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 private import parser
::tables
25 redef class ToolContext
26 # --discover-call-trace
27 var opt_discover_call_trace
: OptionBool = new OptionBool("Trace calls of the first invocation of a method", "--discover-call-trace")
32 self.option_context
.add_option
(self.opt_discover_call_trace
)
36 redef class ModelBuilder
37 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
38 # `arguments` are the command-line arguments in order
40 # 1. the AST is fully loaded.
41 # 2. the model is fully built.
42 # 3. the instructions are fully analysed.
43 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
46 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
48 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
49 interpreter
.start
(mainmodule
)
52 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
56 # The visitor that interprets the Nit Program by walking on the AST
57 class NaiveInterpreter
58 # The modelbuilder that know the AST and its associations with the model
59 var modelbuilder
: ModelBuilder
61 # The main moduleof the program (used to lookup methoda
62 var mainmodule
: MModule
64 # The command line arguments of the interpreted program
65 # arguments.first is the program name
66 # arguments[1] is the first argument
67 var arguments
: Array[String]
69 var mainobj
: nullable Instance
71 init(modelbuilder
: ModelBuilder, mainmodule
: MModule, arguments
: Array[String])
73 self.modelbuilder
= modelbuilder
74 self.mainmodule
= mainmodule
75 self.arguments
= arguments
76 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
77 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
78 self.null_instance
= new MutableInstance(mainmodule
.model
.null_type
)
81 # Starts the interpreter on the main module of a program
82 fun start
(mainmodule
: MModule) do
83 var interpreter
= self
84 var sys_type
= mainmodule
.sys_type
85 if sys_type
== null then return # no class Sys
86 var mainobj
= new MutableInstance(sys_type
)
87 interpreter
.mainobj
= mainobj
88 interpreter
.init_instance
(mainobj
)
89 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
90 if initprop
!= null then
91 interpreter
.send
(initprop
, [mainobj
])
93 var mainprop
= mainmodule
.try_get_primitive_method
("run", sys_type
.mclass
) or else
94 mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
95 if mainprop
!= null then
96 interpreter
.send
(mainprop
, [mainobj
])
100 # Subtype test in the context of the mainmodule
101 fun is_subtype
(sub
, sup
: MType): Bool
103 return sub
.is_subtype
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType), sup
)
106 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
108 assert recv
isa MClassType
109 return self.modelbuilder
.force_get_primitive_method
(self.frame
.current_node
, name
, recv
.mclass
, self.mainmodule
)
112 # Is a return executed?
113 # Set this mark to skip the evaluation until the end of the specified method frame
114 var returnmark
: nullable Frame = null
116 # Is a break executed?
117 # Set this mark to skip the evaluation until a labeled statement catch it with `is_break`
118 var breakmark
: nullable EscapeMark = null
120 # Is a continue executed?
121 # Set this mark to skip the evaluation until a labeled statement catch it with `is_continue`
122 var continuemark
: nullable EscapeMark = null
124 # Is a return or a break or a continue executed?
125 # Use this function to know if you must skip the evaluation of statements
126 fun is_escaping
: Bool do return returnmark
!= null or breakmark
!= null or continuemark
!= null
128 # The value associated with the current return/break/continue, if any.
129 # Set the value when you set a escapemark.
130 # Read the value when you catch a mark or reach the end of a method
131 var escapevalue
: nullable Instance = null
133 # If there is a break and is associated with `escapemark`, then return true an clear the mark.
134 # If there is no break or if `escapemark` is null then return false.
135 # Use this function to catch a potential break.
136 fun is_break
(escapemark
: nullable EscapeMark): Bool
138 if escapemark
!= null and self.breakmark
== escapemark
then
139 self.breakmark
= null
146 # If there is a continue and is associated with `escapemark`, then return true an clear the mark.
147 # If there is no continue or if `escapemark` is null then return false.
148 # Use this function to catch a potential continue.
149 fun is_continue
(escapemark
: nullable EscapeMark): Bool
151 if escapemark
!= null and self.continuemark
== escapemark
then
152 self.continuemark
= null
159 # Evaluate `n` as an expression in the current context.
160 # Return the value of the expression.
161 # If `n` cannot be evaluated, then aborts.
162 fun expr
(n
: AExpr): nullable Instance
164 var frame
= self.frame
165 var old
= frame
.current_node
166 frame
.current_node
= n
167 #n.debug("IN Execute expr")
169 if i
== null and not self.is_escaping
then
170 n
.debug
("inconsitance: no value and not escaping.")
172 var implicit_cast_to
= n
.implicit_cast_to
173 if implicit_cast_to
!= null then
174 var mtype
= self.unanchor_type
(implicit_cast_to
)
175 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
178 #n.debug("OUT Execute expr: value is {i}")
179 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
180 frame
.current_node
= old
184 # Evaluate `n` as a statement in the current context.
185 # Do nothing if `n` is null.
186 # If `n` cannot be evaluated, then aborts.
187 fun stmt
(n
: nullable AExpr)
190 var frame
= self.frame
191 var old
= frame
.current_node
192 frame
.current_node
= n
193 #n.debug("Execute stmt")
195 frame
.current_node
= old
199 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
200 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
202 # Return the boolean instance associated with `val`.
203 fun bool_instance
(val
: Bool): Instance
205 if val
then return self.true_instance
else return self.false_instance
208 # Return the integer instance associated with `val`.
209 fun int_instance
(val
: Int): Instance
211 var ic
= self.mainmodule
.get_primitive_class
("Int")
212 return new PrimitiveInstance[Int](ic
.mclass_type
, val
)
215 # Return the char instance associated with `val`.
216 fun char_instance
(val
: Char): Instance
218 var ic
= self.mainmodule
.get_primitive_class
("Char")
219 return new PrimitiveInstance[Char](ic
.mclass_type
, val
)
222 # Return the float instance associated with `val`.
