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. Expected `{implicit_cast_to}`, got `{i.mtype}`")
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 # Common code for calls to injected methods and normal methods
302 fun call_commons
(mpropdef
: MMethodDef, args
: Array[Instance]): Array[Instance]
304 var vararg_rank
= mpropdef
.msignature
.vararg_rank
305 if vararg_rank
>= 0 then
306 assert args
.length
>= mpropdef
.msignature
.arity
+ 1 # because of self
308 args
= new Array[Instance]
310 args
.add
(rawargs
.first
) # recv
312 for i
in [0..vararg_rank
[ do
313 args
.add
(rawargs
[i
+1])
316 var vararg_lastrank
= vararg_rank
+ rawargs
.length-1-mpropdef
.msignature
.arity
317 var vararg
= new Array[Instance]
318 for i
in [vararg_rank
..vararg_lastrank
] do
319 vararg
.add
(rawargs
[i
+1])
321 # FIXME: its it to late to determine the vararg type, this should have been done during a previous analysis
322 var elttype
= mpropdef
.msignature
.mparameters
[vararg_rank
].mtype
.anchor_to
(self.mainmodule
, args
.first
.mtype
.as(MClassType))
323 args
.add
(self.array_instance
(vararg
, elttype
))
325 for i
in [vararg_lastrank
+1..rawargs
.length-1
[ do
326 args
.add
(rawargs
[i
+1])
332 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
333 # Return a falue if `mpropdef` is a function, or null if it is a procedure.
334 # The call is direct/static. There is no message-seding/late-binding.
335 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
337 args
= call_commons
(mpropdef
, args
)
338 return call_without_varargs
(mpropdef
, args
)
341 # Common code to call and this function
343 # Call only executes the variadic part, this avoids
344 # double encapsulation of variadic parameters into an Array
345 fun call_without_varargs
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
347 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
348 self.discover_call_trace
.add mpropdef
349 self.debug
("Discovered {mpropdef}")
351 if args
.length
< mpropdef
.msignature
.arity
+ 1 or args
.length
> mpropdef
.msignature
.arity
+ 1 then
352 fatal
("NOT YET IMPLEMENTED: Invalid arity for {mpropdef}. {args.length} arguments given.")
355 # Look for the AST node that implements the property
356 var mproperty
= mpropdef
.mproperty
357 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
358 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
359 self.parameter_check
(npropdef
, mpropdef
, args
)
360 return npropdef
.call
(self, mpropdef
, args
)
361 else if mproperty
.name
== "init" then
362 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
363 self.parameter_check
(nclassdef
, mpropdef
, args
)
364 return nclassdef
.call
(self, mpropdef
, args
)
366 fatal
("Fatal Error: method {mpropdef} not found in the AST")
371 # Generate type checks in the C code to check covariant parameters
372 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
374 var msignature
= mpropdef
.msignature
375 for i
in [0..msignature
.arity
[ do
376 # skip test for vararg since the array is instantiated with the correct polymorphic type
377 if msignature
.vararg_rank
== i
then continue
379 # skip if the cast is not required
380 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
381 if not origmtype
.need_anchor
then continue
383 # get the parameter type
384 var mtype
= msignature
.mparameters
[i
].mtype
385 var anchor
= args
.first
.mtype
.as(MClassType)
386 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
387 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
388 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
393 # Common code for runtime injected calls and normal calls
394 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
396 if mtype
isa MNullType then
397 if mproperty
.name
== "==" then
398 return self.bool_instance
(args
[0] == args
[1])
399 else if mproperty
.name
== "!=" then
400 return self.bool_instance
(args
[0] != args
[1])
402 #fatal("Reciever is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
403 fatal
("Reciever is null")
408 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
409 # Return a falue if `mproperty` is a function, or null if it is a procedure.
410 # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
411 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
413 var recv
= args
.first
414 var mtype
= recv
.mtype
415 var ret
= send_commons
(mproperty
, args
, mtype
)
416 if ret
!= null then return ret
417 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
418 return self.call
(propdef
, args
)
421 # Read the attribute `mproperty` of an instance `recv` and return its value.
422 # If the attribute in not yet initialized, then aborts with an error message.
