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
25 private import model
::serialize_model
26 private import frontend
::explain_assert_api
28 redef class ToolContext
29 # --discover-call-trace
30 var opt_discover_call_trace
= new OptionBool("Trace calls of the first invocation of methods", "--discover-call-trace")
35 self.option_context
.add_option
(self.opt_discover_call_trace
)
39 redef class ModelBuilder
40 # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
41 # `arguments` are the command-line arguments in order
43 # 1. the AST is fully loaded.
44 # 2. the model is fully built.
45 # 3. the instructions are fully analysed.
46 fun run_naive_interpreter
(mainmodule
: MModule, arguments
: Array[String])
49 self.toolcontext
.info
("*** START INTERPRETING ***", 1)
51 var interpreter
= new NaiveInterpreter(self, mainmodule
, arguments
)
52 interpreter
.start
(mainmodule
)
55 self.toolcontext
.info
("*** END INTERPRETING: {time1-time0} ***", 2)
59 # The visitor that interprets the Nit Program by walking on the AST
60 class NaiveInterpreter
61 # The modelbuilder that know the AST and its associations with the model
62 var modelbuilder
: ModelBuilder
64 # The main module of the program (used to lookup method)
65 var mainmodule
: MModule is writable
67 # The command line arguments of the interpreted program
68 # arguments.first is the program name
69 # arguments[1] is the first argument
70 var arguments
: Array[String]
72 # The main Sys instance
73 var mainobj
: nullable Instance is noinit
77 if mainmodule
.model
.get_mclasses_by_name
("Bool") != null then
78 self.true_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, true)
79 init_instance_primitive
(self.true_instance
)
80 self.false_instance
= new PrimitiveInstance[Bool](mainmodule
.bool_type
, false)
81 init_instance_primitive
(self.false_instance
)
83 self.null_instance
= new PrimitiveInstance[nullable Object](mainmodule
.model
.null_type
, null)
86 # Starts the interpreter on the main module of a program
87 fun start
(mainmodule
: MModule) do
88 var interpreter
= self
89 var sys_type
= mainmodule
.sys_type
90 if sys_type
== null then return # no class Sys
91 var mainobj
= new MutableInstance(sys_type
)
92 interpreter
.mainobj
= mainobj
93 interpreter
.init_instance
(mainobj
)
94 var initprop
= mainmodule
.try_get_primitive_method
("init", sys_type
.mclass
)
95 if initprop
!= null then
96 interpreter
.send
(initprop
, [mainobj
])
98 var mainprop
= mainmodule
.try_get_primitive_method
("run", sys_type
.mclass
) or else
99 mainmodule
.try_get_primitive_method
("main", sys_type
.mclass
)
100 if mainprop
!= null then
101 interpreter
.send
(mainprop
, [mainobj
])
105 # Subtype test in the context of the mainmodule
106 fun is_subtype
(sub
, sup
: MType): Bool
108 return sub
.is_subtype
(self.mainmodule
, current_receiver_class
, sup
)
111 # Get a primitive method in the context of the main module
112 fun force_get_primitive_method
(name
: String, recv
: MType): MMethod
114 assert recv
isa MClassType
115 return self.modelbuilder
.force_get_primitive_method
(current_node
, name
, recv
.mclass
, self.mainmodule
)
118 # Is a return, a break or a continue executed?
119 # Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
120 var escapemark
: nullable EscapeMark = null
122 # The count of `catch` blocs that have been encountered and can catch an abort
123 var catch_count
= 0 is writable
125 # The last error thrown on abort/runtime error where catch_count > 0
126 var last_error
: nullable FatalError = null
128 # Is a return or a break or a continue executed?
129 # Use this function to know if you must skip the evaluation of statements
130 fun is_escaping
: Bool do return escapemark
!= null
132 # The value associated with the current return/break/continue, if any.
133 # Set the value when you set a escapemark.
134 # Read the value when you catch a mark or reach the end of a method
135 var escapevalue
: nullable Instance = null
137 # If there is a break/continue and is associated with `escapemark`, then return true and clear the mark.
138 # If there is no break/continue or if `escapemark` is null then return false.
139 # Use this function to catch a potential break/continue.
140 fun is_escape
(escapemark
: nullable EscapeMark): Bool
142 if escapemark
!= null and self.escapemark
== escapemark
then
143 self.escapemark
= null
150 # Evaluate `n` as an expression in the current context.
151 # Return the value of the expression.
152 # If `n` cannot be evaluated, then aborts.
153 fun expr
(n
: AExpr): nullable Instance
155 var frame
= self.frame
156 var old
= frame
.current_node
157 frame
.current_node
= n
158 #n.debug("IN Execute expr")
160 if i
== null and not self.is_escaping
then
161 n
.debug
("inconsitance: no value and not escaping.")
163 var implicit_cast_to
= n
.implicit_cast_to
164 if i
!= null and implicit_cast_to
!= null then
165 var mtype
= self.unanchor_type
(implicit_cast_to
)
166 if not self.is_subtype
(i
.mtype
, mtype
) then n
.fatal
(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
169 #n.debug("OUT Execute expr: value is {i}")
170 #if not is_subtype(i.mtype, n.mtype.as(not null)) then n.debug("Expected {n.mtype.as(not null)} got {i}")
171 frame
.current_node
= old
175 # Evaluate `n` as a statement in the current context.
176 # Do nothing if `n` is null.
177 # If `n` cannot be evaluated, then aborts.
178 fun stmt
(n
: nullable AExpr)
180 if n
== null then return
182 if n
.comprehension
!= null then
183 var comprehension
= frame
.comprehension
.as(not null)
185 if i
!= null then comprehension
.add
(i
)
189 var frame
= self.frame
190 var old
= frame
.current_node
191 frame
.current_node
= n
193 frame
.current_node
= old
196 # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
197 var onces
: Map[ANode, Instance] = new HashMap[ANode, Instance]
199 # Return the boolean instance associated with `val`.
200 fun bool_instance
(val
: Bool): Instance
202 if val
then return self.true_instance
else return self.false_instance
205 # Return the integer instance associated with `val`.
206 fun int_instance
(val
: Int): Instance
208 var t
= mainmodule
.int_type
209 var instance
= new PrimitiveInstance[Int](t
, val
)
210 init_instance_primitive
(instance
)
214 # Return the byte instance associated with `val`.
215 fun byte_instance
(val
: Byte): Instance
217 var t
= mainmodule
.byte_type
218 var instance
= new PrimitiveInstance[Byte](t
, val
)
219 init_instance_primitive
(instance
)
223 # Return the int8 instance associated with `val`.
224 fun int8_instance
(val
: Int8): Instance
226 var t
= mainmodule
.int8_type
227 var instance
= new PrimitiveInstance[Int8](t
, val
)
228 init_instance_primitive
(instance
)
232 # Return the int16 instance associated with `val`.
233 fun int16_instance
(val
: Int16): Instance
235 var t
= mainmodule
.int16_type
236 var instance
= new PrimitiveInstance[Int16](t
, val
)
237 init_instance_primitive
(instance
)
241 # Return the uint16 instance associated with `val`.
242 fun uint16_instance
(val
: UInt16): Instance
244 var t
= mainmodule
.uint16_type
245 var instance
= new PrimitiveInstance[UInt16](t
, val
)
246 init_instance_primitive
(instance
)
250 # Return the int32 instance associated with `val`.
251 fun int32_instance
(val
: Int32): Instance
253 var t
= mainmodule
.int32_type
254 var instance
= new PrimitiveInstance[Int32](t
, val
)
255 init_instance_primitive
(instance
)
259 # Return the uint32 instance associated with `val`.
260 fun uint32_instance
(val
: UInt32): Instance
262 var t
= mainmodule
.uint32_type
263 var instance
= new PrimitiveInstance[UInt32](t
, val
)
264 init_instance_primitive
(instance
)
268 # Return the char instance associated with `val`.
269 fun char_instance
(val
: Char): Instance
271 var t
= mainmodule
.char_type
272 var instance
= new PrimitiveInstance[Char](t
, val
)
273 init_instance_primitive
(instance
)
277 # Return the float instance associated with `val`.
278 fun float_instance
(val
: Float): Instance
280 var t
= mainmodule
.float_type
281 var instance
= new PrimitiveInstance[Float](t
, val
)
282 init_instance_primitive
(instance
)
286 # The unique instance of the `true` value.
287 var true_instance
: Instance is noinit
289 # The unique instance of the `false` value.
290 var false_instance
: Instance is noinit
292 # The unique instance of the `null` value.
293 var null_instance
: Instance is noinit
295 # Return a new array made of `values`.
