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
24 import primitive_types
26 redef class ToolContext
27 # --discover-call-trace
28 var opt_discover_call_trace
= new OptionBool("Trace calls of the first invocation of methods", "--discover-call-trace")
33 self.option_context
.add_option
(self.opt_discover_call_trace
)
37 redef class ModelBuilder
38 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
39 # `arguments` are the command-line arguments in order
41 # 1. the AST is fully loaded.
42 # 2. the model is fully built.
43 # 3. the instructions are fully analysed.
44 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
47 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
49 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
50 interpreter
.start
(mainmodule
)
53 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
57 # The visitor that interprets the Nit Program by walking on the AST
58 class NaiveInterpreter
59 # The modelbuilder that know the AST and its associations with the model
60 var modelbuilder
: ModelBuilder
62 # The main module of the program (used to lookup method)
63 var mainmodule
: MModule
65 # The command line arguments of the interpreted program
66 # arguments.first is the program name
67 # arguments[1] is the first argument
68 var arguments
: Array[String]
70 # The main Sys instance
71 var mainobj
: nullable Instance is noinit
75 if mainmodule
.model
.get_mclasses_by_name
("Bool") != null then
76 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
77 init_instance_primitive
(self.true_instance
)
78 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
79 init_instance_primitive
(self.false_instance
)
81 self.null_instance
= new PrimitiveInstance[nullable Object](mainmodule
.model
.null_type
, null)
84 # Starts the interpreter on the main module of a program
85 fun start
(mainmodule
: MModule) do
86 var interpreter
= self
87 var sys_type
= mainmodule
.sys_type
88 if sys_type
== null then return # no class Sys
89 var mainobj
= new MutableInstance(sys_type
)
90 interpreter
.mainobj
= mainobj
91 interpreter
.init_instance
(mainobj
)
92 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
93 if initprop
!= null then
94 interpreter
.send
(initprop
, [mainobj
])
96 var mainprop
= mainmodule
.try_get_primitive_method
("run", sys_type
.mclass
) or else
97 mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
98 if mainprop
!= null then
99 interpreter
.send
(mainprop
, [mainobj
])
103 # Subtype test in the context of the mainmodule
104 fun is_subtype
(sub
, sup
: MType): Bool
106 return sub
.is_subtype
(self.mainmodule
, current_receiver_class
, sup
)
109 # Get a primitive method in the context of the main module
110 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
112 assert recv
isa MClassType
113 return self.modelbuilder
.force_get_primitive_method
(current_node
, name
, recv
.mclass
, self.mainmodule
)
116 # Is a return, a break or a continue executed?
117 # Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
118 var escapemark
: nullable EscapeMark = null
120 # The count of `catch` blocs that have been encountered and can catch an abort
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 escapemark
!= 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/continue and is associated with `escapemark`, then return true and clear the mark.
133 # If there is no break/continue or if `escapemark` is null then return false.
134 # Use this function to catch a potential break/continue.
135 fun is_escape
(escapemark
: nullable EscapeMark): Bool
137 if escapemark
!= null and self.escapemark
== escapemark
then
138 self.escapemark
= null
145 # Evaluate `n` as an expression in the current context.
146 # Return the value of the expression.
147 # If `n` cannot be evaluated, then aborts.
148 fun expr
(n
: AExpr): nullable Instance
150 var frame
= self.frame
151 var old
= frame
.current_node
152 frame
.current_node
= n
153 #n.debug("IN Execute expr")
155 if i
== null and not self.is_escaping
then
156 n
.debug
("inconsitance: no value and not escaping.")
158 var implicit_cast_to
= n
.implicit_cast_to
159 if i
!= null and implicit_cast_to
!= null then
160 var mtype
= self.unanchor_type
(implicit_cast_to
)
161 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
164 #n.debug("OUT Execute expr: value is {i}")
165 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
166 frame
.current_node
= old
170 # Evaluate `n` as a statement in the current context.
171 # Do nothing if `n` is null.
172 # If `n` cannot be evaluated, then aborts.
173 fun stmt
(n
: nullable AExpr)
175 if n
== null then return
177 if n
.comprehension
!= null then
178 var comprehension
= frame
.comprehension
.as(not null)
180 if i
!= null then comprehension
.add
(i
)
184 var frame
= self.frame
185 var old
= frame
.current_node
186 frame
.current_node
= n
188 frame
.current_node
= old
191 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
192 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
194 # Return the boolean instance associated with `val`.
195 fun bool_instance
(val
: Bool): Instance
197 if val
then return self.true_instance
else return self.false_instance
200 # Return the integer instance associated with `val`.
201 fun int_instance
(val
: Int): Instance
203 var t
= mainmodule
.int_type
204 var instance
= new PrimitiveInstance[Int](t
, val
)
205 init_instance_primitive
(instance
)
209 # Return the byte instance associated with `val`.
210 fun byte_instance
(val
: Byte): Instance
212 var t
= mainmodule
.byte_type
213 var instance
= new PrimitiveInstance[Byte](t
, val
)
214 init_instance_primitive
(instance
)
218 # Return the int8 instance associated with `val`.
219 fun int8_instance
(val
: Int8): Instance
221 var t
= mainmodule
.int8_type
222 var instance
= new PrimitiveInstance[Int8](t
, val
)
223 init_instance_primitive
(instance
)
227 # Return the int16 instance associated with `val`.
228 fun int16_instance
(val
: Int16): Instance
230 var t
= mainmodule
.int16_type
231 var instance
= new PrimitiveInstance[Int16](t
, val
)
232 init_instance_primitive
(instance
)
236 # Return the uint16 instance associated with `val`.
237 fun uint16_instance
(val
: UInt16): Instance
239 var t
= mainmodule
.uint16_type
240 var instance
= new PrimitiveInstance[UInt16](t
, val
)
241 init_instance_primitive
(instance
)
245 # Return the int32 instance associated with `val`.
246 fun int32_instance
(val
: Int32): Instance
248 var t
= mainmodule
.int32_type
249 var instance
= new PrimitiveInstance[Int32](t
, val
)
250 init_instance_primitive
(instance
)
254 # Return the uint32 instance associated with `val`.
255 fun uint32_instance
(val
: UInt32): Instance
257 var t
= mainmodule
.uint32_type
258 var instance
= new PrimitiveInstance[UInt32](t
, val
)
259 init_instance_primitive
(instance
)
263 # Return the char instance associated with `val`.
264 fun char_instance
(val
: Char): Instance
266 var t
= mainmodule
.char_type
267 var instance
= new PrimitiveInstance[Char](t
, val
)
268 init_instance_primitive
(instance
)
272 # Return the float instance associated with `val`.
273 fun float_instance
(val
: Float): Instance
275 var t
= mainmodule
.float_type
276 var instance
= new PrimitiveInstance[Float](t
, val
)
277 init_instance_primitive
(instance
)
281 # The unique instance of the `true` value.
282 var true_instance
: Instance is noinit
284 # The unique instance of the `false` value.
285 var false_instance
: Instance is noinit
287 # The unique instance of the `null` value.
288 var null_instance
: Instance is noinit
290 # Return a new array made of `values`.
291 # The dynamic type of the result is Array[elttype].
292 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
294 assert not elttype
.need_anchor
295 var nat
= new PrimitiveInstance[Array[Instance]](mainmodule
.native_array_type
(elttype
), values
)
296 init_instance_primitive
(nat
)
297 var mtype
= mainmodule
.array_type
(elttype
)
298 var res
= new MutableInstance(mtype
)
299 self.init_instance
(res
)
300 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
304 # Return a instance associated to a primitive class
305 # Current primitive classes are `Int`, `Bool`, and `String`
306 fun value_instance
(object
: Object): Instance
308 if object
isa Int then
309 return int_instance
(object
)
310 else if object
isa Bool then
311 return bool_instance
(object
)
312 else if object
isa String then
313 return string_instance
(object
)
319 # Return a new native string initialized with `txt`
320 fun native_string_instance
(txt
: String): Instance
322 var instance
= native_string_instance_len
(txt
.bytelen
+1)
323 var val
= instance
.val
324 val
[txt
.bytelen
] = 0u8
325 txt
.to_cstring
.copy_to
(val
, txt
.bytelen
, 0, 0)
330 # Return a new native string initialized with `txt`
331 fun native_string_instance_from_ns
(txt
: NativeString, len
: Int): Instance
333 var instance
= native_string_instance_len
(len
)
334 var val
= instance
.val
335 txt
.copy_to
(val
, len
, 0, 0)
340 # Return a new native string initialized of `length`
341 fun native_string_instance_len
(length
: Int): PrimitiveInstance[NativeString]
343 var val
= new NativeString(length
)
345 var t
= mainmodule
.native_string_type
346 var instance
= new PrimitiveInstance[NativeString](t
, val
)
347 init_instance_primitive
(instance
)
351 # Return a new String instance for `txt`
352 fun string_instance
(txt
: String): Instance
354 var nat
= native_string_instance
(txt
)
355 var res
= self.send
(self.force_get_primitive_method
("to_s_full", nat
.mtype
), [nat
, self.int_instance
(txt
.bytelen
), self.int_instance
(txt
.length
)])
360 # The virtual type of the frames used in the execution engine
363 # The current frame used to store local variables of the current method executed
364 fun frame
: FRAME do return frames
.first
366 # The stack of all frames. The first one is the current one.
