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 private import parser
::tables
27 redef class ToolContext
28 # --discover-call-trace
29 var opt_discover_call_trace
: OptionBool = new OptionBool("Trace calls of the first invocation of a method", "--discover-call-trace")
34 self.option_context
.add_option
(self.opt_discover_call_trace
)
38 redef class ModelBuilder
39 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
40 # `arguments` are the command-line arguments in order
42 # 1. the AST is fully loaded.
43 # 2. the model is fully built.
44 # 3. the instructions are fully analysed.
45 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
48 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
50 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
51 init_naive_interpreter
(interpreter
, mainmodule
)
54 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
57 private fun init_naive_interpreter
(interpreter
: NaiveInterpreter, mainmodule
: MModule) do
58 var sys_type
= mainmodule
.sys_type
59 if sys_type
== null then return # no class Sys
60 var mainobj
= new MutableInstance(sys_type
)
61 interpreter
.mainobj
= mainobj
62 interpreter
.init_instance
(mainobj
)
63 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
64 if initprop
!= null then
65 interpreter
.send
(initprop
, [mainobj
])
67 var mainprop
= mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
68 if mainprop
!= null then
69 interpreter
.send
(mainprop
, [mainobj
])
74 # The visitor that interprets the Nit Program by walking on the AST
75 private class NaiveInterpreter
76 # The modelbuilder that know the AST and its associations with the model
77 var modelbuilder
: ModelBuilder
79 # The main moduleof the program (used to lookup methoda
80 var mainmodule
: MModule
82 # The command line arguments of the interpreted program
83 # arguments.first is the program name
84 # arguments[1] is the first argument
85 var arguments
: Array[String]
87 var mainobj
: nullable Instance
89 init(modelbuilder
: ModelBuilder, mainmodule
: MModule, arguments
: Array[String])
91 self.modelbuilder
= modelbuilder
92 self.mainmodule
= mainmodule
93 self.arguments
= arguments
94 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
95 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
96 self.null_instance
= new MutableInstance(mainmodule
.model
.null_type
)
99 # Subtype test in the context of the mainmodule
100 fun is_subtype
(sub
, sup
: MType): Bool
102 return sub
.is_subtype
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType), sup
)
105 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
107 assert recv
isa MClassType
108 return self.modelbuilder
.force_get_primitive_method
(self.frame
.current_node
, name
, recv
.mclass
, self.mainmodule
)
111 # Is a return executed?
112 # Set this mark to skip the evaluation until the end of the specified method frame
113 var returnmark
: nullable Frame = null
115 # Is a break executed?
116 # Set this mark to skip the evaluation until a labeled statement catch it with `is_break`
117 var breakmark
: nullable EscapeMark = null
119 # Is a continue executed?
120 # Set this mark to skip the evaluation until a labeled statement catch it with `is_continue`
121 var continuemark
: nullable EscapeMark = null
123 # Is a return or a break or a continue executed?
124 # Use this function to know if you must skip the evaluation of statements
125 fun is_escaping
: Bool do return returnmark
!= null or breakmark
!= null or continuemark
!= null
127 # The value associated with the current return/break/continue, if any.
128 # Set the value when you set a escapemark.
129 # Read the value when you catch a mark or reach the end of a method
130 var escapevalue
: nullable Instance = null
132 # If there is a break and is associated with `escapemark`, then return true an clear the mark.
133 # If there is no break or if `escapemark` is null then return false.
134 # Use this function to catch a potential break.
135 fun is_break
(escapemark
: nullable EscapeMark): Bool
137 if escapemark
!= null and self.breakmark
== escapemark
then
138 self.breakmark
= null
145 # If there is a continue and is associated with `escapemark`, then return true an clear the mark.
146 # If there is no continue or if `escapemark` is null then return false.
147 # Use this function to catch a potential continue.
148 fun is_continue
(escapemark
: nullable EscapeMark): Bool
150 if escapemark
!= null and self.continuemark
== escapemark
then
151 self.continuemark
= null
158 # Evaluate `n` as an expression in the current context.
159 # Return the value of the expression.
160 # If `n` cannot be evaluated, then aborts.
161 fun expr
(n
: AExpr): nullable Instance
163 var frame
= self.frame
164 var old
= frame
.current_node
165 frame
.current_node
= n
166 #n.debug("IN Execute expr")
168 if i
== null and not self.is_escaping
then
169 n
.debug
("inconsitance: no value and not escaping.")
171 var implicit_cast_to
= n
.implicit_cast_to
172 if implicit_cast_to
!= null then
173 var mtype
= self.unanchor_type
(implicit_cast_to
)
174 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
177 #n.debug("OUT Execute expr: value is {i}")
178 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
179 frame
.current_node
= old
183 # Evaluate `n` as a statement in the current context.
184 # Do nothing if `n` is null.
