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 private import model
::serialize_model
25 private import frontend
::explain_assert_api
27 redef class ToolContext
28 # --discover-call-trace
29 var opt_discover_call_trace
= new OptionBool("Trace calls of the first invocation of methods", "--discover-call-trace")
34 self.option_context
.add_option
(self.opt_discover_call_trace
)
38 redef class ModelBuilder
39 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
40 # `arguments` are the command-line arguments in order
42 # 1. the AST is fully loaded.
43 # 2. the model is fully built.
44 # 3. the instructions are fully analysed.
45 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
48 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
50 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
51 interpreter
.start
(mainmodule
)
54 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
58 # The visitor that interprets the Nit Program by walking on the AST
59 class NaiveInterpreter
60 # The modelbuilder that know the AST and its associations with the model
61 var modelbuilder
: ModelBuilder
63 # The main module of the program (used to lookup method)
64 var mainmodule
: MModule is writable
66 # The command line arguments of the interpreted program
67 # arguments.first is the program name
68 # arguments[1] is the first argument
69 var arguments
: Array[String]
71 # The main Sys instance
72 var mainobj
: nullable Instance is noinit
76 if mainmodule
.model
.get_mclasses_by_name
("Bool") != null then
77 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
78 init_instance_primitive
(self.true_instance
)
79 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
80 init_instance_primitive
(self.false_instance
)
82 self.null_instance
= new PrimitiveInstance[nullable Object](mainmodule
.model
.null_type
, null)
85 # Starts the interpreter on the main module of a program
86 fun start
(mainmodule
: MModule) do
87 var interpreter
= self
88 var sys_type
= mainmodule
.sys_type
89 if sys_type
== null then return # no class Sys
90 var mainobj
= new MutableInstance(sys_type
)
91 interpreter
.mainobj
= mainobj
92 interpreter
.init_instance
(mainobj
)
93 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
94 if initprop
!= null then
95 interpreter
.send
(initprop
, [mainobj
])
97 var mainprop
= mainmodule
.try_get_primitive_method
("run", sys_type
.mclass
) or else
98 mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
99 if mainprop
!= null then
100 interpreter
.send
(mainprop
, [mainobj
])
104 # Subtype test in the context of the mainmodule
105 fun is_subtype
(sub
, sup
: MType): Bool
107 return sub
.is_subtype
(self.mainmodule
, current_receiver_class
, sup
)
110 # Get a primitive method in the context of the main module
111 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
113 assert recv
isa MClassType
114 return self.modelbuilder
.force_get_primitive_method
(current_node
, name
, recv
.mclass
, self.mainmodule
)
117 # Is a return, a break or a continue executed?
118 # Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
119 var escapemark
: nullable EscapeMark = null
121 # The count of `catch` blocs that have been encountered and can catch an abort
122 var catch_count
= 0 is writable
124 # The last error thrown on abort/runtime error where catch_count > 0
125 var last_error
: nullable FatalError = null
127 # Is a return or a break or a continue executed?
128 # Use this function to know if you must skip the evaluation of statements
129 fun is_escaping
: Bool do return escapemark
!= null
131 # The value associated with the current return/break/continue, if any.
132 # Set the value when you set a escapemark.
133 # Read the value when you catch a mark or reach the end of a method
134 var escapevalue
: nullable Instance = null
136 # If there is a break/continue and is associated with `escapemark`, then return true and clear the mark.
137 # If there is no break/continue or if `escapemark` is null then return false.
138 # Use this function to catch a potential break/continue.
139 fun is_escape
(escapemark
: nullable EscapeMark): Bool
141 if escapemark
!= null and self.escapemark
== escapemark
then
142 self.escapemark
= null
149 # Evaluate `n` as an expression in the current context.
150 # Return the value of the expression.
151 # If `n` cannot be evaluated, then aborts.
152 fun expr
(n
: AExpr): nullable Instance
154 var frame
= self.frame
155 var old
= frame
.current_node
156 frame
.current_node
= n
157 #n.debug("IN Execute expr")
159 if i
== null and not self.is_escaping
then
160 n
.debug
("inconsitance: no value and not escaping.")
162 var implicit_cast_to
= n
.implicit_cast_to
163 if i
!= null and implicit_cast_to
!= null then
164 var mtype
= self.unanchor_type
(implicit_cast_to
)
165 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
168 #n.debug("OUT Execute expr: value is {i}")
169 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
170 frame
.current_node
= old
174 # Evaluate `n` as a statement in the current context.
175 # Do nothing if `n` is null.
176 # If `n` cannot be evaluated, then aborts.
177 fun stmt
(n
: nullable AExpr)
179 if n
== null then return
181 if n
.comprehension
!= null then
182 var comprehension
= frame
.comprehension
.as(not null)
184 if i
!= null then comprehension
.add
(i
)
188 var frame
= self.frame
189 var old
= frame
.current_node
190 frame
.current_node
= n
192 frame
.current_node
= old
195 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
196 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
198 # Return the boolean instance associated with `val`.
199 fun bool_instance
(val
: Bool): Instance
201 if val
then return self.true_instance
else return self.false_instance
204 # Return the integer instance associated with `val`.
205 fun int_instance
(val
: Int): Instance
207 var t
= mainmodule
.int_type
208 var instance
= new PrimitiveInstance[Int](t
, val
)
209 init_instance_primitive
(instance
)
213 # Return the byte instance associated with `val`.
214 fun byte_instance
(val
: Byte): Instance
216 var t
= mainmodule
.byte_type
217 var instance
= new PrimitiveInstance[Byte](t
, val
)
218 init_instance_primitive
(instance
)
222 # Return the int8 instance associated with `val`.
223 fun int8_instance
(val
: Int8): Instance
225 var t
= mainmodule
.int8_type
226 var instance
= new PrimitiveInstance[Int8](t
, val
)
227 init_instance_primitive
(instance
)
231 # Return the int16 instance associated with `val`.
232 fun int16_instance
(val
: Int16): Instance
234 var t
= mainmodule
.int16_type
235 var instance
= new PrimitiveInstance[Int16](t
, val
)
236 init_instance_primitive
(instance
)
240 # Return the uint16 instance associated with `val`.
241 fun uint16_instance
(val
: UInt16): Instance
243 var t
= mainmodule
.uint16_type
244 var instance
= new PrimitiveInstance[UInt16](t
, val
)
245 init_instance_primitive
(instance
)
249 # Return the int32 instance associated with `val`.
250 fun int32_instance
(val
: Int32): Instance
252 var t
= mainmodule
.int32_type
253 var instance
= new PrimitiveInstance[Int32](t
, val
)
254 init_instance_primitive
(instance
)
258 # Return the uint32 instance associated with `val`.
259 fun uint32_instance
(val
: UInt32): Instance
261 var t
= mainmodule
.uint32_type
262 var instance
= new PrimitiveInstance[UInt32](t
, val
)
263 init_instance_primitive
(instance
)
267 # Return the char instance associated with `val`.
268 fun char_instance
(val
: Char): Instance
270 var t
= mainmodule
.char_type
271 var instance
= new PrimitiveInstance[Char](t
, val
)
272 init_instance_primitive
(instance
)
276 # Return the float instance associated with `val`.
277 fun float_instance
(val
: Float): Instance
279 var t
= mainmodule
.float_type
280 var instance
= new PrimitiveInstance[Float](t
, val
)
281 init_instance_primitive
(instance
)
285 # The unique instance of the `true` value.
286 var true_instance
: Instance is noinit
288 # The unique instance of the `false` value.
289 var false_instance
: Instance is noinit
291 # The unique instance of the `null` value.
292 var null_instance
: Instance is noinit
294 # Return a new array made of `values`.
295 # The dynamic type of the result is Array[elttype].
