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 instance sharing the same data space as `txt`
346 fun c_string_instance_fast_cstr
(txt
: CString, from
: Int): Instance
348 var ncstr
= txt
.fast_cstring
(from
)
349 var t
= mainmodule
.c_string_type
351 var instance
= new PrimitiveInstance[CString](t
, ncstr
)
352 init_instance_primitive
(instance
)
357 # Return a new C string initialized of `length`
358 fun c_string_instance_len
(length
: Int): PrimitiveInstance[CString]
360 var val
= new CString(length
)
362 var t
= mainmodule
.c_string_type
363 var instance
= new PrimitiveInstance[CString](t
, val
)
364 init_instance_primitive
(instance
)
368 # Return a new String instance for `txt`
369 fun string_instance
(txt
: String): Instance
371 var nat
= c_string_instance
(txt
)
372 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
])
377 # The virtual type of the frames used in the execution engine
380 # The current frame used to store local variables of the current method executed
381 fun frame
: FRAME do return frames
.first
383 # The stack of all frames. The first one is the current one.
384 var frames
= new List[FRAME]
386 # Return a stack trace. One line per function
387 fun stack_trace
: String
389 var b
= new FlatBuffer
390 b
.append
(",---- Stack trace -- - - -\n")
392 b
.append
("| {f.mpropdef} ({f.current_node.location})\n")
394 b
.append
("`------------------- - - -")
398 # The current node, used to print errors, debug and stack-traces
399 fun current_node
: nullable ANode
401 if frames
.is_empty
then return null
402 return frames
.first
.current_node
405 # The dynamic type of the current `self`
406 fun current_receiver_class
: MClassType
408 return frames
.first
.arguments
.first
.mtype
.as(MClassType)
411 # Initialize the environment for a call and return a new Frame
412 # *`node` The AST node
413 # *`mpropdef` The corresponding mpropdef
414 # *`args` Arguments of the call
415 fun new_frame
(node
: ANode, mpropdef
: MPropDef, args
: Array[Instance]): FRAME
417 return new InterpreterFrame(node
, mpropdef
, args
)
420 # Exit the program with a message
421 fun fatal
(message
: String)
423 var node
= current_node
427 node
.fatal
(self, message
)
432 # Debug on the current node
433 fun debug
(message
: String)
435 var node
= current_node
443 # Retrieve the value of the variable in the current frame
444 fun read_variable
(v
: Variable): Instance
446 var f
= frames
.first
.as(InterpreterFrame)
450 # Assign the value of the variable in the current frame
451 fun write_variable
(v
: Variable, value
: Instance)
453 var f
= frames
.first
.as(InterpreterFrame)
457 # Store known methods, used to trace methods as they are reached
458 var discover_call_trace
: Set[MMethodDef] = new HashSet[MMethodDef]
460 # Evaluate `args` as expressions in the call of `mpropdef` on `recv`.
461 # This method is used to manage varargs in signatures and returns the real array
462 # of instances to use in the call.
463 # Return `null` if one of the evaluation of the arguments return null.
464 fun varargize
(mpropdef
: MMethodDef, map
: nullable SignatureMap, recv
: Instance, args
: SequenceRead[AExpr]): nullable Array[Instance]
466 var msignature
= mpropdef
.new_msignature
or else mpropdef
.msignature
.as(not null)
467 var res
= new Array[Instance]
470 if msignature
.arity
== 0 then return res
473 assert args
.length
== msignature
.arity
else debug
("Expected {msignature.arity} args, got {args.length}")
475 var e
= self.expr
(ne
)
476 if e
== null then return null
482 # Eval in order of arguments, not parameters
483 var exprs
= new Array[Instance].with_capacity
(args
.length
)
485 var e
= self.expr
(ne
)
486 if e
== null then return null
491 # Fill `res` with the result of the evaluation according to the mapping
492 for i
in [0..msignature
.arity
[ do
493 var param
= msignature
.mparameters
[i
]
494 var j
= map
.map
.get_or_null
(i
)
497 res
.add
(null_instance
)
500 if param
.is_vararg
and args
[i
].vararg_decl
> 0 then
501 var vararg
= exprs
.sub
(j
, args
[i
].vararg_decl
)
502 var elttype
= param
.mtype
.anchor_to
(self.mainmodule
, recv
.mtype
.as(MClassType))
503 var arg
= self.array_instance
(vararg
, elttype
)
512 # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
513 # Return a value if `mpropdef` is a function, or null if it is a procedure.
514 # The call is direct/static. There is no message-sending/late-binding.
515 fun call
(mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
517 if self.modelbuilder
.toolcontext
.opt_discover_call_trace
.value
and not self.discover_call_trace
.has
(mpropdef
) then
518 self.discover_call_trace
.add mpropdef
519 self.debug
("Discovered {mpropdef}")
521 assert args
.length
== mpropdef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mpropdef}. {args.length} arguments given.")
523 # Look for the AST node that implements the property
524 var val
= mpropdef
.constant_value
526 var node
= modelbuilder
.mpropdef2node
(mpropdef
)
527 if mpropdef
.is_abstract
then
529 self.frames
.unshift new_frame
(node
, mpropdef
, args
)
531 fatal
("Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
535 if node
isa APropdef then
536 self.parameter_check
(node
, mpropdef
, args
)
537 return node
.call
(self, mpropdef
, args
)
538 else if node
isa AClassdef then
539 self.parameter_check
(node
, mpropdef
, args
)
540 return node
.call
(self, mpropdef
, args
)
541 else if node
!= null then
542 fatal
("Fatal Error: method {mpropdef} associated to unexpected AST node {node.location}")
544 else if val
!= null then
545 return value_instance
(val
)
547 fatal
("Fatal Error: method {mpropdef} not found in the AST")
552 # Execute type checks of covariant parameters
553 fun parameter_check
(node
: ANode, mpropdef
: MMethodDef, args
: Array[Instance])
555 var msignature
= mpropdef
.msignature
.as(not null)
556 for i
in [0..msignature
.arity
[ do
557 var mp
= msignature
.mparameters
[i
]
559 # skip test for vararg since the array is instantiated with the correct polymorphic type
560 if mp
.is_vararg
then continue
562 # skip if the cast is not required
563 var origmtype
= mpropdef
.mproperty
.intro
.msignature
.mparameters
[i
].mtype
564 if not origmtype
.need_anchor
then continue
566 #print "{mpropdef}: {mpropdef.mproperty.intro.msignature.mparameters[i]}"
568 # get the parameter type
570 var anchor
= args
.first
.mtype
.as(MClassType)
571 var amtype
= mtype
.anchor_to
(self.mainmodule
, anchor
)
572 if not args
[i
+1].mtype
.is_subtype
(self.mainmodule
, anchor
, amtype
) then
573 node
.fatal
(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
578 # Common code for runtime injected calls and normal calls
579 fun send_commons
(mproperty
: MMethod, args
: Array[Instance], mtype
: MType): nullable Instance
581 if mtype
isa MNullType then
582 if mproperty
.name
== "==" or mproperty
.name
== "is_same_instance" then
583 return self.bool_instance
(args
[0] == args
[1])
584 else if mproperty
.name
== "!=" then
585 return self.bool_instance
(args
[0] != args
[1])
587 #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
588 fatal
("Receiver is null")
593 # Execute a full `callsite` for given `args`
594 # Use this method, instead of `send` to execute and control the additional behavior of the call-sites
595 fun callsite
(callsite
: nullable CallSite, arguments
: Array[Instance]): nullable Instance
597 if callsite
== null then return null
598 var initializers
= callsite
.mpropdef
.initializers
599 if not initializers
.is_empty
then
600 var recv
= arguments
.first
602 for p
in initializers
do
603 if p
isa MMethod then
605 for x
in p
.intro
.msignature
.mparameters
do
606 args
.add arguments
[i
]
610 else if p
isa MAttribute then
611 assert recv
isa MutableInstance
612 write_attribute
(p
, recv
, arguments
[i
])
616 assert i
== arguments
.length
618 return send
(callsite
.mproperty
, [recv
])
620 return send
(callsite
.mproperty
, arguments
)
623 # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
624 # Return a value if `mproperty` is a function, or null if it is a procedure.