185 # If `n` cannot be evaluated, then aborts.
186 fun stmt
(n
: nullable AExpr)
189 var frame
= self.frame
190 var old
= frame
.current_node
191 frame
.current_node
= n
192 #n.debug("Execute stmt")
194 frame
.current_node
= old
198 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
199 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
201 # Return the boolean instance associated with `val`.
202 fun bool_instance
(val
: Bool): Instance
204 if val
then return self.true_instance
else return self.false_instance
207 # Return the integer instance associated with `val`.
208 fun int_instance
(val
: Int): Instance
210 var ic
= self.mainmodule
.get_primitive_class
("Int")
211 return new PrimitiveInstance[Int](ic
.mclass_type
, val
)
214 # Return the char instance associated with `val`.
215 fun char_instance
(val
: Char): Instance
217 var ic
= self.mainmodule
.get_primitive_class
("Char")
218 return new PrimitiveInstance[Char](ic
.mclass_type
, val
)
221 # Return the float instance associated with `val`.
222 fun float_instance
(val
: Float): Instance
224 var ic
= self.mainmodule
.get_primitive_class
("Float")
225 return new PrimitiveInstance[Float](ic
.mclass_type
, val
)
228 # The unique intance of the `true` value.
229 var true_instance
: Instance
231 # The unique intance of the `false` value.
232 var false_instance
: Instance
234 # The unique intance of the `null` value.
235 var null_instance
: Instance
237 # Return a new array made of `values`.
238 # The dynamic type of the result is Array[elttype].
239 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
241 assert not elttype
.need_anchor
242 var nat
= new PrimitiveInstance[Array[Instance]](self.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([elttype
]), values
)
243 var mtype
= self.mainmodule
.get_primitive_class
("Array").get_mtype
([elttype
])
244 var res
= new MutableInstance(mtype
)
245 self.init_instance
(res
)
246 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
250 # Return a new native string initialized with `txt`
251 fun native_string_instance
(txt
: String): Instance
253 var val
= new FlatBuffer.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
268 var b
= new FlatBuffer
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 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
353 # Look for the AST node that implements the property
354 var mproperty
= mpropdef
.mproperty
355 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
356 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
357 self.parameter_check
(npropdef
, mpropdef
, args
)
358 return npropdef
.call
(self, mpropdef
, args
)
359 else if mproperty
.name
== "init" then
360 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
361 self.parameter_check
(nclassdef
, mpropdef
, args
)
362 return nclassdef
.call
(self, mpropdef
, args
)
364 fatal
("Fatal Error: method {mpropdef} not found in the AST")
369 # Generate type checks in the C code to check covariant parameters
370 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
372 var msignature
= mpropdef
.msignature
373 for i
in [0..msignature
.arity
[ do
374 # skip test for vararg since the array is instantiated with the correct polymorphic type
375 if msignature
.vararg_rank
== i
then continue
377 # skip if the cast is not required
378 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
379 if not origmtype
.need_anchor
then continue
381 # get the parameter type
382 var mtype
= msignature
.mparameters
[i
].mtype
383 var anchor
= args
.first
.mtype
.as(MClassType)
384 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
385 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
386 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
391 # Common code for runtime injected calls and normal calls
392 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
394 if mtype
isa MNullType then
395 if mproperty
.name
== "==" then
396 return self.bool_instance
(args
[0] == args
[1])
397 else if mproperty
.name
== "!=" then
398 return self.bool_instance
(args
[0] != args
[1])
400 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
401 fatal
("Receiver is null")
406 # Execute a full `callsite` for given `args`
407 # Use this method, instead of `send` to execute and control the aditionnal behavior of the call-sites
408 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
410 return send
(callsite
.mproperty
, arguments
)
413 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
414 # Return a falue if `mproperty` is a function, or null if it is a procedure.
415 # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
416 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
418 var recv
= args
.first
419 var mtype
= recv
.mtype
420 var ret
= send_commons
(mproperty
, args
, mtype
)
421 if ret
!= null then return ret
422 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
423 return self.call
(propdef
, args
)
426 # Read the attribute `mproperty` of an instance `recv` and return its value.
427 # If the attribute in not yet initialized, then aborts with an error message.
428 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
430 assert recv
isa MutableInstance
431 if not recv
.attributes
.has_key
(mproperty
) then
432 fatal
("Uninitialized attribute {mproperty.name}")
435 return recv
.attributes
[mproperty
]
438 # Replace in `recv` the value of the attribute `mproperty` by `value`
439 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
441 assert recv
isa MutableInstance
442 recv
.attributes
[mproperty
] = value
445 # Is the attribute `mproperty` initialized the instance `recv`?