296 # The dynamic type of the result is Array[elttype].
297 fun array_instance
(values
: Array[Instance], elttype
: MType): Instance
299 assert not elttype
.need_anchor
300 var nat
= new PrimitiveInstance[Array[Instance]](mainmodule
.native_array_type
(elttype
), values
)
301 init_instance_primitive
(nat
)
302 var mtype
= mainmodule
.array_type
(elttype
)
303 var res
= new MutableInstance(mtype
)
304 self.init_instance
(res
)
305 self.send
(self.force_get_primitive_method
("with_native", mtype
), [res
, nat
, self.int_instance
(values
.length
)])
309 # Return a instance associated to a primitive class
310 # Current primitive classes are `Int`, `Bool`, and `String`
311 fun value_instance
(object
: Object): Instance
313 if object
isa Int then
314 return int_instance
(object
)
315 else if object
isa Bool then
316 return bool_instance
(object
)
317 else if object
isa String then
318 return string_instance
(object
)
324 # Return a new C string initialized with `txt`
325 fun c_string_instance
(txt
: String): Instance
327 var instance
= c_string_instance_len
(txt
.byte_length
+1)
328 var val
= instance
.val
329 val
[txt
.byte_length
] = 0u8
330 txt
.to_cstring
.copy_to
(val
, txt
.byte_length
, 0, 0)
335 # Return a new C string initialized with `txt`
336 fun c_string_instance_from_ns
(txt
: CString, len
: Int): Instance
338 var instance
= c_string_instance_len
(len
)
339 var val
= instance
.val
340 txt
.copy_to
(val
, len
, 0, 0)
345 # Return a new C string initialized of `length`
346 fun c_string_instance_len
(length
: Int): PrimitiveInstance[CString]
348 var val
= new CString(length
)
350 var t
= mainmodule
.c_string_type
351 var instance
= new PrimitiveInstance[CString](t
, val
)
352 init_instance_primitive
(instance
)
356 # Return a new String instance for `txt`
357 fun string_instance
(txt
: String): Instance
359 var nat
= c_string_instance
(txt
)
360 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
])
365 # The virtual type of the frames used in the execution engine
368 # The current frame used to store local variables of the current method executed
369 fun frame
: FRAME do return frames
.first
371 # The stack of all frames. The first one is the current one.
372 var frames
= new List[FRAME]
374 # Return a stack trace. One line per function
375 fun stack_trace
: String
377 var b
= new FlatBuffer
378 b
.append
(",---- Stack trace -- - - -\n")
380 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
382 b
.append
("`------------------- - - -")
386 # The current node, used to print errors, debug and stack-traces
387 fun current_node
: nullable ANode
389 if frames
.is_empty
then return null
390 return frames
.first
.current_node
393 # The dynamic type of the current `self`
394 fun current_receiver_class
: MClassType
396 return frames
.first
.arguments
.first
.mtype
.as(MClassType)
399 # Initialize the environment for a call and return a new Frame
400 # *`node` The AST node
401 # *`mpropdef` The corresponding mpropdef
402 # *`args` Arguments of the call
403 fun new_frame
(node
: ANode, mpropdef
: MPropDef, args
: Array[Instance]): FRAME
405 return new InterpreterFrame(node
, mpropdef
, args
)
408 # Exit the program with a message
409 fun fatal
(message
: String)
411 var node
= current_node
415 node
.fatal
(self, message
)
420 # Debug on the current node
421 fun debug
(message
: String)
423 var node
= current_node
431 # Retrieve the value of the variable in the current frame
432 fun read_variable
(v
: Variable): Instance
434 var f
= frames
.first
.as(InterpreterFrame)
438 # Assign the value of the variable in the current frame
439 fun write_variable
(v
: Variable, value
: Instance)
441 var f
= frames
.first
.as(InterpreterFrame)
445 # Store known methods, used to trace methods as they are reached
446 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
448 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
449 # This method is used to manage varargs in signatures and returns the real array
450 # of instances to use in the call.
451 # Return `null` if one of the evaluation of the arguments return null.
452 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: Instance, args
: SequenceRead[AExpr]): nullable Array[Instance]
454 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
455 var res
= new Array[Instance]
458 if msignature
.arity
== 0 then return res
461 assert args
.length
== msignature
.arity
else debug
("Expected {msignature.arity} args, got {args.length}")
463 var e
= self.expr
(ne
)
464 if e
== null then return null
470 # Eval in order of arguments, not parameters
471 var exprs
= new Array[Instance].with_capacity
(args
.length
)
473 var e
= self.expr
(ne
)
474 if e
== null then return null
479 # Fill `res` with the result of the evaluation according to the mapping
480 for i
in [0..msignature
.arity
[ do
481 var param
= msignature
.mparameters
[i
]
482 var j
= map
.map
.get_or_null
(i
)
485 res
.add
(null_instance
)
488 if param
.is_vararg
and args
[i
].vararg_decl
> 0 then
489 var vararg
= exprs
.sub
(j
, args
[i
].vararg_decl
)
490 var elttype
= param
.mtype
.anchor_to
(self.mainmodule
, recv
.mtype
.as(MClassType))
491 var arg
= self.array_instance
(vararg
, elttype
)
500 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
501 # Return a value if `mpropdef` is a function, or null if it is a procedure.
502 # The call is direct/static. There is no message-sending/late-binding.
503 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
505 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
506 self.discover_call_trace
.add mpropdef
507 self.debug
("Discovered {mpropdef}")
509 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
511 # Look for the AST node that implements the property
512 var val
= mpropdef
.constant_value
514 var node
= modelbuilder
.mpropdef2node
(mpropdef
)
515 if mpropdef
.is_abstract
then
517 self.frames
.unshift new_frame
(node
, mpropdef
, args
)
519 fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
523 if node
isa APropdef then
524 self.parameter_check
(node
, mpropdef
, args
)
525 return node
.call
(self, mpropdef
, args
)
526 else if node
isa AClassdef then
527 self.parameter_check
(node
, mpropdef
, args
)
528 return node
.call
(self, mpropdef
, args
)
529 else if node
!= null then
530 fatal
("Fatal Error: method {mpropdef} associated to unexpected AST node {node.location}")
532 else if val
!= null then
533 return value_instance
(val
)
535 fatal
("Fatal Error: method {mpropdef} not found in the AST")
540 # Execute type checks of covariant parameters
541 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
543 var msignature
= mpropdef
.msignature
.as(not null)
544 for i
in [0..msignature
.arity
[ do
545 var mp
= msignature
.mparameters
[i
]
547 # skip test for vararg since the array is instantiated with the correct polymorphic type
548 if mp
.is_vararg
then continue
550 # skip if the cast is not required
551 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
552 if not origmtype
.need_anchor
then continue
554 #print "{mpropdef}: {mpropdef.mproperty.intro.msignature.mparameters[i]}"
556 # get the parameter type
558 var anchor
= args
.first
.mtype
.as(MClassType)
559 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
560 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
561 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
566 # Common code for runtime injected calls and normal calls
567 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
569 if mtype
isa MNullType then
570 if mproperty
.name
== "==" or mproperty
.name
== "is_same_instance" then
571 return self.bool_instance
(args
[0] == args
[1])
572 else if mproperty
.name
== "!=" then
573 return self.bool_instance
(args
[0] != args
[1])
575 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
576 fatal
("Receiver is null")
581 # Execute a full `callsite` for given `args`
582 # Use this method, instead of `send` to execute and control the additional behavior of the call-sites
583 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
585 if callsite
== null then return null
586 var initializers
= callsite
.mpropdef
.initializers
587 if not initializers
.is_empty
then
588 var recv
= arguments
.first
590 for p
in initializers
do
591 if p
isa MMethod then
593 for x
in p
.intro
.msignature
.mparameters
do
594 args
.add arguments
[i
]
598 else if p
isa MAttribute then
599 assert recv
isa MutableInstance
600 write_attribute
(p
, recv
, arguments
[i
])
604 assert i
== arguments
.length
606 return send
(callsite
.mproperty
, [recv
])
608 return send
(callsite
.mproperty
, arguments
)
611 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
612 # Return a value if `mproperty` is a function, or null if it is a procedure.
613 # The call is polymorphic. There is a message-sending/late-binding according to the receiver (args[0]).
614 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
616 var recv
= args
.first
617 var mtype
= recv
.mtype
618 var ret
= send_commons
(mproperty
, args
, mtype
)
619 if ret
!= null then return ret
620 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
621 return self.call
(propdef
, args
)
624 # Read the attribute `mproperty` of an instance `recv` and return its value.
