frame
.current_node
190 frame
.current_node
= n
191 #n.debug("Execute stmt")
193 frame
.current_node
= old
197 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
198 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
200 # Return the boolean instance associated with `val`.
201 fun bool_instance
(val
: Bool): Instance
203 if val
then return self.true_instance
else return self.false_instance
206 # Return the integer instance associated with `val`.
207 fun int_instance
(val
: Int): Instance
209 var ic
= self.mainmodule
.get_primitive_class
("Int")
210 return new PrimitiveInstance[Int](ic
.mclass_type
, val
)
213 # Return the char instance associated with `val`.
214 fun char_instance
(val
: Char): Instance
216 var ic
= self.mainmodule
.get_primitive_class
("Char")
217 return new PrimitiveInstance[Char](ic
.mclass_type
, val
)
220 # Return the float instance associated with `val`.
221 fun float_instance
(val
: Float): Instance
223 var ic
= self.mainmodule
.get_primitive_class
("Float")
224 return new PrimitiveInstance[Float](ic
.mclass_type
, val
)
227 # The unique intance of the `true` value.
228 var true_instance
: Instance
230 # The unique intance of the `false` value.
231 var false_instance
: Instance
233 # The unique intance of the `null` value.
234 var null_instance
: Instance
236 # Return a new array made of `values`.
237 # The dynamic type of the result is Array[elttype].
238 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
240 assert not elttype
.need_anchor
241 var nat
= new PrimitiveInstance[Array[Instance]](self.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([elttype
]), values
)
242 var mtype
= self.mainmodule
.get_primitive_class
("Array").get_mtype
([elttype
])
243 var res
= new MutableInstance(mtype
)
244 self.init_instance
(res
)
245 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
246 self.check_init_instance
(res
)
250 # Return a new native string initialized with `txt`
251 fun native_string_instance
(txt
: String): Instance
253 var val
= new Buffer.from
(txt
)
255 var ic
= self.mainmodule
.get_primitive_class
("NativeString")
256 return new PrimitiveInstance[Buffer](ic
.mclass_type
, val
)
259 # The current frame used to store local variables of the current method executed
260 fun frame
: Frame do return frames
.first
262 # The stack of all frames. The first one is the current one.
263 var frames
: List[Frame] = new List[Frame]
265 # Return a stack stace. One line per function
266 fun stack_trace
: String
269 b
.append
(",---- Stack trace -- - - -\n")
271 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
273 b
.append
("`------------------- - - -")
277 # Exit the program with a message
278 fun fatal
(message
: String)
280 if frames
.is_empty
then
283 self.frame
.current_node
.fatal
(self, message
)
288 # Debug on the current node
289 fun debug
(message
: String)
291 if frames
.is_empty
then
294 self.frame
.current_node
.debug
(message
)
298 # Store known method, used to trace methods as thez are reached
299 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
301 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
302 # Return a falue if `mpropdef` is a function, or null if it is a procedure.
303 # The call is direct/static. There is no message-seding/late-bindng.
304 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
306 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
307 self.discover_call_trace
.add mpropdef
308 self.debug
("Discovered {mpropdef}")
310 var vararg_rank
= mpropdef
.msignature
.vararg_rank
311 if vararg_rank
>= 0 then
312 assert args
.length
>= mpropdef
.msignature
.arity
+ 1 # because of self
314 args
= new Array[Instance]
316 args
.add
(rawargs
.first
) # recv
318 for i
in [0..vararg_rank
[ do
319 args
.add
(rawargs
[i
+1])
322 var vararg_lastrank
= vararg_rank
+ rawargs
.length-1-mpropdef
.msignature
.arity
323 var vararg
= new Array[Instance]
324 for i
in [vararg_rank
..vararg_lastrank
] do
325 vararg
.add
(rawargs
[i
+1])
327 # FIXME: its it to late to determine the vararg type, this should have been done during a previous analysis
328 var elttype
= mpropdef
.msignature
.mparameters
[vararg_rank
].mtype
.anchor_to
(self.mainmodule
, args
.first
.mtype
.as(MClassType))
329 args
.add
(self.array_instance
(vararg
, elttype
))
331 for i
in [vararg_lastrank
+1..rawargs
.length-1
[ do
332 args
.add
(rawargs
[i
+1])
335 if args
.length
< mpropdef
.msignature
.arity
+ 1 or args
.length
> mpropdef
.msignature
.arity
+ 1 + mpropdef
.msignature
.mclosures
.length
then
336 fatal
("NOT YET IMPLEMENTED: Invalid arity for {mpropdef}. {args.length} arguments given.")
