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-binding.
304 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
306 var vararg_rank
= mpropdef
.msignature
.vararg_rank
307 if vararg_rank
>= 0 then
308 assert args
.length
>= mpropdef
.msignature
.arity
+ 1 # because of self
310 args
= new Array[Instance]
312 args
.add
(rawargs
.first
) # recv
314 for i
in [0..vararg_rank
[ do
315 args
.add
(rawargs
[i
+1])
318 var vararg_lastrank
= vararg_rank
+ rawargs
.length-1-mpropdef
.msignature
.arity
319 var vararg
= new Array[Instance]
320 for i
in [vararg_rank
..vararg_lastrank
] do
321 vararg
.add
(rawargs
[i
+1])
323 # FIXME: its it to late to determine the vararg type, this should have been done during a previous analysis
324 var elttype
= mpropdef
.msignature
.mparameters
[vararg_rank
].mtype
.anchor_to
(self.mainmodule
, args
.first
.mtype
.as(MClassType))
325 args
.add
(self.array_instance
(vararg
, elttype
))
327 for i
in [vararg_lastrank
+1..rawargs
.length-1
[ do
328 args
.add
(rawargs
[i
+1])
331 return call_without_varargs
(mpropdef
, args
)
334 # Common code to call and this function
336 # Call only executes the variadic part, this avoids
337 # double encapsulation of variadic parameters into an Array
338 fun call_without_varargs
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
340 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
341 self.discover_call_trace
.add mpropdef
342 self.debug
("Discovered {mpropdef}")
344 if args
.length
< mpropdef
.msignature
.arity
+ 1 or args
.length
> mpropdef
.msignature
.arity
+ 1 + mpropdef
.msignature
.mclosures
.length
then
345 fatal
("NOT YET IMPLEMENTED: Invalid arity for {mpropdef}. {args.length} arguments given.")
347 if args
.length
< mpropdef
.msignature
.arity
+ 1 + mpropdef
.msignature
.mclosures
.length
then
348 fatal
("NOT YET IMPLEMENTED: default closures")
351 # Look for the AST node that implements the property
352 var mproperty
= mpropdef
.mproperty
353 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
354 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
355 self.parameter_check
(npropdef
, mpropdef
, args
)
356 return npropdef
.call
(self, mpropdef
, args
)
357 else if mproperty
.name
== "init" then
358 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
359 self.parameter_check
(nclassdef
, mpropdef
, args
)
360 return nclassdef
.call
(self, mpropdef
, args
)
362 fatal
("Fatal Error: method {mpropdef} not found in the AST")
367 # Generate type checks in the C code to check covariant parameters
368 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
370 var msignature
= mpropdef
.msignature
371 for i
in [0..msignature
.arity
[ do
372 # skip test for vararg since the array is instantiated with the correct polymorphic type
373 if msignature
.vararg_rank
== i
then continue
375 # skip if the cast is not required
376 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
377 if not origmtype
.need_anchor
then continue
379 # get the parameter type
380 var mtype
= msignature
.mparameters
[i
].mtype
381 var anchor
= args
.first
.mtype
.as(MClassType)
382 mtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
383 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, mtype
) then
384 node
.fatal
(self, "Cast failed")
389 fun call_closure
(closure
: ClosureInstance, args
: Array[Instance]): nullable Instance
391 var nclosuredef
= closure
.nclosuredef
392 var f
= closure
.frame
393 for i
in [0..closure
.nclosuredef
.mclosure
.mtype
.as(MSignature).arity
[ do
394 var variable
= nclosuredef
.variables
[i
]
395 f
.map
[variable
] = args
[i
]
398 self.frames
.unshift
(f
)
400 self.stmt
(nclosuredef
.n_expr
)
404 if self.is_continue
(nclosuredef
.escapemark
) then
405 var res
= self.escapevalue
406 self.escapevalue
= null
412 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
413 # Return a falue if `mproperty` is a function, or null if it is a procedure.
414 # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
415 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
417 var recv
= args
.first
418 var mtype
= recv
.mtype
419 if mtype
isa MNullType then
420 if mproperty
.name
== "==" then
421 return self.bool_instance
(args
[0] == args
[1])
422 else if mproperty
.name
== "!=" then
423 return self.bool_instance
(args
[0] != args
[1])
425 #fatal("Reciever is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
426 fatal
("Reciever is null")
429 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
430 return self.call
(propdef
, args
)
433 # Read the attribute `mproperty` of an instance `recv` and return its value.
434 # If the attribute in not yet initialized, then aborts with an error message.