296 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
298 assert not elttype
.need_anchor
299 var nat
= new PrimitiveInstance[Array[Instance]](mainmodule
.native_array_type
(elttype
), values
)
300 init_instance_primitive
(nat
)
301 var mtype
= mainmodule
.array_type
(elttype
)
302 var res
= new MutableInstance(mtype
)
303 self.init_instance
(res
)
304 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
308 # Return a instance associated to a primitive class
309 # Current primitive classes are `Int`, `Bool`, and `String`
310 fun value_instance
(object
: Object): Instance
312 if object
isa Int then
313 return int_instance
(object
)
314 else if object
isa Bool then
315 return bool_instance
(object
)
316 else if object
isa String then
317 return string_instance
(object
)
323 # Return a new C string initialized with `txt`
324 fun c_string_instance
(txt
: String): Instance
326 var instance
= c_string_instance_len
(txt
.byte_length
+1)
327 var val
= instance
.val
328 val
[txt
.byte_length
] = 0
329 txt
.to_cstring
.copy_to
(val
, txt
.byte_length
, 0, 0)
334 # Return a new C string initialized with `txt`
335 fun c_string_instance_from_ns
(txt
: CString, len
: Int): Instance
337 var instance
= c_string_instance_len
(len
)
338 var val
= instance
.val
339 txt
.copy_to
(val
, len
, 0, 0)
344 # Return a new C string instance sharing the same data space as `txt`
345 fun c_string_instance_fast_cstr
(txt
: CString, from
: Int): Instance
347 var ncstr
= txt
.fast_cstring
(from
)
348 var t
= mainmodule
.c_string_type
350 var instance
= new PrimitiveInstance[CString](t
, ncstr
)
351 init_instance_primitive
(instance
)
356 # Return a new C string initialized of `length`
357 fun c_string_instance_len
(length
: Int): PrimitiveInstance[CString]
359 var val
= new CString(length
)
361 var t
= mainmodule
.c_string_type
362 var instance
= new PrimitiveInstance[CString](t
, val
)
363 init_instance_primitive
(instance
)
367 # Return a new String instance for `txt`
368 fun string_instance
(txt
: String): Instance
370 var nat
= c_string_instance
(txt
)
371 var res
= self.send
(self.force_get_primitive_method
("to_s_unsafe", nat
.mtype
), [nat
, self.int_instance
(txt
.byte_length
), self.int_instance
(txt
.length
), self.false_instance
, self.false_instance
])
376 # The virtual type of the frames used in the execution engine
379 # The current frame used to store local variables of the current method executed
380 fun frame
: FRAME do return frames
.first
382 # The stack of all frames. The first one is the current one.
383 var frames
= new List[FRAME]
385 # Return a stack trace. One line per function
386 fun stack_trace
: String
388 var b
= new FlatBuffer
389 b
.append
(",---- Stack trace -- - - -\n")
391 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
393 b
.append
("`------------------- - - -")
397 # The current node, used to print errors, debug and stack-traces
398 fun current_node
: nullable ANode
400 if frames
.is_empty
then return null
401 return frames
.first
.current_node
404 # The dynamic type of the current `self`
405 fun current_receiver_class
: MClassType
407 return frames
.first
.arguments
.first
.mtype
.as(MClassType)
410 # Initialize the environment for a call and return a new Frame
411 # *`node` The AST node
412 # *`mpropdef` The corresponding mpropdef
413 # *`args` Arguments of the call
414 fun new_frame
(node
: ANode, mpropdef
: MPropDef, args
: Array[Instance]): FRAME
416 return new InterpreterFrame(node
, mpropdef
, args
)
419 # Exit the program with a message
420 fun fatal
(message
: String)
422 var node
= current_node
426 node
.fatal
(self, message
)
431 # Debug on the current node
432 fun debug
(message
: String)
434 var node
= current_node
442 # Retrieve the value of the variable in the current frame
443 fun read_variable
(v
: Variable): Instance
445 var f
= frames
.first
.as(InterpreterFrame)
449 # Assign the value of the variable in the current frame
450 fun write_variable
(v
: Variable, value
: Instance)
452 var f
= frames
.first
.as(InterpreterFrame)
456 # Store known methods, used to trace methods as they are reached
457 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
459 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
460 # This method is used to manage varargs in signatures and returns the real array
461 # of instances to use in the call.
462 # Return `null` if one of the evaluation of the arguments return null.
463 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: Instance, args
: SequenceRead[AExpr]): nullable Array[Instance]
465 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
466 var res
= new Array[Instance]
469 if msignature
.arity
== 0 then return res
472 assert args
.length
== msignature
.arity
else debug
("Expected {msignature.arity} args, got {args.length}")
474 var e
= self.expr
(ne
)
475 if e
== null then return null
481 # Eval in order of arguments, not parameters
482 var exprs
= new Array[Instance].with_capacity
(args
.length
)
484 var e
= self.expr
(ne
)
485 if e
== null then return null
489 # Fill `res` with the result of the evaluation according to the mapping
490 for i
in [0..msignature
.arity
[ do
491 var param
= msignature
.mparameters
[i
]
492 var j
= map
.map
.get_or_null
(i
)
495 res
.add
(null_instance
)
498 if param
.is_vararg
and args
[i
].vararg_decl
> 0 then
499 var vararg
= exprs
.sub
(j
, args
[i
].vararg_decl
)
500 var elttype
= param
.mtype
.anchor_to
(self.mainmodule
, recv
.mtype
.as(MClassType))
501 var arg
= self.array_instance
(vararg
, elttype
)
510 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
511 # Return a value if `mpropdef` is a function, or null if it is a procedure.
512 # The call is direct/static. There is no message-sending/late-binding.
513 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
515 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
516 self.discover_call_trace
.add mpropdef
517 self.debug
("Discovered {mpropdef}")
519 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
521 # Look for the AST node that implements the property
522 var val
= mpropdef
.constant_value
524 var node
= modelbuilder
.mpropdef2node
(mpropdef
)
525 if mpropdef
.is_abstract
then
527 self.frames
.unshift new_frame
(node
, mpropdef
, args
)
529 fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
533 if node
isa APropdef then
534 self.parameter_check
(node
, mpropdef
, args
)
535 return node
.call
(self, mpropdef
, args
)
536 else if node
isa AClassdef then
537 self.parameter_check
(node
, mpropdef
, args
)
538 return node
.call
(self, mpropdef
, args
)
539 else if node
!= null then
540 fatal
("Fatal Error: method {mpropdef} associated to unexpected AST node {node.location}")
542 else if val
!= null then
543 return value_instance
(val
)
545 fatal
("Fatal Error: method {mpropdef} not found in the AST")
550 # Execute type checks of covariant parameters
551 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
553 var msignature
= mpropdef
.msignature
.as(not null)
554 for i
in [0..msignature
.arity
[ do
555 var mp
= msignature
.mparameters
[i
]
557 # skip test for vararg since the array is instantiated with the correct polymorphic type
558 if mp
.is_vararg
then continue
560 # skip if the cast is not required
561 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
562 if not origmtype
.need_anchor
then continue
564 #print "{mpropdef}: {mpropdef.mproperty.intro.msignature.mparameters[i]}"
566 # get the parameter type
568 var anchor
= args
.first
.mtype
.as(MClassType)
569 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
570 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
571 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
576 # Common code for runtime injected calls and normal calls
577 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
579 if mtype
isa MNullType then
580 if mproperty
.name
== "==" or mproperty
.name
== "is_same_instance" then
581 return self.bool_instance
(args
[0] == args
[1])
582 else if mproperty
.name
== "!=" then
583 return self.bool_instance
(args
[0] != args
[1])
585 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
586 fatal
("Receiver is null")
591 # Execute a full `callsite` for given `args`
592 # Use this method, instead of `send` to execute and control the additional behavior of the call-sites
593 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
595 if callsite
== null then return null
596 var initializers
= callsite
.mpropdef
.initializers
597 if not initializers
.is_empty
then
598 var recv
= arguments
.first
600 for p
in initializers
do
601 if p
isa MMethod then
603 for x
in p
.intro
.msignature
.mparameters
do
604 args
.add arguments
[i
]
608 else if p
isa MAttribute then
609 assert recv
isa MutableInstance
610 write_attribute
(p
, recv
, arguments
[i
])
614 assert i
== arguments
.length
616 return send
(callsite
.mproperty
, [recv
])
618 return send
(callsite
.mproperty
, arguments
)
621 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
622 # Return a value if `mproperty` is a function, or null if it is a procedure.
623 # The call is polymorphic. There is a message-sending/late-binding according to the receiver (args[0]).
624 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
626 var recv
= args
.first
627 var mtype
= recv
.mtype
628 var ret
= send_commons
(mproperty
, args
, mtype
)
629 if ret
!= null then return ret
630 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
631 return self.call
(propdef
, args
)
634 # Read the attribute `mproperty` of an instance `recv` and return its value.
635 # If the attribute in not yet initialized, then aborts with an error message.
636 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
638 assert recv
isa MutableInstance
639 if not recv
.attributes
.has_key
(mproperty
) then
640 fatal
("Uninitialized attribute {mproperty.name}")
643 return recv
.attributes
[mproperty
]
646 # Replace in `recv` the value of the attribute `mproperty` by `value`
647 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
649 assert recv
isa MutableInstance
650 recv
.attributes
[mproperty
] = value
653 # Is the attribute `mproperty` initialized the instance `recv`?