446 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
448 assert recv
isa MutableInstance
449 return recv
.attributes
.has_key
(mproperty
)
452 # Collect attributes of a type in the order of their init
453 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
455 var cache
= self.collect_attr_propdef_cache
456 if cache
.has_key
(mtype
) then return cache
[mtype
]
458 var res
= new Array[AAttrPropdef]
459 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
460 self.mainmodule
.linearize_mclassdefs
(cds
)
462 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
463 for npropdef
in n
.n_propdefs
do
464 if npropdef
isa AAttrPropdef then
474 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
476 # Fill the initial values of the newly created instance `recv`.
477 # `recv.mtype` is used to know what must be filled.
478 fun init_instance
(recv
: Instance)
480 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
481 npropdef
.init_expr
(self, recv
)
485 # This function determine the correct type according the reciever of the current definition (self).
486 fun unanchor_type
(mtype
: MType): MType
488 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
492 # An instance represents a value of the executed program.
493 abstract class Instance
494 # The dynamic type of the instance
495 # ASSERT: not self.mtype.is_anchored
498 # return true if the instance is the true value.
499 # return false if the instance is the true value.
501 fun is_true
: Bool do abort
503 # Return true if `self` IS `o` (using the Nit semantic of is)
504 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
506 # Human readable object identity "Type#number"
507 redef fun to_s
do return "{mtype}"
509 # Return the integer value if the instance is an integer.
511 fun to_i
: Int do abort
513 # Return the integer value if the instance is a float.
515 fun to_f
: Float do abort
517 # The real value encapsulated if the instance is primitive.
519 fun val
: Object do abort
522 # A instance with attribute (standards objects)
523 class MutableInstance
526 # The values of the attributes
527 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
530 # Special instance to handle primitives values (int, bool, etc.)
531 # The trick it just to encapsulate the <<real>> value
532 class PrimitiveInstance[E
: Object]
535 # The real value encapsulated
538 init(mtype
: MType, val
: E
)
546 if val
== true then return true
547 if val
== false then return false
553 if not o
isa PrimitiveInstance[Object] then return false
554 return self.val
== o
.val
559 if not o
isa PrimitiveInstance[Object] then return false
560 return self.val
.is_same_instance
(o
.val
)
563 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
565 redef fun to_i
do return val
.as(Int)
567 redef fun to_f
do return val
.as(Float)
570 # Information about local variables in a running method
572 # The current visited node
573 # The node is stored by frame to keep a stack trace
574 var current_node
: ANode
575 # The executed property.
576 # A Method in case of a call, an attribute in case of a default initialization.
577 var mpropdef
: MPropDef
578 # Arguments of the method (the first is te receiver
579 var arguments
: Array[Instance]
580 # Mapping betwen a variable an the current value
581 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
585 # Aborts the program with a message
586 # `v` is used to know if a colored message is displayed or not
587 private fun fatal
(v
: NaiveInterpreter, message
: String)
589 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
590 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
592 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
593 sys
.stderr
.write
(v
.stack_trace
)
594 sys
.stderr
.write
("\n")
601 # Execute a `mpropdef` associated with the current node.
602 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
604 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
609 redef class AMethPropdef
612 redef fun call
(v
, mpropdef
, args
)
614 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
615 var res
= call_commons
(v
, mpropdef
, args
, f
)
617 if v
.returnmark
== f
then
626 private fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
628 for i
in [0..mpropdef
.msignature
.arity
[ do
629 var variable
= self.n_signature
.n_params
[i
].variable
630 assert variable
!= null
631 f
.map
[variable
] = arguments
[i
+1]
636 if mpropdef
.is_abstract
then
637 v
.fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{arguments.first.mtype}`")
641 # Call the implicit super-init
642 var auto_super_inits
= self.auto_super_inits
643 if auto_super_inits
!= null then
644 var args
= [arguments
.first
]
645 for auto_super_init
in auto_super_inits
do
647 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
648 args
.add
(arguments
[i
])
650 v
.callsite
(auto_super_init
, args
)
654 if n_block
