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
26 redef class ToolContext
27 # --discover-call-trace
28 var opt_discover_call_trace
: OptionBool = new OptionBool("Trace calls of the first invocation of a method", "--discover-call-trace")
33 self.option_context
.add_option
(self.opt_discover_call_trace
)
37 redef class ModelBuilder
38 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
39 # `arguments` are the command-line arguments in order
41 # 1. the AST is fully loaded.
42 # 2. the model is fully built.
43 # 3. the instructions are fully analysed.
44 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
47 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
49 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
50 init_naive_interpreter
(interpreter
, mainmodule
)
53 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
56 private fun init_naive_interpreter
(interpreter
: NaiveInterpreter, mainmodule
: MModule) do
57 var sys_type
= mainmodule
.sys_type
58 if sys_type
== null then return # no class Sys
59 var mainobj
= new MutableInstance(sys_type
)
60 interpreter
.mainobj
= mainobj
61 interpreter
.init_instance
(mainobj
)
62 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
63 if initprop
!= null then
64 interpreter
.send
(initprop
, [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
)])
249 # Return a new native string initialized with `txt`
250 fun native_string_instance
(txt
: String): Instance
252 var val
= new FlatBuffer.from
(txt
)
254 var ic
= self.mainmodule
.get_primitive_class
("NativeString")
255 return new PrimitiveInstance[Buffer](ic
.mclass_type
, val
)
258 # The current frame used to store local variables of the current method executed
259 fun frame
: Frame do return frames
.first
261 # The stack of all frames. The first one is the current one.
262 var frames
: List[Frame] = new List[Frame]
264 # Return a stack stace. One line per function
265 fun stack_trace
: String
267 var b
= new FlatBuffer
268 b
.append
(",---- Stack trace -- - - -\n")
270 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
272 b
.append
("`------------------- - - -")
276 # Exit the program with a message
277 fun fatal
(message
: String)
279 if frames
.is_empty
then
282 self.frame
.current_node
.fatal
(self, message
)
287 # Debug on the current node
288 fun debug
(message
: String)
290 if frames
.is_empty
then
293 self.frame
.current_node
.debug
(message
)
297 # Store known method, used to trace methods as thez are reached
298 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
300 # Common code for calls to injected methods and normal methods
301 fun call_commons
(mpropdef
: MMethodDef, args
: Array[Instance]): Array[Instance]
303 var vararg_rank
= mpropdef
.msignature
.vararg_rank
304 if vararg_rank
>= 0 then
305 assert args
.length
>= mpropdef
.msignature
.arity
+ 1 # because of self
307 args
= new Array[Instance]
309 args
.add
(rawargs
.first
) # recv
311 for i
in [0..vararg_rank
[ do
312 args
.add
(rawargs
[i
+1])
315 var vararg_lastrank
= vararg_rank
+ rawargs
.length-1-mpropdef
.msignature
.arity
316 var vararg
= new Array[Instance]
317 for i
in [vararg_rank
..vararg_lastrank
] do
318 vararg
.add
(rawargs
[i
+1])
320 # FIXME: its it to late to determine the vararg type, this should have been done during a previous analysis
321 var elttype
= mpropdef
.msignature
.mparameters
[vararg_rank
].mtype
.anchor_to
(self.mainmodule
, args
.first
.mtype
.as(MClassType))
322 args
.add
(self.array_instance
(vararg
, elttype
))
324 for i
in [vararg_lastrank
+1..rawargs
.length-1
[ do
325 args
.add
(rawargs
[i
+1])
331 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
332 # Return a falue if `mpropdef` is a function, or null if it is a procedure.
333 # The call is direct/static. There is no message-seding/late-binding.