654 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
656 assert recv
isa MutableInstance
657 return recv
.attributes
.has_key
(mproperty
)
660 # Collect attributes of a type in the order of their init
661 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
663 var cache
= self.collect_attr_propdef_cache
664 if cache
.has_key
(mtype
) then return cache
[mtype
]
666 var res
= new Array[AAttrPropdef]
667 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
668 self.mainmodule
.linearize_mclassdefs
(cds
)
670 res
.add_all
(modelbuilder
.collect_attr_propdef
(cd
))
677 private var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
679 # Fill the initial values of the newly created instance `recv`.
680 # `recv.mtype` is used to know what must be filled.
681 fun init_instance
(recv
: Instance)
683 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
684 npropdef
.init_expr
(self, recv
)
688 # A hook to initialize a `PrimitiveInstance`
689 fun init_instance_primitive
(recv
: Instance) do end
691 # This function determines the correct type according to the receiver of the current propdef (self).
692 fun unanchor_type
(mtype
: MType): MType
694 return mtype
.anchor_to
(self.mainmodule
, current_receiver_class
)
697 # Placebo instance used to mark internal error result when `null` already have a meaning.
698 # TODO: replace with multiple return or something better
699 var error_instance
= new MutableInstance(modelbuilder
.model
.null_type
) is lazy
707 # The problematic node, if any
708 var node
: nullable ANode
711 # An instance represents a value of the executed program.
712 abstract class Instance
713 # The dynamic type of the instance
714 # ASSERT: not self.mtype.is_anchored
717 # Return `true` if the instance is the `true` value.
719 # Return `false` if the instance is the `false` value.
720 # Abort if the instance is not a boolean value.
721 fun is_true
: Bool do abort
723 # Return `true` if the instance is null.
724 # Return `false` otherwise.
725 fun is_null
: Bool do return mtype
isa MNullType
727 # Return true if `self` IS `o` (using the Nit semantic of is)
728 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
730 # Human readable object identity "Type#number"
731 redef fun to_s
do return "{mtype}"
733 # Return the integer value if the instance is an integer.
735 fun to_i
: Int do abort
737 # Return the integer value if the instance is a float.
739 fun to_f
: Float do abort
741 # Return the integer value if the instance is a byte.
743 fun to_b
: Byte do abort
745 # Return the integer value if the instance is a int8.
747 fun to_i8
: Int8 do abort
749 # Return the integer value if the instance is a int16.
751 fun to_i16
: Int16 do abort
753 # Return the integer value if the instance is a uint16.
755 fun to_u16
: UInt16 do abort
757 # Return the integer value if the instance is a int32.
759 fun to_i32
: Int32 do abort
761 # Return the integer value if the instance is a uint32.
763 fun to_u32
: UInt32 do abort
765 # The real value encapsulated if the instance is primitive.
767 fun val
: nullable Object do abort
770 # A instance with attribute (standards objects)
771 class MutableInstance
774 # The values of the attributes
775 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
778 # Special instance to handle primitives values (int, bool, etc.)
779 # The trick is just to encapsulate the “real” value.
780 class PrimitiveInstance[E
]
783 # The real value encapsulated
788 if val
== true then return true
789 if val
== false then return false
795 if not o
isa PrimitiveInstance[nullable Object] then return false
796 return self.val
== o
.val
801 if not o
isa PrimitiveInstance[nullable Object] then return false
802 return self.val
.is_same_instance
(o
.val
)
805 redef fun to_s
do return "{mtype}#{val.object_id}({val or else "null"})"
807 redef fun to_i
do return val
.as(Int)
809 redef fun to_f
do return val
.as(Float)
811 redef fun to_b
do return val
.as(Byte)
813 redef fun to_i8
do return val
.as(Int8)
815 redef fun to_i16
do return val
.as(Int16)
817 redef fun to_u16
do return val
.as(UInt16)
819 redef fun to_i32
do return val
.as(Int32)
821 redef fun to_u32
do return val
.as(UInt32)
824 # Information about local variables in a running method
826 # The current visited node
827 # The node is stored by frame to keep a stack trace
828 var current_node
: ANode
829 # The executed property.
830 # A Method in case of a call, an attribute in case of a default initialization.
831 var mpropdef
: MPropDef
832 # Arguments of the method (the first is the receiver)
833 var arguments
: Array[Instance]
834 # Indicate if the expression has an array comprehension form
835 var comprehension
: nullable Array[Instance] = null
838 # Implementation of a Frame with a Hashmap to store local variables
839 class InterpreterFrame
842 # Mapping between a variable and the current value
843 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
847 # Aborts the program with a message
848 # `v` is used to know if a colored message is displayed or not
849 fun fatal
(v
: NaiveInterpreter, message
: String)
851 # Abort if there is a `catch` block
852 if v
.catch_count
> 0 then
853 v
.last_error
= new FatalError(message
, self)
857 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
then
858 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
860 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
861 sys
.stderr
.write
(v
.stack_trace
)
862 sys
.stderr
.write
("\n")
869 # Execute a `mpropdef` associated with the current node.
870 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
872 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
877 redef class AMethPropdef
880 redef fun call
(v
, mpropdef
, args
)
882 var f
= v
.new_frame
(self, mpropdef
, args
)
883 var res
= call_commons
(v
, mpropdef
, args
, f
)
885 if v
.is_escape
(self.return_mark
) then
892 # Execution of the body of the method
894 # It handle the common special cases: super, intern, extern
895 fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
899 for i
in [0..mpropdef
.msignature
.arity
[ do
900 var variable
= self.n_signature
.n_params
[i
].variable
901 assert variable
!= null
902 v
.write_variable
(variable
, arguments
[i
+1])
905 # Call the implicit super-init
906 var auto_super_inits
= self.auto_super_inits
907 if auto_super_inits
!= null then
908 var args
= [arguments
.first
]
909 for auto_super_init
in auto_super_inits
do
911 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
912 args
.add
(arguments
[i
])
914 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
915 v
.callsite
(auto_super_init
, args
)
918 if auto_super_call
then
919 # standard call-next-method
920 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
921 v
.call
(superpd
, arguments
)
925 if mpropdef
.is_intern
or mpropdef
.is_extern
then
926 var res
= intern_call
(v
, mpropdef
, arguments
)
927 if res
!= v
.error_instance
then return res
930 if mpropdef
.is_extern
then
931 var res
= call_extern
(v
, mpropdef
, arguments
, f
)
932 if res
!= v
.error_instance
then return res
935 if n_block
!= null then
940 # Fail if nothing succeed
941 if mpropdef
.is_intern
then
942 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
943 else if mpropdef
.is_extern
then
944 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
946 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
951 # Call this extern method
952 protected fun call_extern
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
954 return v
.error_instance
957 # Interprets a intern or a shortcut extern method.
958 # Returns the result for a function, `null` for a procedure, or `error_instance` if the method is unknown.