338 if args
.length
< mpropdef
.msignature
.arity
+ 1 + mpropdef
.msignature
.mclosures
.length
then
339 fatal
("NOT YET IMPLEMENTED: default closures")
342 # Look for the AST node that implements the property
343 var mproperty
= mpropdef
.mproperty
344 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
345 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
346 self.parameter_check
(npropdef
, mpropdef
, args
)
347 return npropdef
.call
(self, mpropdef
, args
)
348 else if mproperty
.name
== "init" then
349 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
350 self.parameter_check
(nclassdef
, mpropdef
, args
)
351 return nclassdef
.call
(self, mpropdef
, args
)
353 fatal
("Fatal Error: method {mpropdef} not found in the AST")
358 # Generate type checks in the C code to check covariant parameters
359 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
361 var msignature
= mpropdef
.msignature
362 for i
in [0..msignature
.arity
[ do
363 # skip test for vararg since the array is instantiated with the correct polymorphic type
364 if msignature
.vararg_rank
== i
then continue
366 # skip if the cast is not required
367 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
368 if not origmtype
.need_anchor
then continue
370 # get the parameter type
371 var mtype
= msignature
.mparameters
[i
].mtype
372 var anchor
= args
.first
.mtype
.as(MClassType)
373 mtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
374 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, mtype
) then
375 node
.fatal
(self, "Cast failed")
380 fun call_closure
(closure
: ClosureInstance, args
: Array[Instance]): nullable Instance
382 var nclosuredef
= closure
.nclosuredef
383 var f
= closure
.frame
384 for i
in [0..closure
.nclosuredef
.mclosure
.mtype
.as(MSignature).arity
[ do
385 var variable
= nclosuredef
.variables
[i
]
386 f
.map
[variable
] = args
[i
]
389 self.frames
.unshift
(f
)
391 self.stmt
(nclosuredef
.n_expr
)
395 if self.is_continue
(nclosuredef
.escapemark
) then
396 var res
= self.escapevalue
397 self.escapevalue
= null
403 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
404 # Return a falue if `mproperty` is a function, or null if it is a procedure.
405 # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
406 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
408 var recv
= args
.first
409 var mtype
= recv
.mtype
410 if mtype
isa MNullType then
411 if mproperty
.name
== "==" then
412 return self.bool_instance
(args
[0] == args
[1])
413 else if mproperty
.name
== "!=" then
414 return self.bool_instance
(args
[0] != args
[1])
416 #fatal("Reciever is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
417 fatal
("Reciever is null")
420 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
421 return self.call
(propdef
, args
)
424 # Read the attribute `mproperty` of an instance `recv` and return its value.
425 # If the attribute in not yet initialized, then aborts with an error message.
426 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
428 assert recv
isa MutableInstance
429 if not recv
.attributes
.has_key
(mproperty
) then
430 fatal
("Uninitialized attribute {mproperty.name}")
433 return recv
.attributes
[mproperty
]
436 # Collect attributes of a type in the order of their init
437 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
439 var cache
= self.collect_attr_propdef_cache
440 if cache
.has_key
(mtype
) then return cache
[mtype
]
442 var res
= new Array[AAttrPropdef]
443 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
444 self.mainmodule
.linearize_mclassdefs
(cds
)
446 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
447 for npropdef
in n
.n_propdefs
do
448 if npropdef
isa AAttrPropdef then
458 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
460 # Fill the initial values of the newly created instance `recv`.
461 # `recv.mtype` is used to know what must be filled.
462 fun init_instance
(recv
: Instance)
464 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
465 npropdef
.init_expr
(self, recv
)
469 # Check that non nullable attributes of `recv` are correctly initialized.
470 # This function is used as the last instruction of a new
471 fun check_init_instance
(recv
: Instance)
473 if not recv
isa MutableInstance then return
474 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
475 if npropdef
.n_expr
== null then
476 # Force read to check the initialization
477 self.read_attribute
(npropdef
.mpropdef
.mproperty
, recv
)
482 # This function determine the correct type according the reciever of the current definition (self).
483 fun unanchor_type
(mtype
: MType): MType
485 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
489 # An instance represents a value of the executed program.
490 abstract class Instance
491 # The dynamic type of the instance
492 # ASSERT: not self.mtype.is_anchored
495 # return true if the instance is the true value.
496 # return false if the instance is the true value.
498 fun is_true
: Bool do abort
500 # Return true if `self` IS `o` (using the Nit semantic of is)
501 fun eq_is
(o
: Instance): Bool do return self is o
503 # Human readable object identity "Type#number"
504 redef fun to_s
do return "{mtype}"
506 # Return the integer value if the instance is an integer.
508 fun to_i
: Int do abort
510 # Return the integer value if the instance is a float.
512 fun to_f
: Float do abort
514 # The real value encapsulated if the instance is primitive.
516 fun val
: Object do abort
519 # A instance with attribute (standards objects)
520 class MutableInstance
523 # The values of the attributes
524 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
527 # Special instance to handle primitives values (int, bool, etc.)