223 fun float_instance
(val
: Float): Instance
225 var ic
= self.mainmodule
.get_primitive_class
("Float")
226 return new PrimitiveInstance[Float](ic
.mclass_type
, val
)
229 # The unique intance of the `true` value.
230 var true_instance
: Instance
232 # The unique intance of the `false` value.
233 var false_instance
: Instance
235 # The unique intance of the `null` value.
236 var null_instance
: Instance
238 # Return a new array made of `values`.
239 # The dynamic type of the result is Array[elttype].
240 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
242 assert not elttype
.need_anchor
243 var nat
= new PrimitiveInstance[Array[Instance]](self.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([elttype
]), values
)
244 var mtype
= self.mainmodule
.get_primitive_class
("Array").get_mtype
([elttype
])
245 var res
= new MutableInstance(mtype
)
246 self.init_instance
(res
)
247 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
251 fun value_instance
(object
: Object): Instance
253 if object
isa Int then
254 return int_instance
(object
)
255 else if object
isa Bool then
256 return bool_instance
(object
)
257 else if object
isa String then
258 return string_instance
(object
)
264 # Return a new native string initialized with `txt`
265 fun native_string_instance
(txt
: String): Instance
267 var val
= new FlatBuffer.from
(txt
)
269 var ic
= self.mainmodule
.get_primitive_class
("NativeString")
270 return new PrimitiveInstance[Buffer](ic
.mclass_type
, val
)
273 # Return a new String instance for `txt`
274 fun string_instance
(txt
: String): Instance
276 var nat
= native_string_instance
(txt
)
277 var res
= self.send
(self.force_get_primitive_method
("to_s_with_length", nat
.mtype
), [nat
, self.int_instance
(txt
.length
)])
282 # The current frame used to store local variables of the current method executed
283 fun frame
: Frame do return frames
.first
285 # The stack of all frames. The first one is the current one.
286 var frames
: List[Frame] = new List[Frame]
288 # Return a stack stace. One line per function
289 fun stack_trace
: String
291 var b
= new FlatBuffer
292 b
.append
(",---- Stack trace -- - - -\n")
294 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
296 b
.append
("`------------------- - - -")
300 # Exit the program with a message
301 fun fatal
(message
: String)
303 if frames
.is_empty
then
306 self.frame
.current_node
.fatal
(self, message
)
311 # Debug on the current node
312 fun debug
(message
: String)
314 if frames
.is_empty
then
317 self.frame
.current_node
.debug
(message
)
321 # Retrieve the value of the variable in the current frame
322 fun read_variable
(v
: Variable): Instance
328 # Assign the value of the variable in the current frame
329 fun write_variable
(v
: Variable, value
: Instance)
335 # Store known method, used to trace methods as thez are reached
336 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
338 # Common code for calls to injected methods and normal methods
339 fun call_commons
(mpropdef
: MMethodDef, args
: Array[Instance]): Array[Instance]
341 var vararg_rank
= mpropdef
.msignature
.vararg_rank
342 if vararg_rank
>= 0 then
343 assert args
.length
>= mpropdef
.msignature
.arity
+ 1 # because of self
345 args
= new Array[Instance]
347 args
.add
(rawargs
.first
) # recv
349 for i
in [0..vararg_rank
[ do
350 args
.add
(rawargs
[i
+1])
353 var vararg_lastrank
= vararg_rank
+ rawargs
.length-1-mpropdef
.msignature
.arity
354 var vararg
= new Array[Instance]
355 for i
in [vararg_rank
..vararg_lastrank
] do
356 vararg
.add
(rawargs
[i
+1])
358 # FIXME: its it to late to determine the vararg type, this should have been done during a previous analysis
359 var elttype
= mpropdef
.msignature
.mparameters
[vararg_rank
].mtype
.anchor_to
(self.mainmodule
, args
.first
.mtype
.as(MClassType))
360 args
.add
(self.array_instance
(vararg
, elttype
))
362 for i
in [vararg_lastrank
+1..rawargs
.length-1
[ do
363 args
.add
(rawargs
[i
+1])
369 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
370 # Return a falue if `mpropdef` is a function, or null if it is a procedure.
371 # The call is direct/static. There is no message-seding/late-binding.
372 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
374 args
= call_commons
(mpropdef
, args
)
375 return call_without_varargs
(mpropdef
, args
)
378 # Common code to call and this function
380 # Call only executes the variadic part, this avoids
381 # double encapsulation of variadic parameters into an Array
382 fun call_without_varargs
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
384 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
385 self.discover_call_trace
.add mpropdef
386 self.debug
("Discovered {mpropdef}")
388 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
390 # Look for the AST node that implements the property
391 var mproperty
= mpropdef
.mproperty
392 var val
= mpropdef
.constant_value
393 if self.modelbuilder
.mpropdef2npropdef
.has_key
(mpropdef
) then
394 var npropdef
= self.modelbuilder
.mpropdef2npropdef
[mpropdef
]
395 self.parameter_check
(npropdef
, mpropdef
, args
)
396 return npropdef
.call
(self, mpropdef
, args
)
397 else if mproperty
.name
== "init" then
398 var nclassdef
= self.modelbuilder
.mclassdef2nclassdef
[mpropdef
.mclassdef
]
399 self.parameter_check
(nclassdef
, mpropdef
, args
)
400 return nclassdef
.call
(self, mpropdef
, args
)
401 else if val
!= null then
402 return value_instance
(val
)
404 fatal
("Fatal Error: method {mpropdef} not found in the AST")
409 # Generate type checks in the C code to check covariant parameters
410 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
412 var msignature
= mpropdef
.msignature
413 for i
in [0..msignature
.arity
[ do
414 # skip test for vararg since the array is instantiated with the correct polymorphic type
415 if msignature
.vararg_rank
== i
then continue
417 # skip if the cast is not required
418 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
419 if not origmtype
.need_anchor
then continue
421 # get the parameter type
422 var mtype
= msignature
.mparameters
[i
].mtype
423 var anchor
= args
.first
.mtype
.as(MClassType)
424 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
425 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
426 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
431 # Common code for runtime injected calls and normal calls
432 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
434 if mtype
isa MNullType then
435 if mproperty
.name
== "==" then
436 return self.bool_instance
(args
[0] == args
[1])
437 else if mproperty
.name
== "!=" then
438 return self.bool_instance
(args
[0] != args
[1])
440 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
441 fatal
("Receiver is null")
446 # Execute a full `callsite` for given `args`
447 # Use this method, instead of `send` to execute and control the aditionnal behavior of the call-sites
448 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
450 var initializers
= callsite
.mpropdef
.initializers
451 if not initializers
.is_empty
then
452 var recv
= arguments
.first
454 for p
in initializers
do
455 if p
isa MMethod then
457 for x
in p
.intro
.msignature
.mparameters
do
458 args
.add arguments
[i
]
462 else if p
isa MAttribute then
463 assert recv
isa MutableInstance
464 recv
.attributes
[p
] = arguments
[i
]
468 assert i
== arguments
.length
470 return send
(callsite
.mproperty
, [recv
])
472 return send
(callsite
.mproperty
, arguments
)
475 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
476 # Return a falue if `mproperty` is a function, or null if it is a procedure.
