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 # Analysis and verification of property definitions to instantiate model element
18 module modelize_property
20 intrude import modelize_class
21 private import annotation
23 redef class ToolContext
24 # Run `AClassdef::build_property` on the classdefs of each module
25 var modelize_property_phase
: Phase = new ModelizePropertyPhase(self, [modelize_class_phase
])
28 private class ModelizePropertyPhase
30 redef fun process_nmodule
(nmodule
)
32 for nclassdef
in nmodule
.n_classdefs
do
33 if nclassdef
.all_defs
== null then continue # skip non principal classdef
34 toolcontext
.modelbuilder
.build_properties
(nclassdef
)
39 redef class ModelBuilder
40 # Registration of the npropdef associated to each mpropdef.
42 # Public clients need to use `mpropdef2node` to access stuff.
43 private var mpropdef2npropdef
= new HashMap[MPropDef, APropdef]
45 # Retrieve the associated AST node of a mpropertydef.
46 # This method is used to associate model entity with syntactic entities.
48 # If the property definition is not associated with a node, returns `null`.
49 fun mpropdef2node
(mpropdef
: MPropDef): nullable ANode
52 res
= mpropdef2npropdef
.get_or_null
(mpropdef
)
54 # Run the phases on it
55 toolcontext
.run_phases_on_npropdef
(res
)
58 if mpropdef
isa MMethodDef and mpropdef
.mproperty
.is_root_init
then
59 res
= mclassdef2nclassdef
.get_or_null
(mpropdef
.mclassdef
)
60 if res
!= null then return res
65 # Retrieve all the attributes nodes localy definied
66 # FIXME think more about this method and how the separations separate/global and ast/model should be done.
67 fun collect_attr_propdef
(mclassdef
: MClassDef): Array[AAttrPropdef]
69 var res
= new Array[AAttrPropdef]
70 var n
= mclassdef2nclassdef
.get_or_null
(mclassdef
)
71 if n
== null then return res
72 for npropdef
in n
.n_propdefs
do
73 if npropdef
isa AAttrPropdef then
74 # Run the phases on it
75 toolcontext
.run_phases_on_npropdef
(npropdef
)
82 # Build the properties of `nclassdef`.
83 # REQUIRE: all superclasses are built.
84 private fun build_properties
(nclassdef
: AClassdef)
86 # Force building recursively
87 if nclassdef
.build_properties_is_done
then return
88 nclassdef
.build_properties_is_done
= true
89 var mclassdef
= nclassdef
.mclassdef
.as(not null)
90 if mclassdef
.in_hierarchy
== null then return # Skip error
91 for superclassdef
in mclassdef
.in_hierarchy
.direct_greaters
do
92 if not mclassdef2nclassdef
.has_key
(superclassdef
) then continue
93 build_properties
(mclassdef2nclassdef
[superclassdef
])
96 mclassdef
.build_self_type
(self, nclassdef
)
97 for nclassdef2
in nclassdef
.all_defs
do
98 for npropdef
in nclassdef2
.n_propdefs
do
99 npropdef
.build_property
(self, mclassdef
)
101 for npropdef
in nclassdef2
.n_propdefs
do
102 npropdef
.build_signature
(self)
104 for npropdef
in nclassdef2
.n_propdefs
do
105 npropdef
.check_signature
(self)
108 process_default_constructors
(nclassdef
)
111 # the root init of the Object class
112 # Is usually implicitly defined
113 # Then explicit or implicit definitions of root-init are attached to it
114 var the_root_init_mmethod
: nullable MMethod
116 # Introduce or inherit default constructor
117 # This is the last part of `build_properties`.