423 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
425 assert recv
isa MutableInstance
426 if not recv
.attributes
.has_key
(mproperty
) then
427 fatal
("Uninitialized attribute {mproperty.name}")
430 return recv
.attributes
[mproperty
]
433 # Collect attributes of a type in the order of their init
434 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
436 var cache
= self.collect_attr_propdef_cache
437 if cache
.has_key
(mtype
) then return cache
[mtype
]
439 var res
= new Array[AAttrPropdef]
440 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
441 self.mainmodule
.linearize_mclassdefs
(cds
)
443 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
444 for npropdef
in n
.n_propdefs
do
445 if npropdef
isa AAttrPropdef then
455 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
457 # Fill the initial values of the newly created instance `recv`.
458 # `recv.mtype` is used to know what must be filled.
459 fun init_instance
(recv
: Instance)
461 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
462 npropdef
.init_expr
(self, recv
)
466 # Check that non nullable attributes of `recv` are correctly initialized.
467 # This function is used as the last instruction of a new
468 fun check_init_instance
(recv
: Instance)
470 if not recv
isa MutableInstance then return
471 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
472 if npropdef
.n_expr
== null then
473 # Force read to check the initialization
474 self.read_attribute
(npropdef
.mpropdef
.mproperty
, recv
)
479 # This function determine the correct type according the reciever of the current definition (self).
480 fun unanchor_type
(mtype
: MType): MType
482 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
486 # An instance represents a value of the executed program.
487 abstract class Instance
488 # The dynamic type of the instance
489 # ASSERT: not self.mtype.is_anchored
492 # return true if the instance is the true value.
493 # return false if the instance is the true value.
495 fun is_true
: Bool do abort
497 # Return true if `self` IS `o` (using the Nit semantic of is)
498 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
500 # Human readable object identity "Type#number"
501 redef fun to_s
do return "{mtype}"
503 # Return the integer value if the instance is an integer.
505 fun to_i
: Int do abort
507 # Return the integer value if the instance is a float.
509 fun to_f
: Float do abort
511 # The real value encapsulated if the instance is primitive.
513 fun val
: Object do abort
516 # A instance with attribute (standards objects)
517 class MutableInstance
520 # The values of the attributes
521 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
524 # Special instance to handle primitives values (int, bool, etc.)
525 # The trick it just to encapsulate the <<real>> value
526 class PrimitiveInstance[E
: Object]
529 # The real value encapsulated
532 init(mtype
: MType, val
: E
)
540 if val
== true then return true
541 if val
== false then return false
547 if not o
isa PrimitiveInstance[Object] then return false
548 return self.val
== o
.val
553 if not o
isa PrimitiveInstance[Object] then return false
554 return self.val
.is_same_instance
(o
.val
)
557 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
559 redef fun to_i
do return val
.as(Int)
561 redef fun to_f
do return val
.as(Float)
564 # Information about local variables in a running method
566 # The current visited node
567 # The node is stored by frame to keep a stack trace
568 var current_node
: ANode
569 # The executed property.
570 # A Method in case of a call, an attribute in case of a default initialization.
571 var mpropdef
: MPropDef
572 # Arguments of the method (the first is te receiver
573 var arguments
: Array[Instance]
574 # Mapping betwen a variable an the current value
575 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
579 # Aborts the program with a message
580 # `v` is used to know if a colored message is displayed or not
581 private fun fatal
(v
: NaiveInterpreter, message
: String)
583 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
584 stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
586 stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
587 stderr
.write
(v
.stack_trace
)
595 # Execute a `mpropdef` associated with the current node.