477 # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
478 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
480 var recv
= args
.first
481 var mtype
= recv
.mtype
482 var ret
= send_commons
(mproperty
, args
, mtype
)
483 if ret
!= null then return ret
484 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
485 return self.call
(propdef
, args
)
488 # Read the attribute `mproperty` of an instance `recv` and return its value.
489 # If the attribute in not yet initialized, then aborts with an error message.
490 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
492 assert recv
isa MutableInstance
493 if not recv
.attributes
.has_key
(mproperty
) then
494 fatal
("Uninitialized attribute {mproperty.name}")
497 return recv
.attributes
[mproperty
]
500 # Replace in `recv` the value of the attribute `mproperty` by `value`
501 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
503 assert recv
isa MutableInstance
504 recv
.attributes
[mproperty
] = value
507 # Is the attribute `mproperty` initialized the instance `recv`?
508 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
510 assert recv
isa MutableInstance
511 return recv
.attributes
.has_key
(mproperty
)
514 # Collect attributes of a type in the order of their init
515 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
517 var cache
= self.collect_attr_propdef_cache
518 if cache
.has_key
(mtype
) then return cache
[mtype
]
520 var res
= new Array[AAttrPropdef]
521 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
522 self.mainmodule
.linearize_mclassdefs
(cds
)
524 if not self.modelbuilder
.mclassdef2nclassdef
.has_key
(cd
) then continue
525 var n
= self.modelbuilder
.mclassdef2nclassdef
[cd
]
526 for npropdef
in n
.n_propdefs
do
527 if npropdef
isa AAttrPropdef then
537 var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
539 # Fill the initial values of the newly created instance `recv`.
540 # `recv.mtype` is used to know what must be filled.
541 fun init_instance
(recv
: Instance)
543 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
544 npropdef
.init_expr
(self, recv
)
548 # This function determine the correct type according the reciever of the current definition (self).
549 fun unanchor_type
(mtype
: MType): MType
551 return mtype
.anchor_to
(self.mainmodule
, self.frame
.arguments
.first
.mtype
.as(MClassType))
554 # Placebo instance used to mark internal error result when `null` already have a meaning.
555 # TODO: replace with multiple return or something better
556 var error_instance
= new MutableInstance(modelbuilder
.model
.null_type
) is lazy
559 # An instance represents a value of the executed program.
560 abstract class Instance
561 # The dynamic type of the instance
562 # ASSERT: not self.mtype.is_anchored
565 # return true if the instance is the true value.
566 # return false if the instance is the true value.
568 fun is_true
: Bool do abort
570 # Return true if `self` IS `o` (using the Nit semantic of is)
571 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
573 # Human readable object identity "Type#number"
574 redef fun to_s
do return "{mtype}"
576 # Return the integer value if the instance is an integer.
578 fun to_i
: Int do abort
580 # Return the integer value if the instance is a float.
582 fun to_f
: Float do abort
584 # The real value encapsulated if the instance is primitive.
586 fun val
: Object do abort
589 # A instance with attribute (standards objects)
590 class MutableInstance
593 # The values of the attributes
594 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
597 # Special instance to handle primitives values (int, bool, etc.)
598 # The trick it just to encapsulate the <<real>> value
599 class PrimitiveInstance[E
: Object]
602 # The real value encapsulated
605 init(mtype
: MType, val
: E
)
613 if val
== true then return true
614 if val
== false then return false
620 if not o
isa PrimitiveInstance[Object] then return false
621 return self.val
== o
.val
626 if not o
isa PrimitiveInstance[Object] then return false
627 return self.val
.is_same_instance
(o
.val
)
630 redef fun to_s
do return "{mtype}#{val.object_id}({val})"
632 redef fun to_i
do return val
.as(Int)
634 redef fun to_f
do return val
.as(Float)
637 # Information about local variables in a running method
639 # The current visited node
640 # The node is stored by frame to keep a stack trace
641 var current_node
: ANode
642 # The executed property.
643 # A Method in case of a call, an attribute in case of a default initialization.
644 var mpropdef
: MPropDef
645 # Arguments of the method (the first is the receiver)
646 var arguments
: Array[Instance]
647 # Mapping between a variable and the current value
648 private var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
652 # Aborts the program with a message
653 # `v` is used to know if a colored message is displayed or not
654 fun fatal
(v
: NaiveInterpreter, message
: String)
656 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
657 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
659 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
660 sys
.stderr
.write
(v
.stack_trace
)
661 sys
.stderr
.write
("\n")
668 # Execute a `mpropdef` associated with the current node.