625 # The call is polymorphic. There is a message-sending/late-binding according to the receiver (args[0]).
626 fun send
(mproperty
: MMethod, args
: Array[Instance]): nullable Instance
628 var recv
= args
.first
629 var mtype
= recv
.mtype
630 var ret
= send_commons
(mproperty
, args
, mtype
)
631 if ret
!= null then return ret
632 var propdef
= mproperty
.lookup_first_definition
(self.mainmodule
, mtype
)
633 return self.call
(propdef
, args
)
636 # Read the attribute `mproperty` of an instance `recv` and return its value.
637 # If the attribute in not yet initialized, then aborts with an error message.
638 fun read_attribute
(mproperty
: MAttribute, recv
: Instance): Instance
640 assert recv
isa MutableInstance
641 if not recv
.attributes
.has_key
(mproperty
) then
642 fatal
("Uninitialized attribute {mproperty.name}")
645 return recv
.attributes
[mproperty
]
648 # Replace in `recv` the value of the attribute `mproperty` by `value`
649 fun write_attribute
(mproperty
: MAttribute, recv
: Instance, value
: Instance)
651 assert recv
isa MutableInstance
652 recv
.attributes
[mproperty
] = value
655 # Is the attribute `mproperty` initialized the instance `recv`?
656 fun isset_attribute
(mproperty
: MAttribute, recv
: Instance): Bool
658 assert recv
isa MutableInstance
659 return recv
.attributes
.has_key
(mproperty
)
662 # Collect attributes of a type in the order of their init
663 fun collect_attr_propdef
(mtype
: MType): Array[AAttrPropdef]
665 var cache
= self.collect_attr_propdef_cache
666 if cache
.has_key
(mtype
) then return cache
[mtype
]
668 var res
= new Array[AAttrPropdef]
669 var cds
= mtype
.collect_mclassdefs
(self.mainmodule
).to_a
670 self.mainmodule
.linearize_mclassdefs
(cds
)
672 res
.add_all
(modelbuilder
.collect_attr_propdef
(cd
))
679 private var collect_attr_propdef_cache
= new HashMap[MType, Array[AAttrPropdef]]
681 # Fill the initial values of the newly created instance `recv`.
682 # `recv.mtype` is used to know what must be filled.
683 fun init_instance
(recv
: Instance)
685 for npropdef
in collect_attr_propdef
(recv
.mtype
) do
686 npropdef
.init_expr
(self, recv
)
690 # A hook to initialize a `PrimitiveInstance`
691 fun init_instance_primitive
(recv
: Instance) do end
693 # This function determines the correct type according to the receiver of the current propdef (self).
694 fun unanchor_type
(mtype
: MType): MType
696 return mtype
.anchor_to
(self.mainmodule
, current_receiver_class
)
699 # Placebo instance used to mark internal error result when `null` already have a meaning.
700 # TODO: replace with multiple return or something better
701 var error_instance
= new MutableInstance(modelbuilder
.model
.null_type
) is lazy
709 # The problematic node, if any
710 var node
: nullable ANode
713 # An instance represents a value of the executed program.
714 abstract class Instance
715 # The dynamic type of the instance
716 # ASSERT: not self.mtype.is_anchored
719 # Return `true` if the instance is the `true` value.
721 # Return `false` if the instance is the `false` value.
722 # Abort if the instance is not a boolean value.
723 fun is_true
: Bool do abort
725 # Return true if `self` IS `o` (using the Nit semantic of is)
726 fun eq_is
(o
: Instance): Bool do return self.is_same_instance
(o
)
728 # Human readable object identity "Type#number"
729 redef fun to_s
do return "{mtype}"
731 # Return the integer value if the instance is an integer.
733 fun to_i
: Int do abort
735 # Return the integer value if the instance is a float.
737 fun to_f
: Float do abort
739 # Return the integer value if the instance is a byte.
741 fun to_b
: Byte do abort
743 # Return the integer value if the instance is a int8.
745 fun to_i8
: Int8 do abort
747 # Return the integer value if the instance is a int16.
749 fun to_i16
: Int16 do abort
751 # Return the integer value if the instance is a uint16.
753 fun to_u16
: UInt16 do abort
755 # Return the integer value if the instance is a int32.
757 fun to_i32
: Int32 do abort
759 # Return the integer value if the instance is a uint32.
761 fun to_u32
: UInt32 do abort
763 # The real value encapsulated if the instance is primitive.
765 fun val
: nullable Object do abort
768 # A instance with attribute (standards objects)
769 class MutableInstance
772 # The values of the attributes
773 var attributes
: Map[MAttribute, Instance] = new HashMap[MAttribute, Instance]
776 # Special instance to handle primitives values (int, bool, etc.)
777 # The trick is just to encapsulate the “real” value.
778 class PrimitiveInstance[E
]
781 # The real value encapsulated
786 if val
== true then return true
787 if val
== false then return false
793 if not o
isa PrimitiveInstance[nullable Object] then return false
794 return self.val
== o
.val
799 if not o
isa PrimitiveInstance[nullable Object] then return false
800 return self.val
.is_same_instance
(o
.val
)
803 redef fun to_s
do return "{mtype}#{val.object_id}({val or else "null"})"
805 redef fun to_i
do return val
.as(Int)
807 redef fun to_f
do return val
.as(Float)
809 redef fun to_b
do return val
.as(Byte)
811 redef fun to_i8
do return val
.as(Int8)
813 redef fun to_i16
do return val
.as(Int16)
815 redef fun to_u16
do return val
.as(UInt16)
817 redef fun to_i32
do return val
.as(Int32)
819 redef fun to_u32
do return val
.as(UInt32)
822 # Information about local variables in a running method
824 # The current visited node
825 # The node is stored by frame to keep a stack trace
826 var current_node
: ANode
827 # The executed property.