528 # The trick it just to encapsulate the <<real>> value
529 class PrimitiveInstance[E
: Object]
532 # The real value encapsulated
535 init(mtype
: MType, val
: E
)
543 if val
== true then return true
544 if val
== false then return false
550 if not o
isa PrimitiveInstance[Object] then return false
551 return self.val
== o
.val
556 if not o
isa PrimitiveInstance[Object] then return false
557 return self.val
is o
.val
560 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
562 redef fun to_i
do return val
.as(Int)
564 redef fun to_f
do return val
.as(Float)
567 private class ClosureInstance
572 var nclosuredef
: AClosureDef
574 init(mtype
: MType, frame
: Frame, nclosuredef
: AClosureDef)
578 self.nclosuredef
= nclosuredef
582 # Information about local variables in a running method
584 # The current visited node
585 # The node is stored by frame to keep a stack trace
586 var current_node
: ANode
587 # The executed property.
588 # A Method in case of a call, an attribute in case of a default initialization.
589 var mpropdef
: MPropDef
590 # Arguments of the method (the first is te receiver
591 var arguments
: Array[Instance]
592 # Mapping betwen a variable an the current value
593 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
597 # Aborts the program with a message
598 # `v` is used to know if a colored message is displayed or not
599 private fun fatal
(v
: NaiveInterpreter, message
: String)
601 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
602 stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
604 stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
605 stderr
.write
(v
.stack_trace
)
613 # Execute a `mpropdef` associated with the current node.
614 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
616 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
621 redef class AConcreteMethPropdef
622 redef fun call
(v
, mpropdef
, args
)
624 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
625 for i
in [0..mpropdef
.msignature
.arity
[ do
626 var variable
= self.n_signature
.n_params
[i
].variable
627 assert variable
!= null
628 f
.map
[variable
] = args
[i
+1]
630 for i
in [0..mpropdef
.msignature
.mclosures
.length
[ do
631 var c
= mpropdef
.msignature
.mclosures
[i
]
632 var variable
= self.n_signature
.n_closure_decls
[i
].variable
633 assert variable
!= null
634 f
.map
[variable
] = args
[i
+ 1 + mpropdef
.msignature
.arity
]
639 # Call the implicit super-init
640 var auto_super_inits
= self.auto_super_inits
641 if auto_super_inits
!= null then
642 var selfarg
= [args
.first
]
643 for auto_super_init
in auto_super_inits
do
644 if auto_super_init
.intro
.msignature
.arity
== 0 then
645 v
.send
(auto_super_init
, selfarg
)
647 v
.send
(auto_super_init
, args
)
654 if v
.returnmark
== f
then
656 var res
= v
.escapevalue
664 redef class AInternMethPropdef
665 redef fun call
(v
, mpropdef
, args
)
667 var pname
= mpropdef
.mproperty
.name
668 var cname
= mpropdef
.mclassdef
.mclass
.name
669 if pname
== "output" then
670 var recv
= args
.first
673 else if pname
== "object_id" then
674 var recv
= args
.first
675 if recv
isa PrimitiveInstance[Object] then
676 return v
.int_instance
(recv
.val
.object_id
)
678 return v
.int_instance
(recv
.object_id
)
680 else if pname
== "output_class_name" then
681 var recv
= args
.first
684 else if pname
== "native_class_name" then
685 var recv
= args
.first
686 var txt
= recv
.mtype
.to_s
687 return v
.native_string_instance
(txt
)
688 else if pname
== "==" then
689 # == is correclt redefined for instances
690 return v
.bool_instance
(args
[0] == args
[1])
691 else if pname
== "!=" then
692 return v
.bool_instance
(args
[0] != args
[1])
693 else if pname
== "is_same_type" then
694 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
695 else if pname
== "exit" then
698 else if pname
== "sys" then
700 else if cname
== "Int" then
701 if pname
== "unary -" then
702 return v
.int_instance
(-args
[0].to_i
)
703 else if pname
== "succ" then
704 return v
.int_instance
(args
[0].to_i
+ 1)
705 else if pname
== "prec" then
706 return v
.int_instance
(args
[0].to_i
- 1)
707 else if pname
== "+" then
708 return v
.int_instance
(args
[0].to_i
+ args
[1].to_i
)
709 else if pname
== "-" then
710 return v
.int_instance
(args
[0].to_i
- args
[1].to_i
)
711 else if pname
== "*" then
712 return v
.int_instance
(args
[0].to_i
* args
[1].to_i
)
713 else if pname
== "%" then
714 return v
.int_instance
(args
[0].to_i
% args
[1].to_i
)
715 else if pname
== "/" then
716 return v
.int_instance
(args
[0].to_i
/ args
[1].to_i
)
717 else if pname
== "<" then
718 return v
.bool_instance
(args
[0].to_i
< args
[1].to_i
)
719 else if pname
== ">" then
720 return v
.bool_instance
(args
[0].to_i
> args
[1].to_i
)
721 else if pname
== "<=" then
722 return v
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
723 else if pname
== ">=" then
724 return v
.bool_instance
(args
[0].to_i
>= args
[1].to_i
)
725 else if pname
== "<=>" then
726 return v
.int_instance
(args