596 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
598 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
603 redef class AConcreteMethPropdef
605 redef fun call
(v
, mpropdef
, args
)
607 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
608 call_commons
(v
, mpropdef
, args
, f
)
610 if v
.returnmark
== f
then
612 var res
= v
.escapevalue
619 private fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance], f
: Frame)
621 for i
in [0..mpropdef
.msignature
.arity
[ do
622 var variable
= self.n_signature
.n_params
[i
].variable
623 assert variable
!= null
624 f
.map
[variable
] = args
[i
+1]
629 # Call the implicit super-init
630 var auto_super_inits
= self.auto_super_inits
631 if auto_super_inits
!= null then
632 var selfarg
= [args
.first
]
633 for auto_super_init
in auto_super_inits
do
634 if auto_super_init
.intro
.msignature
.arity
== 0 then
635 v
.send
(auto_super_init
, selfarg
)
637 v
.send
(auto_super_init
, args
)
646 redef class AInternMethPropdef
647 redef fun call
(v
, mpropdef
, args
)
649 var pname
= mpropdef
.mproperty
.name
650 var cname
= mpropdef
.mclassdef
.mclass
.name
651 if pname
== "output" then
652 var recv
= args
.first
655 else if pname
== "object_id" then
656 var recv
= args
.first
657 if recv
isa PrimitiveInstance[Object] then
658 return v
.int_instance
(recv
.val
.object_id
)
660 return v
.int_instance
(recv
.object_id
)
662 else if pname
== "output_class_name" then
663 var recv
= args
.first
666 else if pname
== "native_class_name" then
667 var recv
= args
.first
668 var txt
= recv
.mtype
.to_s
669 return v
.native_string_instance
(txt
)
670 else if pname
== "==" then
671 # == is correclt redefined for instances
672 return v
.bool_instance
(args
[0] == args
[1])
673 else if pname
== "!=" then
674 return v
.bool_instance
(args
[0] != args
[1])
675 else if pname
== "is_same_type" then
676 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
677 else if pname
== "is_same_instance" then
678 return v
.bool_instance
(args
[1] != null and args
[0].eq_is
(args
[1]))
679 else if pname
== "exit" then
682 else if pname
== "sys" then
684 else if cname
== "Int" then
685 if pname
== "unary -" then
686 return v
.int_instance
(-args
[0].to_i
)
687 else if pname
== "succ" then
688 return v
.int_instance
(args
[0].to_i
+ 1)
689 else if pname
== "prec" then
690 return v
.int_instance
(args
[0].to_i
- 1)
691 else if pname
== "+" then
692 return v
.int_instance
(args
[0].to_i
+ args
[1].to_i
)
693 else if pname
== "-" then
694 return v
.int_instance
(args
[0].to_i
- args
[1].to_i
)
695 else if pname
== "*" then
696 return v
.int_instance
(args
[0].to_i
* args
[1].to_i
)
697 else if pname
== "%" then
698 return v
.int_instance
(args
[0].to_i
% args
[1].to_i
)
699 else if pname
== "/" then
700 return v
.int_instance
(args
[0].to_i
/ args
[1].to_i
)
701 else if pname
== "<" then
702 return v
.bool_instance
(args
[0].to_i
< args
[1].to_i
)
703 else if pname
== ">" then
704 return v
.bool_instance
(args
[0].to_i
> args
[1].to_i
)
705 else if pname
== "<=" then
706 return v
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
707 else if pname
== ">=" then
708 return v
.bool_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
== "ascii" then
712 return v
.char_instance
(args
[0].to_i
.ascii
)
713 else if pname
== "to_f" then
714 return v
.float_instance
(args
[0].to_i
.to_f
)
715 else if pname
== "lshift" then
716 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
717 else if pname
== "rshift" then
718 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
720 else if cname
== "Char" then
721 var recv
= args
[0].val
.as(Char)
722 if pname
== "ascii" then
723 return v
.int_instance
(recv
.ascii
)
724 else if pname
== "succ" then
725 return v
.char_instance
(recv
.succ
)
726 else if pname
== "prec" then
727 return v
.char_instance
(recv
.prec
)
728 else if pname
== "<" then
729 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
730 else if pname
== ">" then
731 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
732 else if pname
== "<=" then
733 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
734 else if pname
== ">=" then
735 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
736 else if pname
== "<=>" then
737 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
739 else if cname
== "Float" then
740 var recv
= args
[0].to_f
741 if pname
== "unary -" then
742 return v
.float_instance
(-recv
)
743 else if pname
== "+" then
744 return v
.float_instance
(recv
+ args
[1].to_f
)
745 else if pname
== "-" then
746 return v
.float_instance
(recv
- args
[1].to_f
)
747 else if pname
== "*" then
748 return v
.float_instance
(recv
* args
[1].to_f
)
749 else if pname
== "/" then
750 return v