828 # A Method in case of a call, an attribute in case of a default initialization.
829 var mpropdef
: MPropDef
830 # Arguments of the method (the first is the receiver)
831 var arguments
: Array[Instance]
832 # Indicate if the expression has an array comprehension form
833 var comprehension
: nullable Array[Instance] = null
836 # Implementation of a Frame with a Hashmap to store local variables
837 class InterpreterFrame
840 # Mapping between a variable and the current value
841 var map
: Map[Variable, Instance] = new HashMap[Variable, Instance]
845 # Aborts the program with a message
846 # `v` is used to know if a colored message is displayed or not
847 fun fatal
(v
: NaiveInterpreter, message
: String)
849 # Abort if there is a `catch` block
850 if v
.catch_count
> 0 then
851 v
.last_error
= new FatalError(message
, self)
855 if v
.modelbuilder
.toolcontext
.opt_no_color
.value
then
856 sys
.stderr
.write
("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
858 sys
.stderr
.write
("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
859 sys
.stderr
.write
(v
.stack_trace
)
860 sys
.stderr
.write
("\n")
867 # Execute a `mpropdef` associated with the current node.
868 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
870 fatal
(v
, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
875 redef class AMethPropdef
878 redef fun call
(v
, mpropdef
, args
)
880 var f
= v
.new_frame
(self, mpropdef
, args
)
881 var res
= call_commons
(v
, mpropdef
, args
, f
)
883 if v
.is_escape
(self.return_mark
) then
890 # Execution of the body of the method
892 # It handle the common special cases: super, intern, extern
893 fun call_commons
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
897 for i
in [0..mpropdef
.msignature
.arity
[ do
898 var variable
= self.n_signature
.n_params
[i
].variable
899 assert variable
!= null
900 v
.write_variable
(variable
, arguments
[i
+1])
903 # Call the implicit super-init
904 var auto_super_inits
= self.auto_super_inits
905 if auto_super_inits
!= null then
906 var args
= [arguments
.first
]
907 for auto_super_init
in auto_super_inits
do
909 for i
in [0..auto_super_init
.msignature
.arity
+1[ do
910 args
.add
(arguments
[i
])
912 assert auto_super_init
.mproperty
!= mpropdef
.mproperty
913 v
.callsite
(auto_super_init
, args
)
916 if auto_super_call
then
917 # standard call-next-method
918 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
919 v
.call
(superpd
, arguments
)
923 if mpropdef
.is_intern
or mpropdef
.is_extern
then
924 var res
= intern_call
(v
, mpropdef
, arguments
)
925 if res
!= v
.error_instance
then return res
928 if mpropdef
.is_extern
then
929 var res
= call_extern
(v
, mpropdef
, arguments
, f
)
930 if res
!= v
.error_instance
then return res
933 if n_block
!= null then
938 # Fail if nothing succeed
939 if mpropdef
.is_intern
then
940 fatal
(v
, "NOT YET IMPLEMENTED intern {mpropdef}")
941 else if mpropdef
.is_extern
then
942 fatal
(v
, "NOT YET IMPLEMENTED extern {mpropdef}")
944 fatal
(v
, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
949 # Call this extern method
950 protected fun call_extern
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance], f
: Frame): nullable Instance
952 return v
.error_instance
955 # Interprets a intern or a shortcut extern method.
956 # Returns the result for a function, `null` for a procedure, or `error_instance` if the method is unknown.
957 private fun intern_call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, args
: Array[Instance]): nullable Instance
959 var pname
= mpropdef
.mproperty
.name
960 var cname
= mpropdef
.mclassdef
.mclass
.name
961 if pname
== "output" then
962 var recv
= args
.first
965 else if pname
== "object_id" then
966 var recv
= args
.first
967 if recv
isa PrimitiveInstance[Object] then
968 return v
.int_instance
(recv
.val
.object_id
)
970 return v
.int_instance
(recv
.object_id
)
972 else if pname
== "output_class_name" then
973 var recv
= args
.first
976 else if pname
== "native_class_name" then
977 var recv
= args
.first
978 var txt
= recv
.mtype
.to_s
979 return v
.c_string_instance
(txt
)
980 else if pname
== "==" then
981 # == is correctly redefined for instances
982 return v
.bool_instance
(args
[0] == args
[1])
983 else if pname
== "!=" then
984 return v
.bool_instance
(args
[0] != args
[1])
985 else if pname
== "is_same_type" then
986 return v
.bool_instance
(args
[0].mtype
== args
[1].mtype
)
987 else if pname
== "is_same_instance" then
988 return v
.bool_instance
(args
[0].eq_is
(args
[1]))
989 else if pname
== "class_inheritance_metamodel_json" then
990 return v
.c_string_instance
(v
.mainmodule
.flatten_mclass_hierarchy
.to_thin_json
)
991 else if pname
== "exit" then
994 else if pname
== "buffer_mode_full" then
995 return v
.int_instance
(sys
.buffer_mode_full
)
996 else if pname
== "buffer_mode_line" then
997 return v
.int_instance
(sys
.buffer_mode_line
)
998 else if pname
== "buffer_mode_none" then
999 return v
.int_instance
(sys
.buffer_mode_none
)
1000 else if pname
== "sys" then
1002 else if cname
== "Int" then
1003 var recvval
= args
[0].to_i
1004 if pname
== "unary -" then
1005 return v
.int_instance
(-recvval
)
1006 else if pname
== "unary +" then
1008 else if pname
== "+" then
1009 return v
.int_instance
(recvval
+ args
[1].to_i
)
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
.bool_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
.int_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
== "to_f" then
1033 return v
.float_instance
(recvval
.to_f
)
1034 else if pname
== "to_b" then
1035 return v
.byte_instance
(recvval
.to_b
)
1036 else if pname
== "<<" then
1037 return v
.int_instance
(recvval
<< args
[1].to_i
)
1038 else if pname
== ">>" then
1039 return v
.int_instance
(recvval
>> args
[1].to_i
)
1040 else if pname
== "to_i8" then
1041 return v
.int8_instance
(recvval
.to_i8
)
1042 else if pname
== "to_i16" then
1043 return v
.int16_instance
(recvval
.to_i16
)
1044 else if pname
== "to_u16" then