118 private fun process_default_constructors
(nclassdef
: AClassdef)
120 var mclassdef
= nclassdef
.mclassdef
.as(not null)
122 # Are we a refinement
123 if not mclassdef
.is_intro
then return
125 # Look for the init in Object, or create it
126 if mclassdef
.mclass
.name
== "Object" and the_root_init_mmethod
== null then
127 # Create the implicit root-init method
128 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
129 mprop
.is_root_init
= true
130 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
131 var mparameters
= new Array[MParameter]
132 var msignature
= new MSignature(mparameters
, null)
133 mpropdef
.msignature
= msignature
134 mpropdef
.new_msignature
= msignature
136 nclassdef
.mfree_init
= mpropdef
137 self.toolcontext
.info
("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
138 the_root_init_mmethod
= mprop
142 # Is the class forbid constructors?
143 if not mclassdef
.mclass
.kind
.need_init
then return
145 # Is there already a constructor defined?
146 var defined_init
: nullable MMethodDef = null
147 for mpropdef
in mclassdef
.mpropdefs
do
148 if not mpropdef
isa MMethodDef then continue
149 if not mpropdef
.mproperty
.is_init
then continue
150 if mpropdef
.mproperty
.is_root_init
then
151 assert defined_init
== null
152 defined_init
= mpropdef
153 else if mpropdef
.mproperty
.name
== "init" then
154 # An explicit old-style init named "init", so return
159 if not nclassdef
isa AStdClassdef then return
161 # Collect undefined attributes
162 var mparameters
= new Array[MParameter]
163 var initializers
= new Array[MProperty]
164 for npropdef
in nclassdef
.n_propdefs
do
165 if npropdef
isa AMethPropdef then
166 if npropdef
.mpropdef
== null then return # Skip broken attribute
167 var at
= npropdef
.get_single_annotation
("autoinit", self)
168 if at
== null then continue # Skip non tagged init
170 var sig
= npropdef
.mpropdef
.msignature
171 if sig
== null then continue # Skip broken method
173 if not npropdef
.mpropdef
.is_intro
then
174 self.error
(at
, "Error: `autoinit` cannot be set on redefinitions")
178 for param
in sig
.mparameters
do
179 var ret_type
= param
.mtype
180 var mparameter
= new MParameter(param
.name
, ret_type
, false)
181 mparameters
.add
(mparameter
)
183 initializers
.add
(npropdef
.mpropdef
.mproperty
)
185 if npropdef
isa AAttrPropdef then
186 if npropdef
.mpropdef
== null then return # Skip broken attribute
187 if npropdef
.noinit
then continue # Skip noinit attribute
188 var atautoinit
= npropdef
.get_single_annotation
("autoinit", self)
189 if atautoinit
!= null then
190 # For autoinit attributes, call the reader to force
191 # the lazy initialization of the attribute.
192 initializers
.add
(npropdef
.mreadpropdef
.mproperty
)
195 if npropdef
.has_value
then continue
196 var paramname
= npropdef
.mpropdef
.mproperty
.name
.substring_from
(1)
197 var ret_type
= npropdef
.mpropdef
.static_mtype
198 if ret_type
== null then return
199 var mparameter
= new MParameter(paramname
, ret_type
, false)
200 mparameters
.add
(mparameter
)
201 var msetter
= npropdef
.mwritepropdef
202 if msetter
== null then
203 # No setter, it is a old-style attribute, so just add it
204 initializers
.add
(npropdef
.mpropdef
.mproperty
)
206 # Add the setter to the list
207 initializers
.add
(msetter
.mproperty
)
212 if the_root_init_mmethod
== null then return
214 # Look for most-specific new-stype init definitions
215 var spropdefs
= the_root_init_mmethod
.lookup_super_definitions
(mclassdef
.mmodule
, mclassdef
.bound_mtype
)
216 if spropdefs
.is_empty
then
217 toolcontext
.error
(nclassdef
.location
, "Error: {mclassdef} does not specialize {the_root_init_mmethod.intro_mclassdef}. Possible duplication of the root class `Object`?")