[0].to_i
<=> args
[1].to_i
)
727 else if pname
== "ascii" then
728 return v
.char_instance
(args
[0].to_i
.ascii
)
729 else if pname
== "to_f" then
730 return v
.float_instance
(args
[0].to_i
.to_f
)
731 else if pname
== "lshift" then
732 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
733 else if pname
== "rshift" then
734 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
736 else if cname
== "Char" then
737 var recv
= args
[0].val
.as(Char)
738 if pname
== "ascii" then
739 return v
.int_instance
(recv
.ascii
)
740 else if pname
== "succ" then
741 return v
.char_instance
(recv
.succ
)
742 else if pname
== "prec" then
743 return v
.char_instance
(recv
.prec
)
744 else if pname
== "<" then
745 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
746 else if pname
== ">" then
747 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
748 else if pname
== "<=" then
749 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
750 else if pname
== ">=" then
751 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
752 else if pname
== "<=>" then
753 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
755 else if cname
== "Float" then
756 var recv
= args
[0].to_f
757 if pname
== "unary -" then
758 return v
.float_instance
(-recv
)
759 else if pname
== "+" then
760 return v
.float_instance
(recv
+ args
[1].to_f
)
761 else if pname
== "-" then
762 return v
.float_instance
(recv
- args
[1].to_f
)
763 else if pname
== "*" then
764 return v
.float_instance
(recv
* args
[1].to_f
)
765 else if pname
== "/" then
766 return v
.float_instance
(recv
/ args
[1].to_f
)
767 else if pname
== "<" then
768 return v
.bool_instance
(recv
< args
[1].to_f
)
769 else if pname
== ">" then
770 return v
.bool_instance
(recv
> args
[1].to_f
)
771 else if pname
== "<=" then
772 return v
.bool_instance
(recv
<= args
[1].to_f
)
773 else if pname
== ">=" then
774 return v
.bool_instance
(recv
>= args
[1].to_f
)
775 else if pname
== "to_i" then
776 return v
.int_instance
(recv
.to_i
)
778 else if cname
== "NativeString" then
779 var recvval
= args
.first
.val
.as(Buffer)
780 if pname
== "[]" then
781 var arg1
= args
[1].to_i
782 if arg1
>= recvval
.length
or arg1
< 0 then
783 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
785 return v
.char_instance
(recvval
[arg1
])
786 else if pname
== "[]=" then
787 var arg1
= args
[1].to_i
788 if arg1
>= recvval
.length
or arg1
< 0 then
789 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
791 recvval
[arg1
] = args
[2].val
.as(Char)
793 else if pname
== "copy_to" then
794 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
795 var destval
= args
[1].val
.as(Buffer)
796 var lenval
= args
[2].to_i
797 var fromval
= args
[3].to_i
798 var toval
= args
[4].to_i
800 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
802 if fromval
+ lenval
>= recvval
.length
then
803 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
806 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
808 if toval
+ lenval
>= destval
.length
then
809 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
811 recvval
.copy
(fromval
, lenval
, destval
, toval
)
813 else if pname
== "atoi" then
814 return v
.int_instance
(recvval
.to_i
)
816 else if pname
== "calloc_string" then
817 return v
.native_string_instance
("!" * args
[1].to_i
)
818 else if cname
== "NativeArray" then
819 var recvval
= args
.first
.val
.as(Array[Instance])
820 if pname
== "[]" then
821 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
822 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
824 return recvval
[args
[1].to_i
]
825 else if pname
== "[]=" then
826 recvval
[args
[1].to_i
] = args
[2]
828 else if pname
== "copy_to" then
829 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
832 else if pname
== "calloc_array" then
833 var recvtype
= args
.first
.mtype
.as(MClassType)
835 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
836 mtype
= mtype
.arguments
.first
837 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
838 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
839 else if pname
== "native_argc" then
840 return v
.int_instance
(v
.arguments
.length
)
841 else if pname
== "native_argv" then
842 var txt
= v
.arguments
[args
[1].to_i
]
843 return v
.native_string_instance
(txt
)
845 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
850 redef class AbstractArray[E
]
851 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
853 self.copy_to
(start
, len
, dest
, new_start
)
857 redef class AExternInitPropdef
858 redef fun call
(v
, mpropdef
, args
)
860 var pname
= mpropdef
.mproperty
.name
861 var cname
= mpropdef
.mclassdef
.mclass
.name
862 if pname
== "native_stdout" then
863 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdout
)
864 else if pname
== "native_stdin" then
865 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdin
)
866 else if pname
== "native_stderr" then
867 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stderr
)
868 else if pname
== "io_open_read" then
869 var a1
= args