334 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
336 args
= call_commons
(mpropdef
, args
)
337 return call_without_varargs
(mpropdef
, args
)
340 # Common code to call and this function
342 # Call only executes the variadic part, this avoids
343 # double encapsulation of variadic parameters into an Array
344 fun call_without_varargs
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
346 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
347 self.discover_call_trace
.add mpropdef
348 self.debug
("Discovered {mpropdef}")
350 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
352 # Look for the AST node that implements the property
353 var mproperty
= mpropdef
.mproperty
354 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
355 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
356 self.parameter_check
(npropdef
, mpropdef
, args
)
357 return npropdef
.call
(self, mpropdef
, args
)
358 else if mproperty
.name
== "init" then
359 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
360 self.parameter_check
(nclassdef
, mpropdef
, args
)
361 return nclassdef
.call
(self, mpropdef
, args
)
363 fatal
("Fatal Error: method {mpropdef} not found in the AST")
368 # Generate type checks in the C code to check covariant parameters
369 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
371 var msignature
= mpropdef
.msignature
372 for i
in [0..msignature
.arity
[ do
373 # skip test for vararg since the array is instantiated with the correct polymorphic type
374 if msignature
.vararg_rank
== i
then continue
376 # skip if the cast is not required
377 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
378 if not origmtype
.need_anchor
then continue
380 # get the parameter type
381 var mtype
= msignature
.mparameters
[i
].mtype
382 var anchor
= args
.first
.mtype
.as(MClassType)
383 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
384 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
385 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
390 # Common code for runtime injected calls and normal calls
391 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
393 if mtype
isa MNullType then
394 if mproperty
.name
== "==" then
395 return self.bool_instance
(args
[0] == args
[1])
396 else if mproperty
.name
== "!=" then
397 return self.bool_instance
(args
[0] != args
[1])
399 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
400 fatal
("Receiver is null")
405 # Execute a full `callsite` for given `args`
406 # Use this method, instead of `send` to execute and control the aditionnal behavior of the call-sites
407 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
409 return send
(callsite
.mproperty
, arguments
)
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 var ret
= send_commons
(mproperty
, args
, mtype
)
420 if ret
!= null then return ret
421 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
422 return self.call
(propdef
, args
)
425 # Read the attribute `mproperty` of an instance `recv` and return its value.
426 # If the attribute in not yet initialized, then aborts with an error message.
427 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
429 assert recv
isa MutableInstance
430 if not recv
.attributes
.has_key
(mproperty
) then
431 fatal
("Uninitialized attribute {mproperty.name}")
434 return recv
.attributes
[mproperty
]
437 # Replace in `recv` the value of the attribute `mproperty` by `value`
438 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
440 assert recv
isa MutableInstance
441 recv
.attributes
[mproperty
] = value
444 # Collect attributes of a type in the order of their init
445 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
447 var cache
= self.collect_attr_propdef_cache
448 if cache
.has_key
(mtype
) then return cache
[mtype
]
450 var res
= new Array[AAttrPropdef]
451 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
452 self.mainmodule
.linearize_mclassdefs
(cds
)
454 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
455 for npropdef
in n
.n_propdefs
do
456 if npropdef
isa AAttrPropdef then
466 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
468 # Fill the initial values of the newly created instance `recv`.
469 # `recv.mtype` is used to know what must be filled.
470 fun init_instance
(recv
: Instance)
472 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
473 npropdef
.init_expr
(self, recv
)
477 # This function determine the correct type according the reciever of the current definition (self).
478 fun unanchor_type
(mtype
: MType): MType
480 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
484 # An instance represents a value of the executed program.
485 abstract class Instance
486 # The dynamic type of the instance
487 # ASSERT: not self.mtype.is_anchored
490 # return true if the instance is the true value.
491 # return false if the instance is the true value.
493 fun is_true
: Bool do abort
495 # Return true if `self` IS `o` (using the Nit semantic of is)
496 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
498 # Human readable object identity "Type#number"
499 redef fun to_s
do return "{mtype}"
501 # Return the integer value if the instance is an integer.
503 fun to_i
: Int do abort
505 # Return the integer value if the instance is a float.
507 fun to_f
: Float do abort
509 # The real value encapsulated if the instance is primitive.
511 fun val
: Object do abort
514 # A instance with attribute (standards objects)
515 class MutableInstance
518 # The values of the attributes
519 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
522 # Special instance to handle primitives values (int, bool, etc.)
523 # The trick it just to encapsulate the <<real>> value
524 class PrimitiveInstance[E
: Object]
527 # The real value encapsulated
530 init(mtype
: MType, val
: E
)
538 if val
== true then return true
539 if val
== false then return false
545 if not o
isa PrimitiveInstance[Object] then return false
546 return self.val
== o
.val
551 if not o
isa PrimitiveInstance[Object] then return false
552 return self.val
.is_same_instance
(o
.val
)
555 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
557 redef fun to_i
do return val
.as(Int)
559 redef fun to_f
do return val
.as(Float)
562 # Information about local variables in a running method
564 # The current visited node
565 # The node is stored by frame to keep a stack trace
566 var current_node
: ANode
567 # The executed property.