959 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
961 var pname
= mpropdef
.mproperty
.name
962 var cname
= mpropdef
.mclassdef
.mclass
.name
963 if pname
== "output" then
964 var recv
= args
.first
967 else if pname
== "object_id" then
968 var recv
= args
.first
969 if recv
isa PrimitiveInstance[Object] then
970 return v
.int_instance
(recv
.val
.object_id
)
972 return v
.int_instance
(recv
.object_id
)
974 else if pname
== "output_class_name" then
975 var recv
= args
.first
978 else if pname
== "native_class_name" then
979 var recv
= args
.first
980 var txt
= recv
.mtype
.to_s
981 return v
.c_string_instance
(txt
)
982 else if pname
== "==" then
983 # == is correctly redefined for instances
984 return v
.bool_instance
(args
[0] == args
[1])
985 else if pname
== "!=" then
986 return v
.bool_instance
(args
[0] != args
[1])
987 else if pname
== "is_same_type" then
988 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
989 else if pname
== "is_same_instance" then
990 return v
.bool_instance
(args
[0].eq_is
(args
[1]))
991 else if pname
== "class_inheritance_metamodel_json" then
992 return v
.c_string_instance
(v
.mainmodule
.flatten_mclass_hierarchy
.to_thin_json
)
993 else if pname
== "exit" then
996 else if pname
== "buffer_mode_full" then
997 return v
.int_instance
(sys
.buffer_mode_full
)
998 else if pname
== "buffer_mode_line" then
999 return v
.int_instance
(sys
.buffer_mode_line
)
1000 else if pname
== "buffer_mode_none" then
1001 return v
.int_instance
(sys
.buffer_mode_none
)
1002 else if pname
== "sys" then
1004 else if cname
== "Int" then
1005 var recvval
= args
[0].to_i
1006 if pname
== "unary -" then
1007 return v
.int_instance
(-recvval
)
1008 else if pname
== "unary +" then
1010 else if pname
== "+" then
1011 return v
.int_instance
(recvval
+ args
[1].to_i
)
1012 else if pname
== "-" then
1013 return v
.int_instance
(recvval
- args
[1].to_i
)
1014 else if pname
== "*" then
1015 return v
.int_instance
(recvval
* args
[1].to_i
)
1016 else if pname
== "%" then
1017 return v
.int_instance
(recvval
% args
[1].to_i
)
1018 else if pname
== "/" then
1019 return v
.int_instance
(recvval
/ args
[1].to_i
)
1020 else if pname
== "<" then
1021 return v
.bool_instance
(recvval
< args
[1].to_i
)
1022 else if pname
== ">" then
1023 return v
.bool_instance
(recvval
> args
[1].to_i
)
1024 else if pname
== "<=" then
1025 return v
.bool_instance
(recvval
<= args
[1].to_i
)
1026 else if pname
== ">=" then
1027 return v
.bool_instance
(recvval
>= args
[1].to_i
)
1028 else if pname
== "<=>" then
1029 return v
.int_instance
(recvval
<=> args
[1].to_i
)
1030 else if pname
== "&" then
1031 return v
.int_instance
(recvval
& args
[1].to_i
)
1032 else if pname
== "|" then
1033 return v
.int_instance
(recvval
| args
[1].to_i
)
1034 else if pname
== "to_f" then
1035 return v
.float_instance
(recvval
.to_f
)
1036 else if pname
== "to_b" then
1037 return v
.byte_instance
(recvval
.to_b
)
1038 else if pname
== "<<" then
1039 return v
.int_instance
(recvval
<< args
[1].to_i
)
1040 else if pname
== ">>" then
1041 return v
.int_instance
(recvval
>> args
[1].to_i
)
1042 else if pname
== "to_i8" then
1043 return v
.int8_instance
(recvval
.to_i8
)
1044 else if pname
== "to_i16" then
1045 return v
.int16_instance
(recvval
.to_i16
)
1046 else if pname
== "to_u16" then
1047 return v
.uint16_instance
(recvval
.to_u16
)
1048 else if pname
== "to_i32" then
1049 return v
.int32_instance
(recvval
.to_i32
)
1050 else if pname
== "to_u32" then
1051 return v
.uint32_instance
(recvval
.to_u32
)
1053 else if cname
== "Byte" then
1054 var recvval
= args
[0].to_b
1055 if pname
== "unary -" then
1056 return v
.byte_instance
(-recvval
)
1057 else if pname
== "unary +" then
1059 else if pname
== "+" then
1060 return v
.byte_instance
(recvval
+ args
[1].to_b
)
1061 else if pname
== "-" then
1062 return v
.byte_instance
(recvval
- args
[1].to_b
)
1063 else if pname
== "*" then
1064 return v
.byte_instance
(recvval
* args
[1].to_b
)
1065 else if pname
== "%" then
1066 return v
.byte_instance
(recvval
% args
[1].to_b
)
1067 else if pname
== "/" then
1068 return v
.byte_instance
(recvval
/ args
[1].to_b
)
1069 else if pname
== "<" then
1070 return v
.bool_instance
(recvval
< args
[1].to_b
)
1071 else if pname
== ">" then
1072 return v
.bool_instance
(recvval
> args
[1].to_b
)
1073 else if pname
== "<=" then
1074 return v
.bool_instance
(recvval
<= args
[1].to_b
)
1075 else if pname
== ">=" then
1076 return v
.bool_instance
(recvval
>= args
[1].to_b
)
1077 else if pname
== "<=>" then
1078 return v
.int_instance
(recvval
<=> args
[1].to_b
)
1079 else if pname
== "&" then
1080 return v
.byte_instance
(recvval
& args
[1].to_b
)
1081 else if pname
== "|" then
1082 return v
.byte_instance
(recvval
| args
[1].to_b
)
1083 else if pname
== "to_f" then
1084 return v
.float_instance
(recvval
.to_f
)
1085 else if pname
== "to_i" then
1086 return v
.int_instance
(recvval
.to_i
)
1087 else if pname
== "<<" then
1088 return v
.byte_instance
(recvval
<< args
[1].to_i
)
1089 else if pname
== ">>" then
1090 return v
.byte_instance
(recvval
>> args
[1].to_i
)
1091 else if pname
== "to_i8" then
1092 return v
.int8_instance
(recvval
.to_i8
)
1093 else if pname
== "to_i16" then
1094 return v
.int16_instance
(recvval
.to_i16
)
1095 else if pname
== "to_u16" then
1096 return v
.uint16_instance
(recvval
.to_u16
)
1097 else if pname
== "to_i32" then
1098 return v
.int32_instance
(recvval
.to_i32
)
1099 else if pname
== "to_u32" then
1100 return v
.uint32_instance
(recvval
.to_u32
)
1101 else if pname
== "byte_to_s_len" then
1102 return v
.int_instance
(recvval
.to_s
.length
)
1104 else if cname
== "Char" then
1105 var recv
= args
[0].val
.as(Char)
1106 if pname
== "successor" then
1107 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
1108 else if pname
== "predecessor" then
1109 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
1110 else if pname
== "<" then
1111 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
1112 else if pname
== ">" then
1113 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
1114 else if pname
== "<=" then
1115 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
1116 else if pname
== ">=" then
1117 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
1118 else if pname
== "<=>" then
1119 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
1121 else if cname
== "Float" then
1122 var recv
= args
[0].to_f
1123 if pname
== "unary -" then
1124 return v
.float_instance
(-recv
)
1125 else if pname
== "unary +" then
1127 else if pname
== "+" then
1128 return v
.float_instance
(recv
+ args
[1].to_f
)
1129 else if pname
== "-" then
1130 return v
.float_instance
(recv
- args
[1].to_f
)
1131 else if pname
== "*" then
1132 return v
.float_instance
(recv
* args
[1].to_f
)
1133 else if pname
== "/" then
1134 return v
.float_instance
(recv
/ args
[1].to_f
)
1135 else if pname
== "<" then
1136 return v
.bool_instance
(recv
< args
[1].to_f
)
1137 else if pname
== ">" then
1138 return v
.bool_instance
(recv
> args
[1].to_f
)
1139 else if pname
== "<=" then
1140 return v
.bool_instance
(recv
<= args
[1].to_f
)
1141 else if pname
== ">=" then
1142 return v
.bool_instance
(recv
>= args
[1].to_f
)
1143 else if pname
== "to_i" then
1144 return v
.int_instance
(recv
.to_i
)
1145 else if pname
== "to_b" then
1146 return v
.byte_instance
(recv
.to_b
)
1147 else if pname
== "to_i8" then
1148 return v
.int8_instance
(recv
.to_i8
)
1149 else if pname
== "to_i16" then
1150 return v
.int16_instance
(recv
.to_i16
)
1151 else if pname
== "to_u16" then
1152 return v
.uint16_instance
(recv
.to_u16
)
1153 else if pname
== "to_i32" then
1154 return v
.int32_instance
(recv
.to_i32
)
1155 else if pname
== "to_u32" then
1156 return v
.uint32_instance
(recv
.to_u32
)
1157 else if pname
== "cos" then
1158 return v
.float_instance
(args
[0].to_f
.cos
)
1159 else if pname
== "sin" then
1160 return v
.float_instance
(args
[0].to_f
.sin
)
1161 else if pname
== "tan" then
1162 return v
.float_instance
(args
[0].to_f
.tan
)
1163 else if pname
== "acos" then
1164 return v
.float_instance
(args
[0].to_f
.acos
)