435 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
437 assert recv
isa MutableInstance
438 if not recv
.attributes
.has_key
(mproperty
) then
439 fatal
("Uninitialized attribute {mproperty.name}")
442 return recv
.attributes
[mproperty
]
445 # Collect attributes of a type in the order of their init
446 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
448 var cache
= self.collect_attr_propdef_cache
449 if cache
.has_key
(mtype
) then return cache
[mtype
]
451 var res
= new Array[AAttrPropdef]
452 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
453 self.mainmodule
.linearize_mclassdefs
(cds
)
455 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
456 for npropdef
in n
.n_propdefs
do
457 if npropdef
isa AAttrPropdef then
467 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
469 # Fill the initial values of the newly created instance `recv`.
470 # `recv.mtype` is used to know what must be filled.
471 fun init_instance
(recv
: Instance)
473 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
474 npropdef
.init_expr
(self, recv
)
478 # Check that non nullable attributes of `recv` are correctly initialized.
479 # This function is used as the last instruction of a new
480 fun check_init_instance
(recv
: Instance)
482 if not recv
isa MutableInstance then return
483 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
484 if npropdef
.n_expr
== null then
485 # Force read to check the initialization
486 self.read_attribute
(npropdef
.mpropdef
.mproperty
, recv
)
491 # This function determine the correct type according the reciever of the current definition (self).
492 fun unanchor_type
(mtype
: MType): MType
494 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
498 # An instance represents a value of the executed program.
499 abstract class Instance
500 # The dynamic type of the instance
501 # ASSERT: not self.mtype.is_anchored
504 # return true if the instance is the true value.
505 # return false if the instance is the true value.
507 fun is_true
: Bool do abort
509 # Return true if `self` IS `o` (using the Nit semantic of is)
510 fun eq_is
(o
: Instance): Bool do return self is o
512 # Human readable object identity "Type#number"
513 redef fun to_s
do return "{mtype}"
515 # Return the integer value if the instance is an integer.
517 fun to_i
: Int do abort
519 # Return the integer value if the instance is a float.
521 fun to_f
: Float do abort
523 # The real value encapsulated if the instance is primitive.
525 fun val
: Object do abort
528 # A instance with attribute (standards objects)
529 class MutableInstance
532 # The values of the attributes
533 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
536 # Special instance to handle primitives values (int, bool, etc.)
537 # The trick it just to encapsulate the <<real>> value
538 class PrimitiveInstance[E
: Object]
541 # The real value encapsulated
544 init(mtype
: MType, val
: E
)
552 if val
== true then return true
553 if val
== false then return false
559 if not o
isa PrimitiveInstance[Object] then return false
560 return self.val
== o
.val
565 if not o
isa PrimitiveInstance[Object] then return false
566 return self.val
is o
.val
569 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
571 redef fun to_i
do return val
.as(Int)
573 redef fun to_f
do return val
.as(Float)
576 private class ClosureInstance
581 var nclosuredef
: AClosureDef
583 init(mtype
: MType, frame
: Frame, nclosuredef
: AClosureDef)
587 self.nclosuredef
= nclosuredef
591 # Information about local variables in a running method
593 # The current visited node
594 # The node is stored by frame to keep a stack trace
595 var current_node
: ANode
596 # The executed property.
597 # A Method in case of a call, an attribute in case of a default initialization.
598 var mpropdef
: MPropDef
599 # Arguments of the method (the first is te receiver
600 var arguments
: Array[Instance]
601 # Mapping betwen a variable an the current value
602 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
606 # Aborts the program with a message
607 # `v` is used to know if a colored message is displayed or not
608 private fun fatal
(v
: NaiveInterpreter, message
: String)
610 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
611 stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
613 stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
614 stderr
.write
(v
.stack_trace
)
622 # Execute a `mpropdef` associated with the current node.