1045 return v
.uint16_instance
(recvval
.to_u16
)
1046 else if pname
== "to_i32" then
1047 return v
.int32_instance
(recvval
.to_i32
)
1048 else if pname
== "to_u32" then
1049 return v
.uint32_instance
(recvval
.to_u32
)
1051 else if cname
== "Byte" then
1052 var recvval
= args
[0].to_b
1053 if pname
== "unary -" then
1054 return v
.byte_instance
(-recvval
)
1055 else if pname
== "unary +" then
1057 else if pname
== "+" then
1058 return v
.byte_instance
(recvval
+ args
[1].to_b
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_b
)
1077 else if pname
== "&" then
1078 return v
.byte_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
== "to_f" then
1082 return v
.float_instance
(recvval
.to_f
)
1083 else if pname
== "to_i" then
1084 return v
.int_instance
(recvval
.to_i
)
1085 else if pname
== "<<" then
1086 return v
.byte_instance
(recvval
<< args
[1].to_i
)
1087 else if pname
== ">>" then
1088 return v
.byte_instance
(recvval
>> args
[1].to_i
)
1089 else if pname
== "to_i8" then
1090 return v
.int8_instance
(recvval
.to_i8
)
1091 else if pname
== "to_i16" then
1092 return v
.int16_instance
(recvval
.to_i16
)
1093 else if pname
== "to_u16" then
1094 return v
.uint16_instance
(recvval
.to_u16
)
1095 else if pname
== "to_i32" then
1096 return v
.int32_instance
(recvval
.to_i32
)
1097 else if pname
== "to_u32" then
1098 return v
.uint32_instance
(recvval
.to_u32
)
1099 else if pname
== "byte_to_s_len" then
1100 return v
.int_instance
(recvval
.to_s
.length
)
1102 else if cname
== "Char" then
1103 var recv
= args
[0].val
.as(Char)
1104 if pname
== "successor" then
1105 return v
.char_instance
(recv
.successor
(args
[1].to_i
))
1106 else if pname
== "predecessor" then
1107 return v
.char_instance
(recv
.predecessor
(args
[1].to_i
))
1108 else if pname
== "<" then
1109 return v
.bool_instance
(recv
< args
[1].val
.as(Char))
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
.int_instance
(recv
<=> args
[1].val
.as(Char))
1119 else if cname
== "Float" then
1120 var recv
= args
[0].to_f
1121 if pname
== "unary -" then
1122 return v
.float_instance
(-recv
)
1123 else if pname
== "unary +" then
1125 else if pname
== "+" then
1126 return v
.float_instance
(recv
+ args
[1].to_f
)
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
.bool_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
== "to_i" then
1142 return v
.int_instance
(recv
.to_i
)
1143 else if pname
== "to_b" then
1144 return v
.byte_instance
(recv
.to_b
)
1145 else if pname
== "to_i8" then
1146 return v
.int8_instance
(recv
.to_i8
)
1147 else if pname
== "to_i16" then
1148 return v
.int16_instance
(recv
.to_i16
)
1149 else if pname
== "to_u16" then
1150 return v
.uint16_instance
(recv
.to_u16
)
1151 else if pname
== "to_i32" then
1152 return v
.int32_instance
(recv
.to_i32
)
1153 else if pname
== "to_u32" then
1154 return v
.uint32_instance
(recv
.to_u32
)
1155 else if pname
== "cos" then
1156 return v
.float_instance
(args
[0].to_f
.cos
)
1157 else if pname
== "sin" then
1158 return v
.float_instance
(args
[0].to_f
.sin
)
1159 else if pname
== "tan" then
1160 return v
.float_instance
(args
[0].to_f
.tan
)
1161 else if pname
== "acos" then
1162 return v
.float_instance
(args
[0].to_f
.acos
)
1163 else if pname
== "asin" then
1164 return v
.float_instance
(args
[0].to_f
.asin
)
1165 else if pname
== "atan" then
1166 return v
.float_instance
(args
[0].to_f
.atan
)
1167 else if pname
== "sqrt" then
1168 return v
.float_instance
(args
[0].to_f
.sqrt
)
1169 else if pname
== "exp" then
1170 return v
.float_instance
(args
[0].to_f
.exp
)
1171 else if pname
== "log" then
1172 return v
.float_instance
(args
[0].to_f
.log
)
1173 else if pname
== "pow" then
1174 return v
.float_instance
(args
[0].to_f
.pow
(args
[1].to_f
))
1175 else if pname
== "abs" then
1176 return v
.float_instance
(args
[0].to_f
.abs
)
1177 else if pname
== "hypot_with" then
1178 return v
.float_instance
(args
[0].to_f
.hypot_with
(args
[1].to_f
))
1179 else if pname
== "is_nan" then
1180 return v
.bool_instance
(args
[0].to_f
.is_nan
)
1181 else if pname
== "is_inf_extern" then
1182 return v
.bool_instance
(args
[0].to_f
.is_inf
!= 0)
1183 else if pname
== "round" then
1184 return v
.float_instance
(args
[0].to_f
.round
)
1186 else if cname
== "CString" then
1187 if pname
== "new" then
1188 return v
.c_string_instance_len
(args
[1].to_i
)
1190 var recvval
= args
.first
.val
.as(CString)
1191 if pname
== "[]" then
1192 var arg1
= args
[1].to_i
1193 return v
.byte_instance
(recvval
[arg1
])
1194 else if pname
== "[]=" then
1195 var arg1
= args
[1].to_i
1196 recvval
[arg1
] = args
[2].val
.as(Byte)
1198 else if pname
== "copy_to" then
1199 # sig= copy_to(dest: CString, length: Int, from: Int, to: Int)
1200 var destval
= args
[1].val
.as(CString)
1201 var lenval
= args
[2].to_i
1202 var fromval
= args
[3].to_i
1203 var toval
= args
[4].to_i
1204 recvval
.copy_to
(destval
, lenval
, fromval
, toval
)
1206 else if pname
== "atoi" then
1207 return v
.int_instance
(recvval
.atoi
)
1208 else if pname
== "fast_cstring" then
1209 return v
.c_string_instance_fast_cstr
(args
[0].val
.as(CString), args
[1].to_i
)
1210 else if pname
== "fetch_4_chars" then
1211 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_chars
(args
[1].to_i
))
1212 else if pname
== "fetch_4_hchars" then
1213 return v
.uint32_instance
(args
[0].val
.as(CString).fetch_4_hchars
(args
[1].to_i
))
1214 else if pname
== "utf8_length" then
1215 return v
.int_instance
(args
[0].val
.as(CString).utf8_length
(args
[1].to_i
, args
[2].to_i
))
1217 else if cname
== "NativeArray" then
1218 if pname
== "new" then
1219 var val
= new Array[Instance].filled_with
(v
.null_instance
, args
[1].to_i
)
1220 var instance
= new PrimitiveInstance[Array[Instance]](args
[0].mtype
, val
)
1221 v
.init_instance_primitive
(instance
)
1224 var recvval
= args
.first
.val
.as(Array[Instance])
1225 if pname
== "[]" then
1226 return recvval
[args
[1].to_i
]
1227 else if pname
== "[]=" then
1228 recvval
[args
[1].to_i