.float_instance
(recv
/ args
[1].to_f
)
751 else if pname
== "<" then
752 return v
.bool_instance
(recv
< args
[1].to_f
)
753 else if pname
== ">" then
754 return v
.bool_instance
(recv
> args
[1].to_f
)
755 else if pname
== "<=" then
756 return v
.bool_instance
(recv
<= args
[1].to_f
)
757 else if pname
== ">=" then
758 return v
.bool_instance
(recv
>= args
[1].to_f
)
759 else if pname
== "to_i" then
760 return v
.int_instance
(recv
.to_i
)
762 else if cname
== "NativeString" then
763 var recvval
= args
.first
.val
.as(Buffer)
764 if pname
== "[]" then
765 var arg1
= args
[1].to_i
766 if arg1
>= recvval
.length
or arg1
< 0 then
767 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
769 return v
.char_instance
(recvval
[arg1
])
770 else if pname
== "[]=" then
771 var arg1
= args
[1].to_i
772 if arg1
>= recvval
.length
or arg1
< 0 then
773 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
775 recvval
[arg1
] = args
[2].val
.as(Char)
777 else if pname
== "copy_to" then
778 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
779 var destval
= args
[1].val
.as(Buffer)
780 var lenval
= args
[2].to_i
781 var fromval
= args
[3].to_i
782 var toval
= args
[4].to_i
784 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
786 if fromval
+ lenval
>= recvval
.length
then
787 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
790 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
792 if toval
+ lenval
>= destval
.length
then
793 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
795 recvval
.copy
(fromval
, lenval
, destval
, toval
)
797 else if pname
== "atoi" then
798 return v
.int_instance
(recvval
.to_i
)
800 else if pname
== "calloc_string" then
801 return v
.native_string_instance
("!" * args
[1].to_i
)
802 else if cname
== "NativeArray" then
803 var recvval
= args
.first
.val
.as(Array[Instance])
804 if pname
== "[]" then
805 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
806 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
808 return recvval
[args
[1].to_i
]
809 else if pname
== "[]=" then
810 recvval
[args
[1].to_i
] = args
[2]
812 else if pname
== "copy_to" then
813 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
816 else if pname
== "calloc_array" then
817 var recvtype
= args
.first
.mtype
.as(MClassType)
819 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
820 mtype
= mtype
.arguments
.first
821 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
822 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
823 else if pname
== "native_argc" then
824 return v
.int_instance
(v
.arguments
.length
)
825 else if pname
== "native_argv" then
826 var txt
= v
.arguments
[args
[1].to_i
]
827 return v
.native_string_instance
(txt
)
829 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
834 redef class AbstractArray[E
]
835 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
837 self.copy_to
(start
, len
, dest
, new_start
)
841 redef class AExternInitPropdef
842 redef fun call
(v
, mpropdef
, args
)
844 var pname
= mpropdef
.mproperty
.name
845 var cname
= mpropdef
.mclassdef
.mclass
.name
846 if pname
== "native_stdout" then
847 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdout
)
848 else if pname
== "native_stdin" then
849 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stdin
)
850 else if pname
== "native_stderr" then
851 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, stderr
)
852 else if pname
== "io_open_read" then
853 var a1
= args
[1].val
.as(Buffer)
854 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
855 else if pname
== "io_open_write" then
856 var a1
= args
[1].val
.as(Buffer)
857 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
859 fatal
(v
, "NOT YET IMPLEMENTED extern init {mpropdef}")
864 redef class AExternMethPropdef
866 redef fun call
(v
, mpropdef
, args
)
868 var pname
= mpropdef
.mproperty
.name
869 var cname
= mpropdef
.mclassdef
.mclass
.name
870 if cname
== "Int" then
871 var recvval
= args
.first
.val
.as(Int)
872 if pname
== "rand" then
873 var res
= recvval
.rand
874 return v
.int_instance
(res
)
875 else if pname
== "native_int_to_s" then
876 return v
.native_string_instance
(recvval
.to_s
)
878 else if cname
== "NativeFile" then
879 var recvval
= args
.first
.val
880 if pname
== "io_write" then
881 var a1
= args
[1].val
.as(Buffer)
882 recvval
.as(OStream).write
(a1
.substring
(0, args
[2].to_i
))
884 else if pname
== "io_read" then
885 var str
= recvval
.as(IStream).read
(args
[2].to_i
)
886 var a1
= args
[1].val
.as(Buffer)
887 new Buffer.from
(str
).copy
(0, str
.length
, a1
, 0)
888 return v
.int_instance
(str
.length
)
889 else if pname
== "io_close" then
890 recvval
.as(IOS).close
891 return v
.int_instance
(0)
893 else if cname