[1].val
.as(Buffer)
870 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
871 else if pname
== "io_open_write" then
872 var a1
= args
[1].val
.as(Buffer)
873 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
875 fatal
(v
, "NOT YET IMPLEMENTED extern init {mpropdef}")
880 redef class AExternMethPropdef
882 redef fun call
(v
, mpropdef
, args
)
884 var pname
= mpropdef
.mproperty
.name
885 var cname
= mpropdef
.mclassdef
.mclass
.name
886 if cname
== "Int" then
887 var recvval
= args
.first
.val
.as(Int)
888 if pname
== "rand" then
889 var res
= recvval
.rand
890 return v
.int_instance
(res
)
891 else if pname
== "native_int_to_s" then
892 return v
.native_string_instance
(recvval
.to_s
)
894 else if cname
== "NativeFile" then
895 var recvval
= args
.first
.val
896 if pname
== "io_write" then
897 var a1
= args
[1].val
.as(Buffer)
898 recvval
.as(OStream).write
(a1
.substring
(0, args
[2].to_i
))
900 else if pname
== "io_read" then
901 var str
= recvval
.as(IStream).read
(args
[2].to_i
)
902 var a1
= args
[1].val
.as(Buffer)
903 new Buffer.from
(str
).copy
(0, str
.length
, a1
, 0)
904 return v
.int_instance
(str
.length
)
905 else if pname
== "io_close" then
906 recvval
.as(IOS).close
907 return v
.int_instance
(0)
909 else if cname
== "NativeString" then
910 var recvval
= args
.first
.val
.as(Buffer)
911 if pname
== "file_exists" then
912 return v
.bool_instance
(recvval
.to_s
.file_exists
)
913 else if pname
== "file_mkdir" then
916 else if pname
== "get_environ" then
917 var txt
= recvval
.to_s
.environ
918 return v
.native_string_instance
(txt
)
919 else if pname
== "system" then
920 var res
= sys
.system
(recvval
.to_s
)
921 return v
.int_instance
(res
)
922 else if pname
== "atof" then
923 return v
.float_instance
(recvval
.to_f
)
925 else if cname
== "Int" then
926 if pname
== "rand" then
927 return v
.int_instance
(args
[0].to_i
.rand
)
929 else if cname
== "Float" then
930 if pname
== "cos" then
931 return v
.float_instance
(args
[0].to_f
.cos
)
932 else if pname
== "sin" then
933 return v
.float_instance
(args
[0].to_f
.sin
)
934 else if pname
== "tan" then
935 return v
.float_instance
(args
[0].to_f
.tan
)
936 else if pname
== "acos" then
937 return v
.float_instance
(args
[0].to_f
.acos
)
938 else if pname
== "asin" then
939 return v
.float_instance
(args
[0].to_f
.asin
)
940 else if pname
== "atan" then
941 return v
.float_instance
(args
[0].to_f
.atan
)
942 else if pname
== "sqrt" then
943 return v
.float_instance
(args
[0].to_f
.sqrt
)
944 else if pname
== "exp" then
945 return v
.float_instance
(args
[0].to_f
.exp
)
946 else if pname
== "log" then
947 return v
.float_instance
(args
[0].to_f
.log
)
948 else if pname
== "pow" then
949 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
950 else if pname
== "rand" then
951 return v
.float_instance
(args
[0].to_f
.rand
)
953 else if pname
== "native_argc" then
954 return v
.int_instance
(v
.arguments
.length
)
955 else if pname
== "native_argv" then
956 var txt
= v
.arguments
[args
[1].to_i
]
957 return v
.native_string_instance
(txt
)
958 else if pname
== "get_time" then
959 return v
.int_instance
(get_time
)
960 else if pname
== "srand_from" then
961 srand_from
(args
[1].to_i
)
963 else if pname
== "atan2" then
964 return v
.float_instance
(atan2
(args
[1].to_f
, args
[2].to_f
))
965 else if pname
== "pi" then
966 return v
.float_instance
(pi
)
967 else if pname
== "lexer_goto" then
968 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
969 else if pname
== "lexer_accept" then
970 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
971 else if pname
== "parser_goto" then
972 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
973 else if pname
== "parser_action" then
974 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
976 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
981 redef class AAttrPropdef
982 redef fun call
(v
, mpropdef
, args
)
984 var recv
= args
.first
985 assert recv
isa MutableInstance
986 var attr
= self.mpropdef
.mproperty
987 if args
.length
== 1 then
988 return v
.read_attribute
(attr
, recv
)
990 assert args
.length
== 2
991 recv
.attributes
[attr
] = args
[1]
996 # Evaluate and set the default value of the attribute in `recv`
997 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
999 assert recv
isa MutableInstance
1000 var nexpr
= self.n_expr
1001 if nexpr
!= null then
1002 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
1004 var val
= v
.expr
(nexpr
)
1007 assert not v
.is_escaping
1008 recv
.attributes
[self.mpropdef
.mproperty
] = val
1011 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1012 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1013 if mtype
isa MNullableType then
1014 recv
.attributes
[self.mpropdef
.mproperty
] = v
.null_instance
1019 redef class ADeferredMethPropdef
1020 redef fun call
(v
, mpropdef
, args
)
1022 fatal
(v
, "Deferred method called")
1027 redef class AClassdef
1028 # Execute an implicit `mpropdef` associated with the current node.