367 var frames
= new List[FRAME]
369 # Return a stack trace. One line per function
370 fun stack_trace
: String
372 var b
= new FlatBuffer
373 b
.append
(",---- Stack trace -- - - -\n")
375 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
377 b
.append
("`------------------- - - -")
381 # The current node, used to print errors, debug and stack-traces
382 fun current_node
: nullable ANode
384 if frames
.is_empty
then return null
385 return frames
.first
.current_node
388 # The dynamic type of the current `self`
389 fun current_receiver_class
: MClassType
391 return frames
.first
.arguments
.first
.mtype
.as(MClassType)
394 # Initialize the environment for a call and return a new Frame
395 # *`node` The AST node
396 # *`mpropdef` The corresponding mpropdef
397 # *`args` Arguments of the call
398 fun new_frame
(node
: ANode, mpropdef
: MPropDef, args
: Array[Instance]): FRAME
400 return new InterpreterFrame(node
, mpropdef
, args
)
403 # Exit the program with a message
404 fun fatal
(message
: String)
406 var node
= current_node
410 node
.fatal
(self, message
)
415 # Debug on the current node
416 fun debug
(message
: String)
418 var node
= current_node
426 # Retrieve the value of the variable in the current frame
427 fun read_variable
(v
: Variable): Instance
429 var f
= frames
.first
.as(InterpreterFrame)
433 # Assign the value of the variable in the current frame
434 fun write_variable
(v
: Variable, value
: Instance)
436 var f
= frames
.first
.as(InterpreterFrame)
440 # Store known methods, used to trace methods as they are reached
441 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
443 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
444 # This method is used to manage varargs in signatures and returns the real array
445 # of instances to use in the call.
446 # Return `null` if one of the evaluation of the arguments return null.
447 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: Instance, args
: SequenceRead[AExpr]): nullable Array[Instance]
449 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
450 var res
= new Array[Instance]
453 if msignature
.arity
== 0 then return res
456 assert args
.length
== msignature
.arity
else debug
("Expected {msignature.arity} args, got {args.length}")
458 var e
= self.expr
(ne
)
459 if e
== null then return null
465 # Eval in order of arguments, not parameters
466 var exprs
= new Array[Instance].with_capacity
(args
.length
)
468 var e
= self.expr
(ne
)
469 if e
== null then return null
474 # Fill `res` with the result of the evaluation according to the mapping
475 for i
in [0..msignature
.arity
[ do
476 var param
= msignature
.mparameters
[i
]
477 var j
= map
.map
.get_or_null
(i
)
480 res
.add
(null_instance
)
483 if param
.is_vararg
and args
[i
].vararg_decl
> 0 then
484 var vararg
= exprs
.sub
(j
, args
[i
].vararg_decl
)
485 var elttype
= param
.mtype
.anchor_to
(self.mainmodule
, recv
.mtype
.as(MClassType))
486 var arg
= self.array_instance
(vararg
, elttype
)
495 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
496 # Return a value if `mpropdef` is a function, or null if it is a procedure.
497 # The call is direct/static. There is no message-sending/late-binding.
498 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
500 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
501 self.discover_call_trace
.add mpropdef
502 self.debug
("Discovered {mpropdef}")
504 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
506 # Look for the AST node that implements the property
507 var val
= mpropdef
.constant_value
509 var node
= modelbuilder
.mpropdef2node
(mpropdef
)
510 if mpropdef
.is_abstract
then
512 self.frames
.unshift new_frame
(node
, mpropdef
, args
)
514 fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
518 if node
isa APropdef then
519 self.parameter_check
(node
, mpropdef
, args
)
520 return node
.call
(self, mpropdef
, args
)
521 else if node
isa AClassdef then
522 self.parameter_check
(node
, mpropdef
, args
)
523 return node
.call
(self, mpropdef
, args
)
524 else if node
!= null then
525 fatal
("Fatal Error: method {mpropdef} associated to unexpected AST node {node.location}")
527 else if val
!= null then
528 return value_instance
(val
)
530 fatal
("Fatal Error: method {mpropdef} not found in the AST")
535 # Execute type checks of covariant parameters
536 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
538 var msignature
= mpropdef
.msignature
.as(not null)
539 for i
in [0..msignature
.arity
[ do
540 var mp
= msignature
.mparameters
[i
]
542 # skip test for vararg since the array is instantiated with the correct polymorphic type
543 if mp
.is_vararg
then continue
545 # skip if the cast is not required
546 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
547 if not origmtype
.need_anchor
then continue
549 #print "{mpropdef}: {mpropdef.mproperty.intro.msignature.mparameters[i]}"
551 # get the parameter type
553 var anchor
= args
.first
.mtype
.as(MClassType)
554 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
555 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
556 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
561 # Common code for runtime injected calls and normal calls
562 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
564 if mtype
isa MNullType then
565 if mproperty
.name
== "==" or mproperty
.name
== "is_same_instance" then
566 return self.bool_instance
(args
[0] == args
[1])
567 else if mproperty
.name
== "!=" then
568 return self.bool_instance
(args
[0] != args
[1])
570 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
571 fatal
("Receiver is null")
576 # Execute a full `callsite` for given `args`
577 # Use this method, instead of `send` to execute and control the additional behavior of the call-sites
578 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
580 if callsite
== null then return null
581 var initializers
= callsite
.mpropdef
.initializers
582 if not initializers
.is_empty
then
583 var recv
= arguments
.first
585 for p
in initializers
do
586 if p
isa MMethod then
588 for x
in p
.intro
.msignature
.mparameters
do
589 args
.add arguments
[i
]
593 else if p
isa MAttribute then
594 assert recv
isa MutableInstance
595 write_attribute
(p
, recv
, arguments
[i
])
599 assert i
== arguments
.length
601 return send
(callsite
.mproperty
, [recv
])
603 return send
(callsite
.mproperty
, arguments
)
606 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
607 # Return a value if `mproperty` is a function, or null if it is a procedure.
608 # The call is polymorphic. There is a message-sending/late-binding according to the receiver (args[0]).
609 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
611 var recv
= args
.first
612 var mtype
= recv
.mtype
613 var ret
= send_commons
(mproperty
, args
, mtype
)
614 if ret
!= null then return ret
615 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
616 return self.call
(propdef
, args
)
619 # Read the attribute `mproperty` of an instance `recv` and return its value.
620 # If the attribute in not yet initialized, then aborts with an error message.
621 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
623 assert recv
isa MutableInstance
624 if not recv
.attributes
.has_key
(mproperty
) then
625 fatal
("Uninitialized attribute {mproperty.name}")
628 return recv
.attributes
[mproperty
]
631 # Replace in `recv` the value of the attribute `mproperty` by `value`
632 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
634 assert recv
isa MutableInstance
635 recv
.attributes
[mproperty
] = value
638 # Is the attribute `mproperty` initialized the instance `recv`?
639 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
641 assert recv
isa MutableInstance
642 return recv
.attributes
.has_key
(mproperty
)
645 # Collect attributes of a type in the order of their init
646 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
648 var cache
= self.collect_attr_propdef_cache
649 if cache
.has_key
(mtype
) then return cache
[mtype
]
651 var res
= new Array[AAttrPropdef]
652 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
653 self.mainmodule
.linearize_mclassdefs
(cds
)
655 res
.add_all
(modelbuilder
.collect_attr_propdef
(cd
))
662 private var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
664 # Fill the initial values of the newly created instance `recv`.
665 # `recv.mtype` is used to know what must be filled.