== "NativeString" then
894 var recvval
= args
.first
.val
.as(Buffer)
895 if pname
== "file_exists" then
896 return v
.bool_instance
(recvval
.to_s
.file_exists
)
897 else if pname
== "file_mkdir" then
900 else if pname
== "file_chdir" then
903 else if pname
== "get_environ" then
904 var txt
= recvval
.to_s
.environ
905 return v
.native_string_instance
(txt
)
906 else if pname
== "system" then
907 var res
= sys
.system
(recvval
.to_s
)
908 return v
.int_instance
(res
)
909 else if pname
== "atof" then
910 return v
.float_instance
(recvval
.to_f
)
912 else if cname
== "Int" then
913 if pname
== "rand" then
914 return v
.int_instance
(args
[0].to_i
.rand
)
916 else if cname
== "Float" then
917 if pname
== "cos" then
918 return v
.float_instance
(args
[0].to_f
.cos
)
919 else if pname
== "sin" then
920 return v
.float_instance
(args
[0].to_f
.sin
)
921 else if pname
== "tan" then
922 return v
.float_instance
(args
[0].to_f
.tan
)
923 else if pname
== "acos" then
924 return v
.float_instance
(args
[0].to_f
.acos
)
925 else if pname
== "asin" then
926 return v
.float_instance
(args
[0].to_f
.asin
)
927 else if pname
== "atan" then
928 return v
.float_instance
(args
[0].to_f
.atan
)
929 else if pname
== "sqrt" then
930 return v
.float_instance
(args
[0].to_f
.sqrt
)
931 else if pname
== "exp" then
932 return v
.float_instance
(args
[0].to_f
.exp
)
933 else if pname
== "log" then
934 return v
.float_instance
(args
[0].to_f
.log
)
935 else if pname
== "pow" then
936 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
937 else if pname
== "rand" then
938 return v
.float_instance
(args
[0].to_f
.rand
)
940 else if pname
== "native_argc" then
941 return v
.int_instance
(v
.arguments
.length
)
942 else if pname
== "native_argv" then
943 var txt
= v
.arguments
[args
[1].to_i
]
944 return v
.native_string_instance
(txt
)
945 else if pname
== "get_time" then
946 return v
.int_instance
(get_time
)
947 else if pname
== "srand_from" then
948 srand_from
(args
[1].to_i
)
950 else if pname
== "atan2" then
951 return v
.float_instance
(atan2
(args
[1].to_f
, args
[2].to_f
))
952 else if pname
== "pi" then
953 return v
.float_instance
(pi
)
954 else if pname
== "lexer_goto" then
955 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
956 else if pname
== "lexer_accept" then
957 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
958 else if pname
== "parser_goto" then
959 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
960 else if pname
== "parser_action" then
961 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
962 else if pname
== "file_getcwd" then
963 return v
.native_string_instance
(getcwd
)
965 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
970 redef class AAttrPropdef
971 redef fun call
(v
, mpropdef
, args
)
973 var recv
= args
.first
974 assert recv
isa MutableInstance
975 var attr
= self.mpropdef
.mproperty
976 if args
.length
== 1 then
977 return v
.read_attribute
(attr
, recv
)
979 assert args
.length
== 2
980 recv
.attributes
[attr
] = args
[1]
985 # Evaluate and set the default value of the attribute in `recv`
986 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
988 assert recv
isa MutableInstance
989 var nexpr
= self.n_expr
990 if nexpr
!= null then
991 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
993 var val
= v
.expr
(nexpr
)
996 assert not v
.is_escaping
997 recv
.attributes
[self.mpropdef
.mproperty
] = val
1000 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1001 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1002 if mtype
isa MNullableType then
1003 recv
.attributes
[self.mpropdef
.mproperty
] = v
.null_instance
1008 redef class ADeferredMethPropdef
1009 redef fun call
(v
, mpropdef
, args
)
1011 fatal
(v
, "Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
1016 redef class AClassdef
1017 # Execute an implicit `mpropdef` associated with the current node.
1018 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1020 var super_inits
= self.super_inits
1021 if super_inits
!= null then
1022 assert args
.length
== 1
1023 for su
in super_inits
do
1028 var recv
= args
.first
1029 assert recv
isa MutableInstance
1031 # Collect undefined attributes
1032 for npropdef
in self.n_propdefs
do
1033 if npropdef
isa AAttrPropdef and npropdef
.n_expr
== null then
1034 recv
.attributes
[npropdef
.mpropdef
.mproperty
] = args
[i
]
1043 # Evaluate the node as a possible expression.
1044 # Return a possible value
1045 # NOTE: Do not call this method directly, but use `v.expr`
1046 # This method is here to be implemented by subclasses.
1047 private fun expr
(v
: NaiveInterpreter): nullable Instance
1049 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1053 # Evaluate the node as a statement.