!= null then
658 return intern_call
(v
, mpropdef
, arguments
)
662 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
664 var pname
= mpropdef
.mproperty
.name
665 var cname
= mpropdef
.mclassdef
.mclass
.name
666 if pname
== "output" then
667 var recv
= args
.first
670 else if pname
== "object_id" then
671 var recv
= args
.first
672 if recv
isa PrimitiveInstance[Object] then
673 return v
.int_instance
(recv
.val
.object_id
)
675 return v
.int_instance
(recv
.object_id
)
677 else if pname
== "output_class_name" then
678 var recv
= args
.first
681 else if pname
== "native_class_name" then
682 var recv
= args
.first
683 var txt
= recv
.mtype
.to_s
684 return v
.native_string_instance
(txt
)
685 else if pname
== "==" then
686 # == is correclt redefined for instances
687 return v
.bool_instance
(args
[0] == args
[1])
688 else if pname
== "!=" then
689 return v
.bool_instance
(args
[0] != args
[1])
690 else if pname
== "is_same_type" then
691 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
692 else if pname
== "is_same_instance" then
693 return v
.bool_instance
(args
[1] != null and args
[0].eq_is
(args
[1]))
694 else if pname
== "exit" then
697 else if pname
== "sys" then
699 else if cname
== "Int" then
700 var recvval
= args
[0].to_i
701 if pname
== "unary -" then
702 return v
.int_instance
(-args
[0].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
.int_instance
(args
[0].to_i
- args
[1].to_i
)
707 else if pname
== "*" then
708 return v
.int_instance
(args
[0].to_i
* args
[1].to_i
)
709 else if pname
== "%" then
710 return v
.int_instance
(args
[0].to_i
% args
[1].to_i
)
711 else if pname
== "/" then
712 return v
.int_instance
(args
[0].to_i
/ args
[1].to_i
)
713 else if pname
== "<" then
714 return v
.bool_instance
(args
[0].to_i
< args
[1].to_i
)
715 else if pname
== ">" then
716 return v
.bool_instance
(args
[0].to_i
> args
[1].to_i
)
717 else if pname
== "<=" then
718 return v
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
719 else if pname
== ">=" then
720 return v
.bool_instance
(args
[0].to_i
>= args
[1].to_i
)
721 else if pname
== "<=>" then
722 return v
.int_instance
(args
[0].to_i
<=> args
[1].to_i
)
723 else if pname
== "ascii" then
724 return v
.char_instance
(args
[0].to_i
.ascii
)
725 else if pname
== "to_f" then
726 return v
.float_instance
(args
[0].to_i
.to_f
)
727 else if pname
== "lshift" then
728 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
729 else if pname
== "rshift" then
730 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
731 else if pname
== "rand" then
732 var res
= recvval
.rand
733 return v
.int_instance
(res
)
734 else if pname
== "bin_and" then
735 return v
.int_instance
(args
[0].to_i
.bin_and
(args
[1].to_i
))
736 else if pname
== "bin_or" then
737 return v
.int_instance
(args
[0].to_i
.bin_or
(args
[1].to_i
))
738 else if pname
== "bin_xor" then
739 return v
.int_instance
(args
[0].to_i
.bin_xor
(args
[1].to_i
))
740 else if pname
== "native_int_to_s" then
741 return v
.native_string_instance
(recvval
.to_s
)
742 else if pname
== "strerror_ext" then
743 return v
.native_string_instance
(recvval
.strerror
)
745 else if cname
== "Char" then
746 var recv
= args
[0].val
.as(Char)
747 if pname
== "ascii" then
748 return v
.int_instance
(recv
.ascii
)
749 else if pname
== "successor" then
750 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
751 else if pname
== "predecessor" then
752 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
753 else if pname
== "<" then
754 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
755 else if pname
== ">" then
756 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
757 else if pname
== "<=" then
758 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
759 else if pname
== ">=" then
760 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
761 else if pname
== "<=>" then
762 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
764 else if cname
== "Float" then
765 var recv
= args
[0].to_f
766 if pname
== "unary -" then
767 return v
.float_instance
(-recv
)
768 else if pname
== "+" then
769 return v
.float_instance
(recv
+ args
[1].to_f
)
770 else if pname
== "-" then
771 return v
.float_instance
(recv
- args
[1].to_f
)
772 else if pname
== "*" then
773 return v
.float_instance
(recv
* args
[1].to_f
)
774 else if pname
== "/" then
775 return v
.float_instance
(recv
/ args
[1].to_f
)
776 else if pname
== "<" then
777 return v
.bool_instance
(recv
< args
[1].to_f
)
778 else if pname
== ">" then
779 return v
.bool_instance
(recv
> args
[1].to_f
)
780 else if pname
== "<=" then
781 return v
.bool_instance
(recv
<= args
[1].to_f
)
782 else if pname
== ">=" then
783 return v
.bool_instance
(recv
>= args
[1].to_f
)
784 else if pname
== "to_i" then
785 return v
.int_instance
(recv
.to_i
)
786 else if pname
== "cos" then
787 return v
.float_instance
(args