669 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
671 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
676 redef class AMethPropdef
679 redef fun call
(v
, mpropdef
, args
)
681 var f
= new Frame(self, self.mpropdef
.as(not null), args
)
682 var res
= call_commons
(v
, mpropdef
, args
, f
)
684 if v
.returnmark
== f
then
693 private fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
697 for i
in [0..mpropdef
.msignature
.arity
[ do
698 var variable
= self.n_signature
.n_params
[i
].variable
699 assert variable
!= null
700 v
.write_variable
(variable
, arguments
[i
+1])
703 if mpropdef
.is_abstract
then
704 v
.fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{arguments.first.mtype}`")
708 # Call the implicit super-init
709 var auto_super_inits
= self.auto_super_inits
710 if auto_super_inits
!= null then
711 var args
= [arguments
.first
]
712 for auto_super_init
in auto_super_inits
do
714 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
715 args
.add
(arguments
[i
])
717 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
718 v
.callsite
(auto_super_init
, args
)
721 if auto_super_call
then
722 # standard call-next-method
723 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
724 v
.call_without_varargs
(superpd
, arguments
)
727 if mpropdef
.is_intern
or mpropdef
.is_extern
then
728 var res
= intern_call
(v
, mpropdef
, arguments
)
729 if res
!= v
.error_instance
then return res
732 if n_block
!= null then
737 if mpropdef
.is_intern
then
738 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
739 else if mpropdef
.is_extern
then
740 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
742 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
747 # Interprets a intern or a shortcut extern method.
748 # Returns the result for a function, `null` for a procedure, or `error_instance` if the method is unknown.
749 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
751 var pname
= mpropdef
.mproperty
.name
752 var cname
= mpropdef
.mclassdef
.mclass
.name
753 if pname
== "output" then
754 var recv
= args
.first
757 else if pname
== "object_id" then
758 var recv
= args
.first
759 if recv
isa PrimitiveInstance[Object] then
760 return v
.int_instance
(recv
.val
.object_id
)
762 return v
.int_instance
(recv
.object_id
)
764 else if pname
== "output_class_name" then
765 var recv
= args
.first
768 else if pname
== "native_class_name" then
769 var recv
= args
.first
770 var txt
= recv
.mtype
.to_s
771 return v
.native_string_instance
(txt
)
772 else if pname
== "==" then
773 # == is correclt redefined for instances
774 return v
.bool_instance
(args
[0] == args
[1])
775 else if pname
== "!=" then
776 return v
.bool_instance
(args
[0] != args
[1])
777 else if pname
== "is_same_type" then
778 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
779 else if pname
== "is_same_instance" then
780 return v
.bool_instance
(args
[1] != null and args
[0].eq_is
(args
[1]))
781 else if pname
== "exit" then
784 else if pname
== "sys" then
786 else if cname
== "Int" then
787 var recvval
= args
[0].to_i
788 if pname
== "unary -" then
789 return v
.int_instance
(-args
[0].to_i
)
790 else if pname
== "+" then
791 return v
.int_instance
(args
[0].to_i
+ args
[1].to_i
)
792 else if pname
== "-" then
793 return v
.int_instance
(args
[0].to_i
- args
[1].to_i
)
794 else if pname
== "*" then
795 return v
.int_instance
(args
[0].to_i
* args
[1].to_i
)
796 else if pname
== "%" then
797 return v
.int_instance
(args
[0].to_i
% args
[1].to_i
)
798 else if pname
== "/" then
799 return v
.int_instance
(args
[0].to_i
/ args
[1].to_i
)
800 else if pname
== "<" then
801 return v
.bool_instance
(args
[0].to_i
< args
[1].to_i
)
802 else if pname
== ">" then
803 return v
.bool_instance
(args
[0].to_i
> args
[1].to_i
)
804 else if pname
== "<=" then
805 return v
.bool_instance
(args
[0].to_i
<= args
[1].to_i
)
806 else if pname
== ">=" then
807 return v
.bool_instance
(args
[0].to_i
>= args
[1].to_i
)
808 else if pname
== "<=>" then
809 return v
.int_instance
(args
[0].to_i
<=> args
[1].to_i
)
810 else if pname
== "ascii" then
811 return v
.char_instance
(args
[0].to_i
.ascii
)
812 else if pname
== "to_f" then
813 return v
.float_instance
(args
[0].to_i
.to_f
)
814 else if pname
== "lshift" then
815 return v
.int_instance
(args
[0].to_i
.lshift
(args
[1].to_i
))
816 else if pname
== "rshift" then
817 return v
.int_instance
(args
[0].to_i
.rshift
(args
[1].to_i
))
818 else if pname
== "rand" then
819 var res
= recvval
.rand
820 return v
.int_instance
(res
)
821 else if pname
== "bin_and" then
822 return v
.int_instance
(args
[0].to_i
.bin_and
(args
[1].to_i
))
823 else if pname
== "bin_or" then
824 return v
.int_instance
(args
[0].to_i
.bin_or
(args
[1].to_i
))
825 else if pname
== "bin_xor" then
826 return v
.int_instance
(args
[0].to_i
.bin_xor
(args
[1].to_i
))
827 else if pname
== "bin_not" then
828 return v
.int_instance
(args
[0].to_i
.bin_not
)
829 else if pname
== "native_int_to_s" then
830 return v
.native_string_instance
(recvval
.to_s
)
831 else if pname
== "strerror_ext" then
832 return v
.native_string_instance
(recvval
.strerror
)
834 else if cname
== "Char" then
835 var recv
= args
[0].val
.as(Char)
836 if pname
== "ascii" then
837 return v
.int_instance
(recv
.ascii
)
838 else if pname
== "successor" then
839 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
840 else if pname
== "predecessor" then
841 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
842 else if pname
== "<" then