1029 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1031 var super_inits
= self.super_inits
1032 if super_inits
!= null then
1033 assert args
.length
== 1
1034 for su
in super_inits
do
1039 var recv
= args
.first
1040 assert recv
isa MutableInstance
1042 # Collect undefined attributes
1043 for npropdef
in self.n_propdefs
do
1044 if npropdef
isa AAttrPropdef and npropdef
.n_expr
== null then
1045 recv
.attributes
[npropdef
.mpropdef
.mproperty
] = args
[i
]
1054 # Evaluate the node as a possible expression.
1055 # Return a possible value
1056 # NOTE: Do not call this method directly, but use `v.expr`
1057 # This method is here to be implemented by subclasses.
1058 private fun expr
(v
: NaiveInterpreter): nullable Instance
1060 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1064 # Evaluate the node as a statement.
1065 # NOTE: Do not call this method directly, but use `v.stmt`
1066 # This method is here to be implemented by subclasses (no need to return something).
1067 private fun stmt
(v
: NaiveInterpreter)
1074 redef class ABlockExpr
1077 var last
= self.n_expr
.last
1078 for e
in self.n_expr
do
1079 if e
== last
then break
1081 if v
.is_escaping
then return null
1088 for e
in self.n_expr
do
1090 if v
.is_escaping
then return
1095 redef class AVardeclExpr
1098 var ne
= self.n_expr
1101 if i
== null then return
1102 v
.frame
.map
[self.variable
.as(not null)] = i
1107 redef class AVarExpr
1110 return v
.frame
.map
[self.variable
.as(not null)]
1114 redef class AVarAssignExpr
1117 var i
= v
.expr
(self.n_value
)
1118 if i
== null then return null
1119 v
.frame
.map
[self.variable
.as(not null)] = i
1124 redef class AVarReassignExpr
1127 var vari
= v
.frame
.map
[self.variable
.as(not null)]
1128 var value
= v
.expr
(self.n_value
)
1129 if value
== null then return
1130 var res
= v
.send
(reassign_property
.mproperty
, [vari
, value
])
1132 v
.frame
.map
[self.variable
.as(not null)] = res
1136 redef class ASelfExpr
1139 return v
.frame
.arguments
.first
1143 redef class AContinueExpr
1146 var ne
= self.n_expr
1149 if i
== null then return
1152 v
.continuemark
= self.escapemark
1156 redef class ABreakExpr
1159 var ne
= self.n_expr
1162 if i
== null then return
1165 v
.breakmark
= self.escapemark
1169 redef class AReturnExpr
1172 var ne
= self.n_expr
1175 if i
== null then return
1178 v
.returnmark
= v
.frame
1182 redef class AAbortExpr
1193 var cond
= v
.expr
(self.n_expr
)
1194 if cond
== null then return null
1195 if cond
.is_true
then
1196 return v
.expr
(self.n_then
.as(not null))
1198 return v
.expr
(self.n_else
.as(not null))
1204 var cond
= v
.expr
(self.n_expr
)
1205 if cond
== null then return
1206 if cond
.is_true
then
1214 redef class AIfexprExpr
1217 var cond
= v
.expr
(self.n_expr
)
1218 if cond
== null then return null
1219 if cond
.is_true
then
1220 return v
.expr
(self.n_then
)
1222 return v
.expr
(self.n_else
)
1230 v
.stmt
(self.n_block
)
1231 v
.is_break
(self.escapemark
) # Clear the break (if any)
1235 redef class AWhileExpr
1239 var cond
= v
.expr
(self.n_expr
)
1240 if cond
== null then return
1241 if not cond
.is_true
then return
1242 v
.stmt
(self.n_block
)
1243 if v
.is_break
(self.escapemark
) then return
1244 v
.is_continue
(self.escapemark
) # Clear the break
1245 if v
.is_escaping
then return
1250 redef class ALoopExpr
1254 v
.stmt
(self.n_block
)
1255 if v
.is_break
(self.escapemark
) then return
1256 v
.is_continue
(self.escapemark
) # Clear the break
1257 if v
.is_escaping
then return
1262 redef class AForExpr
1265 var col
= v
.expr
(self.n_expr
)
1266 if col
== null then return
1267 #self.debug("col {col}")
1268 var iter
= v
.send
(v
.force_get_primitive_method
("iterator", col
.mtype
), [col
]).as(not null)
1269 #self.debug("iter {iter}")
1271 var isok
= v
.send
(v
.force_get_primitive_method
("is_ok", iter
.mtype
), [iter
]).as(not null)
1272 if not isok
.is_true
then return
1273 if self.variables
.length
== 1 then
1274 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1275 #self.debug("item {item}")
1276 v
.frame
.map
[self.variables
.first
] = item
1277 else if self.variables
.length
== 2 then
1278 var key
= v
.send
(v
.force_get_primitive_method
("key", iter
.mtype
), [iter
]).as(not null)
1279 v
.frame
.map