623 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
625 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
630 redef class AConcreteMethPropdef
631 redef fun call
(v
, mpropdef
, args
)
633 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
634 for i
in [0..mpropdef
.msignature
.arity
[ do
635 var variable
= self.n_signature
.n_params
[i
].variable
636 assert variable
!= null
637 f
.map
[variable
] = args
[i
+1]
639 for i
in [0..mpropdef
.msignature
.mclosures
.length
[ do
640 var c
= mpropdef
.msignature
.mclosures
[i
]
641 var variable
= self.n_signature
.n_closure_decls
[i
].variable
642 assert variable
!= null
643 f
.map
[variable
] = args
[i
+ 1 + mpropdef
.msignature
.arity
]
648 # Call the implicit super-init
649 var auto_super_inits
= self.auto_super_inits
650 if auto_super_inits
!= null then
651 var selfarg
= [args
.first
]
652 for auto_super_init
in auto_super_inits
do
653 if auto_super_init
.intro
.msignature
.arity
== 0 then
654 v
.send
(auto_super_init
, selfarg
)
656 v
.send
(auto_super_init
, args
)
663 if v
.returnmark
== f
then
665 var res
= v
.escapevalue
673 redef class AInternMethPropdef
674 redef fun call
(v
, mpropdef
, args
)
676 var pname
= mpropdef
.mproperty
.name
677 var cname
= mpropdef
.mclassdef
.mclass
.name
678 if pname
== "output" then
679 var recv
= args
.first
682 else if pname
== "object_id" then
683 var recv
= args
.first
684 if recv
isa PrimitiveInstance[Object] then
685 return v
.int_instance
(recv
.val
.object_id
)
687 return v
.int_instance
(recv
.object_id
)
689 else if pname
== "output_class_name" then
690 var recv
= args
.first
693 else if pname
== "native_class_name" then
694 var recv
= args
.first
695 var txt
= recv
.mtype
.to_s
696 return v
.native_string_instance
(txt
)
697 else if pname
== "==" then
698 # == is correclt redefined for instances
699 return v
.bool_instance
(args
[0] == args
[1])
700 else if pname
== "!=" then
701 return v
.bool_instance
(args
[0] != args
[1])
702 else if pname
== "is_same_type" then
703 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
704 else if pname
== "exit" then
707 else if pname
== "sys" then
709 else if cname
== "Int" then
710 if pname
== "unary -" then
711 return v
.int_instance
(-args
[0].to_i
)
712 else if pname
== "succ" then
713 return v
.int_instance
(args
[0].to_i
+ 1)
714 else if pname
== "prec" then
715 return v
.int_instance
(args
[0].to_i
- 1)
716 else if pname
== "+" then
717 return v
.int_instance
(args
[0].to_i
+ args
[1].to_i
)
718 else if pname
== "-" then
719 return v
.int_instance
(args
[0].to_i
- args
[1].to_i
)
720 else if pname
== "*" then
721 return v
.int_instance
(args
[0].to_i
* args
[1].to_i
)
722 else if pname
== "%" then
723 return v
.int_instance
(args
[0].to_i
% args
[1].to_i
)
724 else if pname
== "/" then
725 return v
.int_instance
(args
[0].to_i
/ args
[1].to_i
)
726 else if pname
== "<" then
727 return v
.bool_instance
(args
[0].to_i
< args
[1].to_i
)
728 else if pname
== ">" then
729 return v
.bool_instance
(args
[0].to_i
> args
[1].to_i
)
730 else if pname
== "<=" then
731 return v
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
732 else if pname
== ">=" then
733 return v
.bool_instance
(args
[0].to_i
>= args
[1].to_i
)
734 else if pname
== "<=>" then
735 return v
.int_instance
(args
[0].to_i
<=> args
[1].to_i
)
736 else if pname
== "ascii" then
737 return v
.char_instance
(args
[0].to_i
.ascii
)
738 else if pname
== "to_f" then
739 return v
.float_instance
(args
[0].to_i
.to_f
)
740 else if pname
== "lshift" then
741 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
742 else if pname
== "rshift" then
743 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
745 else if cname
== "Char" then
746 var recv
= args
[0].val
.as(Char)
747 if pname
== "ascii" then
748 return v
.int_instance
(recv
.ascii
)
749 else if pname
== "succ" then
750 return v
.char_instance
(recv
.succ
)
751 else if pname
== "prec" then
752 return v
.char_instance
(recv
.prec
)
753 else if pname
== "<" then
754 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
755 else if pname
== ">" then
756 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
757 else if pname
== "<=" then
758 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
759 else if pname
== ">=" then
760 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
761 else if pname
== "<=>" then
762 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
764 else if cname
== "Float" then
765 var recv
= args
[0].to_f
766 if pname
== "unary -" then
767 return v
.float_instance
(-recv
)
768 else if pname
== "+" then
769 return v
.float_instance
(recv
+ args
[1].to_f
)
770 else if pname
== "-" then
771 return v
.float_instance
(recv
- args
[1].to_f
)
772 else if pname
== "*" then
773 return v