1165 else if pname
== "asin" then
1166 return v
.float_instance
(args
[0].to_f
.asin
)
1167 else if pname
== "atan" then
1168 return v
.float_instance
(args
[0].to_f
.atan
)
1169 else if pname
== "sqrt" then
1170 return v
.float_instance
(args
[0].to_f
.sqrt
)
1171 else if pname
== "exp" then
1172 return v
.float_instance
(args
[0].to_f
.exp
)
1173 else if pname
== "log" then
1174 return v
.float_instance
(args
[0].to_f
.log
)
1175 else if pname
== "pow" then
1176 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
1177 else if pname
== "abs" then
1178 return v
.float_instance
(args
[0].to_f
.abs
)
1179 else if pname
== "hypot_with" then
1180 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
1181 else if pname
== "is_nan" then
1182 return v
.bool_instance
(args
[0].to_f
.is_nan
)
1183 else if pname
== "is_inf_extern" then
1184 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
1185 else if pname
== "round" then
1186 return v
.float_instance
(args
[0].to_f
.round
)
1188 else if cname
== "CString" then
1189 if pname
== "new" then
1190 return v
.c_string_instance_len
(args
[1].to_i
)
1192 var recvval
= args
.first
.val
.as(CString)
1193 if pname
== "[]" then
1194 var arg1
= args
[1].to_i
1195 return v
.int_instance
(recvval
[arg1
])
1196 else if pname
== "[]=" then
1197 var arg1
= args
[1].to_i
1198 recvval
[arg1
] = args
[2].val
.as(Int)
1200 else if pname
== "copy_to" then
1201 # sig= copy_to(dest: CString, length: Int, from: Int, to: Int)
1202 var destval
= args
[1].val
.as(CString)
1203 var lenval
= args
[2].to_i
1204 var fromval
= args
[3].to_i
1205 var toval
= args
[4].to_i
1206 recvval
.copy_to
(destval
, lenval
, fromval
, toval
)
1208 else if pname
== "atoi" then
1209 return v
.int_instance
(recvval
.atoi
)
1210 else if pname
== "fast_cstring" then
1211 return v
.c_string_instance_fast_cstr
(args
[0].val
.as(CString), args
[1].to_i
)
1212 else if pname
== "fetch_4_chars" then
1213 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_chars
(args
[1].to_i
))
1214 else if pname
== "fetch_4_hchars" then
1215 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_hchars
(args
[1].to_i
))
1216 else if pname
== "utf8_length" then
1217 return v
.int_instance
(args
[0].val
.as(CString).utf8_length
(args
[1].to_i
, args
[2].to_i
))
1219 else if cname
== "NativeArray" then
1220 if pname
== "new" then
1221 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
1222 var instance
= new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
1223 v
.init_instance_primitive
(instance
)
1226 var recvval
= args
.first
.val
.as(Array[Instance])
1227 if pname
== "[]" then
1228 return recvval
[args
[1].to_i
]
1229 else if pname
== "[]=" then
1230 recvval
[args
[1].to_i
] = args
[2]
1232 else if pname
== "length" then
1233 return v
.int_instance
(recvval
.length
)
1234 else if pname
== "copy_to" then
1235 recvval
.copy_to
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
1238 else if cname
== "Int8" then
1239 var recvval
= args
[0].to_i8
1240 if pname
== "unary -" then
1241 return v
.int8_instance
(-recvval
)
1242 else if pname
== "unary +" then
1244 else if pname
== "+" then
1245 return v
.int8_instance
(recvval
+ args
[1].to_i8
)
1246 else if pname
== "-" then
1247 return v
.int8_instance
(recvval
- args
[1].to_i8
)
1248 else if pname
== "*" then
1249 return v
.int8_instance
(recvval
* args
[1].to_i8
)
1250 else if pname
== "%" then
1251 return v
.int8_instance
(recvval
% args
[1].to_i8
)
1252 else if pname
== "/" then
1253 return v
.int8_instance
(recvval
/ args
[1].to_i8
)
1254 else if pname
== "<" then
1255 return v
.bool_instance
(recvval
< args
[1].to_i8
)
1256 else if pname
== ">" then
1257 return v
.bool_instance
(recvval
> args
[1].to_i8
)
1258 else if pname
== "<=" then
1259 return v
.bool_instance
(recvval
<= args
[1].to_i8
)
1260 else if pname
== ">=" then
1261 return v
.bool_instance
(recvval
>= args
[1].to_i8
)
1262 else if pname
== "<=>" then
1263 return v
.int_instance
(recvval
<=> args
[1].to_i8
)
1264 else if pname
== "to_f" then
1265 return v
.float_instance
(recvval
.to_f
)
1266 else if pname
== "to_i" then
1267 return v
.int_instance
(recvval
.to_i
)
1268 else if pname
== "to_b" then
1269 return v
.byte_instance
(recvval
.to_b
)
1270 else if pname
== "to_i16" then
1271 return v
.int16_instance
(recvval
.to_i16
)
1272 else if pname
== "to_u16" then
1273 return v
.uint16_instance
(recvval
.to_u16
)
1274 else if pname
== "to_i32" then
1275 return v
.int32_instance
(recvval
.to_i32
)
1276 else if pname
== "to_u32" then
1277 return v
.uint32_instance
(recvval
.to_u32
)
1278 else if pname
== "<<" then
1279 return v
.int8_instance
(recvval
<< (args
[1].to_i
))
1280 else if pname
== ">>" then
1281 return v
.int8_instance
(recvval
>> (args
[1].to_i
))
1282 else if pname
== "&" then
1283 return v
.int8_instance
(recvval
& args
[1].to_i8
)
1284 else if pname
== "|" then
1285 return v
.int8_instance
(recvval
| args
[1].to_i8
)
1286 else if pname
== "^" then
1287 return v
.int8_instance
(recvval ^ args
[1].to_i8
)
1288 else if pname
== "unary ~" then
1289 return v
.int8_instance
(~recvval
)
1291 else if cname
== "Int16" then
1292 var recvval
= args
[0].to_i16
1293 if pname
== "unary -" then
1294 return v
.int16_instance
(-recvval
)
1295 else if pname
== "unary +" then
1297 else if pname
== "+" then
1298 return v
.int16_instance
(recvval
+ args
[1].to_i16
)
1299 else if pname
== "-" then
1300 return v
.int16_instance
(recvval
- args
[1].to_i16
)
1301 else if pname
== "*" then
1302 return v
.int16_instance
(recvval
* args
[1].to_i16
)
1303 else if pname
== "%" then
1304 return v
.int16_instance
(recvval
% args
[1].to_i16
)
1305 else if pname
== "/" then
1306 return v
.int16_instance
(recvval
/ args
[1].to_i16
)
1307 else if pname
== "<" then
1308 return v
.bool_instance
(recvval
< args
[1].to_i16
)
1309 else if pname
== ">" then
1310 return v
.bool_instance
(recvval
> args
[1].to_i16
)
1311 else if pname
== "<=" then
1312 return v
.bool_instance
(recvval
<= args
[1].to_i16
)
1313 else if pname
== ">=" then
1314 return v
.bool_instance
(recvval
>= args
[1].to_i16
)
1315 else if pname
== "<=>" then
1316 return v
.int_instance
(recvval
<=> args
[1].to_i16
)
1317 else if pname
== "to_f" then
1318 return v
.float_instance
(recvval
.to_f
)
1319 else if pname
== "to_i" then
1320 return v
.int_instance
(recvval
.to_i
)
1321 else if pname
== "to_b" then
1322 return v
.byte_instance
(recvval
.to_b
)
1323 else if pname
== "to_i8" then
1324 return v
.int8_instance
(recvval
.to_i8
)
1325 else if pname
== "to_u16" then
1326 return v
.uint16_instance
(recvval
.to_u16
)
1327 else if pname
== "to_i32" then
1328 return v
.int32_instance
(recvval
.to_i32
)
1329 else if pname
== "to_u32" then
1330 return v
.uint32_instance
(recvval
.to_u32
)
1331 else if pname
== "<<" then
1332 return v
.int16_instance
(recvval
<< (args
[1].to_i
))
1333 else if pname
== ">>" then
1334 return v
.int16_instance
(recvval
>> (args
[1].to_i
))
1335 else if pname
== "&" then
1336 return v
.int16_instance
(recvval
& args
[1].to_i16
)
1337 else if pname
== "|" then
1338 return v
.int16_instance
(recvval
| args
[1].to_i16
)
1339 else if pname
== "^" then
1340 return v
.int16_instance
(recvval ^ args
[1].to_i16
)
1341 else if pname
== "unary ~" then
1342 return v
.int16_instance
(~recvval
)
1344 else if cname
== "UInt16" then
1345 var recvval
= args
[0].to_u16
1346 if pname
== "unary -" then
1347 return v
.uint16_instance
(-recvval
)
1348 else if pname
== "unary +" then
1350 else if pname
== "+" then
1351 return v
.uint16_instance
(recvval
+ args
[1].to_u16
)
1352 else if pname
== "-" then
1353 return v
.uint16_instance
(recvval
- args
[1].to_u16
)
1354 else if pname
== "*" then
1355 return v
.uint16_instance
(recvval
* args
[1].to_u16
)
1356 else if pname
== "%" then
1357 return v
.uint16_instance
(recvval
% args
[1].to_u16
)
1358 else if pname
== "/" then
1359 return v
.uint16_instance
(recvval
/ args
[1].to_u16
)
1360 else if pname
== "<" then
1361 return v
.bool_instance
(recvval
< args
[1].to_u16
)
1362 else if pname
== ">" then
1363 return v
.bool_instance
(recvval
> args
[1].to_u16
)