666 fun init_instance
(recv
: Instance)
668 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
669 npropdef
.init_expr
(self, recv
)
673 # A hook to initialize a `PrimitiveInstance`
674 fun init_instance_primitive
(recv
: Instance) do end
676 # This function determines the correct type according to the receiver of the current propdef (self).
677 fun unanchor_type
(mtype
: MType): MType
679 return mtype
.anchor_to
(self.mainmodule
, current_receiver_class
)
682 # Placebo instance used to mark internal error result when `null` already have a meaning.
683 # TODO: replace with multiple return or something better
684 var error_instance
= new MutableInstance(modelbuilder
.model
.null_type
) is lazy
687 # An instance represents a value of the executed program.
688 abstract class Instance
689 # The dynamic type of the instance
690 # ASSERT: not self.mtype.is_anchored
693 # return true if the instance is the true value.
694 # return false if the instance is the true value.
696 fun is_true
: Bool do abort
698 # Return true if `self` IS `o` (using the Nit semantic of is)
699 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
701 # Human readable object identity "Type#number"
702 redef fun to_s
do return "{mtype}"
704 # Return the integer value if the instance is an integer.
706 fun to_i
: Int do abort
708 # Return the integer value if the instance is a float.
710 fun to_f
: Float do abort
712 # Return the integer value if the instance is a byte.
714 fun to_b
: Byte do abort
716 # Return the integer value if the instance is a int8.
718 fun to_i8
: Int8 do abort
720 # Return the integer value if the instance is a int16.
722 fun to_i16
: Int16 do abort
724 # Return the integer value if the instance is a uint16.
726 fun to_u16
: UInt16 do abort
728 # Return the integer value if the instance is a int32.
730 fun to_i32
: Int32 do abort
732 # Return the integer value if the instance is a uint32.
734 fun to_u32
: UInt32 do abort
736 # The real value encapsulated if the instance is primitive.
738 fun val
: nullable Object do abort
741 # A instance with attribute (standards objects)
742 class MutableInstance
745 # The values of the attributes
746 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
749 # Special instance to handle primitives values (int, bool, etc.)
750 # The trick it just to encapsulate the <<real>> value
751 class PrimitiveInstance[E
]
754 # The real value encapsulated
759 if val
== true then return true
760 if val
== false then return false
766 if not o
isa PrimitiveInstance[nullable Object] then return false
767 return self.val
== o
.val
772 if not o
isa PrimitiveInstance[nullable Object] then return false
773 return self.val
.is_same_instance
(o
.val
)
776 redef fun to_s
do return "{mtype}#{val.object_id}({val or else "null"})"
778 redef fun to_i
do return val
.as(Int)
780 redef fun to_f
do return val
.as(Float)
782 redef fun to_b
do return val
.as(Byte)
784 redef fun to_i8
do return val
.as(Int8)
786 redef fun to_i16
do return val
.as(Int16)
788 redef fun to_u16
do return val
.as(UInt16)
790 redef fun to_i32
do return val
.as(Int32)
792 redef fun to_u32
do return val
.as(UInt32)
795 # Information about local variables in a running method
797 # The current visited node
798 # The node is stored by frame to keep a stack trace
799 var current_node
: ANode
800 # The executed property.
801 # A Method in case of a call, an attribute in case of a default initialization.
802 var mpropdef
: MPropDef
803 # Arguments of the method (the first is the receiver)
804 var arguments
: Array[Instance]
805 # Indicate if the expression has an array comprehension form
806 var comprehension
: nullable Array[Instance] = null
809 # Implementation of a Frame with a Hashmap to store local variables
810 class InterpreterFrame
813 # Mapping between a variable and the current value
814 private var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
818 # Aborts the program with a message
819 # `v` is used to know if a colored message is displayed or not
820 fun fatal
(v
: NaiveInterpreter, message
: String)
822 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
== true then
823 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
825 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
826 sys
.stderr
.write
(v
.stack_trace
)
827 sys
.stderr
.write
("\n")
834 # Execute a `mpropdef` associated with the current node.
835 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
837 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
842 redef class AMethPropdef
845 redef fun call
(v
, mpropdef
, args
)
847 var f
= v
.new_frame
(self, mpropdef
, args
)
848 var res
= call_commons
(v
, mpropdef
, args
, f
)
850 if v
.is_escape
(self.return_mark
) then
857 private fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
861 for i
in [0..mpropdef
.msignature
.arity
[ do
862 var variable
= self.n_signature
.n_params
[i
].variable
863 assert variable
!= null
864 v
.write_variable
(variable
, arguments
[i
+1])
867 # Call the implicit super-init
868 var auto_super_inits
= self.auto_super_inits
869 if auto_super_inits
!= null then
870 var args
= [arguments
.first
]
871 for auto_super_init
in auto_super_inits
do
873 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
874 args
.add
(arguments
[i
])
876 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
877 v
.callsite
(auto_super_init
, args
)
880 if auto_super_call
then
881 # standard call-next-method
882 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
883 v
.call
(superpd
, arguments
)
887 if mpropdef
.is_intern
or mpropdef
.is_extern
then
888 var res
= intern_call
(v
, mpropdef
, arguments
)
889 if res
!= v
.error_instance
then return res
892 if mpropdef
.is_extern
then
893 var res
= call_extern
(v
, mpropdef
, arguments
, f
)
894 if res
!= v
.error_instance
then return res
897 if n_block
!= null then
902 # Fail if nothing succeed
903 if mpropdef
.is_intern
then
904 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
905 else if mpropdef
.is_extern
then
906 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
908 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
913 # Call this extern method
914 protected fun call_extern
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
916 return v
.error_instance
919 # Interprets a intern or a shortcut extern method.
920 # Returns the result for a function, `null` for a procedure, or `error_instance` if the method is unknown.
921 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
923 var pname
= mpropdef
.mproperty
.name
924 var cname
= mpropdef
.mclassdef
.mclass
.name
925 if pname
== "output" then
926 var recv
= args
.first
929 else if pname
== "object_id" then
930 var recv
= args
.first
931 if recv
isa PrimitiveInstance[Object] then
932 return v
.int_instance
(recv
.val
.object_id
)
934 return v
.int_instance
(recv
.object_id
)
936 else if pname
== "output_class_name" then
937 var recv
= args
.first
940 else if pname
== "native_class_name" then
941 var recv
= args
.first
942 var txt
= recv
.mtype
.to_s
943 return v
.native_string_instance
(txt
)
944 else if pname
== "==" then
945 # == is correctly redefined for instances
946 return v
.bool_instance
(args
[0] == args
[1])
947 else if pname
== "!=" then
948 return v
.bool_instance
(args
[0] != args
[1])
949 else if pname
== "is_same_type" then
950 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
951 else if pname
== "is_same_instance" then
952 return v
.bool_instance
(args
[0].eq_is
(args
[1]))
953 else if pname
== "exit" then
956 else if pname
== "buffer_mode_full" then
957 return v
.int_instance
(sys
.buffer_mode_full
)
958 else if pname
== "buffer_mode_line" then
959 return v
.int_instance
(sys
.buffer_mode_line
)
960 else if pname
== "buffer_mode_none" then