1054 # NOTE: Do not call this method directly, but use `v.stmt`
1055 # This method is here to be implemented by subclasses (no need to return something).
1056 private fun stmt
(v
: NaiveInterpreter)
1063 redef class ABlockExpr
1066 var last
= self.n_expr
.last
1067 for e
in self.n_expr
do
1068 if e
== last
then break
1070 if v
.is_escaping
then return null
1077 for e
in self.n_expr
do
1079 if v
.is_escaping
then return
1084 redef class AVardeclExpr
1087 var ne
= self.n_expr
1090 if i
== null then return
1091 v
.frame
.map
[self.variable
.as(not null)] = i
1096 redef class AVarExpr
1099 return v
.frame
.map
[self.variable
.as(not null)]
1103 redef class AVarAssignExpr
1106 var i
= v
.expr
(self.n_value
)
1107 if i
== null then return null
1108 v
.frame
.map
[self.variable
.as(not null)] = i
1113 redef class AVarReassignExpr
1116 var vari
= v
.frame
.map
[self.variable
.as(not null)]
1117 var value
= v
.expr
(self.n_value
)
1118 if value
== null then return
1119 var res
= v
.send
(reassign_property
.mproperty
, [vari
, value
])
1121 v
.frame
.map
[self.variable
.as(not null)] = res
1125 redef class ASelfExpr
1128 return v
.frame
.arguments
.first
1132 redef class AContinueExpr
1135 var ne
= self.n_expr
1138 if i
== null then return
1141 v
.continuemark
= self.escapemark
1145 redef class ABreakExpr
1148 var ne
= self.n_expr
1151 if i
== null then return
1154 v
.breakmark
= self.escapemark
1158 redef class AReturnExpr
1161 var ne
= self.n_expr
1164 if i
== null then return
1167 v
.returnmark
= v
.frame
1171 redef class AAbortExpr
1182 var cond
= v
.expr
(self.n_expr
)
1183 if cond
== null then return null
1184 if cond
.is_true
then
1185 return v
.expr
(self.n_then
.as(not null))
1187 return v
.expr
(self.n_else
.as(not null))
1193 var cond
= v
.expr
(self.n_expr
)
1194 if cond
== null then return
1195 if cond
.is_true
then
1203 redef class AIfexprExpr
1206 var cond
= v
.expr
(self.n_expr
)
1207 if cond
== null then return null
1208 if cond
.is_true
then
1209 return v
.expr
(self.n_then
)
1211 return v
.expr
(self.n_else
)
1219 v
.stmt
(self.n_block
)
1220 v
.is_break
(self.escapemark
) # Clear the break (if any)
1224 redef class AWhileExpr
1228 var cond
= v
.expr
(self.n_expr
)
1229 if cond
== null then return
1230 if not cond
.is_true
then return
1231 v
.stmt
(self.n_block
)
1232 if v
.is_break
(self.escapemark
) then return
1233 v
.is_continue
(self.escapemark
) # Clear the break
1234 if v
.is_escaping
then return
1239 redef class ALoopExpr
1243 v
.stmt
(self.n_block
)
1244 if v
.is_break
(self.escapemark
) then return
1245 v
.is_continue
(self.escapemark
) # Clear the break
1246 if v
.is_escaping
then return
1251 redef class AForExpr
1254 var col
= v
.expr
(self.n_expr
)
1255 if col
== null then return
1256 #self.debug("col {col}")
1257 var iter
= v
.send
(v
.force_get_primitive_method
("iterator", col
.mtype
), [col
]).as(not null)
1258 #self.debug("iter {iter}")
1260 var isok
= v
.send
(v
.force_get_primitive_method
("is_ok", iter
.mtype
), [iter
]).as(not null)
1261 if not isok
.is_true
then return
1262 if self.variables
.length
== 1 then
1263 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1264 #self.debug("item {item}")
1265 v
.frame
.map
[self.variables
.first
] = item
1266 else if self.variables
.length
== 2 then
1267 var key
= v
.send
(v
.force_get_primitive_method
("key", iter
.mtype
), [iter
]).as(not null)
1268 v
.frame
.map
[self.variables
[0]] = key
1269 var item
= v
.send
(v
.force_get_primitive_method
("item", iter
.mtype
), [iter
]).as(not null)
1270 v
.frame
.map
[self.variables
[1]] = item
1274 v
.stmt
(self.n_block
)
1275 if v
.is_break
(self.escapemark
) then return
1276 v
.is_continue
(self.escapemark
) # Clear the break
1277 if v
.is_escaping
then return
1278 v
.send
(v
.force_get_primitive_method