568 # A Method in case of a call, an attribute in case of a default initialization.
569 var mpropdef
: MPropDef
570 # Arguments of the method (the first is te receiver
571 var arguments
: Array[Instance]
572 # Mapping betwen a variable an the current value
573 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
577 # Aborts the program with a message
578 # `v` is used to know if a colored message is displayed or not
579 private fun fatal
(v
: NaiveInterpreter, message
: String)
581 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
582 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
584 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
585 sys
.stderr
.write
(v
.stack_trace
)
586 sys
.stderr
.write
("\n")
593 # Execute a `mpropdef` associated with the current node.
594 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
596 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
601 redef class AMethPropdef
604 redef fun call
(v
, mpropdef
, args
)
606 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
607 var res
= call_commons
(v
, mpropdef
, args
, f
)
609 if v
.returnmark
== f
then
618 private fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
620 for i
in [0..mpropdef
.msignature
.arity
[ do
621 var variable
= self.n_signature
.n_params
[i
].variable
622 assert variable
!= null
623 f
.map
[variable
] = arguments
[i
+1]
628 if mpropdef
.is_abstract
then
629 v
.fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{arguments.first.mtype}`")
633 # Call the implicit super-init
634 var auto_super_inits
= self.auto_super_inits
635 if auto_super_inits
!= null then
636 var args
= [arguments
.first
]
637 for auto_super_init
in auto_super_inits
do
639 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
640 args
.add
(arguments
[i
])
642 v
.callsite
(auto_super_init
, args
)
646 if n_block
!= null then
650 return intern_call
(v
, mpropdef
, arguments
)
654 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
656 var pname
= mpropdef
.mproperty
.name
657 var cname
= mpropdef
.mclassdef
.mclass
.name
658 if pname
== "output" then
659 var recv
= args
.first
662 else if pname
== "object_id" then
663 var recv
= args
.first
664 if recv
isa PrimitiveInstance[Object] then
665 return v
.int_instance
(recv
.val
.object_id
)
667 return v
.int_instance
(recv
.object_id
)
669 else if pname
== "output_class_name" then
670 var recv
= args
.first
673 else if pname
== "native_class_name" then
674 var recv
= args
.first
675 var txt
= recv
.mtype
.to_s
676 return v
.native_string_instance
(txt
)
677 else if pname
== "==" then
678 # == is correclt redefined for instances
679 return v
.bool_instance
(args
[0] == args
[1])
680 else if pname
== "!=" then
681 return v
.bool_instance
(args
[0] != args
[1])
682 else if pname
== "is_same_type" then
683 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
684 else if pname
== "is_same_instance" then
685 return v
.bool_instance
(args
[1] != null and args
[0].eq_is
(args
[1]))
686 else if pname
== "exit" then
689 else if pname
== "sys" then
691 else if cname
== "Int" then
692 var recvval
= args
[0].to_i
693 if pname
== "unary -" then
694 return v
.int_instance
(-args
[0].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
.int_instance
(args
[0].to_i
% args
[1].to_i
)
703 else if pname
== "/" then
704 return v
.int_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
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
711 else if pname
== ">=" then
712 return v
.bool_instance
(args
[0].to_i
>= args
[1].to_i
)
713 else if pname
== "<=>" then
714 return v
.int_instance
(args
[0].to_i
<=> args
[1].to_i
)
715 else if pname
== "ascii" then
716 return v
.char_instance
(args
[0].to_i
.ascii
)
717 else if pname
== "to_f" then
718 return v
.float_instance
(args
[0].to_i
.to_f
)
719 else if pname
== "lshift" then
720 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
721 else if pname
== "rshift" then
722 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
723 else if pname
== "rand" then
724 var res
= recvval
.rand
725 return v
.int_instance
(res
)
726 else if pname
== "bin_and" then
727 return v
.int_instance
(args
[0].to_i
.bin_and
(args
[1].to_i
))
728 else if pname
== "bin_or" then
729 return v
.int_instance
(args
[0].to_i
.bin_or
(args
[1].to_i
))
730 else if pname
== "bin_xor" then
731 return v
.int_instance
(args
[0].to_i
.bin_xor
(args
[1].to_i
))
732 else if pname
== "native_int_to_s" then
733 return v
.native_string_instance
(recvval
.to_s
)
734 else if pname
== "strerror_ext" then
735 return v
.native_string_instance
(recvval
.strerror
)
737 else if cname
== "Char" then
738 var recv
= args
[0].val
.as(Char)
739 if pname
== "ascii" then
740 return v
.int_instance
(recv
.ascii
)
741 else if pname
== "successor" then