[0].to_f
.cos
)
788 else if pname
== "sin" then
789 return v
.float_instance
(args
[0].to_f
.sin
)
790 else if pname
== "tan" then
791 return v
.float_instance
(args
[0].to_f
.tan
)
792 else if pname
== "acos" then
793 return v
.float_instance
(args
[0].to_f
.acos
)
794 else if pname
== "asin" then
795 return v
.float_instance
(args
[0].to_f
.asin
)
796 else if pname
== "atan" then
797 return v
.float_instance
(args
[0].to_f
.atan
)
798 else if pname
== "sqrt" then
799 return v
.float_instance
(args
[0].to_f
.sqrt
)
800 else if pname
== "exp" then
801 return v
.float_instance
(args
[0].to_f
.exp
)
802 else if pname
== "log" then
803 return v
.float_instance
(args
[0].to_f
.log
)
804 else if pname
== "pow" then
805 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
806 else if pname
== "rand" then
807 return v
.float_instance
(args
[0].to_f
.rand
)
808 else if pname
== "abs" then
809 return v
.float_instance
(args
[0].to_f
.abs
)
810 else if pname
== "hypot_with" then
811 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
812 else if pname
== "is_nan" then
813 return v
.bool_instance
(args
[0].to_f
.is_nan
)
814 else if pname
== "is_inf_extern" then
815 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
817 else if cname
== "NativeString" then
818 if pname
== "init" then
819 return v
.native_string_instance
("!" * args
[1].to_i
)
821 var recvval
= args
.first
.val
.as(Buffer)
822 if pname
== "[]" then
823 var arg1
= args
[1].to_i
824 if arg1
>= recvval
.length
or arg1
< 0 then
825 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
827 return v
.char_instance
(recvval
.chars
[arg1
])
828 else if pname
== "[]=" then
829 var arg1
= args
[1].to_i
830 if arg1
>= recvval
.length
or arg1
< 0 then
831 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
833 recvval
.chars
[arg1
] = args
[2].val
.as(Char)
835 else if pname
== "copy_to" then
836 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
837 var destval
= args
[1].val
.as(FlatBuffer)
838 var lenval
= args
[2].to_i
839 var fromval
= args
[3].to_i
840 var toval
= args
[4].to_i
842 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
844 if fromval
+ lenval
>= recvval
.length
then
845 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
848 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
850 if toval
+ lenval
>= destval
.length
then
851 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
853 recvval
.as(FlatBuffer).copy
(fromval
, lenval
, destval
, toval
)
855 else if pname
== "atoi" then
856 return v
.int_instance
(recvval
.to_i
)
857 else if pname
== "file_exists" then
858 return v
.bool_instance
(recvval
.to_s
.file_exists
)
859 else if pname
== "file_mkdir" then
862 else if pname
== "file_chdir" then
865 else if pname
== "file_realpath" then
866 return v
.native_string_instance
(recvval
.to_s
.realpath
)
867 else if pname
== "get_environ" then
868 var txt
= recvval
.to_s
.environ
869 return v
.native_string_instance
(txt
)
870 else if pname
== "system" then
871 var res
= sys
.system
(recvval
.to_s
)
872 return v
.int_instance
(res
)
873 else if pname
== "atof" then
874 return v
.float_instance
(recvval
.to_f
)
876 else if pname
== "calloc_string" then
877 return v
.native_string_instance
("!" * args
[1].to_i
)
878 else if cname
== "NativeArray" then
879 if pname
== "init" then
880 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
881 return new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
883 var recvval
= args
.first
.val
.as(Array[Instance])
884 if pname
== "[]" then
885 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
886 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
888 return recvval
[args
[1].to_i
]
889 else if pname
== "[]=" then
890 recvval
[args
[1].to_i
] = args
[2]
892 else if pname
== "length" then
893 return v
.int_instance
(recvval
.length
)
894 else if pname
== "copy_to" then
895 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
898 else if cname
== "NativeFile" then
899 if pname
== "native_stdout" then
900 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdout
)
901 else if pname
== "native_stdin" then
902 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdin
)
903 else if pname
== "native_stderr" then
904 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stderr
)
905 else if pname
== "io_open_read" then
906 var a1
= args
[1].val
.as(Buffer)
907 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
908 else if pname
== "io_open_write" then
909 var a1
= args
[1].val
.as(Buffer)
910 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
912 var recvval
= args
.first
.val
913 if pname
== "io_write" then
914 var a1
= args
[1].val
.as(Buffer)
915 recvval
.as(OStream).write
(a1
.substring
(0, args
[2].to_i
).to_s
)
917 else if pname
== "io_read" then
918 var str
= recvval
.as(IStream).read
(args
[2].to_i
)
919 var a1
= args
[1].val