.float_instance
(recv
* args
[1].to_f
)
774 else if pname
== "/" then
775 return v
.float_instance
(recv
/ args
[1].to_f
)
776 else if pname
== "<" then
777 return v
.bool_instance
(recv
< args
[1].to_f
)
778 else if pname
== ">" then
779 return v
.bool_instance
(recv
> args
[1].to_f
)
780 else if pname
== "<=" then
781 return v
.bool_instance
(recv
<= args
[1].to_f
)
782 else if pname
== ">=" then
783 return v
.bool_instance
(recv
>= args
[1].to_f
)
784 else if pname
== "to_i" then
785 return v
.int_instance
(recv
.to_i
)
787 else if cname
== "NativeString" then
788 var recvval
= args
.first
.val
.as(Buffer)
789 if pname
== "[]" then
790 var arg1
= args
[1].to_i
791 if arg1
>= recvval
.length
or arg1
< 0 then
792 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
794 return v
.char_instance
(recvval
[arg1
])
795 else if pname
== "[]=" then
796 var arg1
= args
[1].to_i
797 if arg1
>= recvval
.length
or arg1
< 0 then
798 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
800 recvval
[arg1
] = args
[2].val
.as(Char)
802 else if pname
== "copy_to" then
803 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
804 var destval
= args
[1].val
.as(Buffer)
805 var lenval
= args
[2].to_i
806 var fromval
= args
[3].to_i
807 var toval
= args
[4].to_i
809 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
811 if fromval
+ lenval
>= recvval
.length
then
812 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
815 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
817 if toval
+ lenval
>= destval
.length
then
818 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
820 recvval
.copy
(fromval
, lenval
, destval
, toval
)
822 else if pname
== "atoi" then
823 return v
.int_instance
(recvval
.to_i
)
825 else if pname
== "calloc_string" then
826 return v
.native_string_instance
("!" * args
[1].to_i
)
827 else if cname
== "NativeArray" then
828 var recvval
= args
.first
.val
.as(Array[Instance])
829 if pname
== "[]" then
830 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
831 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
833 return recvval
[args
[1].to_i
]
834 else if pname
== "[]=" then
835 recvval
[args
[1].to_i
] = args
[2]
837 else if pname
== "copy_to" then
838 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
841 else if pname
== "calloc_array" then
842 var recvtype
= args
.first
.mtype
.as(MClassType)
844 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
845 mtype
= mtype
.arguments
.first
846 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
847 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
848 else if pname
== "native_argc" then
849 return v
.int_instance
(v
.arguments
.length
)
850 else if pname
== "native_argv" then
851 var txt
= v
.arguments
[args
[1].to_i
]
852 return v
.native_string_instance
(txt
)
854 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
859 redef class AbstractArray[E
]
860 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
862 self.copy_to
(start
, len
, dest
, new_start
)
866 redef class AExternInitPropdef
867 redef fun call
(v
, mpropdef
, args
)
869 var pname
= mpropdef
.mproperty
.name
870 var cname
= mpropdef
.mclassdef
.mclass
.name
871 if pname
== "native_stdout" then
872 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdout
)
873 else if pname
== "native_stdin" then
874 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdin
)
875 else if pname
== "native_stderr" then
876 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stderr
)
877 else if pname
== "io_open_read" then
878 var a1
= args
[1].val
.as(Buffer)
879 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
880 else if pname
== "io_open_write" then
881 var a1
= args
[1].val
.as(Buffer)
882 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
884 fatal
(v
, "NOT YET IMPLEMENTED extern init {mpropdef}")
889 redef class AExternMethPropdef
891 redef fun call
(v
, mpropdef
, args
)
893 var pname
= mpropdef
.mproperty
.name
894 var cname
= mpropdef
.mclassdef
.mclass
.name
895 if cname
== "Int" then
896 var recvval
= args
.first
.val
.as(Int)
897 if pname
== "rand" then
898 var res
= recvval
.rand
899 return v
.int_instance
(res
)
900 else if pname
== "native_int_to_s" then
901 return v
.native_string_instance
(recvval
.to_s
)
903 else if cname
== "NativeFile" then
904 var recvval
= args
.first
.val
905 if pname
== "io_write" then
906 var a1
= args
[1].val
.as(Buffer)
907 recvval
.as(OStream).write
(a1
.substring
(0, args
[2].to_i
))
909 else if pname
== "io_read" then
910 var str
= recvval
.as(IStream).read
(args
[2].to_i
)
911 var a1
= args
[1].val
.as(Buffer)
912 new Buffer.from
(str
).copy
(0, str
.length
, a1
, 0)
913 return v
.int_instance
(str
.length
)
914 else if pname
== "io_close" then
915 recvval
.as(IOS).close
916 return v