742 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
743 else if pname
== "predecessor" then
744 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
745 else if pname
== "<" then
746 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
747 else if pname
== ">" then
748 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
749 else if pname
== "<=" then
750 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
751 else if pname
== ">=" then
752 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
753 else if pname
== "<=>" then
754 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
756 else if cname
== "Float" then
757 var recv
= args
[0].to_f
758 if pname
== "unary -" then
759 return v
.float_instance
(-recv
)
760 else if pname
== "+" then
761 return v
.float_instance
(recv
+ args
[1].to_f
)
762 else if pname
== "-" then
763 return v
.float_instance
(recv
- args
[1].to_f
)
764 else if pname
== "*" then
765 return v
.float_instance
(recv
* args
[1].to_f
)
766 else if pname
== "/" then
767 return v
.float_instance
(recv
/ args
[1].to_f
)
768 else if pname
== "<" then
769 return v
.bool_instance
(recv
< args
[1].to_f
)
770 else if pname
== ">" then
771 return v
.bool_instance
(recv
> args
[1].to_f
)
772 else if pname
== "<=" then
773 return v
.bool_instance
(recv
<= args
[1].to_f
)
774 else if pname
== ">=" then
775 return v
.bool_instance
(recv
>= args
[1].to_f
)
776 else if pname
== "to_i" then
777 return v
.int_instance
(recv
.to_i
)
778 else if pname
== "cos" then
779 return v
.float_instance
(args
[0].to_f
.cos
)
780 else if pname
== "sin" then
781 return v
.float_instance
(args
[0].to_f
.sin
)
782 else if pname
== "tan" then
783 return v
.float_instance
(args
[0].to_f
.tan
)
784 else if pname
== "acos" then
785 return v
.float_instance
(args
[0].to_f
.acos
)
786 else if pname
== "asin" then
787 return v
.float_instance
(args
[0].to_f
.asin
)
788 else if pname
== "atan" then
789 return v
.float_instance
(args
[0].to_f
.atan
)
790 else if pname
== "sqrt" then
791 return v
.float_instance
(args
[0].to_f
.sqrt
)
792 else if pname
== "exp" then
793 return v
.float_instance
(args
[0].to_f
.exp
)
794 else if pname
== "log" then
795 return v
.float_instance
(args
[0].to_f
.log
)
796 else if pname
== "pow" then
797 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
798 else if pname
== "rand" then
799 return v
.float_instance
(args
[0].to_f
.rand
)
800 else if pname
== "abs" then
801 return v
.float_instance
(args
[0].to_f
.abs
)
802 else if pname
== "hypot_with" then
803 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
804 else if pname
== "is_nan" then
805 return v
.bool_instance
(args
[0].to_f
.is_nan
)
806 else if pname
== "is_inf_extern" then
807 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
809 else if cname
== "NativeString" then
810 if pname
== "init" then
811 return v
.native_string_instance
("!" * args
[1].to_i
)
813 var recvval
= args
.first
.val
.as(Buffer)
814 if pname
== "[]" then
815 var arg1
= args
[1].to_i
816 if arg1
>= recvval
.length
or arg1
< 0 then
817 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
819 return v
.char_instance
(recvval
.chars
[arg1
])
820 else if pname
== "[]=" then
821 var arg1
= args
[1].to_i
822 if arg1
>= recvval
.length
or arg1
< 0 then
823 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
825 recvval
.chars
[arg1
] = args
[2].val
.as(Char)
827 else if pname
== "copy_to" then
828 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
829 var destval
= args
[1].val
.as(FlatBuffer)
830 var lenval
= args
[2].to_i
831 var fromval
= args
[3].to_i
832 var toval
= args
[4].to_i
834 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
836 if fromval
+ lenval
>= recvval
.length
then
837 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
840 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
842 if toval
+ lenval
>= destval
.length
then
843 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
845 recvval
.as(FlatBuffer).copy
(fromval
, lenval
, destval
, toval
)
847 else if pname
== "atoi" then
848 return v
.int_instance
(recvval
.to_i
)
849 else if pname
== "file_exists" then
850 return v
.bool_instance
(recvval
.to_s
.file_exists
)
851 else if pname
== "file_mkdir" then
854 else if pname
== "file_chdir" then
857 else if pname
== "file_realpath" then
858 return v
.native_string_instance
(recvval
.to_s
.realpath
)
859 else if pname
== "get_environ" then
860 var txt
= recvval
.to_s
.environ
861 return v
.native_string_instance
(txt
)
862 else if pname
== "system" then
863 var res
= sys
.system
(recvval
.to_s
)
864 return v
.int_instance
(res
)
865 else if pname
== "atof" then
866 return v
.float_instance
(recvval
.to_f
)
868 else if pname
== "calloc_string" then
869 return v
.native_string_instance
("!" * args
[1].to_i
)
870 else if cname