1364 else if pname
== "<=" then
1365 return v
.bool_instance
(recvval
<= args
[1].to_u16
)
1366 else if pname
== ">=" then
1367 return v
.bool_instance
(recvval
>= args
[1].to_u16
)
1368 else if pname
== "<=>" then
1369 return v
.int_instance
(recvval
<=> args
[1].to_u16
)
1370 else if pname
== "to_f" then
1371 return v
.float_instance
(recvval
.to_f
)
1372 else if pname
== "to_i" then
1373 return v
.int_instance
(recvval
.to_i
)
1374 else if pname
== "to_b" then
1375 return v
.byte_instance
(recvval
.to_b
)
1376 else if pname
== "to_i8" then
1377 return v
.int8_instance
(recvval
.to_i8
)
1378 else if pname
== "to_i16" then
1379 return v
.int16_instance
(recvval
.to_i16
)
1380 else if pname
== "to_i32" then
1381 return v
.int32_instance
(recvval
.to_i32
)
1382 else if pname
== "to_u32" then
1383 return v
.uint32_instance
(recvval
.to_u32
)
1384 else if pname
== "<<" then
1385 return v
.uint16_instance
(recvval
<< (args
[1].to_i
))
1386 else if pname
== ">>" then
1387 return v
.uint16_instance
(recvval
>> (args
[1].to_i
))
1388 else if pname
== "&" then
1389 return v
.uint16_instance
(recvval
& args
[1].to_u16
)
1390 else if pname
== "|" then
1391 return v
.uint16_instance
(recvval
| args
[1].to_u16
)
1392 else if pname
== "^" then
1393 return v
.uint16_instance
(recvval ^ args
[1].to_u16
)
1394 else if pname
== "unary ~" then
1395 return v
.uint16_instance
(~recvval
)
1397 else if cname
== "Int32" then
1398 var recvval
= args
[0].to_i32
1399 if pname
== "unary -" then
1400 return v
.int32_instance
(-recvval
)
1401 else if pname
== "unary +" then
1403 else if pname
== "+" then
1404 return v
.int32_instance
(recvval
+ args
[1].to_i32
)
1405 else if pname
== "-" then
1406 return v
.int32_instance
(recvval
- args
[1].to_i32
)
1407 else if pname
== "*" then
1408 return v
.int32_instance
(recvval
* args
[1].to_i32
)
1409 else if pname
== "%" then
1410 return v
.int32_instance
(recvval
% args
[1].to_i32
)
1411 else if pname
== "/" then
1412 return v
.int32_instance
(recvval
/ args
[1].to_i32
)
1413 else if pname
== "<" then
1414 return v
.bool_instance
(recvval
< args
[1].to_i32
)
1415 else if pname
== ">" then
1416 return v
.bool_instance
(recvval
> args
[1].to_i32
)
1417 else if pname
== "<=" then
1418 return v
.bool_instance
(recvval
<= args
[1].to_i32
)
1419 else if pname
== ">=" then
1420 return v
.bool_instance
(recvval
>= args
[1].to_i32
)
1421 else if pname
== "<=>" then
1422 return v
.int_instance
(recvval
<=> args
[1].to_i32
)
1423 else if pname
== "to_f" then
1424 return v
.float_instance
(recvval
.to_f
)
1425 else if pname
== "to_i" then
1426 return v
.int_instance
(recvval
.to_i
)
1427 else if pname
== "to_b" then
1428 return v
.byte_instance
(recvval
.to_b
)
1429 else if pname
== "to_i8" then
1430 return v
.int8_instance
(recvval
.to_i8
)
1431 else if pname
== "to_i16" then
1432 return v
.int16_instance
(recvval
.to_i16
)
1433 else if pname
== "to_u16" then
1434 return v
.uint16_instance
(recvval
.to_u16
)
1435 else if pname
== "to_u32" then
1436 return v
.uint32_instance
(recvval
.to_u32
)
1437 else if pname
== "<<" then
1438 return v
.int32_instance
(recvval
<< (args
[1].to_i
))
1439 else if pname
== ">>" then
1440 return v
.int32_instance
(recvval
>> (args
[1].to_i
))
1441 else if pname
== "&" then
1442 return v
.int32_instance
(recvval
& args
[1].to_i32
)
1443 else if pname
== "|" then
1444 return v
.int32_instance
(recvval
| args
[1].to_i32
)
1445 else if pname
== "^" then
1446 return v
.int32_instance
(recvval ^ args
[1].to_i32
)
1447 else if pname
== "unary ~" then
1448 return v
.int32_instance
(~recvval
)
1450 else if cname
== "UInt32" then
1451 var recvval
= args
[0].to_u32
1452 if pname
== "unary -" then
1453 return v
.uint32_instance
(-recvval
)
1454 else if pname
== "unary +" then
1456 else if pname
== "+" then
1457 return v
.uint32_instance
(recvval
+ args
[1].to_u32
)
1458 else if pname
== "-" then
1459 return v
.uint32_instance
(recvval
- args
[1].to_u32
)
1460 else if pname
== "*" then
1461 return v
.uint32_instance
(recvval
* args
[1].to_u32
)
1462 else if pname
== "%" then
1463 return v
.uint32_instance
(recvval
% args
[1].to_u32
)
1464 else if pname
== "/" then
1465 return v
.uint32_instance
(recvval
/ args
[1].to_u32
)
1466 else if pname
== "<" then
1467 return v
.bool_instance
(recvval
< args
[1].to_u32
)
1468 else if pname
== ">" then
1469 return v
.bool_instance
(recvval
> args
[1].to_u32
)
1470 else if pname
== "<=" then
1471 return v
.bool_instance
(recvval
<= args
[1].to_u32
)
1472 else if pname
== ">=" then
1473 return v
.bool_instance
(recvval
>= args
[1].to_u32
)
1474 else if pname
== "<=>" then
1475 return v
.int_instance
(recvval
<=> args
[1].to_u32
)
1476 else if pname
== "to_f" then
1477 return v
.float_instance
(recvval
.to_f
)
1478 else if pname
== "to_i" then
1479 return v
.int_instance
(recvval
.to_i
)
1480 else if pname
== "to_b" then
1481 return v
.byte_instance
(recvval
.to_b
)
1482 else if pname
== "to_i8" then
1483 return v
.int8_instance
(recvval
.to_i8
)
1484 else if pname
== "to_i16" then
1485 return v
.int16_instance
(recvval
.to_i16
)
1486 else if pname
== "to_u16" then
1487 return v
.uint16_instance
(recvval
.to_u16
)
1488 else if pname
== "to_i32" then
1489 return v
.int32_instance
(recvval
.to_i32
)
1490 else if pname
== "<<" then
1491 return v
.uint32_instance
(recvval
<< (args
[1].to_i
))
1492 else if pname
== ">>" then
1493 return v
.uint32_instance
(recvval
>> (args
[1].to_i
))
1494 else if pname
== "&" then
1495 return v
.uint32_instance
(recvval
& args
[1].to_u32
)
1496 else if pname
== "|" then
1497 return v
.uint32_instance
(recvval
| args
[1].to_u32
)
1498 else if pname
== "^" then
1499 return v
.uint32_instance
(recvval ^ args
[1].to_u32
)
1500 else if pname
== "unary ~" then
1501 return v
.uint32_instance
(~recvval
)
1503 else if pname
== "native_argc" then
1504 return v
.int_instance
(v
.arguments
.length
)
1505 else if pname
== "native_argv" then
1506 var txt
= v
.arguments
[args
[1].to_i
]
1507 return v
.c_string_instance
(txt
)
1508 else if pname
== "lexer_goto" then
1509 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
1510 else if pname
== "lexer_accept" then
1511 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
1512 else if pname
== "parser_goto" then
1513 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
1514 else if pname
== "parser_action" then
1515 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
1517 return v
.error_instance
1521 redef class AAttrPropdef
1522 redef fun call
(v
, mpropdef
, args
)
1524 var recv
= args
.first
1525 assert recv
isa MutableInstance
1526 var attr
= self.mpropdef
.mproperty
1527 if mpropdef
== mreadpropdef
then
1528 assert args
.length
== 1
1529 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
1530 var f
= v
.new_frame
(self, mpropdef
, args
)
1531 return evaluate_expr
(v
, recv
, f
)
1532 else if mpropdef
== mwritepropdef
then
1533 assert args
.length
== 2
1535 if is_optional
and arg
.is_null
then
1536 var f
= v
.new_frame
(self, mpropdef
, args
)
1537 arg
= evaluate_expr
(v
, recv
, f
)
1539 v
.write_attribute
(attr
, recv
, arg
)
1546 # Evaluate and set the default value of the attribute in `recv`
1547 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1549 if is_lazy
or is_optional
then return
1551 var f
= v
.new_frame
(self, mreadpropdef
.as(not null), [recv
])
1552 evaluate_expr
(v
, recv
, f
)
1555 var mpropdef
= self.mpropdef
1556 if mpropdef
== null then return
1557 var mtype
= self.mtype
.as(not null)
1558 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1559 if mtype
isa MNullableType then
1560 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1564 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance, f
: Frame): Instance
1566 assert recv
isa MutableInstance
1571 var nexpr
= self.n_expr
1572 var nblock
= self.n_block
1573 if nexpr
!= null then
1575 else if nblock
!= null then
1577 assert v
.escapemark
== return_mark
1586 assert not v
.is_escaping
1587 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1592 redef class AClassdef
1593 # Execute an implicit `mpropdef` associated with the current node.