("next", iter
.mtype
), [iter
])
1283 redef class AAssertExpr
1286 var cond
= v
.expr
(self.n_expr
)
1287 if cond
== null then return
1288 if not cond
.is_true
then
1290 if v
.is_escaping
then return
1293 fatal
(v
, "Assert '{nid.text}' failed")
1295 fatal
(v
, "Assert failed")
1305 var cond
= v
.expr
(self.n_expr
)
1306 if cond
== null then return null
1307 if cond
.is_true
then return cond
1308 return v
.expr
(self.n_expr2
)
1312 redef class AImpliesExpr
1315 var cond
= v
.expr
(self.n_expr
)
1316 if cond
== null then return null
1317 if not cond
.is_true
then return v
.true_instance
1318 return v
.expr
(self.n_expr2
)
1322 redef class AAndExpr
1325 var cond
= v
.expr
(self.n_expr
)
1326 if cond
== null then return null
1327 if not cond
.is_true
then return cond
1328 return v
.expr
(self.n_expr2
)
1332 redef class ANotExpr
1335 var cond
= v
.expr
(self.n_expr
)
1336 if cond
== null then return null
1337 return v
.bool_instance
(not cond
.is_true
)
1341 redef class AOrElseExpr
1344 var i
= v
.expr
(self.n_expr
)
1345 if i
== null then return null
1346 if i
!= v
.null_instance
then return i
1347 return v
.expr
(self.n_expr2
)
1351 redef class AIntExpr
1354 return v
.int_instance
(self.value
.as(not null))
1358 redef class AFloatExpr
1361 return v
.float_instance
(self.value
.as(not null))
1365 redef class ACharExpr
1368 return v
.char_instance
(self.value
.as(not null))
1372 redef class AArrayExpr
1375 var val
= new Array[Instance]
1376 for nexpr
in self.n_exprs
.n_exprs
do
1377 var i
= v
.expr
(nexpr
)
1378 if i
== null then return null
1381 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1382 var elttype
= mtype
.arguments
.first
1383 return v
.array_instance
(val
, elttype
)
1387 redef class AStringFormExpr
1390 var txt
= self.value
.as(not null)
1391 var nat
= v
.native_string_instance
(txt
)
1392 var res
= v
.send
(v
.force_get_primitive_method
("to_s", nat
.mtype
), [nat
]).as(not null)
1397 redef class ASuperstringExpr
1400 var array
= new Array[Instance]
1401 for nexpr
in n_exprs
do
1402 var i
= v
.expr
(nexpr
)
1403 if i
== null then return null
1406 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1407 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1413 redef class ACrangeExpr
1416 var e1
= v
.expr
(self.n_expr
)
1417 if e1
== null then return null
1418 var e2
= v
.expr
(self.n_expr2
)
1419 if e2
== null then return null
1420 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1421 var res
= new MutableInstance(mtype
)
1422 v
.init_instance
(res
)
1423 v
.send
(v
.force_get_primitive_method
("init", mtype
), [res
, e1
, e2
])
1424 v
.check_init_instance
(res
)
1429 redef class AOrangeExpr
1432 var e1
= v
.expr
(self.n_expr
)
1433 if e1
== null then return null
1434 var e2
= v
.expr
(self.n_expr2
)
1435 if e2
== null then return null
1436 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1437 var res
= new MutableInstance(mtype
)
1438 v
.init_instance
(res
)
1439 v
.send
(v
.force_get_primitive_method
("without_last", mtype
), [res
, e1
, e2
])
1440 v
.check_init_instance
(res
)
1445 redef class ATrueExpr
1448 return v
.bool_instance
(true)
1452 redef class AFalseExpr
1455 return v
.bool_instance
(false)
1459 redef class ANullExpr
1462 return v
.null_instance
1466 redef class AIsaExpr
1469 var i
= v
.expr
(self.n_expr
)
1470 if i
== null then return null
1471 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1472 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1476 redef class AAsCastExpr
1479 var i
= v
.expr
(self.n_expr
)
1480 if i
== null then return null
1481 var mtype
= self.mtype
.as(not null)
1482 var amtype
= v
.unanchor_type
(mtype
)
1483 if not v
.is_subtype
(i
.mtype
, amtype
) then
1484 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