== "NativeArray" then
871 if pname
== "init" then
872 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
873 return new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
875 var recvval
= args
.first
.val
.as(Array[Instance])
876 if pname
== "[]" then
877 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
878 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
880 return recvval
[args
[1].to_i
]
881 else if pname
== "[]=" then
882 recvval
[args
[1].to_i
] = args
[2]
884 else if pname
== "length" then
885 return v
.int_instance
(recvval
.length
)
886 else if pname
== "copy_to" then
887 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
890 else if cname
== "NativeFile" then
891 if pname
== "native_stdout" then
892 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdout
)
893 else if pname
== "native_stdin" then
894 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdin
)
895 else if pname
== "native_stderr" then
896 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stderr
)
897 else if pname
== "io_open_read" then
898 var a1
= args
[1].val
.as(Buffer)
899 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
900 else if pname
== "io_open_write" then
901 var a1
= args
[1].val
.as(Buffer)
902 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
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
).to_s
)
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 FlatBuffer.from
(str
).copy
(0, str
.length
, a1
.as(FlatBuffer), 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)
917 else if pname
== "address_is_null" then
918 return v
.false_instance
920 else if pname
== "calloc_array" then
921 var recvtype
= args
.first
.mtype
.as(MClassType)
923 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
924 mtype
= mtype
.arguments
.first
925 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
926 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
927 else if pname
== "native_argc" then
928 return v
.int_instance
(v
.arguments
.length
)
929 else if pname
== "native_argv" then
930 var txt
= v
.arguments
[args
[1].to_i
]
931 return v
.native_string_instance
(txt
)
932 else if pname
== "native_argc" then
933 return v
.int_instance
(v
.arguments
.length
)
934 else if pname
== "native_argv" then
935 var txt
= v
.arguments
[args
[1].to_i
]
936 return v
.native_string_instance
(txt
)
937 else if pname
== "get_time" then
938 return v
.int_instance
(get_time
)
939 else if pname
== "srand_from" then
940 srand_from
(args
[1].to_i
)
942 else if pname
== "atan2" then
943 return v
.float_instance
(atan2
(args
[1].to_f
, args
[2].to_f
))
944 else if pname
== "pi" then
945 return v
.float_instance
(pi
)
946 else if pname
== "lexer_goto" then
947 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
948 else if pname
== "lexer_accept" then
949 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
950 else if pname
== "parser_goto" then
951 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
952 else if pname
== "parser_action" then
953 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
954 else if pname
== "file_getcwd" then
955 return v
.native_string_instance
(getcwd
)
956 else if pname
== "errno" then
957 return v
.int_instance
(sys
.errno
)
958 else if pname
== "address_is_null" then
959 return v
.false_instance
961 if mpropdef
.is_intern
then
962 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
963 else if mpropdef
.is_extern
then
964 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
966 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
972 redef class AbstractArray[E
]
973 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
975 self.copy_to
(start
, len
, dest
, new_start
)
979 redef class AAttrPropdef
980 redef fun call
(v
, mpropdef
, args
)
982 var recv
= args
.first
983 assert recv
isa MutableInstance
984 var attr
= self.mpropdef
.mproperty
985 if mpropdef
== mreadpropdef
then
986 assert args
.length
== 1
987 return v
.read_attribute
(attr
, recv
)
988 else if mpropdef
== mwritepropdef
then
989 assert args
.length
== 2
990 v
.write_attribute
(attr
, recv
, args
[1])
997 # Evaluate and set the default value of the attribute in `recv`
998 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1000 assert recv
isa MutableInstance
1001 var nexpr
= self.n_expr
1002 if nexpr
!= null then
1003 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
1005 var val
= v
.expr
(nexpr
)
1008 assert not v
.is_escaping
1009 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1012 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1013 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1014 if mtype
isa MNullableType then
1015 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1020 redef class AClassdef
1021 # Execute an implicit `mpropdef` associated with the current node.