843 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
844 else if pname
== ">" then
845 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
846 else if pname
== "<=" then
847 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
848 else if pname
== ">=" then
849 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
850 else if pname
== "<=>" then
851 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
853 else if cname
== "Float" then
854 var recv
= args
[0].to_f
855 if pname
== "unary -" then
856 return v
.float_instance
(-recv
)
857 else if pname
== "+" then
858 return v
.float_instance
(recv
+ args
[1].to_f
)
859 else if pname
== "-" then
860 return v
.float_instance
(recv
- args
[1].to_f
)
861 else if pname
== "*" then
862 return v
.float_instance
(recv
* args
[1].to_f
)
863 else if pname
== "/" then
864 return v
.float_instance
(recv
/ args
[1].to_f
)
865 else if pname
== "<" then
866 return v
.bool_instance
(recv
< args
[1].to_f
)
867 else if pname
== ">" then
868 return v
.bool_instance
(recv
> args
[1].to_f
)
869 else if pname
== "<=" then
870 return v
.bool_instance
(recv
<= args
[1].to_f
)
871 else if pname
== ">=" then
872 return v
.bool_instance
(recv
>= args
[1].to_f
)
873 else if pname
== "to_i" then
874 return v
.int_instance
(recv
.to_i
)
875 else if pname
== "cos" then
876 return v
.float_instance
(args
[0].to_f
.cos
)
877 else if pname
== "sin" then
878 return v
.float_instance
(args
[0].to_f
.sin
)
879 else if pname
== "tan" then
880 return v
.float_instance
(args
[0].to_f
.tan
)
881 else if pname
== "acos" then
882 return v
.float_instance
(args
[0].to_f
.acos
)
883 else if pname
== "asin" then
884 return v
.float_instance
(args
[0].to_f
.asin
)
885 else if pname
== "atan" then
886 return v
.float_instance
(args
[0].to_f
.atan
)
887 else if pname
== "sqrt" then
888 return v
.float_instance
(args
[0].to_f
.sqrt
)
889 else if pname
== "exp" then
890 return v
.float_instance
(args
[0].to_f
.exp
)
891 else if pname
== "log" then
892 return v
.float_instance
(args
[0].to_f
.log
)
893 else if pname
== "pow" then
894 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
895 else if pname
== "rand" then
896 return v
.float_instance
(args
[0].to_f
.rand
)
897 else if pname
== "abs" then
898 return v
.float_instance
(args
[0].to_f
.abs
)
899 else if pname
== "hypot_with" then
900 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
901 else if pname
== "is_nan" then
902 return v
.bool_instance
(args
[0].to_f
.is_nan
)
903 else if pname
== "is_inf_extern" then
904 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
906 else if cname
== "NativeString" then
907 if pname
== "init" then
908 return v
.native_string_instance
("!" * args
[1].to_i
)
910 var recvval
= args
.first
.val
.as(Buffer)
911 if pname
== "[]" then
912 var arg1
= args
[1].to_i
913 if arg1
>= recvval
.length
or arg1
< 0 then
914 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
916 return v
.char_instance
(recvval
.chars
[arg1
])
917 else if pname
== "[]=" then
918 var arg1
= args
[1].to_i
919 if arg1
>= recvval
.length
or arg1
< 0 then
920 debug
("Illegal access on {recvval} for element {arg1}/{recvval.length}")
922 recvval
.chars
[arg1
] = args
[2].val
.as(Char)
924 else if pname
== "copy_to" then
925 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
926 var destval
= args
[1].val
.as(FlatBuffer)
927 var lenval
= args
[2].to_i
928 var fromval
= args
[3].to_i
929 var toval
= args
[4].to_i
931 debug
("Illegal access on {recvval} for element {fromval}/{recvval.length}")
933 if fromval
+ lenval
>= recvval
.length
then
934 debug
("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
937 debug
("Illegal access on {destval} for element {toval}/{destval.length}")
939 if toval
+ lenval
>= destval
.length
then
940 debug
("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
942 recvval
.as(FlatBuffer).copy
(fromval
, lenval
, destval
, toval
)
944 else if pname
== "atoi" then
945 return v
.int_instance
(recvval
.to_i
)
946 else if pname
== "file_exists" then
947 return v
.bool_instance
(recvval
.to_s
.file_exists
)
948 else if pname
== "file_mkdir" then
951 else if pname
== "file_chdir" then
954 else if pname
== "file_realpath" then
955 return v
.native_string_instance
(recvval
.to_s
.realpath
)
956 else if pname
== "get_environ" then
957 var txt
= recvval
.to_s
.environ
958 return v
.native_string_instance
(txt
)
959 else if pname
== "system" then
960 var res
= sys
.system
(recvval
.to_s
)
961 return v
.int_instance
(res
)
962 else if pname
== "atof" then
963 return v
.float_instance
(recvval
.to_f
)
965 else if pname
== "calloc_string" then
966 return v
.native_string_instance
("!" * args
[1].to_i
)
967 else if cname
== "NativeArray" then
968 if pname
== "init" then
969 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
970 return new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
972 var recvval
= args
.first
.val
.as(Array[Instance])
973 if pname
== "[]" then
974 if args
[1].to_i
>= recvval
.length
or args
[1].to_i
< 0 then
975 debug
("Illegal access on {recvval} for element {args[1].to_i}/{recvval.length}")
977 return recvval
[args
[1].to_i
]
978 else if pname
== "[]=" then
979 recvval
[args
[1].to_i
] = args
[2]
981 else if pname
== "length" then
982 return v
.int_instance
(recvval
.length
)
983 else if pname
== "copy_to" then
984 recvval
.copy
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
987 else if cname
== "NativeFile" then
988 if pname
== "native_stdout" then
989 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdout
)
990 else if pname
== "native_stdin" then
991 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stdin
)
992 else if pname
== "native_stderr" then
993 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, sys
.stderr
)
994 else if pname
== "io_open_read" then
995 var a1
= args
[1].val
.as(Buffer)
996 return new PrimitiveInstance[IStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new IFStream.open
(a1
.to_s
))
997 else if pname
== "io_open_write" then
998 var a1
= args
[1].val
.as(Buffer)
999 return new PrimitiveInstance[OStream](mpropdef
.mclassdef
.mclass
.mclass_type
, new OFStream.open
(a1
.to_s
))
1001 var recvval
= args
.first
.val
1002 if pname
== "io_write" then
1003 var a1
= args
[1].val
.as(Buffer)
1004 recvval
.as(OStream).write
(a1
.substring
(0, args
[2].to_i
).to_s
)
1006 else if pname
== "io_read" then
1007 var str
= recvval
.as(IStream).read
(args
[2].to_i
)
1008 var a1
= args
[1].val
.as(Buffer)
1009 new FlatBuffer.from
(str
).copy
(0, str
.length
, a1
.as(FlatBuffer), 0)
1010 return v
.int_instance
(str
.length
)
1011 else if pname
== "io_close" then
1012 recvval
.as(IOS).close
1013 return v
.int_instance
(0)
1014 else if pname
== "address_is_null" then
1015 return v
.false_instance
1017 else if pname
== "calloc_array" then
1018 var recvtype
= args
.first
.mtype
.as(MClassType)
1020 mtype
= recvtype
.supertype_to
(v
.mainmodule
, recvtype
, v
.mainmodule
.get_primitive_class
("ArrayCapable"))
1021 mtype
= mtype
.arguments
.first
1022 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
1023 return new PrimitiveInstance[Array[Instance]](v
.mainmodule
.get_primitive_class
("NativeArray").get_mtype
([mtype
]), val
)
1024 else if pname
== "native_argc" then
1025 return v
.int_instance
(v
.arguments
.length
)
1026 else if pname
== "native_argv" then
1027 var txt
= v
.arguments
[args
[1].to_i
]
1028 return v
.native_string_instance
(txt
)
1029 else if pname
== "native_argc" then
1030 return v
.int_instance
(v
.arguments
.length
)
1031 else if pname
== "native_argv" then
1032 var txt
= v
.arguments
[args
[1].to_i
]
1033 return v
.native_string_instance
(txt
)
1034 else if pname
== "get_time" then
1035 return v
.int_instance
(get_time
)
1036 else if pname
== "srand_from" then
1037 srand_from
(args
[1].to_i
)
1039 else if pname
== "atan2" then
1040 return v
.float_instance
(atan2
(args
[1].to_f
, args
[2].to_f
))
1041 else if pname
== "pi" then
1042 return v
.float_instance
(pi
)
1043 else if pname
== "lexer_goto" then
1044 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
1045 else if pname
== "lexer_accept" then
1046 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
1047 else if pname
== "parser_goto" then
1048 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
1049 else if pname
== "parser_action" then
1050 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
1051 else if pname
== "file_getcwd" then
1052 return v
.native_string_instance
(getcwd
)
1053 else if pname
== "errno" then
1054 return v
.int_instance
(sys
.errno
)
1055 else if pname
== "address_is_null" then
1056 return v
.false_instance
1058 return v
.error_instance
1062 redef class AbstractArray[E
]
1063 fun copy
(start
: Int, len
: Int, dest
: AbstractArray[E
], new_start
: Int)
1065 self.copy_to
(start
, len
, dest
, new_start
)
1069 redef class AAttrPropdef
1070 redef fun call
(v
, mpropdef
, args
)
1072 var recv
= args
.first
1073 assert recv
isa MutableInstance
1074 var attr
= self.mpropdef
.mproperty
1075 if mpropdef
== mreadpropdef
then
1076 assert args
.length
== 1
1077 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
1078 return evaluate_expr
(v
, recv
)
1079 else if mpropdef
== mwritepropdef
then
1080 assert args
.length
== 2
1081 v
.write_attribute
(attr
, recv
, args
[1])
1088 # Evaluate and set the default value of the attribute in `recv`
1089 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1091 if is_lazy
then return
1092 var nexpr
= self.n_expr
1093 if nexpr
!= null then
1094 evaluate_expr
(v
, recv
)
1097 var mtype
= self.mpropdef
.static_mtype
.as(not null)
1098 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1099 if mtype
isa MNullableType then
1100 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1104 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance): Instance
1106 assert recv
isa MutableInstance
1107 var nexpr
= self.n_expr
1108 assert nexpr
!= null
1109 var f
= new Frame(self, self.mpropdef
.as(not null), [recv
])
1111 var val
= v
.expr
(nexpr
)
1114 assert not v
.is_escaping
1115 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1120 redef class AClassdef
1121 # Execute an implicit `mpropdef` associated with the current node.
1122 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
1124 if mpropdef
.mproperty
.is_root_init
then
1125 assert args
.length
== 1
1126 if not mpropdef
.is_intro
then
1127 # standard call-next-method
1128 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, args
.first
.mtype
)
1129 v
.call_without_varargs
(superpd
, args
)
1139 # Evaluate the node as a possible expression.
1140 # Return a possible value
1141 # NOTE: Do not call this method directly, but use `v.expr`
1142 # This method is here to be implemented by subclasses.
1143 private fun expr
(v
: NaiveInterpreter): nullable Instance
1145 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1149 # Evaluate the node as a statement.
1150 # NOTE: Do not call this method directly, but use `v.stmt`
1151 # This method is here to be implemented by subclasses (no need to return something).