1490 redef class AAsNotnullExpr
1493 var i
= v
.expr
(self.n_expr
)
1494 if i
== null then return null
1495 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1496 if i
.mtype
isa MNullType then
1497 fatal
(v
, "Cast failed")
1503 redef class AParExpr
1506 return v
.expr
(self.n_expr
)
1510 redef class AOnceExpr
1513 if v
.onces
.has_key
(self) then
1514 return v
.onces
[self]
1516 var res
= v
.expr
(self.n_expr
)
1517 if res
== null then return null
1524 redef class ASendExpr
1527 var recv
= v
.expr
(self.n_expr
)
1528 if recv
== null then return null
1530 for a
in self.raw_arguments
.as(not null) do
1532 if i
== null then return null
1535 var mproperty
= self.mproperty
.as(not null)
1537 var res
= v
.send
(mproperty
, args
)
1542 redef class ASendReassignFormExpr
1545 var recv
= v
.expr
(self.n_expr
)
1546 if recv
== null then return
1548 for a
in self.raw_arguments
.as(not null) do
1550 if i
== null then return
1553 var value
= v
.expr
(self.n_value
)
1554 if value
== null then return
1556 var mproperty
= self.mproperty
.as(not null)
1557 var read
= v
.send
(mproperty
, args
)
1560 var write
= v
.send
(self.reassign_property
.mproperty
, [read
, value
])
1561 assert write
!= null
1565 v
.send
(self.write_mproperty
.as(not null), args
)
1569 redef class ASuperExpr
1572 var recv
= v
.frame
.arguments
.first
1574 for a
in self.n_args
.n_exprs
do
1576 if i
== null then return null
1579 if args
.length
== 1 then
1580 args
= v
.frame
.arguments
1583 var mproperty
= self.mproperty
1584 if mproperty
!= null then
1585 if mproperty
.intro
.msignature
.arity
== 0 then
1589 var res
= v
.send
(mproperty
, args
)
1593 # stantard call-next-method
1594 var mpropdef
= v
.frame
.mpropdef
1595 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1596 assert mpropdef
isa MMethodDef
1597 var res
= v
.call_without_varargs
(mpropdef
, args
)
1602 redef class ANewExpr
1605 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1606 var recv
: Instance = new MutableInstance(mtype
)
1607 v
.init_instance
(recv
)
1609 for a
in self.n_args
.n_exprs
do
1611 if i
== null then return null
1614 var mproperty
= self.mproperty
.as(not null)
1615 var res2
= v
.send
(mproperty
, args
)
1616 if res2
!= null then
1617 #self.debug("got {res2} from {mproperty}. drop {recv}")
1620 v
.check_init_instance
(recv
)
1625 redef class AAttrExpr
1628 var recv
= v
.expr
(self.n_expr
)
1629 if recv
== null then return null
1630 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1631 var mproperty
= self.mproperty
.as(not null)
1632 return v
.read_attribute
(mproperty
, recv
)
1636 redef class AAttrAssignExpr
1639 var recv
= v
.expr
(self.n_expr
)
1640 if recv
== null then return
1641 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1642 var i
= v
.expr
(self.n_value
)
1643 if i
== null then return
1644 var mproperty
= self.mproperty
.as(not null)
1645 assert recv
isa MutableInstance
1646 recv
.attributes
[mproperty
] = i
1650 redef class AAttrReassignExpr
1653 var recv
= v
.expr
(self.n_expr
)
1654 if recv
== null then return
1655 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1656 var value
= v
.expr
(self.n_value
)
1657 if value
== null then return
1658 var mproperty
= self.mproperty
.as(not null)
1659 var attr
= v
.read_attribute
(mproperty
, recv
)
1660 var res
= v
.send
(reassign_property
.mproperty
, [attr
, value
])
1662 assert recv
isa MutableInstance
1663 recv
.attributes
[mproperty
] = res
1667 redef class AIssetAttrExpr
1670 var recv
= v
.expr
(self.n_expr
)
1671 if recv
== null then return null
1672 if recv
.mtype
isa MNullType then fatal
(v
, "Reciever is null")
1673 var mproperty
= self.mproperty
.as(not null)
1674 assert recv
isa MutableInstance
1675 return v
.bool_instance
(recv
.attributes
.has_key
(mproperty
))
1679 redef class ADebugTypeExpr