] = args
[2]
1230 else if pname
== "length" then
1231 return v
.int_instance
(recvval
.length
)
1232 else if pname
== "copy_to" then
1233 recvval
.copy_to
(0, args
[2].to_i
, args
[1].val
.as(Array[Instance]), 0)
1236 else if cname
== "Int8" then
1237 var recvval
= args
[0].to_i8
1238 if pname
== "unary -" then
1239 return v
.int8_instance
(-recvval
)
1240 else if pname
== "unary +" then
1242 else if pname
== "+" then
1243 return v
.int8_instance
(recvval
+ args
[1].to_i8
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_i8
)
1262 else if pname
== "to_f" then
1263 return v
.float_instance
(recvval
.to_f
)
1264 else if pname
== "to_i" then
1265 return v
.int_instance
(recvval
.to_i
)
1266 else if pname
== "to_b" then
1267 return v
.byte_instance
(recvval
.to_b
)
1268 else if pname
== "to_i16" then
1269 return v
.int16_instance
(recvval
.to_i16
)
1270 else if pname
== "to_u16" then
1271 return v
.uint16_instance
(recvval
.to_u16
)
1272 else if pname
== "to_i32" then
1273 return v
.int32_instance
(recvval
.to_i32
)
1274 else if pname
== "to_u32" then
1275 return v
.uint32_instance
(recvval
.to_u32
)
1276 else if pname
== "<<" then
1277 return v
.int8_instance
(recvval
<< (args
[1].to_i
))
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_i8
)
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
== "unary ~" then
1287 return v
.int8_instance
(~recvval
)
1289 else if cname
== "Int16" then
1290 var recvval
= args
[0].to_i16
1291 if pname
== "unary -" then
1292 return v
.int16_instance
(-recvval
)
1293 else if pname
== "unary +" then
1295 else if pname
== "+" then
1296 return v
.int16_instance
(recvval
+ args
[1].to_i16
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_i16
)
1315 else if pname
== "to_f" then
1316 return v
.float_instance
(recvval
.to_f
)
1317 else if pname
== "to_i" then
1318 return v
.int_instance
(recvval
.to_i
)
1319 else if pname
== "to_b" then
1320 return v
.byte_instance
(recvval
.to_b
)
1321 else if pname
== "to_i8" then
1322 return v
.int8_instance
(recvval
.to_i8
)
1323 else if pname
== "to_u16" then
1324 return v
.uint16_instance
(recvval
.to_u16
)
1325 else if pname
== "to_i32" then
1326 return v
.int32_instance
(recvval
.to_i32
)
1327 else if pname
== "to_u32" then
1328 return v
.uint32_instance
(recvval
.to_u32
)
1329 else if pname
== "<<" then
1330 return v
.int16_instance
(recvval
<< (args
[1].to_i
))
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_i16
)
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
== "unary ~" then
1340 return v
.int16_instance
(~recvval
)
1342 else if cname
== "UInt16" then
1343 var recvval
= args
[0].to_u16
1344 if pname
== "unary -" then
1345 return v
.uint16_instance
(-recvval
)
1346 else if pname
== "unary +" then
1348 else if pname
== "+" then
1349 return v
.uint16_instance
(recvval
+ args
[1].to_u16
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_u16
)
1368 else if pname
== "to_f" then
1369 return v
.float_instance
(recvval
.to_f
)
1370 else if pname
== "to_i" then
1371 return v
.int_instance
(recvval
.to_i
)
1372 else if pname
== "to_b" then
1373 return v
.byte_instance
(recvval
.to_b
)
1374 else if pname
== "to_i8" then
1375 return v
.int8_instance
(recvval
.to_i8
)
1376 else if pname
== "to_i16" then
1377 return v
.int16_instance
(recvval
.to_i16
)
1378 else if pname
== "to_i32" then
1379 return v
.int32_instance
(recvval
.to_i32
)
1380 else if pname
== "to_u32" then
1381 return v
.uint32_instance
(recvval
.to_u32
)
1382 else if pname
== "<<" then
1383 return v
.uint16_instance
(recvval
<< (args
[1].to_i
))
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_u16
)
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
== "unary ~" then
1393 return v
.uint16_instance
(~recvval
)
1395 else if cname
== "Int32" then
1396 var recvval
= args
[0].to_i32
1397 if pname
== "unary -" then
1398 return v
.int32_instance
(-recvval
)
1399 else if pname
== "unary +" then
1401 else if pname
== "+" then
1402 return v
.int32_instance
(recvval
+ args
[1].to_i32
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_i32
)
1421 else if pname
== "to_f" then
1422 return v
.float_instance
(recvval
.to_f
)
1423 else if pname
== "to_i" then
1424 return v
.int_instance
(recvval
.to_i
)
1425 else if pname
== "to_b" then
1426 return v
.byte_instance
(recvval
.to_b
)
1427 else if pname
== "to_i8" then
1428 return v
.int8_instance
(recvval
.to_i8
)
1429 else if pname
== "to_i16" then
1430 return v
.int16_instance
(recvval
.to_i16
)
1431 else if pname
== "to_u16" then
1432 return v
.uint16_instance
(recvval
.to_u16
)
1433 else if pname
== "to_u32" then
1434 return v
.uint32_instance
(recvval
.to_u32
)
1435 else if pname
== "<<" then
1436 return v
.int32_instance
(recvval
<< (args
[1].to_i
))
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_i32
)
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
== "unary ~" then
1446 return v
.int32_instance
(~recvval
)
1448 else if cname
== "UInt32" then
1449 var recvval
= args
[0].to_u32
1450 if pname
== "unary -" then
1451 return v
.uint32_instance
(-recvval
)
1452 else if pname
== "unary +" then
1454 else if pname
== "+" then
1455 return v
.uint32_instance
(recvval
+ args
[1].to_u32
)
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
.bool_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
.int_instance
(recvval
<=> args
[1].to_u32
)
1474 else if pname
== "to_f" then
1475 return v
.float_instance
(recvval
.to_f
)
1476 else if pname
== "to_i" then
1477 return v
.int_instance
(recvval
.to_i
)
1478 else if pname
== "to_b" then
1479 return v
.byte_instance
(recvval
.to_b
)
1480 else if pname
== "to_i8" then
1481 return v
.int8_instance
(recvval
.to_i8
)
1482 else if pname
== "to_i16" then
1483 return v
.int16_instance
(recvval
.to_i16
)
1484 else if pname
== "to_u16" then
1485 return v
.uint16_instance
(recvval
.to_u16
)
1486 else if pname
== "to_i32" then
1487 return v
.int32_instance
(recvval
.to_i32
)
1488 else if pname
== "<<" then
1489 return v
.uint32_instance