625 # If the attribute in not yet initialized, then aborts with an error message.
626 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
628 assert recv
isa MutableInstance
629 if not recv
.attributes
.has_key
(mproperty
) then
630 fatal
("Uninitialized attribute {mproperty.name}")
633 return recv
.attributes
[mproperty
]
636 # Replace in `recv` the value of the attribute `mproperty` by `value`
637 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
639 assert recv
isa MutableInstance
640 recv
.attributes
[mproperty
] = value
643 # Is the attribute `mproperty` initialized the instance `recv`?
644 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
646 assert recv
isa MutableInstance
647 return recv
.attributes
.has_key
(mproperty
)
650 # Collect attributes of a type in the order of their init
651 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
653 var cache
= self.collect_attr_propdef_cache
654 if cache
.has_key
(mtype
) then return cache
[mtype
]
656 var res
= new Array[AAttrPropdef]
657 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
658 self.mainmodule
.linearize_mclassdefs
(cds
)
660 res
.add_all
(modelbuilder
.collect_attr_propdef
(cd
))
667 private var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
669 # Fill the initial values of the newly created instance `recv`.
670 # `recv.mtype` is used to know what must be filled.
671 fun init_instance
(recv
: Instance)
673 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
674 npropdef
.init_expr
(self, recv
)
678 # A hook to initialize a `PrimitiveInstance`
679 fun init_instance_primitive
(recv
: Instance) do end
681 # This function determines the correct type according to the receiver of the current propdef (self).
682 fun unanchor_type
(mtype
: MType): MType
684 return mtype
.anchor_to
(self.mainmodule
, current_receiver_class
)
687 # Placebo instance used to mark internal error result when `null` already have a meaning.
688 # TODO: replace with multiple return or something better
689 var error_instance
= new MutableInstance(modelbuilder
.model
.null_type
) is lazy
697 # The problematic node, if any
698 var node
: nullable ANode
701 # An instance represents a value of the executed program.
702 abstract class Instance
703 # The dynamic type of the instance
704 # ASSERT: not self.mtype.is_anchored
707 # Return `true` if the instance is the `true` value.
709 # Return `false` if the instance is the `false` value.
710 # Abort if the instance is not a boolean value.
711 fun is_true
: Bool do abort
713 # Return true if `self` IS `o` (using the Nit semantic of is)
714 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
716 # Human readable object identity "Type#number"
717 redef fun to_s
do return "{mtype}"
719 # Return the integer value if the instance is an integer.
721 fun to_i
: Int do abort
723 # Return the integer value if the instance is a float.
725 fun to_f
: Float do abort
727 # Return the integer value if the instance is a byte.
729 fun to_b
: Byte do abort
731 # Return the integer value if the instance is a int8.
733 fun to_i8
: Int8 do abort
735 # Return the integer value if the instance is a int16.
737 fun to_i16
: Int16 do abort
739 # Return the integer value if the instance is a uint16.
741 fun to_u16
: UInt16 do abort
743 # Return the integer value if the instance is a int32.
745 fun to_i32
: Int32 do abort
747 # Return the integer value if the instance is a uint32.
749 fun to_u32
: UInt32 do abort
751 # The real value encapsulated if the instance is primitive.
753 fun val
: nullable Object do abort
756 # A instance with attribute (standards objects)
757 class MutableInstance
760 # The values of the attributes
761 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
764 # Special instance to handle primitives values (int, bool, etc.)
765 # The trick is just to encapsulate the “real” value.
766 class PrimitiveInstance[E
]
769 # The real value encapsulated
774 if val
== true then return true
775 if val
== false then return false
781 if not o
isa PrimitiveInstance[nullable Object] then return false
782 return self.val
== o
.val
787 if not o
isa PrimitiveInstance[nullable Object] then return false
788 return self.val
.is_same_instance
(o
.val
)
791 redef fun to_s
do return "{mtype}#{val.object_id}({val or else "null"})"
793 redef fun to_i
do return val
.as(Int)
795 redef fun to_f
do return val
.as(Float)
797 redef fun to_b
do return val
.as(Byte)
799 redef fun to_i8
do return val
.as(Int8)
801 redef fun to_i16
do return val
.as(Int16)
803 redef fun to_u16
do return val
.as(UInt16)
805 redef fun to_i32
do return val
.as(Int32)
807 redef fun to_u32
do return val
.as(UInt32)
810 # Information about local variables in a running method
812 # The current visited node
813 # The node is stored by frame to keep a stack trace
814 var current_node
: ANode
815 # The executed property.
816 # A Method in case of a call, an attribute in case of a default initialization.
817 var mpropdef
: MPropDef
818 # Arguments of the method (the first is the receiver)
819 var arguments
: Array[Instance]
820 # Indicate if the expression has an array comprehension form
821 var comprehension
: nullable Array[Instance] = null
824 # Implementation of a Frame with a Hashmap to store local variables
825 class InterpreterFrame
828 # Mapping between a variable and the current value
829 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
833 # Aborts the program with a message
834 # `v` is used to know if a colored message is displayed or not
835 fun fatal
(v
: NaiveInterpreter, message
: String)
837 # Abort if there is a `catch` block
838 if v
.catch_count
> 0 then
839 v
.last_error
= new FatalError(message
, self)
843 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
then
844 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
846 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
847 sys
.stderr
.write
(v
.stack_trace
)
848 sys
.stderr
.write
("\n")
855 # Execute a `mpropdef` associated with the current node.
856 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
858 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
863 redef class AMethPropdef
866 redef fun call
(v
, mpropdef
, args
)
868 var f
= v
.new_frame
(self, mpropdef
, args
)
869 var res
= call_commons
(v
, mpropdef
, args
, f
)
871 if v
.is_escape
(self.return_mark
) then
878 # Execution of the body of the method
880 # It handle the common special cases: super, intern, extern
881 fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
885 for i
in [0..mpropdef
.msignature
.arity
[ do
886 var variable
= self.n_signature
.n_params
[i
].variable
887 assert variable
!= null
888 v
.write_variable
(variable
, arguments
[i
+1])
891 # Call the implicit super-init
892 var auto_super_inits
= self.auto_super_inits
893 if auto_super_inits
!= null then
894 var args
= [arguments
.first
]
895 for auto_super_init
in auto_super_inits
do
897 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
898 args
.add
(arguments
[i
])
900 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
901 v
.callsite
(auto_super_init
, args
)
904 if auto_super_call
then
905 # standard call-next-method
906 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
907 v
.call
(superpd
, arguments
)
911 if mpropdef
.is_intern
or mpropdef
.is_extern
then
912 var res
= intern_call
(v
, mpropdef
, arguments
)
913 if res
!= v
.error_instance
then return res
916 if mpropdef
.is_extern
then
917 var res
= call_extern
(v
, mpropdef
, arguments
, f
)
918 if res
!= v
.error_instance
then return res
921 if n_block
!= null then
926 # Fail if nothing succeed
927 if mpropdef
.is_intern
then
928 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
929 else if mpropdef
.is_extern
then
930 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
932 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
937 # Call this extern method
938 protected fun call_extern
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
940 return v
.error_instance
943 # Interprets a intern or a shortcut extern method.
944 # Returns the result for a function, `null` for a procedure, or `error_instance` if the method is unknown.