1594 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance]): nullable Instance
1596 if mpropdef
.mproperty
.is_root_init
then
1597 assert arguments
.length
== 1
1598 if not mpropdef
.is_intro
then
1599 # standard call-next-method
1600 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
1601 v
.call
(superpd
, arguments
)
1611 # Evaluate the node as a possible expression.
1612 # Return a possible value
1613 # NOTE: Do not call this method directly, but use `v.expr`
1614 # This method is here to be implemented by subclasses.
1615 protected fun expr
(v
: NaiveInterpreter): nullable Instance
1617 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1621 # Evaluate the node as a statement.
1622 # NOTE: Do not call this method directly, but use `v.stmt`
1623 # This method is here to be implemented by subclasses (no need to return something).
1624 protected fun stmt
(v
: NaiveInterpreter)
1631 redef class ABlockExpr
1634 var last
= self.n_expr
.last
1635 for e
in self.n_expr
do
1636 if e
== last
then break
1638 if v
.is_escaping
then return null
1645 for e
in self.n_expr
do
1647 if v
.is_escaping
then return
1652 redef class AVardeclExpr
1655 var ne
= self.n_expr
1658 if i
== null then return null
1659 v
.write_variable
(self.variable
.as(not null), i
)
1666 redef class AVarExpr
1669 return v
.read_variable
(self.variable
.as(not null))
1673 redef class AVarAssignExpr
1676 var i
= v
.expr
(self.n_value
)
1677 if i
== null then return null
1678 v
.write_variable
(self.variable
.as(not null), i
)
1683 redef class AVarReassignExpr
1686 var variable
= self.variable
.as(not null)
1687 var vari
= v
.read_variable
(variable
)
1688 var value
= v
.expr
(self.n_value
)
1689 if value
== null then return
1690 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1692 v
.write_variable
(variable
, res
)
1696 redef class ASelfExpr
1699 return v
.frame
.arguments
.first
1703 redef class AImplicitSelfExpr
1706 if not is_sys
then return super
1711 redef class AEscapeExpr
1714 var ne
= self.n_expr
1717 if i
== null then return
1720 v
.escapevalue
= null
1722 v
.escapemark
= self.escapemark
1726 redef class AAbortExpr
1737 var cond
= v
.expr
(self.n_expr
)
1738 if cond
== null then return null
1739 if cond
.is_true
then
1740 return v
.expr
(self.n_then
.as(not null))
1742 return v
.expr
(self.n_else
.as(not null))
1748 var cond
= v
.expr
(self.n_expr
)
1749 if cond
== null then return
1750 if cond
.is_true
then
1758 redef class AIfexprExpr
1761 var cond
= v
.expr
(self.n_expr
)
1762 if cond
== null then return null
1763 if cond
.is_true
then
1764 return v
.expr
(self.n_then
)
1766 return v
.expr
(self.n_else
)
1774 # If this bloc has a catch, handle it with a do ... catch ... end
1775 if self.n_catch
!= null then
1779 v
.stmt
(self.n_block
)
1780 v
.is_escape
(self.break_mark
) # Clear the break (if any)
1783 # Restore the current frame if needed
1784 while v
.frame
!= frame
do v
.frames
.shift
1786 v
.stmt
(self.n_catch
)
1789 v
.stmt
(self.n_block
)
1790 v
.is_escape
(self.break_mark
)
1795 redef class AWhileExpr
1799 var cond
= v
.expr
(self.n_expr
)
1800 if cond
== null then return
1801 if not cond
.is_true
then return
1802 v
.stmt
(self.n_block
)
1803 if v
.is_escape
(self.break_mark
) then return
1804 v
.is_escape
(self.continue_mark
) # Clear the break
1805 if v
.is_escaping
then return
1810 redef class ALoopExpr
1814 v
.stmt
(self.n_block
)
1815 if v
.is_escape
(self.break_mark
) then return
1816 v
.is_escape
(self.continue_mark
) # Clear the break
1817 if v
.is_escaping
then return
1822 redef class AForExpr
1825 var iters
= new Array[Instance]
1827 for g
in n_groups
do
1828 var col
= v
.expr
(g
.n_expr
)
1829 if col
== null then return
1830 if col
.is_null
then fatal
(v
, "Receiver is null")
1832 var iter
= v
.callsite
(g
.method_iterator
, [col
]).as(not null)
1837 for g
in n_groups
, iter
in iters
do
1838 var isok
= v
.callsite
(g
.method_is_ok
, [iter
]).as(not null)
1839 if not isok
.is_true
then break label
1840 if g
.variables
.length
== 1 then
1841 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1842 #self.debug("item {item}")
1843 v
.write_variable
(g
.variables
.first
, item
)
1844 else if g
.variables
.length
== 2 then
1845 var key
= v
.callsite
(g
.method_key
, [iter
]).as(not null)
1846 v
.write_variable
(g
.variables
[0], key
)
1847 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1848 v
.write_variable
(g
.variables
[1], item
)
1853 v
.stmt
(self.n_block
)
1854 if v
.is_escape
(self.break_mark
) then break
1855 v
.is_escape
(self.continue_mark
) # Clear the break
1856 if v
.is_escaping
then break
1857 for g
in n_groups
, iter
in iters
do
1858 v
.callsite
(g
.method_next
, [iter
])
1861 for g
in n_groups
, iter
in iters
do
1862 var method_finish
= g
.method_finish
1863 if method_finish
!= null then
1864 v
.callsite
(method_finish
, [iter
])
1870 redef class AWithExpr
1873 var expr
= v
.expr
(self.n_expr
)
1874 if expr
== null then return
1876 v
.callsite
(method_start
, [expr
])
1877 v
.stmt
(self.n_block
)
1878 v
.is_escape
(self.break_mark
) # Clear the break
1880 # Execute the finally without an escape
1881 var old_mark
= v
.escapemark
1883 v
.callsite
(method_finish
, [expr
])
1884 # Restore the escape unless another escape was provided
1885 if v
.escapemark
== null then v
.escapemark
= old_mark
1889 redef class AAssertExpr
1892 var cond
= v
.expr
(self.n_expr
)
1893 if cond
== null then return
1894 if not cond
.is_true
then
1896 if v
.is_escaping
then return
1898 # Explain assert if it fails
1899 var explain_assert_str
= explain_assert_str
1900 if explain_assert_str
!= null then
1901 var i
= v
.expr
(explain_assert_str
)
1902 if i
isa MutableInstance then
1903 var res
= v
.send
(v
.force_get_primitive_method
("to_cstring", i
.mtype
), [i
])
1907 print_error
"Runtime assert: {val.to_s}"
1915 fatal
(v
, "Assert '{nid.text}' failed")
1917 fatal
(v
, "Assert failed")
1927 var cond
= v
.expr
(self.n_expr
)
1928 if cond
== null then return null
1929 if cond
.is_true
then return cond
1930 return v
.expr
(self.n_expr2
)
1934 redef class AImpliesExpr
1937 var cond
= v
.expr
(self.n_expr
)
1938 if cond
== null then return null
1939 if not cond
.is_true
then return v
.true_instance
1940 return v
.expr
(self.n_expr2
)
1944 redef class AAndExpr
1947 var cond
= v
.expr
(self.n_expr
)
1948 if cond
== null then return null
1949 if not cond
.is_true
then return cond
1950 return v
.expr
(self.n_expr2
)
1954 redef class ANotExpr
1957 var cond
= v
.expr
(self.n_expr
)
1958 if cond
== null then return null
1959 return v
.bool_instance
(not cond
.is_true
)
1963 redef class AOrElseExpr
1966 var i
= v
.expr
(self.n_expr
)
1967 if i
== null then return null
1968 if i
!= v
.null_instance
then return i
1969 return v
.expr
(self.n_expr2
)
1973 redef class AIntegerExpr
1976 if value
isa Int then return v
.int_instance
(value
.as(Int))
1977 if value
isa Byte then return v
.byte_instance
(value
.as(Byte))
1978 if value
isa Int8 then return v
.int8_instance
(value
.as(Int8))
1979 if value
isa Int16 then return v
.int16_instance
(value
.as(Int16))
1980 if value
isa UInt16 then return v
.uint16_instance
(value
.as(UInt16))
1981 if value
isa Int32 then return v
.int32_instance
(value
.as(Int32))
1982 if value
isa UInt32 then return v
.uint32_instance
(value
.as(UInt32))
1987 redef class AFloatExpr
1990 return v
.float_instance
(self.value
.as(not null))
1994 redef class ACharExpr
1997 if is_code_point
then
1998 return v
.int_instance
(self.value
.as(not null).code_point
)
2000 return v
.char_instance
(self.value
.as(not null))