1152 private fun stmt
(v
: NaiveInterpreter)
1159 redef class ABlockExpr
1162 var last
= self.n_expr
.last
1163 for e
in self.n_expr
do
1164 if e
== last
then break
1166 if v
.is_escaping
then return null
1173 for e
in self.n_expr
do
1175 if v
.is_escaping
then return
1180 redef class AVardeclExpr
1183 var ne
= self.n_expr
1186 if i
== null then return
1187 v
.write_variable
(self.variable
.as(not null), i
)
1192 redef class AVarExpr
1195 return v
.read_variable
(self.variable
.as(not null))
1199 redef class AVarAssignExpr
1202 var i
= v
.expr
(self.n_value
)
1203 if i
== null then return null
1204 v
.write_variable
(self.variable
.as(not null), i
)
1209 redef class AVarReassignExpr
1212 var variable
= self.variable
.as(not null)
1213 var vari
= v
.read_variable
(variable
)
1214 var value
= v
.expr
(self.n_value
)
1215 if value
== null then return
1216 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1218 v
.write_variable
(variable
, res
)
1222 redef class ASelfExpr
1225 return v
.frame
.arguments
.first
1229 redef class AContinueExpr
1232 var ne
= self.n_expr
1235 if i
== null then return
1238 v
.continuemark
= self.escapemark
1242 redef class ABreakExpr
1245 var ne
= self.n_expr
1248 if i
== null then return
1251 v
.breakmark
= self.escapemark
1255 redef class AReturnExpr
1258 var ne
= self.n_expr
1261 if i
== null then return
1264 v
.returnmark
= v
.frame
1268 redef class AAbortExpr
1279 var cond
= v
.expr
(self.n_expr
)
1280 if cond
== null then return null
1281 if cond
.is_true
then
1282 return v
.expr
(self.n_then
.as(not null))
1284 return v
.expr
(self.n_else
.as(not null))
1290 var cond
= v
.expr
(self.n_expr
)
1291 if cond
== null then return
1292 if cond
.is_true
then
1300 redef class AIfexprExpr
1303 var cond
= v
.expr
(self.n_expr
)
1304 if cond
== null then return null
1305 if cond
.is_true
then
1306 return v
.expr
(self.n_then
)
1308 return v
.expr
(self.n_else
)
1316 v
.stmt
(self.n_block
)
1317 v
.is_break
(self.escapemark
) # Clear the break (if any)
1321 redef class AWhileExpr
1325 var cond
= v
.expr
(self.n_expr
)
1326 if cond
== null then return
1327 if not cond
.is_true
then return
1328 v
.stmt
(self.n_block
)
1329 if v
.is_break
(self.escapemark
) then return
1330 v
.is_continue
(self.escapemark
) # Clear the break
1331 if v
.is_escaping
then return
1336 redef class ALoopExpr
1340 v
.stmt
(self.n_block
)
1341 if v
.is_break
(self.escapemark
) then return
1342 v
.is_continue
(self.escapemark
) # Clear the break
1343 if v
.is_escaping
then return
1348 redef class AForExpr
1351 var col
= v
.expr
(self.n_expr
)
1352 if col
== null then return
1353 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1355 #self.debug("col {col}")
1356 var iter
= v
.callsite
(method_iterator
, [col
]).as(not null)
1357 #self.debug("iter {iter}")
1359 var isok
= v
.callsite
(method_is_ok
, [iter
]).as(not null)
1360 if not isok
.is_true
then break
1361 if self.variables
.length
== 1 then
1362 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1363 #self.debug("item {item}")
1364 v
.write_variable
(self.variables
.first
, item
)
1365 else if self.variables
.length
== 2 then
1366 var key
= v
.callsite
(method_key
, [iter
]).as(not null)
1367 v
.write_variable
(self.variables
[0], key
)
1368 var item
= v
.callsite
(method_item
, [iter
]).as(not null)
1369 v
.write_variable
(self.variables
[1], item
)
1373 v
.stmt
(self.n_block
)
1374 if v
.is_break
(self.escapemark
) then break
1375 v
.is_continue
(self.escapemark
) # Clear the break
1376 if v
.is_escaping
then break
1377 v
.callsite
(method_next
, [iter
])
1379 var method_finish
= self.method_finish
1380 if method_finish
!= null then
1381 v
.callsite
(method_finish
, [iter
])
1386 redef class AAssertExpr
1389 var cond
= v
.expr
(self.n_expr
)
1390 if cond
== null then return
1391 if not cond
.is_true
then
1393 if v
.is_escaping
then return
1396 fatal
(v
, "Assert '{nid.text}' failed")
1398 fatal
(v
, "Assert failed")
1408 var cond
= v
.expr
(self.n_expr
)
1409 if cond
== null then return null
1410 if cond
.is_true
then return cond
1411 return v
.expr
(self.n_expr2
)
1415 redef class AImpliesExpr
1418 var cond
= v
.expr
(self.n_expr
)
1419 if cond
== null then return null
1420 if not cond
.is_true
then return v
.true_instance
1421 return v
.expr
(self.n_expr2
)
1425 redef class AAndExpr
1428 var cond
= v
.expr
(self.n_expr
)
1429 if cond
== null then return null
1430 if not cond
.is_true
then return cond
1431 return v
.expr
(self.n_expr2
)
1435 redef class ANotExpr
1438 var cond
= v
.expr
(self.n_expr
)
1439 if cond
== null then return null
1440 return v
.bool_instance
(not cond
.is_true
)
1444 redef class AOrElseExpr
1447 var i
= v
.expr
(self.n_expr
)
1448 if i
== null then return null
1449 if i
!= v
.null_instance
then return i
1450 return v
.expr
(self.n_expr2
)
1454 redef class AIntExpr
1457 return v
.int_instance
(self.value
.as(not null))
1461 redef class AFloatExpr
1464 return v
.float_instance
(self.value
.as(not null))
1468 redef class ACharExpr
1471 return v
.char_instance
(self.value
.as(not null))
1475 redef class AArrayExpr
1478 var val
= new Array[Instance]
1479 for nexpr
in self.n_exprs
.n_exprs
do
1480 var i
= v
.expr
(nexpr
)
1481 if i
== null then return null
1484 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1485 var elttype
= mtype
.arguments
.first
1486 return v
.array_instance
(val
, elttype
)