1022 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1024 var super_inits
= self.super_inits
1025 if super_inits
!= null then
1026 var args_of_super
= args
1027 if args
.length
> 1 then args_of_super
= [args
.first
]
1028 for su
in super_inits
do
1029 v
.send
(su
, args_of_super
)
1032 var recv
= args
.first
1033 assert recv
isa MutableInstance
1035 # Collect undefined attributes
1036 for npropdef
in self.n_propdefs
do
1037 if npropdef
isa AAttrPropdef and not npropdef
.noinit
and npropdef
.n_expr
== null then
1038 v
.write_attribute
(npropdef
.mpropdef
.mproperty
, recv
, args
[i
])
1047 # Evaluate the node as a possible expression.
1048 # Return a possible value
1049 # NOTE: Do not call this method directly, but use `v.expr`
1050 # This method is here to be implemented by subclasses.
1051 private fun expr
(v
: NaiveInterpreter): nullable Instance
1053 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1057 # Evaluate the node as a statement.
1058 # NOTE: Do not call this method directly, but use `v.stmt`
1059 # This method is here to be implemented by subclasses (no need to return something).
1060 private fun stmt
(v
: NaiveInterpreter)
1067 redef class ABlockExpr
1070 var last
= self.n_expr
.last
1071 for e
in self.n_expr
do
1072 if e
== last
then break
1074 if v
.is_escaping
then return null
1081 for e
in self.n_expr
do
1083 if v
.is_escaping
then return
1088 redef class AVardeclExpr
1091 var ne
= self.n_expr
1094 if i
== null then return
1095 v
.frame
.map
[self.variable
.as(not null)] = i
1100 redef class AVarExpr
1103 return v
.frame
.map
[self.variable
.as(not null)]
1107 redef class AVarAssignExpr
1110 var i
= v
.expr
(self.n_value
)
1111 if i
== null then return null
1112 v
.frame
.map
[self.variable
.as(not null)] = i
1117 redef class AVarReassignExpr
1120 var vari
= v
.frame
.map
[self.variable
.as(not null)]
1121 var value
= v
.expr
(self.n_value
)
1122 if value
== null then return
1123 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1125 v
.frame
.map
[self.variable
.as(not null)] = res
1129 redef class ASelfExpr
1132 return v
.frame
.arguments
.first
1136 redef class AContinueExpr
1139 var ne
= self.n_expr
1142 if i
== null then return
1145 v
.continuemark
= self.escapemark
1149 redef class ABreakExpr
1152 var ne
= self.n_expr
1155 if i
== null then return
1158 v
.breakmark
= self.escapemark
1162 redef class AReturnExpr
1165 var ne
= self.n_expr
1168 if i
== null then return
1171 v
.returnmark
= v
.frame
1175 redef class AAbortExpr
1186 var cond
= v
.expr
(self.n_expr
)
1187 if cond
== null then return null
1188 if cond
.is_true
then
1189 return v
.expr
(self.n_then
.as(not null))
1191 return v
.expr
(self.n_else
.as(not null))
1197 var cond
= v
.expr
(self.n_expr
)
1198 if cond
== null then return
1199 if cond
.is_true
then
1207 redef class AIfexprExpr
1210 var cond
= v
.expr
(self.n_expr
)
1211 if cond
== null then return null
1212 if cond
.is_true
then
1213 return v
.expr
(self.n_then
)
1215 return v
.expr
(self.n_else
)
1223 v
.stmt
(self.n_block
)
1224 v
.is_break
(self.escapemark
) # Clear the break (if any)
1228 redef class AWhileExpr
1232 var cond
= v
.expr
(self.n_expr
)
1233 if cond
== null then return
1234 if not cond
.is_true
then return
1235 v
.stmt
(self.n_block
)
1236 if v
.is_break
(self.escapemark
) then return
1237 v
.is_continue
(self.escapemark
) # Clear the break
1238 if v
.is_escaping
then return
1243 redef class ALoopExpr
1247 v
.stmt
(self.n_block
)
1248 if v
.is_break
(self.escapemark
) then return
1249 v
.is_continue
(self.escapemark
) # Clear the break
1250 if v
.is_escaping
then return
1255 redef class AForExpr
1258 var col
= v
.expr
(self.n_expr
)
1259 if col
== null then return
1260 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1262 #self.debug("col {col}")
1263 var iter
= v
.callsite
(method_iterator
, [col
]).as(not null)
1264 #self.debug("iter {iter}")
1266 var isok
= v
.callsite
(method_is_ok
, [iter