[self.variables
[0]] = key
1280 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1281 v
.frame
.map
[self.variables
[1]] = item
1285 v
.stmt
(self.n_block
)
1286 if v
.is_break
(self.escapemark
) then return
1287 v
.is_continue
(self.escapemark
) # Clear the break
1288 if v
.is_escaping
then return
1289 v
.send
(v
.force_get_primitive_method
("next", iter
.mtype
), [iter
])
1294 redef class AAssertExpr
1297 var cond
= v
.expr
(self.n_expr
)
1298 if cond
== null then return
1299 if not cond
.is_true
then
1301 if v
.is_escaping
then return
1304 fatal
(v
, "Assert '{nid.text}' failed")
1306 fatal
(v
, "Assert failed")
1316 var cond
= v
.expr
(self.n_expr
)
1317 if cond
== null then return null
1318 if cond
.is_true
then return cond
1319 return v
.expr
(self.n_expr2
)
1323 redef class AAndExpr
1326 var cond
= v
.expr
(self.n_expr
)
1327 if cond
== null then return null
1328 if not cond
.is_true
then return cond
1329 return v
.expr
(self.n_expr2
)
1333 redef class ANotExpr
1336 var cond
= v
.expr
(self.n_expr
)
1337 if cond
== null then return null
1338 return v
.bool_instance
(not cond
.is_true
)
1342 redef class AOrElseExpr
1345 var i
= v
.expr
(self.n_expr
)
1346 if i
== null then return null
1347 if i
!= v
.null_instance
then return i
1348 return v
.expr
(self.n_expr2
)
1355 var i
= v
.expr
(self.n_expr
)
1356 if i
== null then return null
1357 var i2
= v
.expr
(self.n_expr2
)
1358 if i2
== null then return null
1359 return v
.bool_instance
(i
.eq_is
(i2
))
1363 redef class AIntExpr
1366 return v
.int_instance
(self.value
.as(not null))
1370 redef class AFloatExpr
1373 return v
.float_instance
(self.value
.as(not null))
1377 redef class ACharExpr
1380 return v
.char_instance
(self.value
.as(not null))
1384 redef class AArrayExpr
1387 var val
= new Array[Instance]
1388 for nexpr
in self.n_exprs
.n_exprs
do
1389 var i
= v
.expr
(nexpr
)
1390 if i
== null then return null
1393 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1394 var elttype
= mtype
.arguments
.first
1395 return v
.array_instance
(val
, elttype
)
1399 redef class AStringFormExpr
1402 var txt
= self.value
.as(not null)
1403 var nat
= v
.native_string_instance
(txt
)
1404 var res
= new MutableInstance(v
.mainmodule
.get_primitive_class
("String").mclass_type
)
1405 v
.init_instance
(res
)
1406 v
.send
(v
.force_get_primitive_method
("from_cstring", res
.mtype
), [res
, nat
])
1407 v
.check_init_instance
(res
)
1412 redef class ASuperstringExpr
1415 var array
= new Array[Instance]
1416 for nexpr
in n_exprs
do
1417 var i
= v
.expr
(nexpr
)
1418 if i
== null then return null
1421 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1422 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1428 redef class ACrangeExpr
1431 var e1
= v
.expr
(self.n_expr
)
1432 if e1
== null then return null
1433 var e2
= v
.expr
(self.n_expr2
)
1434 if e2
== null then return null
1435 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1436 var res
= new MutableInstance(mtype
)
1437 v
.init_instance
(res
)
1438 v
.send
(v
.force_get_primitive_method
("init", mtype
), [res
, e1
, e2
])
1439 v
.check_init_instance
(res
)
1444 redef class AOrangeExpr
1447 var e1
= v
.expr
(self.n_expr
)
1448 if e1
== null then return null
1449 var e2
= v
.expr
(self.n_expr2
)
1450 if e2
== null then return null
1451 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1452 var res
= new MutableInstance(mtype
)
1453 v
.init_instance
(res
)
1454 v
.send
(v
.force_get_primitive_method
("without_last", mtype
), [res
, e1
, e2
])
1455 v
.check_init_instance
(res
)
1460 redef class ATrueExpr
1463 return v
.bool_instance
(true)
1467 redef class AFalseExpr
1470 return v
.bool_instance
(false)
1474 redef class ANullExpr
1477 return v
.null_instance
1481 redef class AIsaExpr
1484 var i
= v
.expr
(self.n_expr
)
1485 if i
== null then return null
1486 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1487 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1491 redef class AAsCastExpr
1494 var i
= v
.expr
(self.n_expr
)
1495 if i
== null then return null
1496 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1497 if not v
.is_subtype
(i
.mtype
, mtype
) then
1498 #fatal(v, "Cast failed expected {mtype}, got {i}")
1499 fatal
(v
, "Cast failed")