1490 redef class AStringFormExpr
1493 var txt
= self.value
.as(not null)
1494 return v
.string_instance
(txt
)
1498 redef class ASuperstringExpr
1501 var array
= new Array[Instance]
1502 for nexpr
in n_exprs
do
1503 var i
= v
.expr
(nexpr
)
1504 if i
== null then return null
1507 var i
= v
.array_instance
(array
, v
.mainmodule
.get_primitive_class
("Object").mclass_type
)
1508 var res
= v
.send
(v
.force_get_primitive_method
("to_s", i
.mtype
), [i
])
1514 redef class ACrangeExpr
1517 var e1
= v
.expr
(self.n_expr
)
1518 if e1
== null then return null
1519 var e2
= v
.expr
(self.n_expr2
)
1520 if e2
== null then return null
1521 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1522 var res
= new MutableInstance(mtype
)
1523 v
.init_instance
(res
)
1524 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1529 redef class AOrangeExpr
1532 var e1
= v
.expr
(self.n_expr
)
1533 if e1
== null then return null
1534 var e2
= v
.expr
(self.n_expr2
)
1535 if e2
== null then return null
1536 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1537 var res
= new MutableInstance(mtype
)
1538 v
.init_instance
(res
)
1539 v
.callsite
(init_callsite
, [res
, e1
, e2
])
1544 redef class ATrueExpr
1547 return v
.bool_instance
(true)
1551 redef class AFalseExpr
1554 return v
.bool_instance
(false)
1558 redef class ANullExpr
1561 return v
.null_instance
1565 redef class AIsaExpr
1568 var i
= v
.expr
(self.n_expr
)
1569 if i
== null then return null
1570 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
1571 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
1575 redef class AAsCastExpr
1578 var i
= v
.expr
(self.n_expr
)
1579 if i
== null then return null
1580 var mtype
= self.mtype
.as(not null)
1581 var amtype
= v
.unanchor_type
(mtype
)
1582 if not v
.is_subtype
(i
.mtype
, amtype
) then
1583 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
1589 redef class AAsNotnullExpr
1592 var i
= v
.expr
(self.n_expr
)
1593 if i
== null then return null
1594 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1595 if i
.mtype
isa MNullType then
1596 fatal
(v
, "Cast failed")
1602 redef class AParExpr
1605 return v
.expr
(self.n_expr
)
1609 redef class AOnceExpr
1612 if v
.onces
.has_key
(self) then
1613 return v
.onces
[self]
1615 var res
= v
.expr
(self.n_expr
)
1616 if res
== null then return null
1623 redef class ASendExpr
1626 var recv
= v
.expr
(self.n_expr
)
1627 if recv
== null then return null
1629 for a
in self.raw_arguments
do
1631 if i
== null then return null
1635 var res
= v
.callsite
(callsite
, args
)
1640 redef class ASendReassignFormExpr
1643 var recv
= v
.expr
(self.n_expr
)
1644 if recv
== null then return
1646 for a
in self.raw_arguments
do
1648 if i
== null then return
1651 var value
= v
.expr
(self.n_value
)
1652 if value
== null then return
1654 var read
= v
.callsite
(callsite
, args
)
1657 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
1658 assert write
!= null
1662 v
.callsite
(write_callsite
, args
)
1666 redef class ASuperExpr
1669 var recv
= v
.frame
.arguments
.first
1671 for a
in self.n_args
.n_exprs
do
1673 if i
== null then return null
1677 var callsite
= self.callsite
1678 if callsite
!= null then
1679 # Add additionnals arguments for the super init call
1680 if args
.length
== 1 then
1681 for i
in [0..callsite
.msignature
.arity
[ do
1682 args
.add
(v
.frame
.arguments
[i
+1])
1686 var res
= v
.callsite
(callsite
, args
)
1690 if args
.length
== 1 then
1691 args
= v
.frame
.arguments
1694 # stantard call-next-method
1695 var mpropdef
= self.mpropdef
1696 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
1697 var res
= v
.call_without_varargs
(mpropdef
, args
)
1702 redef class ANewExpr
1705 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
1706 var recv
: Instance = new MutableInstance(mtype
)
1707 v
.init_instance
(recv
)
1709 for a
in self.n_args
.n_exprs
do
1711 if i
== null then return null
1714 var res2
= v
.callsite
(callsite
, args
)
1715 if res2
!= null then
1716 #self.debug("got {res2} from {mproperty}. drop {recv}")
1723 redef class AAttrExpr
1726 var recv
= v
.expr
(self.n_expr
)
1727 if recv
== null then return null
1728 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1729 var mproperty
= self.mproperty
.as(not null)
1730 return v
.read_attribute
(mproperty
, recv
)
1734 redef class AAttrAssignExpr
1737 var recv
= v
.expr
(self.n_expr
)
1738 if recv
== null then return
1739 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1740 var i
= v
.expr
(self.n_value
)
1741 if i
== null then return
1742 var mproperty
= self.mproperty
.as(not null)
1743 v
.write_attribute
(mproperty
, recv
, i
)
1747 redef class AAttrReassignExpr
1750 var recv
= v
.expr
(self.n_expr
)
1751 if recv
== null then return
1752 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1753 var value
= v
.expr
(self.n_value
)
1754 if value
== null then return
1755 var mproperty
= self.mproperty
.as(not null)
1756 var attr
= v
.read_attribute
(mproperty
, recv
)
1757 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
1759 v
.write_attribute
(mproperty
, recv
, res
)
1763 redef class AIssetAttrExpr
1766 var recv
= v
.expr
(self.n_expr
)
1767 if recv
== null then return null
1768 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1769 var mproperty
= self.mproperty
.as(not null)
1770 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
1774 redef class ADebugTypeExpr