961 return v
.int_instance
(sys
.buffer_mode_none
)
962 else if pname
== "sys" then
964 else if cname
== "Int" then
965 var recvval
= args
[0].to_i
966 if pname
== "unary -" then
967 return v
.int_instance
(-recvval
)
968 else if pname
== "unary +" then
970 else if pname
== "+" then
971 return v
.int_instance
(recvval
+ args
[1].to_i
)
972 else if pname
== "-" then
973 return v
.int_instance
(recvval
- args
[1].to_i
)
974 else if pname
== "*" then
975 return v
.int_instance
(recvval
* args
[1].to_i
)
976 else if pname
== "%" then
977 return v
.int_instance
(recvval
% args
[1].to_i
)
978 else if pname
== "/" then
979 return v
.int_instance
(recvval
/ args
[1].to_i
)
980 else if pname
== "<" then
981 return v
.bool_instance
(recvval
< args
[1].to_i
)
982 else if pname
== ">" then
983 return v
.bool_instance
(recvval
> args
[1].to_i
)
984 else if pname
== "<=" then
985 return v
.bool_instance
(recvval
<= args
[1].to_i
)
986 else if pname
== ">=" then
987 return v
.bool_instance
(recvval
>= args
[1].to_i
)
988 else if pname
== "<=>" then
989 return v
.int_instance
(recvval
<=> args
[1].to_i
)
990 else if pname
== "&" then
991 return v
.int_instance
(recvval
& args
[1].to_i
)
992 else if pname
== "|" then
993 return v
.int_instance
(recvval
| args
[1].to_i
)
994 else if pname
== "to_f" then
995 return v
.float_instance
(recvval
.to_f
)
996 else if pname
== "to_b" then
997 return v
.byte_instance
(recvval
.to_b
)
998 else if pname
== "<<" then
999 return v
.int_instance
(recvval
<< args
[1].to_i
)
1000 else if pname
== ">>" then
1001 return v
.int_instance
(recvval
>> args
[1].to_i
)
1002 else if pname
== "to_i8" then
1003 return v
.int8_instance
(recvval
.to_i8
)
1004 else if pname
== "to_i16" then
1005 return v
.int16_instance
(recvval
.to_i16
)
1006 else if pname
== "to_u16" then
1007 return v
.uint16_instance
(recvval
.to_u16
)
1008 else if pname
== "to_i32" then
1009 return v
.int32_instance
(recvval
.to_i32
)
1010 else if pname
== "to_u32" then
1011 return v
.uint32_instance
(recvval
.to_u32
)
1013 else if cname
== "Byte" then
1014 var recvval
= args
[0].to_b
1015 if pname
== "unary -" then
1016 return v
.byte_instance
(-recvval
)
1017 else if pname
== "unary +" then
1019 else if pname
== "+" then
1020 return v
.byte_instance
(recvval
+ args
[1].to_b
)
1021 else if pname
== "-" then
1022 return v
.byte_instance
(recvval
- args
[1].to_b
)
1023 else if pname
== "*" then
1024 return v
.byte_instance
(recvval
* args
[1].to_b
)
1025 else if pname
== "%" then
1026 return v
.byte_instance
(recvval
% args
[1].to_b
)
1027 else if pname
== "/" then
1028 return v
.byte_instance
(recvval
/ args
[1].to_b
)
1029 else if pname
== "<" then
1030 return v
.bool_instance
(recvval
< args
[1].to_b
)
1031 else if pname
== ">" then
1032 return v
.bool_instance
(recvval
> args
[1].to_b
)
1033 else if pname
== "<=" then
1034 return v
.bool_instance
(recvval
<= args
[1].to_b
)
1035 else if pname
== ">=" then
1036 return v
.bool_instance
(recvval
>= args
[1].to_b
)
1037 else if pname
== "<=>" then
1038 return v
.int_instance
(recvval
<=> args
[1].to_b
)
1039 else if pname
== "&" then
1040 return v
.byte_instance
(recvval
& args
[1].to_b
)
1041 else if pname
== "|" then
1042 return v
.byte_instance
(recvval
| args
[1].to_b
)
1043 else if pname
== "to_f" then
1044 return v
.float_instance
(recvval
.to_f
)
1045 else if pname
== "to_i" then
1046 return v
.int_instance
(recvval
.to_i
)
1047 else if pname
== "<<" then
1048 return v
.byte_instance
(recvval
<< args
[1].to_i
)
1049 else if pname
== ">>" then
1050 return v
.byte_instance
(recvval
>> args
[1].to_i
)
1051 else if pname
== "to_i8" then
1052 return v
.int8_instance
(recvval
.to_i8
)
1053 else if pname
== "to_i16" then
1054 return v
.int16_instance
(recvval
.to_i16
)
1055 else if pname
== "to_u16" then
1056 return v
.uint16_instance
(recvval
.to_u16
)
1057 else if pname
== "to_i32" then
1058 return v
.int32_instance
(recvval
.to_i32
)
1059 else if pname
== "to_u32" then
1060 return v
.uint32_instance
(recvval
.to_u32
)
1061 else if pname
== "byte_to_s_len" then
1062 return v
.int_instance
(recvval
.to_s
.length
)
1064 else if cname
== "Char" then
1065 var recv
= args
[0].val
.as(Char)
1066 if pname
== "successor" then
1067 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
1068 else if pname
== "predecessor" then
1069 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
1070 else if pname
== "<" then
1071 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
1072 else if pname
== ">" then
1073 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
1074 else if pname
== "<=" then
1075 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
1076 else if pname
== ">=" then
1077 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
1078 else if pname
== "<=>" then
1079 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
1081 else if cname
== "Float" then
1082 var recv
= args
[0].to_f
1083 if pname
== "unary -" then
1084 return v
.float_instance
(-recv
)
1085 else if pname
== "unary +" then
1087 else if pname
== "+" then
1088 return v
.float_instance
(recv
+ args
[1].to_f
)
1089 else if pname
== "-" then
1090 return v
.float_instance
(recv
- args
[1].to_f
)
1091 else if pname
== "*" then
1092 return v
.float_instance
(recv
* args
[1].to_f
)
1093 else if pname
== "/" then
1094 return v
.float_instance
(recv
/ args
[1].to_f
)
1095 else if pname
== "<" then
1096 return v
.bool_instance
(recv
< args
[1].to_f
)
1097 else if pname
== ">" then
1098 return v
.bool_instance
(recv
> args
[1].to_f
)
1099 else if pname
== "<=" then
1100 return v
.bool_instance
(recv
<= args
[1].to_f
)
1101 else if pname
== ">=" then
1102 return v
.bool_instance
(recv
>= args
[1].to_f
)
1103 else if pname
== "to_i" then
1104 return v
.int_instance
(recv
.to_i
)
1105 else if pname
== "to_b" then
1106 return v
.byte_instance
(recv
.to_b
)
1107 else if pname
== "to_i8" then
1108 return v
.int8_instance
(recv
.to_i8
)
1109 else if pname
== "to_i16" then
1110 return v
.int16_instance
(recv
.to_i16
)
1111 else if pname
== "to_u16" then
1112 return v
.uint16_instance
(recv
.to_u16
)
1113 else if pname
== "to_i32" then
1114 return v
.int32_instance
(recv
.to_i32
)
1115 else if pname
== "to_u32" then
1116 return v
.uint32_instance
(recv
.to_u32
)
1117 else if pname
== "cos" then
1118 return v
.float_instance
(args
[0].to_f
.cos
)
1119 else if pname
== "sin" then
1120 return v
.float_instance
(args
[0].to_f
.sin
)
1121 else if pname
== "tan" then
1122 return v
.float_instance
(args
[0].to_f
.tan
)
1123 else if pname
== "acos" then
1124 return v
.float_instance
(args
[0].to_f
.acos
)
1125 else if pname
== "asin" then
1126 return v
.float_instance
(args
[0].to_f
.asin
)
1127 else if pname
== "atan" then
1128 return v
.float_instance
(args
[0].to_f
.atan
)
1129 else if pname
== "sqrt" then
1130 return v
.float_instance
(args
[0].to_f
.sqrt
)
1131 else if pname
== "exp" then
1132 return v
.float_instance
(args
[0].to_f
.exp
)
1133 else if pname
== "log" then
1134 return v
.float_instance
(args
[0].to_f
.log
)
1135 else if pname
== "pow" then
1136 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
1137 else if pname
== "abs" then
1138 return v
.float_instance
(args
[0].to_f
.abs
)
1139 else if pname
== "hypot_with" then
1140 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
1141 else if pname
== "is_nan" then
1142 return v
.bool_instance
(args
[0].to_f
.is_nan
)
1143 else if pname
== "is_inf_extern" then
1144 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
1145 else if pname
== "round" then
1146 return v
.float_instance
(args
[0].to_f
.round
)
1148 else if cname
== "NativeString" then
1149 if pname
== "new" then
1150 return v
.native_string_instance_len
(args
[1].to_i
)
1152 var recvval