2004 redef class AArrayExpr
2007 var val
= new Array[Instance]
2008 var old_comprehension
= v
.frame
.comprehension
2009 v
.frame
.comprehension
= val
2010 for nexpr
in self.n_exprs
do
2011 if nexpr
isa AForExpr then
2014 var i
= v
.expr
(nexpr
)
2015 if i
== null then return null
2019 v
.frame
.comprehension
= old_comprehension
2020 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
2021 var elttype
= mtype
.arguments
.first
2022 return v
.array_instance
(val
, elttype
)
2026 redef class AugmentedStringFormExpr
2027 # Factorize the making of a `Regex` object from a literal prefixed string
2028 fun make_re
(v
: NaiveInterpreter, rs
: Instance): nullable Instance do
2031 var res
= v
.callsite
(tore
, [rs
])
2033 print
"Cannot call property `to_re` on {self}"
2036 for j
in suffix
.chars
do
2038 var prop
= ignore_case
2040 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2046 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2052 v
.callsite
(prop
, [res
, v
.bool_instance
(false)])
2055 # Should not happen, this needs to be updated
2056 # along with the addition of new suffixes
2063 redef class AStringFormExpr
2064 redef fun expr
(v
) do return v
.string_instance
(value
)
2067 redef class AStringExpr
2068 redef fun expr
(v
) do
2069 var s
= v
.string_instance
(value
)
2070 if is_string
then return s
2071 if is_bytestring
then
2072 var ns
= v
.c_string_instance_from_ns
(bytes
.items
, bytes
.length
)
2073 var ln
= v
.int_instance
(bytes
.length
)
2074 var prop
= to_bytes_with_copy
2076 var res
= v
.callsite
(prop
, [ns
, ln
])
2078 print
"Cannot call property `to_bytes` on {self}"
2083 var res
= make_re
(v
, s
)
2087 print
"Unimplemented prefix or suffix for {self}"
2094 redef class ASuperstringExpr
2097 var array
= new Array[Instance]
2098 for nexpr
in n_exprs
do
2099 var i
= v
.expr
(nexpr
)
2100 if i
== null then return null
2103 var i
= v
.array_instance
(array
, v
.mainmodule
.object_type
)
2104 var res
= v
.send
(v
.force_get_primitive_method
("plain_to_s", i
.mtype
), [i
])
2106 if is_re
then res
= make_re
(v
, res
)
2111 redef class ACrangeExpr
2114 var e1
= v
.expr
(self.n_expr
)
2115 if e1
== null then return null
2116 var e2
= v
.expr
(self.n_expr2
)
2117 if e2
== null then return null
2118 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2119 var res
= new MutableInstance(mtype
)
2120 v
.init_instance
(res
)
2121 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2126 redef class AOrangeExpr
2129 var e1
= v
.expr
(self.n_expr
)
2130 if e1
== null then return null
2131 var e2
= v
.expr
(self.n_expr2
)
2132 if e2
== null then return null
2133 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2134 var res
= new MutableInstance(mtype
)
2135 v
.init_instance
(res
)
2136 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2141 redef class ATrueExpr
2144 return v
.bool_instance
(true)
2148 redef class AFalseExpr
2151 return v
.bool_instance
(false)
2155 redef class ANullExpr
2158 return v
.null_instance
2162 redef class AIsaExpr
2165 var i
= v
.expr
(self.n_expr
)
2166 if i
== null then return null
2167 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
2168 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
2172 redef class AAsCastExpr
2175 var i
= v
.expr
(self.n_expr
)
2176 if i
== null then return null
2177 var mtype
= self.mtype
.as(not null)
2178 var amtype
= v
.unanchor_type
(mtype
)
2179 if not v
.is_subtype
(i
.mtype
, amtype
) then
2180 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
2186 redef class AAsNotnullExpr
2189 var i
= v
.expr
(self.n_expr
)
2190 if i
== null then return null
2192 fatal
(v
, "Cast failed")
2198 redef class AParExpr
2201 return v
.expr
(self.n_expr
)
2205 redef class AOnceExpr
2208 if v
.onces
.has_key
(self) then
2209 return v
.onces
[self]
2211 var res
= v
.expr
(self.n_expr
)
2212 if res
== null then return null
2219 redef class ASendExpr
2222 var recv
= v
.expr
(self.n_expr
)
2223 if recv
== null then return null
2225 # Safe call shortcut if recv is null
2226 if is_safe
and recv
.is_null
then
2230 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2231 if args
== null then return null
2233 var res
= v
.callsite
(callsite
, args
)
2238 redef class ACallrefExpr
2241 fatal
(v
, "NOT YET IMPLEMENTED callref expressions.")
2246 redef class ASendReassignFormExpr
2249 var recv
= v
.expr
(self.n_expr
)
2250 if recv
== null then return
2251 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2252 if args
== null then return
2253 var value
= v
.expr
(self.n_value
)
2254 if value
== null then return
2256 var read
= v
.callsite
(callsite
, args
)
2259 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
2260 assert write
!= null
2264 v
.callsite
(write_callsite
, args
)
2268 redef class ASuperExpr
2271 var recv
= v
.frame
.arguments
.first
2273 var callsite
= self.callsite
2274 if callsite
!= null then
2276 if self.n_args
.n_exprs
.is_empty
then
2277 # Add automatic arguments for the super init call
2279 for i
in [0..callsite
.msignature
.arity
[ do
2280 args
.add
(v
.frame
.arguments
[i
+1])
2283 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2284 if args
== null then return null
2288 var res
= v
.callsite
(callsite
, args
)
2292 # Standard call-next-method
2293 var mpropdef
= self.mpropdef
2294 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
2297 if self.n_args
.n_exprs
.is_empty
then
2298 args
= v
.frame
.arguments
2300 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
2301 if args
== null then return null
2304 var res
= v
.call
(mpropdef
, args
)
2309 redef class ANewExpr
2312 var mtype
= v
.unanchor_type
(self.recvtype
.as(not null))
2313 var recv
: Instance = new MutableInstance(mtype
)
2314 v
.init_instance
(recv
)
2315 var callsite
= self.callsite
2316 if callsite
== null then return recv
2318 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2319 if args
== null then return null
2320 var res2
= v
.callsite
(callsite
, args
)
2321 if res2
!= null then
2322 #self.debug("got {res2} from {mproperty}. drop {recv}")
2329 redef class AAttrExpr
2332 var recv
= v
.expr
(self.n_expr
)
2333 if recv
== null then return null
2334 if recv
.is_null
then fatal
(v
, "Receiver is null")
2335 var mproperty
= self.mproperty
.as(not null)
2336 return v
.read_attribute
(mproperty
, recv
)
2340 redef class AAttrAssignExpr
2343 var recv
= v
.expr
(self.n_expr
)
2344 if recv
== null then return
2345 if recv
.is_null
then fatal
(v
, "Receiver is null")
2346 var i
= v
.expr
(self.n_value
)
2347 if i
== null then return
2348 var mproperty
= self.mproperty
.as(not null)
2349 v
.write_attribute
(mproperty
, recv
, i
)
2353 redef class AAttrReassignExpr
2356 var recv
= v
.expr
(self.n_expr
)
2357 if recv
== null then return
2358 if recv
.is_null
then fatal
(v
, "Receiver is null")
2359 var value
= v
.expr
(self.n_value
)
2360 if value
== null then return
2361 var mproperty
= self.mproperty
.as(not null)
2362 var attr
= v
.read_attribute
(mproperty
, recv
)
2363 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
2365 v
.write_attribute
(mproperty
, recv
, res
)
2369 redef class AIssetAttrExpr
2372 var recv
= v
.expr
(self.n_expr
)
2373 if recv
== null then return null
2374 if recv
.is_null
then fatal
(v
, "Receiver is null")
2375 var mproperty
= self.mproperty
.as(not null)
2376 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
2380 redef class AVarargExpr
2383 return v
.expr
(self.n_expr
)
2387 redef class ASafeExpr
2390 return v
.expr
(self.n_expr
)
2394 redef class ANamedargExpr
2397 return v
.expr
(self.n_expr
)
2401 redef class ADebugTypeExpr