.as(Buffer)
920 new FlatBuffer.from
(str
).copy
(0, str
.length
, a1
.as(FlatBuffer), 0)
921 return v
.int_instance
(str
.length
)
922 else if pname
== "io_close" then
923 recvval
.as(IOS).close
924 return v
.int_instance
(0)
925 else if pname
== "address_is_null" then
926 return v
.false_instance
928 else if pname
== "calloc_array" then
929 var recvtype
= args
.first
.mtype
.as(MClassType)
931 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
932 mtype
= mtype
.arguments
.first
933 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
934 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
935 else if pname
== "native_argc" then
936 return v
.int_instance
(v
.arguments
.length
)
937 else if pname
== "native_argv" then
938 var txt
= v
.arguments
[args
[1].to_i
]
939 return v
.native_string_instance
(txt
)
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
)
964 else if pname
== "errno" then
965 return v
.int_instance
(sys
.errno
)
966 else if pname
== "address_is_null" then
967 return v
.false_instance
969 if mpropdef
.is_intern
then
970 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
971 else if mpropdef
.is_extern
then
972 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
974 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
980 redef class AbstractArray[E
]
981 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
983 self.copy_to
(start
, len
, dest
, new_start
)
987 redef class AAttrPropdef
988 redef fun call
(v
, mpropdef
, args
)
990 var recv
= args
.first
991 assert recv
isa MutableInstance
992 var attr
= self.mpropdef
.mproperty
993 if mpropdef
== mreadpropdef
then
994 assert args
.length
== 1
995 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
996 return evaluate_expr
(v
, recv
)
997 else if mpropdef
== mwritepropdef
then
998 assert args
.length
== 2
999 v
.write_attribute
(attr
, recv
, args
[1])
1006 # Evaluate and set the default value of the attribute in `recv`
1007 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1009 if is_lazy
then return
1010 var nexpr
= self.n_expr
1011 if nexpr
!= null then
1012 evaluate_expr
(v
, recv
)
1015 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1016 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1017 if mtype
isa MNullableType then
1018 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1022 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance): Instance
1024 assert recv
isa MutableInstance
1025 var nexpr
= self.n_expr
1026 assert nexpr
!= null
1027 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
1029 var val
= v
.expr
(nexpr
)
1032 assert not v
.is_escaping
1033 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1038 redef class AClassdef
1039 # Execute an implicit `mpropdef` associated with the current node.
1040 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1042 var super_inits
= self.super_inits
1043 if super_inits
!= null then
1044 var args_of_super
= args
1045 if args
.length
> 1 then args_of_super
= [args
.first
]
1046 for su
in super_inits
do
1047 v
.send
(su
, args_of_super
)
1050 var recv
= args
.first
1051 assert recv
isa MutableInstance
1053 # Collect undefined attributes
1054 for npropdef
in self.n_propdefs
do
1055 if npropdef
isa AAttrPropdef and not npropdef
.noinit
and npropdef
.n_expr
== null then
1056 v
.write_attribute
(npropdef
.mpropdef
.mproperty
, recv
, args
[i
])
1065 # Evaluate the node as a possible expression.
1066 # Return a possible value
1067 # NOTE: Do not call this method directly, but use `v.expr`
1068 # This method is here to be implemented by subclasses.
1069 private fun expr
(v
: NaiveInterpreter): nullable Instance
1071 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1075 # Evaluate the node as a statement.
1076 # NOTE: Do not call this method directly, but use `v.stmt`
1077 # This method is here to be implemented by subclasses (no need to return something).
1078 private fun stmt
(v
: NaiveInterpreter)
1085 redef class ABlockExpr
1088 var last
= self.n_expr
.last
1089 for e
in self.n_expr
do
1090 if e
== last
then break
1092 if v
.is_escaping
then return null
1099 for e
in self.n_expr
do
1101 if v
.is_escaping
then return
1106 redef class AVardeclExpr
1109 var ne
= self.n_expr
1112 if i
== null then return
1113 v
.frame
.map
[self.variable
.as(not null)] = i
1118 redef class AVarExpr
1121 return v
.frame
.map
[self.variable
.as(not null)]
1125 redef class AVarAssignExpr
1128 var i
= v
.expr
(self.n_value
)
1129 if i
== null then return null
1130 v
.frame
.map
[self.variable
.as(not null)] = i
1135 redef class AVarReassignExpr
1138 var vari
= v
.frame
.map
[self.variable
.as(not null)]
1139 var value
= v
.expr
(self.n_value
)
1140 if value
== null then return
1141 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1143 v
.frame
.map
[self.variable
.as(not null)] = res
1147 redef class ASelfExpr