= args
.first
.val
.as(NativeString)
1153 if pname
== "[]" then
1154 var arg1
= args
[1].to_i
1155 return v
.byte_instance
(recvval
[arg1
])
1156 else if pname
== "[]=" then
1157 var arg1
= args
[1].to_i
1158 recvval
[arg1
] = args
[2].val
.as(Byte)
1160 else if pname
== "copy_to" then
1161 # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
1162 var destval
= args
[1].val
.as(NativeString)
1163 var lenval
= args
[2].to_i
1164 var fromval
= args
[3].to_i
1165 var toval
= args
[4].to_i
1166 recvval
.copy_to
(destval
, lenval
, fromval
, toval
)
1168 else if pname
== "atoi" then
1169 return v
.int_instance
(recvval
.atoi
)
1170 else if pname
== "fast_cstring" then
1171 var ns
= recvval
.fast_cstring
(args
[1].to_i
)
1172 return v
.native_string_instance
(ns
.to_s
)
1173 else if pname
== "fetch_4_chars" then
1174 return v
.int_instance
(args
[0].val
.as(NativeString).fetch_4_chars
(args
[1].to_i
))
1175 else if pname
== "fetch_4_hchars" then
1176 return v
.int_instance
(args
[0].val
.as(NativeString).fetch_4_hchars
(args
[1].to_i
))
1177 else if pname
== "utf8_length" then
1178 return v
.int_instance
(args
[0].val
.as(NativeString).utf8_length
(args
[1].to_i
, args
[2].to_i
))
1180 else if pname
== "calloc_string" then
1181 return v
.native_string_instance_len
(args
[1].to_i
)
1182 else if cname
== "NativeArray" then
1183 if pname
== "new" then
1184 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
1185 var instance
= new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
1186 v
.init_instance_primitive
(instance
)
1189 var recvval
= args
.first
.val
.as(Array[Instance])
1190 if pname
== "[]" then
1191 return recvval
[args
[1].to_i
]
1192 else if pname
== "[]=" then
1193 recvval
[args
[1].to_i
] = args
[2]
1195 else if pname
== "length" then
1196 return v
.int_instance
(recvval
.length
)
1197 else if pname
== "copy_to" then
1198 recvval
.copy_to
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
1201 else if cname
== "Int8" then
1202 var recvval
= args
[0].to_i8
1203 if pname
== "unary -" then
1204 return v
.int8_instance
(-recvval
)
1205 else if pname
== "unary +" then
1207 else if pname
== "+" then
1208 return v
.int8_instance
(recvval
+ args
[1].to_i8
)
1209 else if pname
== "-" then
1210 return v
.int8_instance
(recvval
- args
[1].to_i8
)
1211 else if pname
== "*" then
1212 return v
.int8_instance
(recvval
* args
[1].to_i8
)
1213 else if pname
== "%" then
1214 return v
.int8_instance
(recvval
% args
[1].to_i8
)
1215 else if pname
== "/" then
1216 return v
.int8_instance
(recvval
/ args
[1].to_i8
)
1217 else if pname
== "<" then
1218 return v
.bool_instance
(recvval
< args
[1].to_i8
)
1219 else if pname
== ">" then
1220 return v
.bool_instance
(recvval
> args
[1].to_i8
)
1221 else if pname
== "<=" then
1222 return v
.bool_instance
(recvval
<= args
[1].to_i8
)
1223 else if pname
== ">=" then
1224 return v
.bool_instance
(recvval
>= args
[1].to_i8
)
1225 else if pname
== "<=>" then
1226 return v
.int_instance
(recvval
<=> args
[1].to_i8
)
1227 else if pname
== "to_f" then
1228 return v
.float_instance
(recvval
.to_f
)
1229 else if pname
== "to_i" then
1230 return v
.int_instance
(recvval
.to_i
)
1231 else if pname
== "to_b" then
1232 return v
.byte_instance
(recvval
.to_b
)
1233 else if pname
== "to_i16" then
1234 return v
.int16_instance
(recvval
.to_i16
)
1235 else if pname
== "to_u16" then
1236 return v
.uint16_instance
(recvval
.to_u16
)
1237 else if pname
== "to_i32" then
1238 return v
.int32_instance
(recvval
.to_i32
)
1239 else if pname
== "to_u32" then
1240 return v
.uint32_instance
(recvval
.to_u32
)
1241 else if pname
== "<<" then
1242 return v
.int8_instance
(recvval
<< (args
[1].to_i
))
1243 else if pname
== ">>" then
1244 return v
.int8_instance
(recvval
>> (args
[1].to_i
))
1245 else if pname
== "&" then
1246 return v
.int8_instance
(recvval
& args
[1].to_i8
)
1247 else if pname
== "|" then
1248 return v
.int8_instance
(recvval
| args
[1].to_i8
)
1249 else if pname
== "^" then
1250 return v
.int8_instance
(recvval ^ args
[1].to_i8
)
1251 else if pname
== "unary ~" then
1252 return v
.int8_instance
(~recvval
)
1254 else if cname
== "Int16" then
1255 var recvval
= args
[0].to_i16
1256 if pname
== "unary -" then
1257 return v
.int16_instance
(-recvval
)
1258 else if pname
== "unary +" then
1260 else if pname
== "+" then
1261 return v
.int16_instance
(recvval
+ args
[1].to_i16
)
1262 else if pname
== "-" then
1263 return v
.int16_instance
(recvval
- args
[1].to_i16
)
1264 else if pname
== "*" then
1265 return v
.int16_instance
(recvval
* args
[1].to_i16
)
1266 else if pname
== "%" then
1267 return v
.int16_instance
(recvval
% args
[1].to_i16
)
1268 else if pname
== "/" then
1269 return v
.int16_instance
(recvval
/ args
[1].to_i16
)
1270 else if pname
== "<" then
1271 return v
.bool_instance
(recvval
< args
[1].to_i16
)
1272 else if pname
== ">" then
1273 return v
.bool_instance
(recvval
> args
[1].to_i16
)
1274 else if pname
== "<=" then
1275 return v
.bool_instance
(recvval
<= args
[1].to_i16
)
1276 else if pname
== ">=" then
1277 return v
.bool_instance
(recvval
>= args
[1].to_i16
)
1278 else if pname
== "<=>" then
1279 return v
.int_instance
(recvval
<=> args
[1].to_i16
)
1280 else if pname
== "to_f" then
1281 return v
.float_instance
(recvval
.to_f
)
1282 else if pname
== "to_i" then
1283 return v
.int_instance
(recvval
.to_i
)
1284 else if pname
== "to_b" then
1285 return v
.byte_instance
(recvval
.to_b
)
1286 else if pname
== "to_i8" then
1287 return v
.int8_instance
(recvval
.to_i8
)
1288 else if pname
== "to_u16" then
1289 return v
.uint16_instance
(recvval
.to_u16
)
1290 else if pname
== "to_i32" then
1291 return v
.int32_instance
(recvval
.to_i32
)
1292 else if pname
== "to_u32" then
1293 return v
.uint32_instance
(recvval
.to_u32
)
1294 else if pname
== "<<" then
1295 return v
.int16_instance
(recvval
<< (args
[1].to_i
))
1296 else if pname
== ">>" then
1297 return v
.int16_instance
(recvval
>> (args
[1].to_i
))
1298 else if pname
== "&" then
1299 return v
.int16_instance
(recvval
& args
[1].to_i16
)
1300 else if pname
== "|" then
1301 return v
.int16_instance
(recvval
| args
[1].to_i16
)
1302 else if pname
== "^" then
1303 return v
.int16_instance
(recvval ^ args
[1].to_i16
)
1304 else if pname
== "unary ~" then
1305 return v
.int16_instance
(~recvval
)
1307 else if cname
== "UInt16" then
1308 var recvval
= args
[0].to_u16
1309 if pname
== "unary -" then
1310 return v
.uint16_instance
(-recvval
)
1311 else if pname
== "unary +" then
1313 else if pname
== "+" then
1314 return v
.uint16_instance
(recvval
+ args
[1].to_u16
)
1315 else if pname
== "-" then
1316 return v
.uint16_instance
(recvval
- args
[1].to_u16
)
1317 else if pname
== "*" then
1318 return v
.uint16_instance
(recvval
* args
[1].to_u16
)
1319 else if pname
== "%" then
1320 return v
.uint16_instance
(recvval
% args
[1].to_u16
)
1321 else if pname
== "/" then
1322 return v
.uint16_instance
(recvval
/ args
[1].to_u16
)
1323 else if pname
== "<" then
1324 return v
.bool_instance
(recvval
< args
[1].to_u16
)
1325 else if pname
== ">" then
1326 return v
.bool_instance
(recvval
> args
[1].to_u16
)
1327 else if pname
== "<=" then
1328 return v
.bool_instance
(recvval
<= args
[1].to_u16
)
1329 else if pname
== ">=" then
1330 return v
.bool_instance
(recvval
>= args
[1].to_u16
)
1331 else if pname
== "<=>" then
1332 return v
.int_instance
(recvval
<=> args
[1].to_u16
)
1333 else if pname
== "to_f" then
1334 return v
.float_instance
(recvval
.to_f
)
1335 else if pname
== "to_i" then
1336 return v
.int_instance
(recvval
.to_i
)
1337 else if pname
== "to_b" then
1338 return v
.byte_instance
(recvval
.to_b
)
1339 else if pname
== "to_i8" then
1340 return v
.int8_instance
(recvval
.to_i8
)
1341 else if pname