.int_instance
(0)
918 else if cname
== "NativeString" then
919 var recvval
= args
.first
.val
.as(Buffer)
920 if pname
== "file_exists" then
921 return v
.bool_instance
(recvval
.to_s
.file_exists
)
922 else if pname
== "file_mkdir" then
925 else if pname
== "file_chdir" then
928 else if pname
== "get_environ" then
929 var txt
= recvval
.to_s
.environ
930 return v
.native_string_instance
(txt
)
931 else if pname
== "system" then
932 var res
= sys
.system
(recvval
.to_s
)
933 return v
.int_instance
(res
)
934 else if pname
== "atof" then
935 return v
.float_instance
(recvval
.to_f
)
937 else if cname
== "Int" then
938 if pname
== "rand" then
939 return v
.int_instance
(args
[0].to_i
.rand
)
941 else if cname
== "Float" then
942 if pname
== "cos" then
943 return v
.float_instance
(args
[0].to_f
.cos
)
944 else if pname
== "sin" then
945 return v
.float_instance
(args
[0].to_f
.sin
)
946 else if pname
== "tan" then
947 return v
.float_instance
(args
[0].to_f
.tan
)
948 else if pname
== "acos" then
949 return v
.float_instance
(args
[0].to_f
.acos
)
950 else if pname
== "asin" then
951 return v
.float_instance
(args
[0].to_f
.asin
)
952 else if pname
== "atan" then
953 return v
.float_instance
(args
[0].to_f
.atan
)
954 else if pname
== "sqrt" then
955 return v
.float_instance
(args
[0].to_f
.sqrt
)
956 else if pname
== "exp" then
957 return v
.float_instance
(args
[0].to_f
.exp
)
958 else if pname
== "log" then
959 return v
.float_instance
(args
[0].to_f
.log
)
960 else if pname
== "pow" then
961 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
962 else if pname
== "rand" then
963 return v
.float_instance
(args
[0].to_f
.rand
)
965 else if pname
== "native_argc" then
966 return v
.int_instance
(v
.arguments
.length
)
967 else if pname
== "native_argv" then
968 var txt
= v
.arguments
[args
[1].to_i
]
969 return v
.native_string_instance
(txt
)
970 else if pname
== "get_time" then
971 return v
.int_instance
(get_time
)
972 else if pname
== "srand_from" then
973 srand_from
(args
[1].to_i
)
975 else if pname
== "atan2" then
976 return v
.float_instance
(atan2
(args
[1].to_f
, args
[2].to_f
))
977 else if pname
== "pi" then
978 return v
.float_instance
(pi
)
979 else if pname
== "lexer_goto" then
980 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
981 else if pname
== "lexer_accept" then
982 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
983 else if pname
== "parser_goto" then
984 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
985 else if pname
== "parser_action" then
986 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
987 else if pname
== "file_getcwd" then
988 return v
.native_string_instance
(getcwd
)
990 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
995 redef class AAttrPropdef
996 redef fun call
(v
, mpropdef
, args
)
998 var recv
= args
.first
999 assert recv
isa MutableInstance
1000 var attr
= self.mpropdef
.mproperty
1001 if args
.length
== 1 then
1002 return v
.read_attribute
(attr
, recv
)
1004 assert args
.length
== 2
1005 recv
.attributes
[attr
] = args
[1]
1010 # Evaluate and set the default value of the attribute in `recv`
1011 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1013 assert recv
isa MutableInstance
1014 var nexpr
= self.n_expr
1015 if nexpr
!= null then
1016 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
1018 var val
= v
.expr
(nexpr
)
1021 assert not v
.is_escaping
1022 recv
.attributes
[self.mpropdef
.mproperty
] = val
1025 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1026 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1027 if mtype
isa MNullableType then
1028 recv
.attributes
[self.mpropdef
.mproperty
] = v
.null_instance
1033 redef class ADeferredMethPropdef
1034 redef fun call
(v
, mpropdef
, args
)
1036 fatal
(v
, "Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
1041 redef class AClassdef
1042 # Execute an implicit `mpropdef` associated with the current node.
1043 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1045 var super_inits
= self.super_inits
1046 if super_inits
!= null then
1047 assert args
.length
== 1
1048 for su
in super_inits
do
1053 var recv
= args
.first
1054 assert recv
isa MutableInstance
1056 # Collect undefined attributes
1057 for npropdef
in self.n_propdefs
do
1058 if npropdef
isa AAttrPropdef and npropdef
.n_expr
== null then
1059 recv
.attributes
[npropdef
.mpropdef
.mproperty
] = args
[i
]
1068 # Evaluate the node as a possible expression.
1069 # Return a possible value
1070 # NOTE: Do not call this method directly, but use `v.expr`
1071 # This method is here to be implemented by subclasses.
1072 private fun expr
(v
: NaiveInterpreter): nullable Instance
1074 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1078 # Evaluate the node as a statement.