(recvval
<< (args
[1].to_i
))
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_u32
)
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
== "unary ~" then
1499 return v
.uint32_instance
(~recvval
)
1501 else if pname
== "native_argc" then
1502 return v
.int_instance
(v
.arguments
.length
)
1503 else if pname
== "native_argv" then
1504 var txt
= v
.arguments
[args
[1].to_i
]
1505 return v
.c_string_instance
(txt
)
1506 else if pname
== "lexer_goto" then
1507 return v
.int_instance
(lexer_goto
(args
[1].to_i
, args
[2].to_i
))
1508 else if pname
== "lexer_accept" then
1509 return v
.int_instance
(lexer_accept
(args
[1].to_i
))
1510 else if pname
== "parser_goto" then
1511 return v
.int_instance
(parser_goto
(args
[1].to_i
, args
[2].to_i
))
1512 else if pname
== "parser_action" then
1513 return v
.int_instance
(parser_action
(args
[1].to_i
, args
[2].to_i
))
1515 return v
.error_instance
1519 redef class AAttrPropdef
1520 redef fun call
(v
, mpropdef
, args
)
1522 var recv
= args
.first
1523 assert recv
isa MutableInstance
1524 var attr
= self.mpropdef
.mproperty
1525 if mpropdef
== mreadpropdef
then
1526 assert args
.length
== 1
1527 if not is_lazy
or v
.isset_attribute
(attr
, recv
) then return v
.read_attribute
(attr
, recv
)
1528 var f
= v
.new_frame
(self, mpropdef
, args
)
1529 return evaluate_expr
(v
, recv
, f
)
1530 else if mpropdef
== mwritepropdef
then
1531 assert args
.length
== 2
1533 if is_optional
and arg
.mtype
isa MNullType then
1534 var f
= v
.new_frame
(self, mpropdef
, args
)
1535 arg
= evaluate_expr
(v
, recv
, f
)
1537 v
.write_attribute
(attr
, recv
, arg
)
1544 # Evaluate and set the default value of the attribute in `recv`
1545 private fun init_expr
(v
: NaiveInterpreter, recv
: Instance)
1547 if is_lazy
or is_optional
then return
1549 var f
= v
.new_frame
(self, mreadpropdef
.as(not null), [recv
])
1550 evaluate_expr
(v
, recv
, f
)
1553 var mpropdef
= self.mpropdef
1554 if mpropdef
== null then return
1555 var mtype
= self.mtype
.as(not null)
1556 mtype
= mtype
.anchor_to
(v
.mainmodule
, recv
.mtype
.as(MClassType))
1557 if mtype
isa MNullableType then
1558 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, v
.null_instance
)
1562 private fun evaluate_expr
(v
: NaiveInterpreter, recv
: Instance, f
: Frame): Instance
1564 assert recv
isa MutableInstance
1569 var nexpr
= self.n_expr
1570 var nblock
= self.n_block
1571 if nexpr
!= null then
1573 else if nblock
!= null then
1575 assert v
.escapemark
== return_mark
1584 assert not v
.is_escaping
1585 v
.write_attribute
(self.mpropdef
.mproperty
, recv
, val
)
1590 redef class AClassdef
1591 # Execute an implicit `mpropdef` associated with the current node.
1592 private fun call
(v
: NaiveInterpreter, mpropdef
: MMethodDef, arguments
: Array[Instance]): nullable Instance
1594 if mpropdef
.mproperty
.is_root_init
then
1595 assert arguments
.length
== 1
1596 if not mpropdef
.is_intro
then
1597 # standard call-next-method
1598 var superpd
= mpropdef
.lookup_next_definition
(v
.mainmodule
, arguments
.first
.mtype
)
1599 v
.call
(superpd
, arguments
)
1609 # Evaluate the node as a possible expression.
1610 # Return a possible value
1611 # NOTE: Do not call this method directly, but use `v.expr`
1612 # This method is here to be implemented by subclasses.
1613 protected fun expr
(v
: NaiveInterpreter): nullable Instance
1615 fatal
(v
, "NOT YET IMPLEMENTED expr {class_name}")
1619 # Evaluate the node as a statement.
1620 # NOTE: Do not call this method directly, but use `v.stmt`
1621 # This method is here to be implemented by subclasses (no need to return something).
1622 protected fun stmt
(v
: NaiveInterpreter)
1629 redef class ABlockExpr
1632 var last
= self.n_expr
.last
1633 for e
in self.n_expr
do
1634 if e
== last
then break
1636 if v
.is_escaping
then return null
1643 for e
in self.n_expr
do
1645 if v
.is_escaping
then return
1650 redef class AVardeclExpr
1653 var ne
= self.n_expr
1656 if i
== null then return null
1657 v
.write_variable
(self.variable
.as(not null), i
)
1664 redef class AVarExpr
1667 return v
.read_variable
(self.variable
.as(not null))
1671 redef class AVarAssignExpr
1674 var i
= v
.expr
(self.n_value
)
1675 if i
== null then return null
1676 v
.write_variable
(self.variable
.as(not null), i
)
1681 redef class AVarReassignExpr
1684 var variable
= self.variable
.as(not null)
1685 var vari
= v
.read_variable
(variable
)
1686 var value
= v
.expr
(self.n_value
)
1687 if value
== null then return
1688 var res
= v
.callsite
(reassign_callsite
, [vari
, value
])
1690 v
.write_variable
(variable
, res
)
1694 redef class ASelfExpr
1697 return v
.frame
.arguments
.first
1701 redef class AImplicitSelfExpr
1704 if not is_sys
then return super
1709 redef class AEscapeExpr
1712 var ne
= self.n_expr
1715 if i
== null then return
1718 v
.escapevalue
= null
1720 v
.escapemark
= self.escapemark
1724 redef class AAbortExpr
1735 var cond
= v
.expr
(self.n_expr
)
1736 if cond
== null then return null
1737 if cond
.is_true
then
1738 return v
.expr
(self.n_then
.as(not null))
1740 return v
.expr
(self.n_else
.as(not null))
1746 var cond
= v
.expr
(self.n_expr
)
1747 if cond
== null then return
1748 if cond
.is_true
then
1756 redef class AIfexprExpr
1759 var cond
= v
.expr
(self.n_expr
)
1760 if cond
== null then return null
1761 if cond
.is_true
then
1762 return v
.expr
(self.n_then
)
1764 return v
.expr
(self.n_else
)
1772 # If this bloc has a catch, handle it with a do ... catch ... end
1773 if self.n_catch
!= null then
1777 v
.stmt
(self.n_block
)
1778 v
.is_escape
(self.break_mark
) # Clear the break (if any)
1781 # Restore the current frame if needed
1782 while v
.frame
!= frame
do v
.frames
.shift
1784 v
.stmt
(self.n_catch
)
1787 v
.stmt
(self.n_block
)
1788 v
.is_escape
(self.break_mark
)
1793 redef class AWhileExpr
1797 var cond
= v
.expr
(self.n_expr
)
1798 if cond
== null then return
1799 if not cond
.is_true
then return
1800 v
.stmt
(self.n_block
)
1801 if v
.is_escape
(self.break_mark