1505 redef class AAsNotnullExpr
1508 var i
= v
.expr
(self.n_expr
)
1509 if i
== null then return null
1510 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1511 if i
.mtype
isa MNullType then
1512 fatal
(v
, "Cast failed")
1518 redef class AParExpr
1521 return v
.expr
(self.n_expr
)
1525 redef class AOnceExpr
1528 if v
.onces
.has_key
(self) then
1529 return v
.onces
[self]
1531 var res
= v
.expr
(self.n_expr
)
1532 if res
== null then return null
1539 redef class ASendExpr
1542 var recv
= v
.expr
(self.n_expr
)
1543 if recv
== null then return null
1545 for a
in self.raw_arguments
.as(not null) do
1547 if i
== null then return null
1550 for c
in self.n_closure_defs
do
1551 var mtype
= c
.mclosure
.mtype
1552 var instance
= new ClosureInstance(mtype
, v
.frame
, c
)
1555 var mproperty
= self.mproperty
.as(not null)
1557 var res
= v
.send
(mproperty
, args
)
1558 if v
.is_break
(self.escapemark
) then
1560 v
.escapevalue
= null
1566 redef class ASendReassignFormExpr
1569 var recv
= v
.expr
(self.n_expr
)
1570 if recv
== null then return
1572 for a
in self.raw_arguments
.as(not null) do
1574 if i
== null then return
1577 var value
= v
.expr
(self.n_value
)
1578 if value
== null then return
1580 var mproperty
= self.mproperty
.as(not null)
1581 var read
= v
.send
(mproperty
, args
)
1584 var write
= v
.send
(self.reassign_property
.mproperty
, [read
, value
])
1585 assert write
!= null
1589 v
.send
(self.write_mproperty
.as(not null), args
)
1593 redef class ASuperExpr
1596 var recv
= v
.frame
.arguments
.first
1598 for a
in self.n_args
.n_exprs
do
1600 if i
== null then return null
1603 if args
.length
== 1 then
1604 args
= v
.frame
.arguments
1607 var mproperty
= self.mproperty
1608 if mproperty
!= null then
1609 if mproperty
.intro
.msignature
.arity
== 0 then
1613 var res
= v
.send
(mproperty
, args
)
1617 # stantard call-next-method
1618 var mpropdef
= v
.frame
.mpropdef
1619 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1620 assert mpropdef
isa MMethodDef
1621 var res
= v
.call
(mpropdef
, args
)
1626 redef class ANewExpr
1629 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1630 var recv
: Instance = new MutableInstance(mtype
)
1631 v
.init_instance
(recv
)
1633 for a
in self.n_args
.n_exprs
do
1635 if i
== null then return null
1638 var mproperty
= self.mproperty
.as(not null)
1639 var res2
= v
.send
(mproperty
, args
)
1640 if res2
!= null then
1641 #self.debug("got {res2} from {mproperty}. drop {recv}")
1644 v
.check_init_instance
(recv
)
1649 redef class AAttrExpr
1652 var recv
= v
.expr
(self.n_expr
)
1653 if recv
== null then return null
1654 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1655 var mproperty
= self.mproperty
.as(not null)
1656 return v
.read_attribute
(mproperty
, recv
)
1660 redef class AAttrAssignExpr
1663 var recv
= v
.expr
(self.n_expr
)
1664 if recv
== null then return
1665 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1666 var i
= v
.expr
(self.n_value
)
1667 if i
== null then return
1668 var mproperty
= self.mproperty
.as(not null)
1669 assert recv
isa MutableInstance
1670 recv
.attributes
[mproperty
] = i
1674 redef class AAttrReassignExpr
1677 var recv
= v
.expr
(self.n_expr
)
1678 if recv
== null then return
1679 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1680 var value
= v
.expr
(self.n_value
)
1681 if value
== null then return
1682 var mproperty
= self.mproperty
.as(not null)
1683 var attr
= v
.read_attribute
(mproperty
, recv
)
1684 var res
= v
.send
(reassign_property
.mproperty
, [attr
, value
])
1686 assert recv
isa MutableInstance
1687 recv
.attributes
[mproperty
] = res
1691 redef class AIssetAttrExpr
1694 var recv
= v
.expr
(self.n_expr
)
1695 if recv
== null then return null
1696 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1697 var mproperty
= self.mproperty
.as(not null)
1698 assert recv
isa MutableInstance
1699 return v
.bool_instance
(recv
.attributes
.has_key
(mproperty
))
1703 redef class AClosureCallExpr
1706 var args
= new Array[Instance]
1707 for a
in self.n_args
.n_exprs
do
1709 if i
== null then return null
1712 var i
= v
.frame
.map
[self.variable
.as(not null)]
1713 assert i
isa ClosureInstance
1714 var res
= v
.call_closure
(i
, args
)
1719 redef class ADebugTypeExpr