1079 # NOTE: Do not call this method directly, but use `v.stmt`
1080 # This method is here to be implemented by subclasses (no need to return something).
1081 private fun stmt
(v
: NaiveInterpreter)
1088 redef class ABlockExpr
1091 var last
= self.n_expr
.last
1092 for e
in self.n_expr
do
1093 if e
== last
then break
1095 if v
.is_escaping
then return null
1102 for e
in self.n_expr
do
1104 if v
.is_escaping
then return
1109 redef class AVardeclExpr
1112 var ne
= self.n_expr
1115 if i
== null then return
1116 v
.frame
.map
[self.variable
.as(not null)] = i
1121 redef class AVarExpr
1124 return v
.frame
.map
[self.variable
.as(not null)]
1128 redef class AVarAssignExpr
1131 var i
= v
.expr
(self.n_value
)
1132 if i
== null then return null
1133 v
.frame
.map
[self.variable
.as(not null)] = i
1138 redef class AVarReassignExpr
1141 var vari
= v
.frame
.map
[self.variable
.as(not null)]
1142 var value
= v
.expr
(self.n_value
)
1143 if value
== null then return
1144 var res
= v
.send
(reassign_property
.mproperty
, [vari
, value
])
1146 v
.frame
.map
[self.variable
.as(not null)] = res
1150 redef class ASelfExpr
1153 return v
.frame
.arguments
.first
1157 redef class AContinueExpr
1160 var ne
= self.n_expr
1163 if i
== null then return
1166 v
.continuemark
= self.escapemark
1170 redef class ABreakExpr
1173 var ne
= self.n_expr
1176 if i
== null then return
1179 v
.breakmark
= self.escapemark
1183 redef class AReturnExpr
1186 var ne
= self.n_expr
1189 if i
== null then return
1192 v
.returnmark
= v
.frame
1196 redef class AAbortExpr
1207 var cond
= v
.expr
(self.n_expr
)
1208 if cond
== null then return null
1209 if cond
.is_true
then
1210 return v
.expr
(self.n_then
.as(not null))
1212 return v
.expr
(self.n_else
.as(not null))
1218 var cond
= v
.expr
(self.n_expr
)
1219 if cond
== null then return
1220 if cond
.is_true
then
1228 redef class AIfexprExpr
1231 var cond
= v
.expr
(self.n_expr
)
1232 if cond
== null then return null
1233 if cond
.is_true
then
1234 return v
.expr
(self.n_then
)
1236 return v
.expr
(self.n_else
)
1244 v
.stmt
(self.n_block
)
1245 v
.is_break
(self.escapemark
) # Clear the break (if any)
1249 redef class AWhileExpr
1253 var cond
= v
.expr
(self.n_expr
)
1254 if cond
== null then return
1255 if not cond
.is_true
then return
1256 v
.stmt
(self.n_block
)
1257 if v
.is_break
(self.escapemark
) then return
1258 v
.is_continue
(self.escapemark
) # Clear the break
1259 if v
.is_escaping
then return
1264 redef class ALoopExpr
1268 v
.stmt
(self.n_block
)
1269 if v
.is_break
(self.escapemark
) then return
1270 v
.is_continue
(self.escapemark
) # Clear the break
1271 if v
.is_escaping
then return
1276 redef class AForExpr
1279 var col
= v
.expr
(self.n_expr
)
1280 if col
== null then return
1281 #self.debug("col {col}")
1282 var iter
= v
.send
(v
.force_get_primitive_method
("iterator", col
.mtype
), [col
]).as(not null)
1283 #self.debug("iter {iter}")
1285 var isok
= v
.send
(v
.force_get_primitive_method
("is_ok", iter
.mtype
), [iter
]).as(not null)
1286 if not isok
.is_true
then return
1287 if self.variables
.length
== 1 then
1288 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1289 #self.debug("item {item}")
1290 v
.frame
.map
[self.variables
.first
] = item
1291 else if self.variables
.length
== 2 then
1292 var key
= v
.send
(v
.force_get_primitive_method
("key", iter
.mtype
), [iter
]).as(not null)
1293 v
.frame
.map
[self.variables
[0]] = key
1294 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1295 v
.frame
.map
[self.variables
[1]] = item
1299 v
.stmt
(self.n_block
)
1300 if v
.is_break
(self.escapemark
) then return
1301 v
.is_continue
(self.escapemark
) # Clear the break
1302 if v
.is_escaping
then return
1303 v
.send
(v
.force_get_primitive_method
("next", iter
.mtype
), [iter
])
1308 redef class AAssertExpr
1311 var cond
= v
.expr
(self.n_expr
)
1312 if cond
== null then return
1313 if not cond
.is_true
then
1315 if v
.is_escaping
then return
1318 fatal
(v
, "Assert '{nid.text}' failed")