945 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
947 var pname
= mpropdef
.mproperty
.name
948 var cname
= mpropdef
.mclassdef
.mclass
.name
949 if pname
== "output" then
950 var recv
= args
.first
953 else if pname
== "object_id" then
954 var recv
= args
.first
955 if recv
isa PrimitiveInstance[Object] then
956 return v
.int_instance
(recv
.val
.object_id
)
958 return v
.int_instance
(recv
.object_id
)
960 else if pname
== "output_class_name" then
961 var recv
= args
.first
964 else if pname
== "native_class_name" then
965 var recv
= args
.first
966 var txt
= recv
.mtype
.to_s
967 return v
.c_string_instance
(txt
)
968 else if pname
== "==" then
969 # == is correctly redefined for instances
970 return v
.bool_instance
(args
[0] == args
[1])
971 else if pname
== "!=" then
972 return v
.bool_instance
(args
[0] != args
[1])
973 else if pname
== "is_same_type" then
974 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
975 else if pname
== "is_same_instance" then
976 return v
.bool_instance
(args
[0].eq_is
(args
[1]))
977 else if pname
== "class_inheritance_metamodel_json" then
978 return v
.c_string_instance
(v
.mainmodule
.flatten_mclass_hierarchy
.to_thin_json
)
979 else if pname
== "exit" then
982 else if pname
== "buffer_mode_full" then
983 return v
.int_instance
(sys
.buffer_mode_full
)
984 else if pname
== "buffer_mode_line" then
985 return v
.int_instance
(sys
.buffer_mode_line
)
986 else if pname
== "buffer_mode_none" then
987 return v
.int_instance
(sys
.buffer_mode_none
)
988 else if pname
== "sys" then
990 else if cname
== "Int" then
991 var recvval
= args
[0].to_i
992 if pname
== "unary -" then
993 return v
.int_instance
(-recvval
)
994 else if pname
== "unary +" then
996 else if pname
== "+" then
997 return v
.int_instance
(recvval
+ args
[1].to_i
)
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
== "%" then
1003 return v
.int_instance
(recvval
% args
[1].to_i
)
1004 else if pname
== "/" then
1005 return v
.int_instance
(recvval
/ args
[1].to_i
)
1006 else if pname
== "<" then
1007 return v
.bool_instance
(recvval
< args
[1].to_i
)
1008 else if pname
== ">" then
1009 return v
.bool_instance
(recvval
> args
[1].to_i
)
1010 else if pname
== "<=" then
1011 return v
.bool_instance
(recvval
<= args
[1].to_i
)
1012 else if pname
== ">=" then
1013 return v
.bool_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
== "to_f" then
1021 return v
.float_instance
(recvval
.to_f
)
1022 else if pname
== "to_b" then
1023 return v
.byte_instance
(recvval
.to_b
)
1024 else if pname
== "<<" then
1025 return v
.int_instance
(recvval
<< args
[1].to_i
)
1026 else if pname
== ">>" then
1027 return v
.int_instance
(recvval
>> args
[1].to_i
)
1028 else if pname
== "to_i8" then
1029 return v
.int8_instance
(recvval
.to_i8
)
1030 else if pname
== "to_i16" then
1031 return v
.int16_instance
(recvval
.to_i16
)
1032 else if pname
== "to_u16" then
1033 return v
.uint16_instance
(recvval
.to_u16
)
1034 else if pname
== "to_i32" then
1035 return v
.int32_instance
(recvval
.to_i32
)
1036 else if pname
== "to_u32" then
1037 return v
.uint32_instance
(recvval
.to_u32
)
1039 else if cname
== "Byte" then
1040 var recvval
= args
[0].to_b
1041 if pname
== "unary -" then
1042 return v
.byte_instance
(-recvval
)
1043 else if pname
== "unary +" then
1045 else if pname
== "+" then
1046 return v
.byte_instance
(recvval
+ args
[1].to_b
)
1047 else if pname
== "-" then
1048 return v
.byte_instance
(recvval
- args
[1].to_b
)
1049 else if pname
== "*" then
1050 return v
.byte_instance
(recvval
* args
[1].to_b
)
1051 else if pname
== "%" then
1052 return v
.byte_instance
(recvval
% args
[1].to_b
)
1053 else if pname
== "/" then
1054 return v
.byte_instance
(recvval
/ args
[1].to_b
)
1055 else if pname
== "<" then
1056 return v
.bool_instance
(recvval
< args
[1].to_b
)
1057 else if pname
== ">" then
1058 return v
.bool_instance
(recvval
> args
[1].to_b
)
1059 else if pname
== "<=" then
1060 return v
.bool_instance
(recvval
<= args
[1].to_b
)
1061 else if pname
== ">=" then
1062 return v
.bool_instance
(recvval
>= args
[1].to_b
)
1063 else if pname
== "<=>" then
1064 return v
.int_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
== "to_f" then
1070 return v
.float_instance
(recvval
.to_f
)
1071 else if pname
== "to_i" then
1072 return v
.int_instance
(recvval
.to_i
)
1073 else if pname
== "<<" then
1074 return v
.byte_instance
(recvval
<< args
[1].to_i
)
1075 else if pname
== ">>" then
1076 return v
.byte_instance
(recvval
>> args
[1].to_i
)
1077 else if pname
== "to_i8" then
1078 return v
.int8_instance
(recvval
.to_i8
)
1079 else if pname
== "to_i16" then
1080 return v
.int16_instance
(recvval
.to_i16
)
1081 else if pname
== "to_u16" then
1082 return v
.uint16_instance
(recvval
.to_u16
)
1083 else if pname
== "to_i32" then
1084 return v
.int32_instance
(recvval
.to_i32
)
1085 else if pname
== "to_u32" then
1086 return v
.uint32_instance
(recvval
.to_u32
)
1087 else if pname
== "byte_to_s_len" then
1088 return v
.int_instance
(recvval
.to_s
.length
)
1090 else if cname
== "Char" then
1091 var recv
= args
[0].val
.as(Char)
1092 if pname
== "successor" then
1093 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
1094 else if pname
== "predecessor" then
1095 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
1096 else if pname
== "<" then
1097 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
1098 else if pname
== ">" then
1099 return v
.bool_instance
(recv
> args
[1].val
.as(Char))
1100 else if pname
== "<=" then
1101 return v
.bool_instance
(recv
<= args
[1].val
.as(Char))
1102 else if pname
== ">=" then
1103 return v
.bool_instance
(recv
>= args
[1].val
.as(Char))
1104 else if pname
== "<=>" then
1105 return v
.int_instance
(recv
<=> args
[1].val
.as(Char))
1107 else if cname
== "Float" then
1108 var recv
= args
[0].to_f
1109 if pname
== "unary -" then
1110 return v
.float_instance
(-recv
)
1111 else if pname
== "unary +" then
1113 else if pname
== "+" then
1114 return v
.float_instance
(recv
+ args
[1].to_f
)
1115 else if pname
== "-" then
1116 return v
.float_instance
(recv
- args
[1].to_f
)
1117 else if pname
== "*" then
1118 return v
.float_instance
(recv
* args
[1].to_f
)
1119 else if pname
== "/" then
1120 return v
.float_instance
(recv
/ args
[1].to_f
)
1121 else if pname
== "<" then
1122 return v
.bool_instance
(recv
< args
[1].to_f
)
1123 else if pname
== ">" then
1124 return v
.bool_instance
(recv
> args
[1].to_f
)
1125 else if pname
== "<=" then
1126 return v
.bool_instance
(recv
<= args
[1].to_f
)
1127 else if pname
== ">=" then
1128 return v
.bool_instance
(recv
>= args
[1].to_f
)
1129 else if pname
== "to_i" then
1130 return v
.int_instance
(recv
.to_i
)
1131 else if pname
== "to_b" then
1132 return v
.byte_instance
(recv
.to_b
)
1133 else if pname
== "to_i8" then
1134 return v
.int8_instance
(recv
.to_i8
)
1135 else if pname
== "to_i16" then
1136 return v
.int16_instance
(recv
.to_i16
)
1137 else if pname
== "to_u16" then
1138 return v
.uint16_instance
(recv
.to_u16
)
1139 else if pname
== "to_i32" then
1140 return v
.int32_instance
(recv
.to_i32
)
1141 else if pname
== "to_u32" then
1142 return v
.uint32_instance
(recv
.to_u32
)
1143 else if pname
== "cos" then
1144 return v
.float_instance
(args
[0].to_f
.cos
)
1145 else if pname
== "sin" then
1146 return v
.float_instance
(args
[0].to_f
.sin
)
1147 else if pname
== "tan" then
1148 return v
.float_instance
(args
[0].to_f
.tan
)
1149 else if pname
== "acos" then
1150 return v
.float_instance
(args
[0].to_f
.acos
)
1151 else if pname
== "asin" then
1152 return v
.float_instance
(args
[0].to_f
.asin
)
1153 else if pname
== "atan" then
1154 return v
.float_instance
(args
[0].to_f
.atan
)
1155 else if pname
== "sqrt" then
1156 return v
.float_instance
(args
[0].to_f
.sqrt
)
1157 else if pname
== "exp" then
1158 return v
.float_instance
(args
[0].to_f
.exp
)
1159 else if pname
== "log" then
1160 return v