== "to_i16" then
1342 return v
.int16_instance
(recvval
.to_i16
)
1343 else if pname
== "to_i32" then
1344 return v
.int32_instance
(recvval
.to_i32
)
1345 else if pname
== "to_u32" then
1346 return v
.uint32_instance
(recvval
.to_u32
)
1347 else if pname
== "<<" then
1348 return v
.uint16_instance
(recvval
<< (args
[1].to_i
))
1349 else if pname
== ">>" then
1350 return v
.uint16_instance
(recvval
>> (args
[1].to_i
))
1351 else if pname
== "&" then
1352 return v
.uint16_instance
(recvval
& args
[1].to_u16
)
1353 else if pname
== "|" then
1354 return v
.uint16_instance
(recvval
| args
[1].to_u16
)
1355 else if pname
== "^" then
1356 return v
.uint16_instance
(recvval ^ args
[1].to_u16
)
1357 else if pname
== "unary ~" then
1358 return v
.uint16_instance
(~recvval
)
1360 else if cname
== "Int32" then
1361 var recvval
= args
[0].to_i32
1362 if pname
== "unary -" then
1363 return v
.int32_instance
(-recvval
)
1364 else if pname
== "unary +" then
1366 else if pname
== "+" then
1367 return v
.int32_instance
(recvval
+ args
[1].to_i32
)
1368 else if pname
== "-" then
1369 return v
.int32_instance
(recvval
- args
[1].to_i32
)
1370 else if pname
== "*" then
1371 return v
.int32_instance
(recvval
* args
[1].to_i32
)
1372 else if pname
== "%" then
1373 return v
.int32_instance
(recvval
% args
[1].to_i32
)
1374 else if pname
== "/" then
1375 return v
.int32_instance
(recvval
/ args
[1].to_i32
)
1376 else if pname
== "<" then
1377 return v
.bool_instance
(recvval
< args
[1].to_i32
)
1378 else if pname
== ">" then
1379 return v
.bool_instance
(recvval
> args
[1].to_i32
)
1380 else if pname
== "<=" then
1381 return v
.bool_instance
(recvval
<= args
[1].to_i32
)
1382 else if pname
== ">=" then
1383 return v
.bool_instance
(recvval
>= args
[1].to_i32
)
1384 else if pname
== "<=>" then
1385 return v
.int_instance
(recvval
<=> args
[1].to_i32
)
1386 else if pname
== "to_f" then
1387 return v
.float_instance
(recvval
.to_f
)
1388 else if pname
== "to_i" then
1389 return v
.int_instance
(recvval
.to_i
)
1390 else if pname
== "to_b" then
1391 return v
.byte_instance
(recvval
.to_b
)
1392 else if pname
== "to_i8" then
1393 return v
.int8_instance
(recvval
.to_i8
)
1394 else if pname
== "to_i16" then
1395 return v
.int16_instance
(recvval
.to_i16
)
1396 else if pname
== "to_u16" then
1397 return v
.uint16_instance
(recvval
.to_u16
)
1398 else if pname
== "to_u32" then
1399 return v
.uint32_instance
(recvval
.to_u32
)
1400 else if pname
== "<<" then
1401 return v
.int32_instance
(recvval
<< (args
[1].to_i
))
1402 else if pname
== ">>" then
1403 return v
.int32_instance
(recvval
>> (args
[1].to_i
))
1404 else if pname
== "&" then
1405 return v
.int32_instance
(recvval
& args
[1].to_i32
)
1406 else if pname
== "|" then
1407 return v
.int32_instance
(recvval
| args
[1].to_i32
)
1408 else if pname
== "^" then
1409 return v
.int32_instance
(recvval ^ args
[1].to_i32
)
1410 else if pname
== "unary ~" then
1411 return v
.int32_instance
(~recvval
)
1413 else if cname
== "UInt32" then
1414 var recvval
= args
[0].to_u32
1415 if pname
== "unary -" then
1416 return v
.uint32_instance
(-recvval
)
1417 else if pname
== "unary +" then
1419 else if pname
== "+" then
1420 return v
.uint32_instance
(recvval
+ args
[1].to_u32
)
1421 else if pname
== "-" then
1422 return v
.uint32_instance
(recvval
- args
[1].to_u32
)
1423 else if pname
== "*" then
1424 return v
.uint32_instance
(recvval
* args
[1].to_u32
)
1425 else if pname
== "%" then
1426 return v
.uint32_instance
(recvval
% args
[1].to_u32
)
1427 else if pname
== "/" then
1428 return v
.uint32_instance
(recvval
/ args
[1].to_u32
)
1429 else if pname
== "<" then
1430 return v
.bool_instance
(recvval
< args
[1].to_u32
)
1431 else if pname
== ">" then
1432 return v
.bool_instance
(recvval
> args
[1].to_u32
)
1433 else if pname
== "<=" then
1434 return v
.bool_instance
(recvval
<= args
[1].to_u32
)
1435 else if pname
== ">=" then
1436 return v
.bool_instance
(recvval
>= args
[1].to_u32
)
1437 else if pname
== "<=>" then
1438 return v
.int_instance
(recvval
<=> args
[1].to_u32
)
1439 else if pname
== "to_f" then
1440 return v
.float_instance
(recvval
.to_f
)
1441 else if pname
== "to_i" then
1442 return v
.int_instance
(recvval
.to_i
)
1443 else if pname
== "to_b" then
1444 return v
.byte_instance
(recvval
.to_b
)
1445 else if pname
== "to_i8" then
1446 return v
.int8_instance
(recvval
.to_i8
)
1447 else if pname
== "to_i16" then
1448 return v
.int16_instance
(recvval
.to_i16
)
1449 else if pname
== "to_u16" then
1450 return v
.uint16_instance
(recvval
.to_u16
)
1451 else if pname
== "to_i32" then
1452 return v
.int32_instance
(recvval
.to_i32
)
1453 else if pname
== "<<" then
1454 return v
.uint32_instance
(recvval
<< (args
[1].to_i
))
1455 else if pname
== ">>" then
1456 return v
.uint32_instance
(recvval
>> (args
[1].to_i
))
1457 else if pname
== "&" then
1458 return v
.uint32_instance
(recvval
& args
[1].to_u32
)
1459 else if pname
== "|" then
1460 return v
.uint32_instance
(recvval
| args
[1].to_u32
)
1461 else if pname
== "^" then
1462 return v
.uint32_instance
(recvval ^ args
[1].to_u32
)
1463 else if pname
== "unary ~" then
1464 return v
.uint32_instance
(~recvval
)
1466 else if pname
== "native_argc" then
1467 return v
.int_instance
(v
.arguments
.length
)
1468 else if pname
== "native_argv" then
1469 var txt
= v
.arguments
[args
[1].to_i
]
1470 return v
.native_string_instance
(txt
)
1471 else if pname
== "native_argc" then
1472 return v
.int_instance
(v
.arguments
.length
)
1473 else if pname
== "native_argv" then
1474 var txt
= v
.arguments
[args
[1].to_i
]
1475 return v
.native_string_instance
(txt
)
1476 else if pname
== "lexer_goto" then
1477 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
1478 else if pname
== "lexer_accept" then
1479 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
1480 else if pname
== "parser_goto" then
1481 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
1482 else if pname
== "parser_action" then
1483 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
1485 return v
.error_instance
1489 redef class AAttrPropdef
1490 redef fun call
(v
, mpropdef
, args
)
1492 var recv
= args
.first
1493 assert recv
isa MutableInstance
1494 var attr
= self.mpropdef
.mproperty
1495 if mpropdef
== mreadpropdef
then
1496 assert args
.length
== 1
1497 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
1498 var f
= v
.new_frame
(self, mpropdef
, args
)
1499 return evaluate_expr
(v
, recv
, f
)
1500 else if mpropdef
== mwritepropdef
then
1501 assert args
.length
== 2
1503 if is_optional
and arg
.mtype
isa MNullType then
1504 var f
= v
.new_frame
(self, mpropdef
, args
)
1505 arg
= evaluate_expr
(v
, recv
, f
)
1507 v
.write_attribute
(attr
, recv
, arg
)
1514 # Evaluate and set the default value of the attribute in `recv`
1515 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1517 if is_lazy
or is_optional
then return
1519 var f
= v
.new_frame
(self, mreadpropdef
.as(not null), [recv
])
1520 evaluate_expr
(v
, recv
, f
)
1523 var mpropdef
= self.mpropdef
1524 if mpropdef
== null then return
1525 var mtype
= self.mtype
.as(not null)
1526 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1527 if mtype
isa MNullableType then
1528 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1532 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance, f
: Frame): Instance
1534 assert recv
isa MutableInstance
1539 var nexpr
= self.n_expr
1540 var nblock
= self.n_block
1541 if nexpr
!= null then
1543 else if nblock
!= null then
1545 assert v
.escapemark
== return_mark
1554 assert not v
.is_escaping
1555 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1560 redef class AClassdef
1561 # Execute an implicit `mpropdef` associated with the current node.