]).as(not null)
1267 if not isok
.is_true
then return
1268 if self.variables
.length
== 1 then
1269 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1270 #self.debug("item {item}")
1271 v
.frame
.map
[self.variables
.first
] = item
1272 else if self.variables
.length
== 2 then
1273 var key
= v
.callsite
(method_key
, [iter
]).as(not null)
1274 v
.frame
.map
[self.variables
[0]] = key
1275 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1276 v
.frame
.map
[self.variables
[1]] = item
1280 v
.stmt
(self.n_block
)
1281 if v
.is_break
(self.escapemark
) then return
1282 v
.is_continue
(self.escapemark
) # Clear the break
1283 if v
.is_escaping
then return
1284 v
.callsite
(method_next
, [iter
])
1289 redef class AAssertExpr
1292 var cond
= v
.expr
(self.n_expr
)
1293 if cond
== null then return
1294 if not cond
.is_true
then
1296 if v
.is_escaping
then return
1299 fatal
(v
, "Assert '{nid.text}' failed")
1301 fatal
(v
, "Assert failed")
1311 var cond
= v
.expr
(self.n_expr
)
1312 if cond
== null then return null
1313 if cond
.is_true
then return cond
1314 return v
.expr
(self.n_expr2
)
1318 redef class AImpliesExpr
1321 var cond
= v
.expr
(self.n_expr
)
1322 if cond
== null then return null
1323 if not cond
.is_true
then return v
.true_instance
1324 return v
.expr
(self.n_expr2
)
1328 redef class AAndExpr
1331 var cond
= v
.expr
(self.n_expr
)
1332 if cond
== null then return null
1333 if not cond
.is_true
then return cond
1334 return v
.expr
(self.n_expr2
)
1338 redef class ANotExpr
1341 var cond
= v
.expr
(self.n_expr
)
1342 if cond
== null then return null
1343 return v
.bool_instance
(not cond
.is_true
)
1347 redef class AOrElseExpr
1350 var i
= v
.expr
(self.n_expr
)
1351 if i
== null then return null
1352 if i
!= v
.null_instance
then return i
1353 return v
.expr
(self.n_expr2
)
1357 redef class AIntExpr
1360 return v
.int_instance
(self.value
.as(not null))
1364 redef class AFloatExpr
1367 return v
.float_instance
(self.value
.as(not null))
1371 redef class ACharExpr
1374 return v
.char_instance
(self.value
.as(not null))
1378 redef class AArrayExpr
1381 var val
= new Array[Instance]
1382 for nexpr
in self.n_exprs
.n_exprs
do
1383 var i
= v
.expr
(nexpr
)
1384 if i
== null then return null
1387 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1388 var elttype
= mtype
.arguments
.first
1389 return v
.array_instance
(val
, elttype
)
1393 redef class AStringFormExpr
1396 var txt
= self.value
.as(not null)
1397 var nat
= v
.native_string_instance
(txt
)
1398 var res
= v
.send
(v
.force_get_primitive_method
("to_s", nat
.mtype
), [nat
]).as(not null)
1403 redef class ASuperstringExpr
1406 var array
= new Array[Instance]
1407 for nexpr
in n_exprs
do
1408 var i
= v
.expr
(nexpr
)
1409 if i
== null then return null
1412 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1413 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1419 redef class ACrangeExpr
1422 var e1
= v
.expr
(self.n_expr
)
1423 if e1
== null then return null
1424 var e2
= v
.expr
(self.n_expr2
)
1425 if e2
== null then return null
1426 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1427 var res
= new MutableInstance(mtype
)
1428 v
.init_instance
(res
)
1429 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1434 redef class AOrangeExpr
1437 var e1
= v
.expr
(self.n_expr
)
1438 if e1
== null then return null
1439 var e2
= v
.expr
(self.n_expr2
)
1440 if e2
== null then return null
1441 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1442 var res
= new MutableInstance(mtype
)
1443 v
.init_instance
(res
)
1444 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1449 redef class ATrueExpr
1452 return v
.bool_instance
(true)
1456 redef class AFalseExpr
1459 return v
.bool_instance
(false)
1463 redef class ANullExpr
1466 return v
.null_instance
1470 redef class AIsaExpr
1473 var i
= v
.expr
(self.n_expr
)
1474 if i
== null then return null