.float_instance
(args
[0].to_f
.log
)
1161 else if pname
== "pow" then
1162 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
1163 else if pname
== "abs" then
1164 return v
.float_instance
(args
[0].to_f
.abs
)
1165 else if pname
== "hypot_with" then
1166 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
1167 else if pname
== "is_nan" then
1168 return v
.bool_instance
(args
[0].to_f
.is_nan
)
1169 else if pname
== "is_inf_extern" then
1170 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
1171 else if pname
== "round" then
1172 return v
.float_instance
(args
[0].to_f
.round
)
1174 else if cname
== "CString" then
1175 if pname
== "new" then
1176 return v
.c_string_instance_len
(args
[1].to_i
)
1178 var recvval
= args
.first
.val
.as(CString)
1179 if pname
== "[]" then
1180 var arg1
= args
[1].to_i
1181 return v
.byte_instance
(recvval
[arg1
])
1182 else if pname
== "[]=" then
1183 var arg1
= args
[1].to_i
1184 recvval
[arg1
] = args
[2].val
.as(Byte)
1186 else if pname
== "copy_to" then
1187 # sig= copy_to(dest: CString, length: Int, from: Int, to: Int)
1188 var destval
= args
[1].val
.as(CString)
1189 var lenval
= args
[2].to_i
1190 var fromval
= args
[3].to_i
1191 var toval
= args
[4].to_i
1192 recvval
.copy_to
(destval
, lenval
, fromval
, toval
)
1194 else if pname
== "atoi" then
1195 return v
.int_instance
(recvval
.atoi
)
1196 else if pname
== "fast_cstring" then
1197 var ns
= recvval
.fast_cstring
(args
[1].to_i
)
1198 return v
.c_string_instance
(ns
.to_s
)
1199 else if pname
== "fetch_4_chars" then
1200 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_chars
(args
[1].to_i
))
1201 else if pname
== "fetch_4_hchars" then
1202 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_hchars
(args
[1].to_i
))
1203 else if pname
== "utf8_length" then
1204 return v
.int_instance
(args
[0].val
.as(CString).utf8_length
(args
[1].to_i
, args
[2].to_i
))
1206 else if cname
== "NativeArray" then
1207 if pname
== "new" then
1208 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
1209 var instance
= new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
1210 v
.init_instance_primitive
(instance
)
1213 var recvval
= args
.first
.val
.as(Array[Instance])
1214 if pname
== "[]" then
1215 return recvval
[args
[1].to_i
]
1216 else if pname
== "[]=" then
1217 recvval
[args
[1].to_i
] = args
[2]
1219 else if pname
== "length" then
1220 return v
.int_instance
(recvval
.length
)
1221 else if pname
== "copy_to" then
1222 recvval
.copy_to
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
1225 else if cname
== "Int8" then
1226 var recvval
= args
[0].to_i8
1227 if pname
== "unary -" then
1228 return v
.int8_instance
(-recvval
)
1229 else if pname
== "unary +" then
1231 else if pname
== "+" then
1232 return v
.int8_instance
(recvval
+ args
[1].to_i8
)
1233 else if pname
== "-" then
1234 return v
.int8_instance
(recvval
- args
[1].to_i8
)
1235 else if pname
== "*" then
1236 return v
.int8_instance
(recvval
* args
[1].to_i8
)
1237 else if pname
== "%" then
1238 return v
.int8_instance
(recvval
% args
[1].to_i8
)
1239 else if pname
== "/" then
1240 return v
.int8_instance
(recvval
/ args
[1].to_i8
)
1241 else if pname
== "<" then
1242 return v
.bool_instance
(recvval
< args
[1].to_i8
)
1243 else if pname
== ">" then
1244 return v
.bool_instance
(recvval
> args
[1].to_i8
)
1245 else if pname
== "<=" then
1246 return v
.bool_instance
(recvval
<= args
[1].to_i8
)
1247 else if pname
== ">=" then
1248 return v
.bool_instance
(recvval
>= args
[1].to_i8
)
1249 else if pname
== "<=>" then
1250 return v
.int_instance
(recvval
<=> args
[1].to_i8
)
1251 else if pname
== "to_f" then
1252 return v
.float_instance
(recvval
.to_f
)
1253 else if pname
== "to_i" then
1254 return v
.int_instance
(recvval
.to_i
)
1255 else if pname
== "to_b" then
1256 return v
.byte_instance
(recvval
.to_b
)
1257 else if pname
== "to_i16" then
1258 return v
.int16_instance
(recvval
.to_i16
)
1259 else if pname
== "to_u16" then
1260 return v
.uint16_instance
(recvval
.to_u16
)
1261 else if pname
== "to_i32" then
1262 return v
.int32_instance
(recvval
.to_i32
)
1263 else if pname
== "to_u32" then
1264 return v
.uint32_instance
(recvval
.to_u32
)
1265 else if pname
== "<<" then
1266 return v
.int8_instance
(recvval
<< (args
[1].to_i
))
1267 else if pname
== ">>" then
1268 return v
.int8_instance
(recvval
>> (args
[1].to_i
))
1269 else if pname
== "&" then
1270 return v
.int8_instance
(recvval
& args
[1].to_i8
)
1271 else if pname
== "|" then
1272 return v
.int8_instance
(recvval
| args
[1].to_i8
)
1273 else if pname
== "^" then
1274 return v
.int8_instance
(recvval ^ args
[1].to_i8
)
1275 else if pname
== "unary ~" then
1276 return v
.int8_instance
(~recvval
)
1278 else if cname
== "Int16" then
1279 var recvval
= args
[0].to_i16
1280 if pname
== "unary -" then
1281 return v
.int16_instance
(-recvval
)
1282 else if pname
== "unary +" then
1284 else if pname
== "+" then
1285 return v
.int16_instance
(recvval
+ args
[1].to_i16
)
1286 else if pname
== "-" then
1287 return v
.int16_instance
(recvval
- args
[1].to_i16
)
1288 else if pname
== "*" then
1289 return v
.int16_instance
(recvval
* args
[1].to_i16
)
1290 else if pname
== "%" then
1291 return v
.int16_instance
(recvval
% args
[1].to_i16
)
1292 else if pname
== "/" then
1293 return v
.int16_instance
(recvval
/ args
[1].to_i16
)
1294 else if pname
== "<" then
1295 return v
.bool_instance
(recvval
< args
[1].to_i16
)
1296 else if pname
== ">" then
1297 return v
.bool_instance
(recvval
> args
[1].to_i16
)
1298 else if pname
== "<=" then
1299 return v
.bool_instance
(recvval
<= args
[1].to_i16
)
1300 else if pname
== ">=" then
1301 return v
.bool_instance
(recvval
>= args
[1].to_i16
)
1302 else if pname
== "<=>" then
1303 return v
.int_instance
(recvval
<=> args
[1].to_i16
)
1304 else if pname
== "to_f" then
1305 return v
.float_instance
(recvval
.to_f
)
1306 else if pname
== "to_i" then
1307 return v
.int_instance
(recvval
.to_i
)
1308 else if pname
== "to_b" then
1309 return v
.byte_instance
(recvval
.to_b
)
1310 else if pname
== "to_i8" then
1311 return v
.int8_instance
(recvval
.to_i8
)
1312 else if pname
== "to_u16" then
1313 return v
.uint16_instance
(recvval
.to_u16
)
1314 else if pname
== "to_i32" then
1315 return v
.int32_instance
(recvval
.to_i32
)
1316 else if pname
== "to_u32" then
1317 return v
.uint32_instance
(recvval
.to_u32
)
1318 else if pname
== "<<" then
1319 return v
.int16_instance
(recvval
<< (args
[1].to_i
))
1320 else if pname
== ">>" then
1321 return v
.int16_instance
(recvval
>> (args
[1].to_i
))
1322 else if pname
== "&" then
1323 return v
.int16_instance
(recvval
& args
[1].to_i16
)
1324 else if pname
== "|" then
1325 return v
.int16_instance
(recvval
| args
[1].to_i16
)
1326 else if pname
== "^" then
1327 return v
.int16_instance
(recvval ^ args
[1].to_i16
)
1328 else if pname
== "unary ~" then
1329 return v
.int16_instance
(~recvval
)
1331 else if cname
== "UInt16" then
1332 var recvval
= args
[0].to_u16
1333 if pname
== "unary -" then
1334 return v
.uint16_instance
(-recvval
)
1335 else if pname
== "unary +" then
1337 else if pname
== "+" then
1338 return v
.uint16_instance
(recvval
+ args
[1].to_u16
)
1339 else if pname
== "-" then
1340 return v
.uint16_instance
(recvval
- args
[1].to_u16
)
1341 else if pname
== "*" then
1342 return v
.uint16_instance
(recvval
* args
[1].to_u16
)
1343 else if pname
== "%" then
1344 return v
.uint16_instance
(recvval
% args
[1].to_u16
)
1345 else if pname
== "/" then
1346 return v
.uint16_instance
(recvval
/ args
[1].to_u16
)
1347 else if pname
== "<" then
1348 return v
.bool_instance
(recvval
< args
[1].to_u16
)
1349 else if pname
== ">" then
1350 return v
.bool_instance
(recvval
> args
[1].to_u16
)
1351 else if pname
== "<=" then
1352 return v
.bool_instance
(recvval
<= args
[1].to_u16
)
1353 else if pname
== ">=" then
1354 return v
.bool_instance
(recvval
>= args
[1].to_u16
)
1355 else if pname