1562 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance]): nullable Instance
1564 if mpropdef
.mproperty
.is_root_init
then
1565 assert arguments
.length
== 1
1566 if not mpropdef
.is_intro
then
1567 # standard call-next-method
1568 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
1569 v
.call
(superpd
, arguments
)
1579 # Evaluate the node as a possible expression.
1580 # Return a possible value
1581 # NOTE: Do not call this method directly, but use `v.expr`
1582 # This method is here to be implemented by subclasses.
1583 protected fun expr
(v
: NaiveInterpreter): nullable Instance
1585 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1589 # Evaluate the node as a statement.
1590 # NOTE: Do not call this method directly, but use `v.stmt`
1591 # This method is here to be implemented by subclasses (no need to return something).
1592 protected fun stmt
(v
: NaiveInterpreter)
1599 redef class ABlockExpr
1602 var last
= self.n_expr
.last
1603 for e
in self.n_expr
do
1604 if e
== last
then break
1606 if v
.is_escaping
then return null
1613 for e
in self.n_expr
do
1615 if v
.is_escaping
then return
1620 redef class AVardeclExpr
1623 var ne
= self.n_expr
1626 if i
== null then return null
1627 v
.write_variable
(self.variable
.as(not null), i
)
1634 redef class AVarExpr
1637 return v
.read_variable
(self.variable
.as(not null))
1641 redef class AVarAssignExpr
1644 var i
= v
.expr
(self.n_value
)
1645 if i
== null then return null
1646 v
.write_variable
(self.variable
.as(not null), i
)
1651 redef class AVarReassignExpr
1654 var variable
= self.variable
.as(not null)
1655 var vari
= v
.read_variable
(variable
)
1656 var value
= v
.expr
(self.n_value
)
1657 if value
== null then return
1658 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1660 v
.write_variable
(variable
, res
)
1664 redef class ASelfExpr
1667 return v
.frame
.arguments
.first
1671 redef class AImplicitSelfExpr
1674 if not is_sys
then return super
1679 redef class AEscapeExpr
1682 var ne
= self.n_expr
1685 if i
== null then return
1688 v
.escapemark
= self.escapemark
1692 redef class AAbortExpr
1695 # Abort as asked if there is no `catch` bloc
1696 if v
.catch_count
<= 0 then
1708 var cond
= v
.expr
(self.n_expr
)
1709 if cond
== null then return null
1710 if cond
.is_true
then
1711 return v
.expr
(self.n_then
.as(not null))
1713 return v
.expr
(self.n_else
.as(not null))
1719 var cond
= v
.expr
(self.n_expr
)
1720 if cond
== null then return
1721 if cond
.is_true
then
1729 redef class AIfexprExpr
1732 var cond
= v
.expr
(self.n_expr
)
1733 if cond
== null then return null
1734 if cond
.is_true
then
1735 return v
.expr
(self.n_then
)
1737 return v
.expr
(self.n_else
)
1745 # If this bloc has a catch, handle it with a do ... catch ... end
1746 if self.n_catch
!= null then
1750 v
.stmt
(self.n_block
)
1751 v
.is_escape
(self.break_mark
) # Clear the break (if any)
1754 # Restore the current frame if needed
1755 while v
.frame
!= frame
do v
.frames
.shift
1757 v
.stmt
(self.n_catch
)
1760 v
.stmt
(self.n_block
)
1761 v
.is_escape
(self.break_mark
)
1766 redef class AWhileExpr
1770 var cond
= v
.expr
(self.n_expr
)
1771 if cond
== null then return
1772 if not cond
.is_true
then return
1773 v
.stmt
(self.n_block
)
1774 if v
.is_escape
(self.break_mark
) then return
1775 v
.is_escape
(self.continue_mark
) # Clear the break
1776 if v
.is_escaping
then return
1781 redef class ALoopExpr
1785 v
.stmt
(self.n_block
)
1786 if v
.is_escape
(self.break_mark
) then return
1787 v
.is_escape
(self.continue_mark
) # Clear the break
1788 if v
.is_escaping
then return
1793 redef class AForExpr
1796 var iters
= new Array[Instance]
1798 for g
in n_groups
do
1799 var col
= v
.expr
(g
.n_expr
)
1800 if col
== null then return
1801 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1803 var iter
= v
.callsite
(g
.method_iterator
, [col
]).as(not null)
1808 for g
in n_groups
, iter
in iters
do
1809 var isok
= v
.callsite
(g
.method_is_ok
, [iter
]).as(not null)
1810 if not isok
.is_true
then break label
1811 if g
.variables
.length
== 1 then
1812 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1813 #self.debug("item {item}")
1814 v
.write_variable
(g
.variables
.first
, item
)
1815 else if g
.variables
.length
== 2 then
1816 var key
= v
.callsite
(g
.method_key
, [iter
]).as(not null)
1817 v
.write_variable
(g
.variables
[0], key
)
1818 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1819 v
.write_variable
(g
.variables
[1], item
)
1824 v
.stmt
(self.n_block
)
1825 if v
.is_escape
(self.break_mark
) then break
1826 v
.is_escape
(self.continue_mark
) # Clear the break
1827 if v
.is_escaping
then break
1828 for g
in n_groups
, iter
in iters
do
1829 v
.callsite
(g
.method_next
, [iter
])
1832 for g
in n_groups
, iter
in iters
do
1833 var method_finish
= g
.method_finish
1834 if method_finish
!= null then
1835 v
.callsite
(method_finish
, [iter
])
1841 redef class AWithExpr
1844 var expr
= v
.expr
(self.n_expr
)
1845 if expr
== null then return
1847 v
.callsite
(method_start
, [expr
])
1848 v
.stmt
(self.n_block
)
1849 v
.is_escape
(self.break_mark
) # Clear the break
1851 # Execute the finally without an escape
1852 var old_mark
= v
.escapemark
1854 v
.callsite
(method_finish
, [expr
])
1855 # Restore the escape unless another escape was provided
1856 if v
.escapemark
== null then v
.escapemark
= old_mark
1860 redef class AAssertExpr
1863 var cond
= v
.expr
(self.n_expr
)
1864 if cond
== null then return
1865 if not cond
.is_true
then
1867 if v
.is_escaping
then return
1870 fatal
(v
, "Assert '{nid.text}' failed")
1872 fatal
(v
, "Assert failed")
1882 var cond
= v
.expr
(self.n_expr
)
1883 if cond
== null then return null
1884 if cond
.is_true
then return cond
1885 return v
.expr
(self.n_expr2
)
1889 redef class AImpliesExpr
1892 var cond
= v
.expr
(self.n_expr
)
1893 if cond
== null then return null
1894 if not cond
.is_true
then return v
.true_instance
1895 return v
.expr
(self.n_expr2
)
1899 redef class AAndExpr
1902 var cond
= v
.expr
(self.n_expr
)
1903 if cond
== null then return null
1904 if not cond
.is_true
then return cond
1905 return v
.expr
(self.n_expr2
)
1909 redef class ANotExpr
1912 var cond
= v
.expr
(self.n_expr
)
1913 if cond
== null then return null
1914 return v
.bool_instance
(not cond
.is_true
)
1918 redef class AOrElseExpr
1921 var i
= v
.expr
(self.n_expr
)
1922 if i
== null then return null
1923 if i
!= v
.null_instance
then return i
1924 return v
.expr
(self.n_expr2
)
1928 redef class AIntegerExpr
1931 if value
isa Int then return v
.int_instance
(value
.as(Int))
1932 if value
isa Byte then return v
.byte_instance
(value
.as(Byte))
1933 if value
isa Int8 then return v
.int8_instance
(value
.as(Int8))
1934 if value
isa Int16 then return v
.int16_instance
(value
.as(Int16))
1935 if value
isa UInt16 then return v
.uint16_instance
(value
.as(UInt16))
1936 if value
isa Int32 then return v
.int32_instance
(value
.as(Int32))
1937 if value
isa UInt32 then return v
.uint32_instance
(value
.as(UInt32))
1942 redef class AFloatExpr
1945 return v
.float_instance
(self.value
.as(not null))
1949 redef class ACharExpr
1952 if is_ascii
then return v
.byte_instance
(self.value
.as(not null).ascii
)
1953 if is_code_point
then return v
.int_instance
(self.value
.as(not null).code_point
)
1954 return v
.char_instance
(self.value
.as(not null))