1320 fatal
(v
, "Assert failed")
1330 var cond
= v
.expr
(self.n_expr
)
1331 if cond
== null then return null
1332 if cond
.is_true
then return cond
1333 return v
.expr
(self.n_expr2
)
1337 redef class AImpliesExpr
1340 var cond
= v
.expr
(self.n_expr
)
1341 if cond
== null then return null
1342 if not cond
.is_true
then return v
.true_instance
1343 return v
.expr
(self.n_expr2
)
1347 redef class AAndExpr
1350 var cond
= v
.expr
(self.n_expr
)
1351 if cond
== null then return null
1352 if not cond
.is_true
then return cond
1353 return v
.expr
(self.n_expr2
)
1357 redef class ANotExpr
1360 var cond
= v
.expr
(self.n_expr
)
1361 if cond
== null then return null
1362 return v
.bool_instance
(not cond
.is_true
)
1366 redef class AOrElseExpr
1369 var i
= v
.expr
(self.n_expr
)
1370 if i
== null then return null
1371 if i
!= v
.null_instance
then return i
1372 return v
.expr
(self.n_expr2
)
1379 var i
= v
.expr
(self.n_expr
)
1380 if i
== null then return null
1381 var i2
= v
.expr
(self.n_expr2
)
1382 if i2
== null then return null
1383 return v
.bool_instance
(i
.eq_is
(i2
))
1387 redef class AIntExpr
1390 return v
.int_instance
(self.value
.as(not null))
1394 redef class AFloatExpr
1397 return v
.float_instance
(self.value
.as(not null))
1401 redef class ACharExpr
1404 return v
.char_instance
(self.value
.as(not null))
1408 redef class AArrayExpr
1411 var val
= new Array[Instance]
1412 for nexpr
in self.n_exprs
.n_exprs
do
1413 var i
= v
.expr
(nexpr
)
1414 if i
== null then return null
1417 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1418 var elttype
= mtype
.arguments
.first
1419 return v
.array_instance
(val
, elttype
)
1423 redef class AStringFormExpr
1426 var txt
= self.value
.as(not null)
1427 var nat
= v
.native_string_instance
(txt
)
1428 var res
= v
.send
(v
.force_get_primitive_method
("to_s", nat
.mtype
), [nat
]).as(not null)
1433 redef class ASuperstringExpr
1436 var array
= new Array[Instance]
1437 for nexpr
in n_exprs
do
1438 var i
= v
.expr
(nexpr
)
1439 if i
== null then return null
1442 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1443 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1449 redef class ACrangeExpr
1452 var e1
= v
.expr
(self.n_expr
)
1453 if e1
== null then return null
1454 var e2
= v
.expr
(self.n_expr2
)
1455 if e2
== null then return null
1456 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1457 var res
= new MutableInstance(mtype
)
1458 v
.init_instance
(res
)
1459 v
.send
(v
.force_get_primitive_method
("init", mtype
), [res
, e1
, e2
])
1460 v
.check_init_instance
(res
)
1465 redef class AOrangeExpr
1468 var e1
= v
.expr
(self.n_expr
)
1469 if e1
== null then return null
1470 var e2
= v
.expr
(self.n_expr2
)
1471 if e2
== null then return null
1472 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1473 var res
= new MutableInstance(mtype
)
1474 v
.init_instance
(res
)
1475 v
.send
(v
.force_get_primitive_method
("without_last", mtype
), [res
, e1
, e2
])
1476 v
.check_init_instance
(res
)
1481 redef class ATrueExpr
1484 return v
.bool_instance
(true)
1488 redef class AFalseExpr
1491 return v
.bool_instance
(false)
1495 redef class ANullExpr
1498 return v
.null_instance
1502 redef class AIsaExpr
1505 var i
= v
.expr
(self.n_expr
)
1506 if i
== null then return null
1507 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1508 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1512 redef class AAsCastExpr
1515 var i
= v
.expr
(self.n_expr
)
1516 if i
== null then return null
1517 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1518 if not v
.is_subtype
(i
.mtype
, mtype
) then
1519 #fatal(v, "Cast failed expected {mtype}, got {i}")
1520 fatal
(v
, "Cast failed")
1526 redef class AAsNotnullExpr
1529 var i
= v
.expr
(self.n_expr
)
1530 if i
== null then return null
1531 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1532 if i
.mtype
isa MNullType then
1533 fatal
(v
, "Cast failed")
1539 redef class AParExpr
1542 return v
.expr