== "<=>" then
1356 return v
.int_instance
(recvval
<=> args
[1].to_u16
)
1357 else if pname
== "to_f" then
1358 return v
.float_instance
(recvval
.to_f
)
1359 else if pname
== "to_i" then
1360 return v
.int_instance
(recvval
.to_i
)
1361 else if pname
== "to_b" then
1362 return v
.byte_instance
(recvval
.to_b
)
1363 else if pname
== "to_i8" then
1364 return v
.int8_instance
(recvval
.to_i8
)
1365 else if pname
== "to_i16" then
1366 return v
.int16_instance
(recvval
.to_i16
)
1367 else if pname
== "to_i32" then
1368 return v
.int32_instance
(recvval
.to_i32
)
1369 else if pname
== "to_u32" then
1370 return v
.uint32_instance
(recvval
.to_u32
)
1371 else if pname
== "<<" then
1372 return v
.uint16_instance
(recvval
<< (args
[1].to_i
))
1373 else if pname
== ">>" then
1374 return v
.uint16_instance
(recvval
>> (args
[1].to_i
))
1375 else if pname
== "&" then
1376 return v
.uint16_instance
(recvval
& args
[1].to_u16
)
1377 else if pname
== "|" then
1378 return v
.uint16_instance
(recvval
| args
[1].to_u16
)
1379 else if pname
== "^" then
1380 return v
.uint16_instance
(recvval ^ args
[1].to_u16
)
1381 else if pname
== "unary ~" then
1382 return v
.uint16_instance
(~recvval
)
1384 else if cname
== "Int32" then
1385 var recvval
= args
[0].to_i32
1386 if pname
== "unary -" then
1387 return v
.int32_instance
(-recvval
)
1388 else if pname
== "unary +" then
1390 else if pname
== "+" then
1391 return v
.int32_instance
(recvval
+ args
[1].to_i32
)
1392 else if pname
== "-" then
1393 return v
.int32_instance
(recvval
- args
[1].to_i32
)
1394 else if pname
== "*" then
1395 return v
.int32_instance
(recvval
* args
[1].to_i32
)
1396 else if pname
== "%" then
1397 return v
.int32_instance
(recvval
% args
[1].to_i32
)
1398 else if pname
== "/" then
1399 return v
.int32_instance
(recvval
/ args
[1].to_i32
)
1400 else if pname
== "<" then
1401 return v
.bool_instance
(recvval
< args
[1].to_i32
)
1402 else if pname
== ">" then
1403 return v
.bool_instance
(recvval
> args
[1].to_i32
)
1404 else if pname
== "<=" then
1405 return v
.bool_instance
(recvval
<= args
[1].to_i32
)
1406 else if pname
== ">=" then
1407 return v
.bool_instance
(recvval
>= args
[1].to_i32
)
1408 else if pname
== "<=>" then
1409 return v
.int_instance
(recvval
<=> args
[1].to_i32
)
1410 else if pname
== "to_f" then
1411 return v
.float_instance
(recvval
.to_f
)
1412 else if pname
== "to_i" then
1413 return v
.int_instance
(recvval
.to_i
)
1414 else if pname
== "to_b" then
1415 return v
.byte_instance
(recvval
.to_b
)
1416 else if pname
== "to_i8" then
1417 return v
.int8_instance
(recvval
.to_i8
)
1418 else if pname
== "to_i16" then
1419 return v
.int16_instance
(recvval
.to_i16
)
1420 else if pname
== "to_u16" then
1421 return v
.uint16_instance
(recvval
.to_u16
)
1422 else if pname
== "to_u32" then
1423 return v
.uint32_instance
(recvval
.to_u32
)
1424 else if pname
== "<<" then
1425 return v
.int32_instance
(recvval
<< (args
[1].to_i
))
1426 else if pname
== ">>" then
1427 return v
.int32_instance
(recvval
>> (args
[1].to_i
))
1428 else if pname
== "&" then
1429 return v
.int32_instance
(recvval
& args
[1].to_i32
)
1430 else if pname
== "|" then
1431 return v
.int32_instance
(recvval
| args
[1].to_i32
)
1432 else if pname
== "^" then
1433 return v
.int32_instance
(recvval ^ args
[1].to_i32
)
1434 else if pname
== "unary ~" then
1435 return v
.int32_instance
(~recvval
)
1437 else if cname
== "UInt32" then
1438 var recvval
= args
[0].to_u32
1439 if pname
== "unary -" then
1440 return v
.uint32_instance
(-recvval
)
1441 else if pname
== "unary +" then
1443 else if pname
== "+" then
1444 return v
.uint32_instance
(recvval
+ args
[1].to_u32
)
1445 else if pname
== "-" then
1446 return v
.uint32_instance
(recvval
- args
[1].to_u32
)
1447 else if pname
== "*" then
1448 return v
.uint32_instance
(recvval
* args
[1].to_u32
)
1449 else if pname
== "%" then
1450 return v
.uint32_instance
(recvval
% args
[1].to_u32
)
1451 else if pname
== "/" then
1452 return v
.uint32_instance
(recvval
/ args
[1].to_u32
)
1453 else if pname
== "<" then
1454 return v
.bool_instance
(recvval
< args
[1].to_u32
)
1455 else if pname
== ">" then
1456 return v
.bool_instance
(recvval
> args
[1].to_u32
)
1457 else if pname
== "<=" then
1458 return v
.bool_instance
(recvval
<= args
[1].to_u32
)
1459 else if pname
== ">=" then
1460 return v
.bool_instance
(recvval
>= args
[1].to_u32
)
1461 else if pname
== "<=>" then
1462 return v
.int_instance
(recvval
<=> args
[1].to_u32
)
1463 else if pname
== "to_f" then
1464 return v
.float_instance
(recvval
.to_f
)
1465 else if pname
== "to_i" then
1466 return v
.int_instance
(recvval
.to_i
)
1467 else if pname
== "to_b" then
1468 return v
.byte_instance
(recvval
.to_b
)
1469 else if pname
== "to_i8" then
1470 return v
.int8_instance
(recvval
.to_i8
)
1471 else if pname
== "to_i16" then
1472 return v
.int16_instance
(recvval
.to_i16
)
1473 else if pname
== "to_u16" then
1474 return v
.uint16_instance
(recvval
.to_u16
)
1475 else if pname
== "to_i32" then
1476 return v
.int32_instance
(recvval
.to_i32
)
1477 else if pname
== "<<" then
1478 return v
.uint32_instance
(recvval
<< (args
[1].to_i
))
1479 else if pname
== ">>" then
1480 return v
.uint32_instance
(recvval
>> (args
[1].to_i
))
1481 else if pname
== "&" then
1482 return v
.uint32_instance
(recvval
& args
[1].to_u32
)
1483 else if pname
== "|" then
1484 return v
.uint32_instance
(recvval
| args
[1].to_u32
)
1485 else if pname
== "^" then
1486 return v
.uint32_instance
(recvval ^ args
[1].to_u32
)
1487 else if pname
== "unary ~" then
1488 return v
.uint32_instance
(~recvval
)
1490 else if pname
== "native_argc" then
1491 return v
.int_instance
(v
.arguments
.length
)
1492 else if pname
== "native_argv" then
1493 var txt
= v
.arguments
[args
[1].to_i
]
1494 return v
.c_string_instance
(txt
)
1495 else if pname
== "lexer_goto" then
1496 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
1497 else if pname
== "lexer_accept" then
1498 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
1499 else if pname
== "parser_goto" then
1500 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
1501 else if pname
== "parser_action" then
1502 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
1504 return v
.error_instance
1508 redef class AAttrPropdef
1509 redef fun call
(v
, mpropdef
, args
)
1511 var recv
= args
.first
1512 assert recv
isa MutableInstance
1513 var attr
= self.mpropdef
.mproperty
1514 if mpropdef
== mreadpropdef
then
1515 assert args
.length
== 1
1516 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
1517 var f
= v
.new_frame
(self, mpropdef
, args
)
1518 return evaluate_expr
(v
, recv
, f
)
1519 else if mpropdef
== mwritepropdef
then
1520 assert args
.length
== 2
1522 if is_optional
and arg
.mtype
isa MNullType then
1523 var f
= v
.new_frame
(self, mpropdef
, args
)
1524 arg
= evaluate_expr
(v
, recv
, f
)
1526 v
.write_attribute
(attr
, recv
, arg
)
1533 # Evaluate and set the default value of the attribute in `recv`
1534 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1536 if is_lazy
or is_optional
then return
1538 var f
= v
.new_frame
(self, mreadpropdef
.as(not null), [recv
])
1539 evaluate_expr
(v
, recv
, f
)
1542 var mpropdef
= self.mpropdef
1543 if mpropdef
== null then return
1544 var mtype
= self.mtype
.as(not null)
1545 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1546 if mtype
isa MNullableType then
1547 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1551 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance, f
: Frame): Instance
1553 assert recv
isa MutableInstance
1558 var nexpr
= self.n_expr
1559 var nblock
= self.n_block
1560 if nexpr
!= null then
1562 else if nblock
!= null then
1564 assert v
.escapemark
== return_mark
1573 assert not v
.is_escaping
1574 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1579 redef class AClassdef
1580 # Execute an implicit `mpropdef` associated with the current node.