) then return
1802 v
.is_escape
(self.continue_mark
) # Clear the break
1803 if v
.is_escaping
then return
1808 redef class ALoopExpr
1812 v
.stmt
(self.n_block
)
1813 if v
.is_escape
(self.break_mark
) then return
1814 v
.is_escape
(self.continue_mark
) # Clear the break
1815 if v
.is_escaping
then return
1820 redef class AForExpr
1823 var iters
= new Array[Instance]
1825 for g
in n_groups
do
1826 var col
= v
.expr
(g
.n_expr
)
1827 if col
== null then return
1828 if col
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
1830 var iter
= v
.callsite
(g
.method_iterator
, [col
]).as(not null)
1835 for g
in n_groups
, iter
in iters
do
1836 var isok
= v
.callsite
(g
.method_is_ok
, [iter
]).as(not null)
1837 if not isok
.is_true
then break label
1838 if g
.variables
.length
== 1 then
1839 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1840 #self.debug("item {item}")
1841 v
.write_variable
(g
.variables
.first
, item
)
1842 else if g
.variables
.length
== 2 then
1843 var key
= v
.callsite
(g
.method_key
, [iter
]).as(not null)
1844 v
.write_variable
(g
.variables
[0], key
)
1845 var item
= v
.callsite
(g
.method_item
, [iter
]).as(not null)
1846 v
.write_variable
(g
.variables
[1], item
)
1851 v
.stmt
(self.n_block
)
1852 if v
.is_escape
(self.break_mark
) then break
1853 v
.is_escape
(self.continue_mark
) # Clear the break
1854 if v
.is_escaping
then break
1855 for g
in n_groups
, iter
in iters
do
1856 v
.callsite
(g
.method_next
, [iter
])
1859 for g
in n_groups
, iter
in iters
do
1860 var method_finish
= g
.method_finish
1861 if method_finish
!= null then
1862 v
.callsite
(method_finish
, [iter
])
1868 redef class AWithExpr
1871 var expr
= v
.expr
(self.n_expr
)
1872 if expr
== null then return
1874 v
.callsite
(method_start
, [expr
])
1875 v
.stmt
(self.n_block
)
1876 v
.is_escape
(self.break_mark
) # Clear the break
1878 # Execute the finally without an escape
1879 var old_mark
= v
.escapemark
1881 v
.callsite
(method_finish
, [expr
])
1882 # Restore the escape unless another escape was provided
1883 if v
.escapemark
== null then v
.escapemark
= old_mark
1887 redef class AAssertExpr
1890 var cond
= v
.expr
(self.n_expr
)
1891 if cond
== null then return
1892 if not cond
.is_true
then
1894 if v
.is_escaping
then return
1896 # Explain assert if it fails
1897 var explain_assert_str
= explain_assert_str
1898 if explain_assert_str
!= null then
1899 var i
= v
.expr
(explain_assert_str
)
1900 if i
isa MutableInstance then
1901 var res
= v
.send
(v
.force_get_primitive_method
("to_cstring", i
.mtype
), [i
])
1905 print_error
"Runtime assert: {val.to_s}"
1913 fatal
(v
, "Assert '{nid.text}' failed")
1915 fatal
(v
, "Assert failed")
1925 var cond
= v
.expr
(self.n_expr
)
1926 if cond
== null then return null
1927 if cond
.is_true
then return cond
1928 return v
.expr
(self.n_expr2
)
1932 redef class AImpliesExpr
1935 var cond
= v
.expr
(self.n_expr
)
1936 if cond
== null then return null
1937 if not cond
.is_true
then return v
.true_instance
1938 return v
.expr
(self.n_expr2
)
1942 redef class AAndExpr
1945 var cond
= v
.expr
(self.n_expr
)
1946 if cond
== null then return null
1947 if not cond
.is_true
then return cond
1948 return v
.expr
(self.n_expr2
)
1952 redef class ANotExpr
1955 var cond
= v
.expr
(self.n_expr
)
1956 if cond
== null then return null
1957 return v
.bool_instance
(not cond
.is_true
)
1961 redef class AOrElseExpr
1964 var i
= v
.expr
(self.n_expr
)
1965 if i
== null then return null
1966 if i
!= v
.null_instance
then return i
1967 return v
.expr
(self.n_expr2
)
1971 redef class AIntegerExpr
1974 if value
isa Int then return v
.int_instance
(value
.as(Int))
1975 if value
isa Byte then return v
.byte_instance
(value
.as(Byte))
1976 if value
isa Int8 then return v
.int8_instance
(value
.as(Int8))
1977 if value
isa Int16 then return v
.int16_instance
(value
.as(Int16))
1978 if value
isa UInt16 then return v
.uint16_instance
(value
.as(UInt16))
1979 if value
isa Int32 then return v
.int32_instance
(value
.as(Int32))
1980 if value
isa UInt32 then return v
.uint32_instance
(value
.as(UInt32))
1985 redef class AFloatExpr
1988 return v
.float_instance
(self.value
.as(not null))
1992 redef class ACharExpr
1995 if is_ascii
then return v
.byte_instance
(self.value
.as(not null).ascii
)
1996 if is_code_point
then return v
.int_instance
(self.value
.as(not null).code_point
)
1997 return v
.char_instance
(self.value
.as(not null))
2001 redef class AArrayExpr
2004 var val
= new Array[Instance]
2005 var old_comprehension
= v
.frame
.comprehension
2006 v
.frame
.comprehension
= val
2007 for nexpr
in self.n_exprs
do
2008 if nexpr
isa AForExpr then
2011 var i
= v
.expr
(nexpr
)
2012 if i
== null then return null
2016 v
.frame
.comprehension
= old_comprehension
2017 var mtype
= v
.unanchor_type
(self.mtype
.as(not null)).as(MClassType)
2018 var elttype
= mtype
.arguments
.first
2019 return v
.array_instance
(val
, elttype
)
2023 redef class AugmentedStringFormExpr
2024 # Factorize the making of a `Regex` object from a literal prefixed string
2025 fun make_re
(v
: NaiveInterpreter, rs
: Instance): nullable Instance do
2028 var res
= v
.callsite
(tore
, [rs
])
2030 print
"Cannot call property `to_re` on {self}"
2033 for j
in suffix
.chars
do
2035 var prop
= ignore_case
2037 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2043 v
.callsite
(prop
, [res
, v
.bool_instance
(true)])
2049 v
.callsite
(prop
, [res
, v
.bool_instance
(false)])
2052 # Should not happen, this needs to be updated
2053 # along with the addition of new suffixes
2060 redef class AStringFormExpr
2061 redef fun expr
(v
) do return v
.string_instance
(value
)
2064 redef class AStringExpr
2065 redef fun expr
(v
) do
2066 var s
= v
.string_instance
(value
)
2067 if is_string
then return s
2068 if is_bytestring
then
2069 var ns
= v
.c_string_instance_from_ns
(bytes
.items
, bytes
.length
)
2070 var ln
= v
.int_instance
(bytes
.length
)
2071 var prop
= to_bytes_with_copy
2073 var res
= v
.callsite
(prop