1958 redef class AArrayExpr
1961 var val
= new Array[Instance]
1962 var old_comprehension
= v
.frame
.comprehension
1963 v
.frame
.comprehension
= val
1964 for nexpr
in self.n_exprs
do
1965 if nexpr
isa AForExpr then
1968 var i
= v
.expr
(nexpr
)
1969 if i
== null then return null
1973 v
.frame
.comprehension
= old_comprehension
1974 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
1975 var elttype
= mtype
.arguments
.first
1976 return v
.array_instance
(val
, elttype
)
1980 redef class AugmentedStringFormExpr
1981 # Factorize the making of a `Regex` object from a literal prefixed string
1982 fun make_re
(v
: NaiveInterpreter, rs
: Instance): nullable Instance do
1985 var res
= v
.callsite
(tore
, [rs
])
1987 print
"Cannot call property `to_re` on {self}"
1990 for j
in suffix
.chars
do
1992 var prop
= ignore_case
1994 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2000 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2006 v
.callsite
(prop
, [res
, v
.bool_instance
(false)])
2009 # Should not happen, this needs to be updated
2010 # along with the addition of new suffixes
2017 redef class AStringFormExpr
2018 redef fun expr
(v
) do return v
.string_instance
(value
)
2021 redef class AStringExpr
2022 redef fun expr
(v
) do
2023 var s
= v
.string_instance
(value
)
2024 if is_string
then return s
2025 if is_bytestring
then
2026 var ns
= v
.native_string_instance_from_ns
(bytes
.items
, bytes
.length
)
2027 var ln
= v
.int_instance
(bytes
.length
)
2028 var prop
= to_bytes_with_copy
2030 var res
= v
.callsite
(prop
, [ns
, ln
])
2032 print
"Cannot call property `to_bytes` on {self}"
2037 var res
= make_re
(v
, s
)
2041 print
"Unimplemented prefix or suffix for {self}"
2048 redef class ASuperstringExpr
2051 var array
= new Array[Instance]
2052 for nexpr
in n_exprs
do
2053 var i
= v
.expr
(nexpr
)
2054 if i
== null then return null
2057 var i
= v
.array_instance
(array
, v
.mainmodule
.object_type
)
2058 var res
= v
.send
(v
.force_get_primitive_method
("plain_to_s", i
.mtype
), [i
])
2060 if is_re
then res
= make_re
(v
, res
)
2065 redef class ACrangeExpr
2068 var e1
= v
.expr
(self.n_expr
)
2069 if e1
== null then return null
2070 var e2
= v
.expr
(self.n_expr2
)
2071 if e2
== null then return null
2072 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2073 var res
= new MutableInstance(mtype
)
2074 v
.init_instance
(res
)
2075 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2080 redef class AOrangeExpr
2083 var e1
= v
.expr
(self.n_expr
)
2084 if e1
== null then return null
2085 var e2
= v
.expr
(self.n_expr2
)
2086 if e2
== null then return null
2087 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2088 var res
= new MutableInstance(mtype
)
2089 v
.init_instance
(res
)
2090 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2095 redef class ATrueExpr
2098 return v
.bool_instance
(true)
2102 redef class AFalseExpr
2105 return v
.bool_instance
(false)
2109 redef class ANullExpr
2112 return v
.null_instance
2116 redef class AIsaExpr
2119 var i
= v
.expr
(self.n_expr
)
2120 if i
== null then return null
2121 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
2122 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
2126 redef class AAsCastExpr
2129 var i
= v
.expr
(self.n_expr
)
2130 if i
== null then return null
2131 var mtype
= self.mtype
.as(not null)
2132 var amtype
= v
.unanchor_type
(mtype
)
2133 if not v
.is_subtype
(i
.mtype
, amtype
) then
2134 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
2140 redef class AAsNotnullExpr
2143 var i
= v
.expr
(self.n_expr
)
2144 if i
== null then return null
2145 if i
.mtype
isa MNullType then
2146 fatal
(v
, "Cast failed")
2152 redef class AParExpr
2155 return v
.expr
(self.n_expr
)
2159 redef class AOnceExpr
2162 if v
.onces
.has_key
(self) then
2163 return v
.onces
[self]
2165 var res
= v
.expr
(self.n_expr
)
2166 if res
== null then return null
2173 redef class ASendExpr
2176 var recv
= v
.expr
(self.n_expr
)
2177 if recv
== null then return null
2178 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2179 if args
== null then return null
2181 var res
= v
.callsite
(callsite
, args
)
2186 redef class ASendReassignFormExpr
2189 var recv
= v
.expr
(self.n_expr
)
2190 if recv
== null then return
2191 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2192 if args
== null then return
2193 var value
= v
.expr
(self.n_value
)
2194 if value
== null then return
2196 var read
= v
.callsite
(callsite
, args
)
2199 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
2200 assert write
!= null
2204 v
.callsite
(write_callsite
, args
)
2208 redef class ASuperExpr
2211 var recv
= v
.frame
.arguments
.first
2213 var callsite
= self.callsite
2214 if callsite
!= null then
2216 if self.n_args
.n_exprs
.is_empty
then
2217 # Add automatic arguments for the super init call
2219 for i
in [0..callsite
.msignature
.arity
[ do
2220 args
.add
(v
.frame
.arguments
[i
+1])
2223 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2224 if args
== null then return null
2228 var res
= v
.callsite
(callsite
, args
)
2232 # Standard call-next-method
2233 var mpropdef
= self.mpropdef
2234 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
2237 if self.n_args
.n_exprs
.is_empty
then
2238 args
= v
.frame
.arguments
2240 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
2241 if args
== null then return null
2244 var res
= v
.call
(mpropdef
, args
)
2249 redef class ANewExpr
2252 var mtype
= v
.unanchor_type
(self.recvtype
.as(not null))
2253 var recv
: Instance = new MutableInstance(mtype
)
2254 v
.init_instance
(recv
)
2255 var callsite
= self.callsite
2256 if callsite
== null then return recv
2258 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2259 if args
== null then return null
2260 var res2
= v
.callsite
(callsite
, args
)
2261 if res2
!= null then
2262 #self.debug("got {res2} from {mproperty}. drop {recv}")
2269 redef class AAttrExpr
2272 var recv
= v
.expr
(self.n_expr
)
2273 if recv
== null then return null
2274 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2275 var mproperty
= self.mproperty
.as(not null)
2276 return v
.read_attribute
(mproperty
, recv
)
2280 redef class AAttrAssignExpr
2283 var recv
= v
.expr
(self.n_expr
)
2284 if recv
== null then return
2285 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2286 var i
= v
.expr
(self.n_value
)
2287 if i
== null then return
2288 var mproperty
= self.mproperty
.as(not null)
2289 v
.write_attribute
(mproperty
, recv
, i
)
2293 redef class AAttrReassignExpr
2296 var recv
= v
.expr
(self.n_expr
)
2297 if recv
== null then return
2298 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2299 var value
= v
.expr
(self.n_value
)
2300 if value
== null then return
2301 var mproperty
= self.mproperty
.as(not null)
2302 var attr
= v
.read_attribute
(mproperty
, recv
)
2303 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
2305 v
.write_attribute
(mproperty
, recv
, res
)
2309 redef class AIssetAttrExpr
2312 var recv
= v
.expr
(self.n_expr
)
2313 if recv
== null then return null
2314 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2315 var mproperty
= self.mproperty
.as(not null)
2316 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
2320 redef class AVarargExpr
2323 return v
.expr
(self.n_expr
)
2327 redef class ANamedargExpr
2330 return v
.expr
(self.n_expr
)
2334 redef class ADebugTypeExpr