1581 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance]): nullable Instance
1583 if mpropdef
.mproperty
.is_root_init
then
1584 assert arguments
.length
== 1
1585 if not mpropdef
.is_intro
then
1586 # standard call-next-method
1587 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
1588 v
.call
(superpd
, arguments
)
1598 # Evaluate the node as a possible expression.
1599 # Return a possible value
1600 # NOTE: Do not call this method directly, but use `v.expr`
1601 # This method is here to be implemented by subclasses.
1602 protected fun expr
(v
: NaiveInterpreter): nullable Instance
1604 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1608 # Evaluate the node as a statement.
1609 # NOTE: Do not call this method directly, but use `v.stmt`
1610 # This method is here to be implemented by subclasses (no need to return something).
1611 protected fun stmt
(v
: NaiveInterpreter)
1618 redef class ABlockExpr
1621 var last
= self.n_expr
.last
1622 for e
in self.n_expr
do
1623 if e
== last
then break
1625 if v
.is_escaping
then return null
1632 for e
in self.n_expr
do
1634 if v
.is_escaping
then return
1639 redef class AVardeclExpr
1642 var ne
= self.n_expr
1645 if i
== null then return null
1646 v
.write_variable
(self.variable
.as(not null), i
)
1653 redef class AVarExpr
1656 return v
.read_variable
(self.variable
.as(not null))
1660 redef class AVarAssignExpr
1663 var i
= v
.expr
(self.n_value
)
1664 if i
== null then return null
1665 v
.write_variable
(self.variable
.as(not null), i
)
1670 redef class AVarReassignExpr
1673 var variable
= self.variable
.as(not null)
1674 var vari
= v
.read_variable
(variable
)
1675 var value
= v
.expr
(self.n_value
)
1676 if value
== null then return
1677 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1679 v
.write_variable
(variable
, res
)
1683 redef class ASelfExpr
1686 return v
.frame
.arguments
.first
1690 redef class AImplicitSelfExpr
1693 if not is_sys
then return super
1698 redef class AEscapeExpr
1701 var ne
= self.n_expr
1704 if i
== null then return
1707 v
.escapevalue
= null
1709 v
.escapemark
= self.escapemark
1713 redef class AAbortExpr
1724 var cond
= v
.expr
(self.n_expr
)
1725 if cond
== null then return null
1726 if cond
.is_true
then
1727 return v
.expr
(self.n_then
.as(not null))
1729 return v
.expr
(self.n_else
.as(not null))
1735 var cond
= v
.expr
(self.n_expr
)
1736 if cond
== null then return
1737 if cond
.is_true
then
1745 redef class AIfexprExpr
1748 var cond
= v
.expr
(self.n_expr
)
1749 if cond
== null then return null
1750 if cond
.is_true
then
1751 return v
.expr
(self.n_then
)
1753 return v
.expr
(self.n_else
)
1761 # If this bloc has a catch, handle it with a do ... catch ... end
1762 if self.n_catch
!= null then
1766 v
.stmt
(self.n_block
)
1767 v
.is_escape
(self.break_mark
) # Clear the break (if any)
1770 # Restore the current frame if needed
1771 while v
.frame
!= frame
do v
.frames
.shift
1773 v
.stmt
(self.n_catch
)
1776 v
.stmt
(self.n_block
)
1777 v
.is_escape
(self.break_mark
)
1782 redef class AWhileExpr
1786 var cond
= v
.expr
(self.n_expr
)
1787 if cond
== null then return
1788 if not cond
.is_true
then return
1789 v
.stmt
(self.n_block
)
1790 if v
.is_escape
(self.break_mark
) then return
1791 v
.is_escape
(self.continue_mark
) # Clear the break
1792 if v
.is_escaping
then return
1797 redef class ALoopExpr
1801 v
.stmt
(self.n_block
)
1802 if v
.is_escape
(self.break_mark
) then return
1803 v
.is_escape
(self.continue_mark
) # Clear the break
1804 if v
.is_escaping
then return
1809 redef class AForExpr
1812 var iters
= new Array[Instance]
1814 for g
in n_groups
do
1815 var col
= v
.expr
(g
.n_expr
)
1816 if col
== null then return
1817 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1819 var iter
= v
.callsite
(g
.method_iterator
, [col
]).as(not null)
1824 for g
in n_groups
, iter
in iters
do
1825 var isok
= v
.callsite
(g
.method_is_ok
, [iter
]).as(not null)
1826 if not isok
.is_true
then break label
1827 if g
.variables
.length
== 1 then
1828 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1829 #self.debug("item {item}")
1830 v
.write_variable
(g
.variables
.first
, item
)
1831 else if g
.variables
.length
== 2 then
1832 var key
= v
.callsite
(g
.method_key
, [iter
]).as(not null)
1833 v
.write_variable
(g
.variables
[0], key
)
1834 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1835 v
.write_variable
(g
.variables
[1], item
)
1840 v
.stmt
(self.n_block
)
1841 if v
.is_escape
(self.break_mark
) then break
1842 v
.is_escape
(self.continue_mark
) # Clear the break
1843 if v
.is_escaping
then break
1844 for g
in n_groups
, iter
in iters
do
1845 v
.callsite
(g
.method_next
, [iter
])
1848 for g
in n_groups
, iter
in iters
do
1849 var method_finish
= g
.method_finish
1850 if method_finish
!= null then
1851 v
.callsite
(method_finish
, [iter
])
1857 redef class AWithExpr
1860 var expr
= v
.expr
(self.n_expr
)
1861 if expr
== null then return
1863 v
.callsite
(method_start
, [expr
])
1864 v
.stmt
(self.n_block
)
1865 v
.is_escape
(self.break_mark
) # Clear the break
1867 # Execute the finally without an escape
1868 var old_mark
= v
.escapemark
1870 v
.callsite
(method_finish
, [expr
])
1871 # Restore the escape unless another escape was provided
1872 if v
.escapemark
== null then v
.escapemark
= old_mark
1876 redef class AAssertExpr
1879 var cond
= v
.expr
(self.n_expr
)
1880 if cond
== null then return
1881 if not cond
.is_true
then
1883 if v
.is_escaping
then return
1885 # Explain assert if it fails
1886 var explain_assert_str
= explain_assert_str
1887 if explain_assert_str
!= null then
1888 var i
= v
.expr
(explain_assert_str
)
1889 if i
isa MutableInstance then
1890 var res
= v
.send
(v
.force_get_primitive_method
("to_cstring", i
.mtype
), [i
])
1894 print_error
"Runtime assert: {val.to_s}"
1902 fatal
(v
, "Assert '{nid.text}' failed")
1904 fatal
(v
, "Assert failed")
1914 var cond
= v
.expr
(self.n_expr
)
1915 if cond
== null then return null
1916 if cond
.is_true
then return cond
1917 return v
.expr
(self.n_expr2
)
1921 redef class AImpliesExpr
1924 var cond
= v
.expr
(self.n_expr
)
1925 if cond
== null then return null
1926 if not cond
.is_true
then return v
.true_instance
1927 return v
.expr
(self.n_expr2
)
1931 redef class AAndExpr
1934 var cond
= v
.expr
(self.n_expr
)
1935 if cond
== null then return null
1936 if not cond
.is_true
then return cond
1937 return v
.expr
(self.n_expr2
)
1941 redef class ANotExpr
1944 var cond
= v
.expr
(self.n_expr
)
1945 if cond
== null then return null
1946 return v
.bool_instance
(not cond
.is_true
)
1950 redef class AOrElseExpr
1953 var i
= v
.expr
(self.n_expr
)
1954 if i
== null then return null
1955 if i
!= v
.null_instance
then return i
1956 return v
.expr
(self.n_expr2
)
1960 redef class AIntegerExpr
1963 if value
isa Int then return v
.int_instance
(value
.as(Int))
1964 if value
isa Byte then return v
.byte_instance
(value
.as(Byte))
1965 if value
isa Int8 then return v
.int8_instance
(value
.as(Int8))
1966 if value
isa Int16 then return v
.int16_instance
(value
.as(Int16))
1967 if value
isa UInt16 then return v
.uint16_instance
(value
.as(UInt16))
1968 if value
isa Int32 then return v
.int32_instance
(value
.as(Int32))
1969 if value
isa UInt32 then return v
.uint32_instance
(value
.as(UInt32))
1974 redef class AFloatExpr
1977 return v
.float_instance
(self.value
.as(not null))
1981 redef class ACharExpr
1984 if is_ascii
then return v
.byte_instance
(self.value
.as(not null).ascii
)