1475 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1476 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1480 redef class AAsCastExpr
1483 var i
= v
.expr
(self.n_expr
)
1484 if i
== null then return null
1485 var mtype
= self.mtype
.as(not null)
1486 var amtype
= v
.unanchor_type
(mtype
)
1487 if not v
.is_subtype
(i
.mtype
, amtype
) then
1488 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
1494 redef class AAsNotnullExpr
1497 var i
= v
.expr
(self.n_expr
)
1498 if i
== null then return null
1499 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1500 if i
.mtype
isa MNullType then
1501 fatal
(v
, "Cast failed")
1507 redef class AParExpr
1510 return v
.expr
(self.n_expr
)
1514 redef class AOnceExpr
1517 if v
.onces
.has_key
(self) then
1518 return v
.onces
[self]
1520 var res
= v
.expr
(self.n_expr
)
1521 if res
== null then return null
1528 redef class ASendExpr
1531 var recv
= v
.expr
(self.n_expr
)
1532 if recv
== null then return null
1534 for a
in self.raw_arguments
do
1536 if i
== null then return null
1540 var res
= v
.callsite
(callsite
, args
)
1545 redef class ASendReassignFormExpr
1548 var recv
= v
.expr
(self.n_expr
)
1549 if recv
== null then return
1551 for a
in self.raw_arguments
do
1553 if i
== null then return
1556 var value
= v
.expr
(self.n_value
)
1557 if value
== null then return
1559 var read
= v
.callsite
(callsite
, args
)
1562 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
1563 assert write
!= null
1567 v
.callsite
(write_callsite
, args
)
1571 redef class ASuperExpr
1574 var recv
= v
.frame
.arguments
.first
1576 for a
in self.n_args
.n_exprs
do
1578 if i
== null then return null
1582 var callsite
= self.callsite
1583 if callsite
!= null then
1584 # Add additionnals arguments for the super init call
1585 if args
.length
== 1 then
1586 for i
in [0..callsite
.msignature
.arity
[ do
1587 args
.add
(v
.frame
.arguments
[i
+1])
1591 var res
= v
.callsite
(callsite
, args
)
1595 if args
.length
== 1 then
1596 args
= v
.frame
.arguments
1599 # stantard call-next-method
1600 var mpropdef
= self.mpropdef
1601 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1602 var res
= v
.call_without_varargs
(mpropdef
, args
)
1607 redef class ANewExpr
1610 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1611 var recv
: Instance = new MutableInstance(mtype
)
1612 v
.init_instance
(recv
)
1614 for a
in self.n_args
.n_exprs
do
1616 if i
== null then return null
1619 var res2
= v
.callsite
(callsite
, args
)
1620 if res2
!= null then
1621 #self.debug("got {res2} from {mproperty}. drop {recv}")
1628 redef class AAttrExpr
1631 var recv
= v
.expr
(self.n_expr
)
1632 if recv
== null then return null
1633 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1634 var mproperty
= self.mproperty
.as(not null)
1635 return v
.read_attribute
(mproperty
, recv
)
1639 redef class AAttrAssignExpr
1642 var recv
= v
.expr
(self.n_expr
)
1643 if recv
== null then return
1644 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1645 var i
= v
.expr
(self.n_value
)
1646 if i
== null then return
1647 var mproperty
= self.mproperty
.as(not null)
1648 v
.write_attribute
(mproperty
, recv
, i
)
1652 redef class AAttrReassignExpr
1655 var recv
= v
.expr
(self.n_expr
)
1656 if recv
== null then return
1657 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1658 var value
= v
.expr
(self.n_value
)
1659 if value
== null then return
1660 var mproperty
= self.mproperty
.as(not null)
1661 var attr
= v
.read_attribute
(mproperty
, recv
)
1662 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
1664 v
.write_attribute
(mproperty
, recv
, res
)
1668 redef class AIssetAttrExpr
1671 var recv
= v
.expr
(self.n_expr
)
1672 if recv
== null then return null
1673 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1674 var mproperty
= self.mproperty
.as(not null)
1675 assert recv
isa MutableInstance
1676 return v
.bool_instance
(recv
.attributes
.has_key
(mproperty
))
1680 redef class ADebugTypeExpr