, [ns
, ln
])
2075 print
"Cannot call property `to_bytes` on {self}"
2080 var res
= make_re
(v
, s
)
2084 print
"Unimplemented prefix or suffix for {self}"
2091 redef class ASuperstringExpr
2094 var array
= new Array[Instance]
2095 for nexpr
in n_exprs
do
2096 var i
= v
.expr
(nexpr
)
2097 if i
== null then return null
2100 var i
= v
.array_instance
(array
, v
.mainmodule
.object_type
)
2101 var res
= v
.send
(v
.force_get_primitive_method
("plain_to_s", i
.mtype
), [i
])
2103 if is_re
then res
= make_re
(v
, res
)
2108 redef class ACrangeExpr
2111 var e1
= v
.expr
(self.n_expr
)
2112 if e1
== null then return null
2113 var e2
= v
.expr
(self.n_expr2
)
2114 if e2
== null then return null
2115 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2116 var res
= new MutableInstance(mtype
)
2117 v
.init_instance
(res
)
2118 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2123 redef class AOrangeExpr
2126 var e1
= v
.expr
(self.n_expr
)
2127 if e1
== null then return null
2128 var e2
= v
.expr
(self.n_expr2
)
2129 if e2
== null then return null
2130 var mtype
= v
.unanchor_type
(self.mtype
.as(not null))
2131 var res
= new MutableInstance(mtype
)
2132 v
.init_instance
(res
)
2133 v
.callsite
(init_callsite
, [res
, e1
, e2
])
2138 redef class ATrueExpr
2141 return v
.bool_instance
(true)
2145 redef class AFalseExpr
2148 return v
.bool_instance
(false)
2152 redef class ANullExpr
2155 return v
.null_instance
2159 redef class AIsaExpr
2162 var i
= v
.expr
(self.n_expr
)
2163 if i
== null then return null
2164 var mtype
= v
.unanchor_type
(self.cast_type
.as(not null))
2165 return v
.bool_instance
(v
.is_subtype
(i
.mtype
, mtype
))
2169 redef class AAsCastExpr
2172 var i
= v
.expr
(self.n_expr
)
2173 if i
== null then return null
2174 var mtype
= self.mtype
.as(not null)
2175 var amtype
= v
.unanchor_type
(mtype
)
2176 if not v
.is_subtype
(i
.mtype
, amtype
) then
2177 fatal
(v
, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
2183 redef class AAsNotnullExpr
2186 var i
= v
.expr
(self.n_expr
)
2187 if i
== null then return null
2188 if i
.mtype
isa MNullType then
2189 fatal
(v
, "Cast failed")
2195 redef class AParExpr
2198 return v
.expr
(self.n_expr
)
2202 redef class AOnceExpr
2205 if v
.onces
.has_key
(self) then
2206 return v
.onces
[self]
2208 var res
= v
.expr
(self.n_expr
)
2209 if res
== null then return null
2216 redef class ASendExpr
2219 var recv
= v
.expr
(self.n_expr
)
2220 if recv
== null then return null
2221 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2222 if args
== null then return null
2224 var res
= v
.callsite
(callsite
, args
)
2229 redef class ASendReassignFormExpr
2232 var recv
= v
.expr
(self.n_expr
)
2233 if recv
== null then return
2234 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.raw_arguments
)
2235 if args
== null then return
2236 var value
= v
.expr
(self.n_value
)
2237 if value
== null then return
2239 var read
= v
.callsite
(callsite
, args
)
2242 var write
= v
.callsite
(reassign_callsite
, [read
, value
])
2243 assert write
!= null
2247 v
.callsite
(write_callsite
, args
)
2251 redef class ASuperExpr
2254 var recv
= v
.frame
.arguments
.first
2256 var callsite
= self.callsite
2257 if callsite
!= null then
2259 if self.n_args
.n_exprs
.is_empty
then
2260 # Add automatic arguments for the super init call
2262 for i
in [0..callsite
.msignature
.arity
[ do
2263 args
.add
(v
.frame
.arguments
[i
+1])
2266 args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2267 if args
== null then return null
2271 var res
= v
.callsite
(callsite
, args
)
2275 # Standard call-next-method
2276 var mpropdef
= self.mpropdef
2277 mpropdef
= mpropdef
.lookup_next_definition
(v
.mainmodule
, recv
.mtype
)
2280 if self.n_args
.n_exprs
.is_empty
then
2281 args
= v
.frame
.arguments
2283 args
= v
.varargize
(mpropdef
, signaturemap
, recv
, self.n_args
.n_exprs
)
2284 if args
== null then return null
2287 var res
= v
.call
(mpropdef
, args
)
2292 redef class ANewExpr
2295 var mtype
= v
.unanchor_type
(self.recvtype
.as(not null))
2296 var recv
: Instance = new MutableInstance(mtype
)
2297 v
.init_instance
(recv
)
2298 var callsite
= self.callsite
2299 if callsite
== null then return recv
2301 var args
= v
.varargize
(callsite
.mpropdef
, callsite
.signaturemap
, recv
, self.n_args
.n_exprs
)
2302 if args
== null then return null
2303 var res2
= v
.callsite
(callsite
, args
)
2304 if res2
!= null then
2305 #self.debug("got {res2} from {mproperty}. drop {recv}")
2312 redef class AAttrExpr
2315 var recv
= v
.expr
(self.n_expr
)
2316 if recv
== null then return null
2317 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2318 var mproperty
= self.mproperty
.as(not null)
2319 return v
.read_attribute
(mproperty
, recv
)
2323 redef class AAttrAssignExpr
2326 var recv
= v
.expr
(self.n_expr
)
2327 if recv
== null then return
2328 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2329 var i
= v
.expr
(self.n_value
)
2330 if i
== null then return
2331 var mproperty
= self.mproperty
.as(not null)
2332 v
.write_attribute
(mproperty
, recv
, i
)
2336 redef class AAttrReassignExpr
2339 var recv
= v
.expr
(self.n_expr
)
2340 if recv
== null then return
2341 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2342 var value
= v
.expr
(self.n_value
)
2343 if value
== null then return
2344 var mproperty
= self.mproperty
.as(not null)
2345 var attr
= v
.read_attribute
(mproperty
, recv
)
2346 var res
= v
.callsite
(reassign_callsite
, [attr
, value
])
2348 v
.write_attribute
(mproperty
, recv
, res
)
2352 redef class AIssetAttrExpr
2355 var recv
= v
.expr
(self.n_expr
)
2356 if recv
== null then return null
2357 if recv
.mtype
isa MNullType then fatal
(v
, "Receiver is null")
2358 var mproperty
= self.mproperty
.as(not null)
2359 return v
.bool_instance
(v
.isset_attribute
(mproperty
, recv
))
2363 redef class AVarargExpr
2366 return v
.expr
(self.n_expr
)
2370 redef class ANamedargExpr
2373 return v
.expr
(self.n_expr
)
2377 redef class ADebugTypeExpr