1150 return v
.frame
.arguments
.first
1154 redef class AContinueExpr
1157 var ne
= self.n_expr
1160 if i
== null then return
1163 v
.continuemark
= self.escapemark
1167 redef class ABreakExpr
1170 var ne
= self.n_expr
1173 if i
== null then return
1176 v
.breakmark
= self.escapemark
1180 redef class AReturnExpr
1183 var ne
= self.n_expr
1186 if i
== null then return
1189 v
.returnmark
= v
.frame
1193 redef class AAbortExpr
1204 var cond
= v
.expr
(self.n_expr
)
1205 if cond
== null then return null
1206 if cond
.is_true
then
1207 return v
.expr
(self.n_then
.as(not null))
1209 return v
.expr
(self.n_else
.as(not null))
1215 var cond
= v
.expr
(self.n_expr
)
1216 if cond
== null then return
1217 if cond
.is_true
then
1225 redef class AIfexprExpr
1228 var cond
= v
.expr
(self.n_expr
)
1229 if cond
== null then return null
1230 if cond
.is_true
then
1231 return v
.expr
(self.n_then
)
1233 return v
.expr
(self.n_else
)
1241 v
.stmt
(self.n_block
)
1242 v
.is_break
(self.escapemark
) # Clear the break (if any)
1246 redef class AWhileExpr
1250 var cond
= v
.expr
(self.n_expr
)
1251 if cond
== null then return
1252 if not cond
.is_true
then return
1253 v
.stmt
(self.n_block
)
1254 if v
.is_break
(self.escapemark
) then return
1255 v
.is_continue
(self.escapemark
) # Clear the break
1256 if v
.is_escaping
then return
1261 redef class ALoopExpr
1265 v
.stmt
(self.n_block
)
1266 if v
.is_break
(self.escapemark
) then return
1267 v
.is_continue
(self.escapemark
) # Clear the break
1268 if v
.is_escaping
then return
1273 redef class AForExpr
1276 var col
= v
.expr
(self.n_expr
)
1277 if col
== null then return
1278 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1280 #self.debug("col {col}")
1281 var iter
= v
.callsite
(method_iterator
, [col
]).as(not null)
1282 #self.debug("iter {iter}")
1284 var isok
= v
.callsite
(method_is_ok
, [iter
]).as(not null)
1285 if not isok
.is_true
then return
1286 if self.variables
.length
== 1 then
1287 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1288 #self.debug("item {item}")
1289 v
.frame
.map
[self.variables
.first
] = item
1290 else if self.variables
.length
== 2 then
1291 var key
= v
.callsite
(method_key
, [iter
]).as(not null)
1292 v
.frame
.map
[self.variables
[0]] = key
1293 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1294 v
.frame
.map
[self.variables
[1]] = item
1298 v
.stmt
(self.n_block
)
1299 if v
.is_break
(self.escapemark
) then return
1300 v
.is_continue
(self.escapemark
) # Clear the break
1301 if v
.is_escaping
then return
1302 v
.callsite
(method_next
, [iter
])
1307 redef class AAssertExpr
1310 var cond
= v
.expr
(self.n_expr
)
1311 if cond
== null then return
1312 if not cond
.is_true
then
1314 if v
.is_escaping
then return
1317 fatal
(v
, "Assert '{nid.text}' failed")
1319 fatal
(v
, "Assert failed")
1329 var cond
= v
.expr
(self.n_expr
)
1330 if cond
== null then return null
1331 if cond
.is_true
then return cond
1332 return v
.expr
(self.n_expr2
)
1336 redef class AImpliesExpr
1339 var cond
= v
.expr
(self.n_expr
)
1340 if cond
== null then return null
1341 if not cond
.is_true
then return v
.true_instance
1342 return v
.expr
(self.n_expr2
)
1346 redef class AAndExpr
1349 var cond
= v
.expr
(self.n_expr
)
1350 if cond
== null then return null
1351 if not cond
.is_true
then return cond
1352 return v
.expr
(self.n_expr2
)
1356 redef class ANotExpr
1359 var cond
= v
.expr
(self.n_expr
)
1360 if cond
== null then return null
1361 return v
.bool_instance
(not cond
.is_true
)
1365 redef class AOrElseExpr
1368 var i
= v
.expr
(self.n_expr
)
1369 if i
== null then return null
1370 if i
!= v
.null_instance
then return i
1371 return v
.expr
(self.n_expr2
)
1375 redef class AIntExpr
1378 return v
.int_instance
(self.value
.as(not null))
1382 redef class AFloatExpr
1385 return v
.float_instance
(self.value
.as(not null))
1389 redef class ACharExpr
1392 return v
.char_instance
(self.value
.as(not null))
1396 redef class AArrayExpr
1399 var val
= new Array[Instance]
1400 for nexpr
in self.n_exprs
.n_exprs
do
1401 var i
= v
.expr
(nexpr
)
1402 if i
== null then return null
1405 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1406 var elttype
= mtype
.arguments
.first
1407 return v
.array_instance
(val
, elttype
)
1411 redef class AStringFormExpr
1414 var txt
= self.value
.as(not null)
1415 var nat
= v
.native_string_instance
(txt
)
1416 var res
= v
.send
(v
.force_get_primitive_method
("to_s", nat
.mtype
), [nat
]).as(not null)
1421 redef class ASuperstringExpr
1424 var array
= new Array[Instance]
1425 for nexpr
in n_exprs
do
1426 var i
= v
.expr
(nexpr
)
1427 if i
== null then return null
1430 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1431 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1437 redef class ACrangeExpr
1440 var e1
= v
.expr
(self.n_expr
)
1441 if e1
== null then return null