1985 if is_code_point
then return v
.int_instance
(self.value
.as(not null).code_point
)
1986 return v
.char_instance
(self.value
.as(not null))
1990 redef class AArrayExpr
1993 var val
= new Array[Instance]
1994 var old_comprehension
= v
.frame
.comprehension
1995 v
.frame
.comprehension
= val
1996 for nexpr
in self.n_exprs
do
1997 if nexpr
isa AForExpr then
2000 var i
= v
.expr
(nexpr
)
2001 if i
== null then return null
2005 v
.frame
.comprehension
= old_comprehension
2006 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
2007 var elttype
= mtype
.arguments
.first
2008 return v
.array_instance
(val
, elttype
)
2012 redef class AugmentedStringFormExpr
2013 # Factorize the making of a `Regex` object from a literal prefixed string
2014 fun make_re
(v
: NaiveInterpreter, rs
: Instance): nullable Instance do
2017 var res
= v
.callsite
(tore
, [rs
])
2019 print
"Cannot call property `to_re` on {self}"
2022 for j
in suffix
.chars
do
2024 var prop
= ignore_case
2026 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2032 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2038 v
.callsite
(prop
, [res
, v
.bool_instance
(false)])
2041 # Should not happen, this needs to be updated
2042 # along with the addition of new suffixes
2049 redef class AStringFormExpr
2050 redef fun expr
(v
) do return v
.string_instance
(value
)
2053 redef class AStringExpr
2054 redef fun expr
(v
) do
2055 var s
= v
.string_instance
(value
)
2056 if is_string
then return s
2057 if is_bytestring
then
2058 var ns
= v
.c_string_instance_from_ns
(bytes
.items
, bytes
.length
)
2059 var ln
= v
.int_instance
(bytes
.length
)
2060 var prop
= to_bytes_with_copy
2062 var res
= v
.callsite
(prop
, [ns
, ln
])
2064 print
"Cannot call property `to_bytes` on {self}"
2069 var res
= make_re
(v
, s
)
2073 print
"Unimplemented prefix or suffix for {self}"
2080 redef class ASuperstringExpr
2083 var array
= new Array[Instance]
2084 for nexpr
in n_exprs
do
2085 var i
= v
.expr
(nexpr
)
2086 if i
== null then return null
2089 var i
= v
.array_instance
(array
, v
.mainmodule
.object_type
)
2090 var res
= v
.send
(v
.force_get_primitive_method
("plain_to_s", i
.mtype
), [i
])
2092 if is_re
then res
= make_re
(v
, res
)
2097 redef class ACrangeExpr
2100 var e1
= v
.expr
(self.n_expr
)
2101 if e1
== null then return null
2102 var e2
= v
.expr
(self.n_expr2
)
2103 if e2
== null then return null
2104 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2105 var res
= new MutableInstance(mtype
)
2106 v
.init_instance
(res
)
2107 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2112 redef class AOrangeExpr
2115 var e1
= v
.expr
(self.n_expr
)
2116 if e1
== null then return null
2117 var e2
= v
.expr
(self.n_expr2
)
2118 if e2
== null then return null
2119 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2120 var res
= new MutableInstance(mtype
)
2121 v
.init_instance
(res
)
2122 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2127 redef class ATrueExpr
2130 return v
.bool_instance
(true)
2134 redef class AFalseExpr
2137 return v
.bool_instance
(false)
2141 redef class ANullExpr
2144 return v
.null_instance
2148 redef class AIsaExpr
2151 var i
= v
.expr
(self.n_expr
)
2152 if i
== null then return null
2153 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
2154 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
2158 redef class AAsCastExpr
2161 var i
= v
.expr
(self.n_expr
)
2162 if i
== null then return null
2163 var mtype
= self.mtype
.as(not null)
2164 var amtype
= v
.unanchor_type
(mtype
)
2165 if not v
.is_subtype
(i
.mtype
, amtype
) then
2166 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
2172 redef class AAsNotnullExpr
2175 var i
= v
.expr
(self.n_expr
)
2176 if i
== null then return null
2177 if i
.mtype
isa MNullType then
2178 fatal
(v
, "Cast failed")
2184 redef class AParExpr
2187 return v
.expr
(self.n_expr
)
2191 redef class AOnceExpr
2194 if v
.onces
.has_key
(self) then
2195 return v
.onces
[self]
2197 var res
= v
.expr
(self.n_expr
)
2198 if res
== null then return null
2205 redef class ASendExpr
2208 var recv
= v
.expr
(self.n_expr
)
2209 if recv
== null then return null
2210 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2211 if args
== null then return null
2213 var res
= v
.callsite
(callsite
, args
)
2218 redef class ASendReassignFormExpr
2221 var recv
= v
.expr
(self.n_expr
)
2222 if recv
== null then return
2223 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2224 if args
== null then return
2225 var value
= v
.expr
(self.n_value
)
2226 if value
== null then return
2228 var read
= v
.callsite
(callsite
, args
)
2231 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
2232 assert write
!= null
2236 v
.callsite
(write_callsite
, args
)
2240 redef class ASuperExpr
2243 var recv
= v
.frame
.arguments
.first
2245 var callsite
= self.callsite
2246 if callsite
!= null then
2248 if self.n_args
.n_exprs
.is_empty
then
2249 # Add automatic arguments for the super init call
2251 for i
in [0..callsite
.msignature
.arity
[ do
2252 args
.add
(v
.frame
.arguments
[i
+1])
2255 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2256 if args
== null then return null
2260 var res
= v
.callsite
(callsite
, args
)
2264 # Standard call-next-method
2265 var mpropdef
= self.mpropdef
2266 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
2269 if self.n_args
.n_exprs
.is_empty
then
2270 args
= v
.frame
.arguments
2272 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
2273 if args
== null then return null
2276 var res
= v
.call
(mpropdef
, args
)
2281 redef class ANewExpr
2284 var mtype
= v
.unanchor_type
(self.recvtype
.as(not null))
2285 var recv
: Instance = new MutableInstance(mtype
)
2286 v
.init_instance
(recv
)
2287 var callsite
= self.callsite
2288 if callsite
== null then return recv
2290 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2291 if args
== null then return null
2292 var res2
= v
.callsite
(callsite
, args
)
2293 if res2
!= null then
2294 #self.debug("got {res2} from {mproperty}. drop {recv}")
2301 redef class AAttrExpr
2304 var recv
= v
.expr
(self.n_expr
)
2305 if recv
== null then return null
2306 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2307 var mproperty
= self.mproperty
.as(not null)
2308 return v
.read_attribute
(mproperty
, recv
)
2312 redef class AAttrAssignExpr
2315 var recv
= v
.expr
(self.n_expr
)
2316 if recv
== null then return
2317 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2318 var i
= v
.expr
(self.n_value
)
2319 if i
== null then return
2320 var mproperty
= self.mproperty
.as(not null)
2321 v
.write_attribute
(mproperty
, recv
, i
)
2325 redef class AAttrReassignExpr
2328 var recv
= v
.expr
(self.n_expr
)
2329 if recv
== null then return
2330 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2331 var value
= v
.expr
(self.n_value
)
2332 if value
== null then return
2333 var mproperty
= self.mproperty
.as(not null)
2334 var attr
= v
.read_attribute
(mproperty
, recv
)
2335 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
2337 v
.write_attribute
(mproperty
, recv
, res
)
2341 redef class AIssetAttrExpr
2344 var recv
= v
.expr
(self.n_expr
)
2345 if recv
== null then return null
2346 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2347 var mproperty
= self.mproperty
.as(not null)
2348 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
2352 redef class AVarargExpr
2355 return v
.expr
(self.n_expr
)
2359 redef class ANamedargExpr
2362 return v
.expr
(self.n_expr
)
2366 redef class ADebugTypeExpr