(self.n_expr
)
1546 redef class AOnceExpr
1549 if v
.onces
.has_key
(self) then
1550 return v
.onces
[self]
1552 var res
= v
.expr
(self.n_expr
)
1553 if res
== null then return null
1560 redef class ASendExpr
1563 var recv
= v
.expr
(self.n_expr
)
1564 if recv
== null then return null
1566 for a
in self.raw_arguments
.as(not null) do
1568 if i
== null then return null
1571 for c
in self.n_closure_defs
do
1572 var mtype
= c
.mclosure
.mtype
1573 var instance
= new ClosureInstance(mtype
, v
.frame
, c
)
1576 var mproperty
= self.mproperty
.as(not null)
1578 var res
= v
.send
(mproperty
, args
)
1579 if v
.is_break
(self.escapemark
) then
1581 v
.escapevalue
= null
1587 redef class ASendReassignFormExpr
1590 var recv
= v
.expr
(self.n_expr
)
1591 if recv
== null then return
1593 for a
in self.raw_arguments
.as(not null) do
1595 if i
== null then return
1598 var value
= v
.expr
(self.n_value
)
1599 if value
== null then return
1601 var mproperty
= self.mproperty
.as(not null)
1602 var read
= v
.send
(mproperty
, args
)
1605 var write
= v
.send
(self.reassign_property
.mproperty
, [read
, value
])
1606 assert write
!= null
1610 v
.send
(self.write_mproperty
.as(not null), args
)
1614 redef class ASuperExpr
1617 var recv
= v
.frame
.arguments
.first
1619 for a
in self.n_args
.n_exprs
do
1621 if i
== null then return null
1624 if args
.length
== 1 then
1625 args
= v
.frame
.arguments
1628 var mproperty
= self.mproperty
1629 if mproperty
!= null then
1630 if mproperty
.intro
.msignature
.arity
== 0 then
1634 var res
= v
.send
(mproperty
, args
)
1638 # stantard call-next-method
1639 var mpropdef
= v
.frame
.mpropdef
1640 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1641 assert mpropdef
isa MMethodDef
1642 var res
= v
.call_without_varargs
(mpropdef
, args
)
1647 redef class ANewExpr
1650 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1651 var recv
: Instance = new MutableInstance(mtype
)
1652 v
.init_instance
(recv
)
1654 for a
in self.n_args
.n_exprs
do
1656 if i
== null then return null
1659 var mproperty
= self.mproperty
.as(not null)
1660 var res2
= v
.send
(mproperty
, args
)
1661 if res2
!= null then
1662 #self.debug("got {res2} from {mproperty}. drop {recv}")
1665 v
.check_init_instance
(recv
)
1670 redef class AAttrExpr
1673 var recv
= v
.expr
(self.n_expr
)
1674 if recv
== null then return null
1675 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1676 var mproperty
= self.mproperty
.as(not null)
1677 return v
.read_attribute
(mproperty
, recv
)
1681 redef class AAttrAssignExpr
1684 var recv
= v
.expr
(self.n_expr
)
1685 if recv
== null then return
1686 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1687 var i
= v
.expr
(self.n_value
)
1688 if i
== null then return
1689 var mproperty
= self.mproperty
.as(not null)
1690 assert recv
isa MutableInstance
1691 recv
.attributes
[mproperty
] = i
1695 redef class AAttrReassignExpr
1698 var recv
= v
.expr
(self.n_expr
)
1699 if recv
== null then return
1700 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1701 var value
= v
.expr
(self.n_value
)
1702 if value
== null then return
1703 var mproperty
= self.mproperty
.as(not null)
1704 var attr
= v
.read_attribute
(mproperty
, recv
)
1705 var res
= v
.send
(reassign_property
.mproperty
, [attr
, value
])
1707 assert recv
isa MutableInstance
1708 recv
.attributes
[mproperty
] = res
1712 redef class AIssetAttrExpr
1715 var recv
= v
.expr
(self.n_expr
)
1716 if recv
== null then return null
1717 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1718 var mproperty
= self.mproperty
.as(not null)
1719 assert recv
isa MutableInstance
1720 return v
.bool_instance
(recv
.attributes
.has_key
(mproperty
))
1724 redef class AClosureCallExpr
1727 var args
= new Array[Instance]
1728 for a
in self.n_args
.n_exprs
do
1730 if i
== null then return null
1733 var i
= v
.frame
.map
[self.variable
.as(not null)]
1734 assert i
isa ClosureInstance
1735 var res
= v
.call_closure
(i
, args
)
1740 redef class ADebugTypeExpr