1442 var e2
= v
.expr
(self.n_expr2
)
1443 if e2
== null then return null
1444 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1445 var res
= new MutableInstance(mtype
)
1446 v
.init_instance
(res
)
1447 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1452 redef class AOrangeExpr
1455 var e1
= v
.expr
(self.n_expr
)
1456 if e1
== null then return null
1457 var e2
= v
.expr
(self.n_expr2
)
1458 if e2
== null then return null
1459 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1460 var res
= new MutableInstance(mtype
)
1461 v
.init_instance
(res
)
1462 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1467 redef class ATrueExpr
1470 return v
.bool_instance
(true)
1474 redef class AFalseExpr
1477 return v
.bool_instance
(false)
1481 redef class ANullExpr
1484 return v
.null_instance
1488 redef class AIsaExpr
1491 var i
= v
.expr
(self.n_expr
)
1492 if i
== null then return null
1493 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1494 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1498 redef class AAsCastExpr
1501 var i
= v
.expr
(self.n_expr
)
1502 if i
== null then return null
1503 var mtype
= self.mtype
.as(not null)
1504 var amtype
= v
.unanchor_type
(mtype
)
1505 if not v
.is_subtype
(i
.mtype
, amtype
) then
1506 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
1512 redef class AAsNotnullExpr
1515 var i
= v
.expr
(self.n_expr
)
1516 if i
== null then return null
1517 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1518 if i
.mtype
isa MNullType then
1519 fatal
(v
, "Cast failed")
1525 redef class AParExpr
1528 return v
.expr
(self.n_expr
)
1532 redef class AOnceExpr
1535 if v
.onces
.has_key
(self) then
1536 return v
.onces
[self]
1538 var res
= v
.expr
(self.n_expr
)
1539 if res
== null then return null
1546 redef class ASendExpr
1549 var recv
= v
.expr
(self.n_expr
)
1550 if recv
== null then return null
1552 for a
in self.raw_arguments
do
1554 if i
== null then return null
1558 var res
= v
.callsite
(callsite
, args
)
1563 redef class ASendReassignFormExpr
1566 var recv
= v
.expr
(self.n_expr
)
1567 if recv
== null then return
1569 for a
in self.raw_arguments
do
1571 if i
== null then return
1574 var value
= v
.expr
(self.n_value
)
1575 if value
== null then return
1577 var read
= v
.callsite
(callsite
, args
)
1580 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
1581 assert write
!= null
1585 v
.callsite
(write_callsite
, args
)
1589 redef class ASuperExpr
1592 var recv
= v
.frame
.arguments
.first
1594 for a
in self.n_args
.n_exprs
do
1596 if i
== null then return null
1600 var callsite
= self.callsite
1601 if callsite
!= null then
1602 # Add additionnals arguments for the super init call
1603 if args
.length
== 1 then
1604 for i
in [0..callsite
.msignature
.arity
[ do
1605 args
.add
(v
.frame
.arguments
[i
+1])
1609 var res
= v
.callsite
(callsite
, args
)
1613 if args
.length
== 1 then
1614 args
= v
.frame
.arguments
1617 # stantard call-next-method
1618 var mpropdef
= self.mpropdef
1619 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1620 var res
= v
.call_without_varargs
(mpropdef
, args
)
1625 redef class ANewExpr
1628 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1629 var recv
: Instance = new MutableInstance(mtype
)
1630 v
.init_instance
(recv
)
1632 for a
in self.n_args
.n_exprs
do
1634 if i
== null then return null
1637 var res2
= v
.callsite
(callsite
, args
)
1638 if res2
!= null then
1639 #self.debug("got {res2} from {mproperty}. drop {recv}")
1646 redef class AAttrExpr
1649 var recv
= v
.expr
(self.n_expr
)
1650 if recv
== null then return null
1651 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1652 var mproperty
= self.mproperty
.as(not null)
1653 return v
.read_attribute
(mproperty
, recv
)
1657 redef class AAttrAssignExpr
1660 var recv
= v
.expr
(self.n_expr
)
1661 if recv
== null then return
1662 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1663 var i
= v
.expr
(self.n_value
)
1664 if i
== null then return
1665 var mproperty
= self.mproperty
.as(not null)
1666 v
.write_attribute
(mproperty
, recv
, i
)
1670 redef class AAttrReassignExpr
1673 var recv
= v
.expr
(self.n_expr
)
1674 if recv
== null then return
1675 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1676 var value
= v
.expr
(self.n_value
)
1677 if value
== null then return
1678 var mproperty
= self.mproperty
.as(not null)
1679 var attr
= v
.read_attribute
(mproperty
, recv
)
1680 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
1682 v
.write_attribute
(mproperty
, recv
, res
)
1686 redef class AIssetAttrExpr
1689 var recv
= v
.expr
(self.n_expr
)
1690 if recv
== null then return null
1691 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1692 var mproperty
= self.mproperty
.as(not null)
1693 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
1697 redef class ADebugTypeExpr