221 # Search the longest-one and checks for conflict
222 var longest
= spropdefs
.first
223 if spropdefs
.length
> 1 then
224 # Check for conflict in the order of initializers
225 # Each initializer list must me a prefix of the longest list
226 # part 1. find the longest list
227 for spd
in spropdefs
do
228 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
231 for spd
in spropdefs
do
233 for p
in spd
.initializers
do
234 if p
!= longest
.initializers
[i
] then
235 self.error
(nclassdef
, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
243 # Can we just inherit?
244 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
245 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
246 mclassdef
.mclass
.root_init
= longest
250 # Combine the inherited list to what is collected
251 if longest
.initializers
.length
> 0 then
252 mparameters
.prepend longest
.new_msignature
.mparameters
253 initializers
.prepend longest
.initializers
256 # If we already have a basic init definition, then setup its initializers
257 if defined_init
!= null then
258 defined_init
.initializers
.add_all
(initializers
)
259 var msignature
= new MSignature(mparameters
, null)
260 defined_init
.new_msignature
= msignature
261 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
262 mclassdef
.mclass
.root_init
= defined_init
266 # Else create the local implicit basic init definition
267 var mprop
= the_root_init_mmethod
.as(not null)
268 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
269 mpropdef
.has_supercall
= true
270 mpropdef
.initializers
.add_all
(initializers
)
271 var msignature
= new MSignature(mparameters
, null)
272 mpropdef
.new_msignature
= msignature
273 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
274 nclassdef
.mfree_init
= mpropdef
275 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
276 mclassdef
.mclass
.root_init
= mpropdef
279 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
280 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
282 var mmodule
= mpropdef
.mclassdef
.mmodule
283 var mproperty
= mpropdef
.mproperty
285 # Extract visibility information of the main part of `mtype`
286 # It is a case-by case
287 var vis_type
: nullable MVisibility = null # The own visibility of the type
288 var mmodule_type
: nullable MModule = null # The original module of the type
289 mtype
= mtype
.as_notnullable
290 if mtype
isa MClassType then
291 vis_type
= mtype
.mclass
.visibility
292 mmodule_type
= mtype
.mclass
.intro
.mmodule
293 else if mtype
isa MVirtualType then
294 vis_type
= mtype
.mproperty
.visibility
295 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
296 else if mtype
isa MParameterType then
297 # nothing, always visible
299 node
.debug
"Unexpected type {mtype}"
303 if vis_type
!= null then
304 assert mmodule_type
!= null
305 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
306 if mproperty
.visibility
> vis_type
then
307 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`")
309 else if mproperty
.visibility
> vis_module_type
then
310 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`")
315 # No error, try to go deeper in generic types
316 if node
isa AType then
317 for a
in node
.n_types
do
319 if t
== null then continue # Error, thus skipped
320 check_visibility
(a
, t
, mpropdef
)
322 else if mtype
isa MGenericType then
323 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
329 # Does the MPropDef contains a call to super or a call of a super-constructor?
330 # Subsequent phases of the frontend (esp. typing) set it if required
331 var has_supercall
: Bool = false is writable
334 redef class AClassdef
335 # Marker used in `ModelBuilder::build_properties`
336 private var build_properties_is_done
= false
338 # The free init (implicitely constructed by the class if required)
339 var mfree_init
: nullable MMethodDef = null
343 # The base init of the class.
344 # Used to get the common new_msignature and initializers
346 # TODO: Where to put this information is not clear because unlike other
347 # informations, the initialisers are stable in a same class.
348 var root_init
: nullable MMethodDef = null
351 redef class MClassDef
352 # What is the `APropdef` associated to a `MProperty`?
353 # Used to check multiple definition of a property.
354 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
356 # Build the virtual type `SELF` only for introduction `MClassDef`
357 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
359 if not is_intro
then return
362 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
364 # If SELF type is declared nowherer?
365 if mprop
== null then return
367 # SELF is not a virtual type? it is weird but we ignore it
368 if not mprop
isa MVirtualTypeProp then return
370 # Is this the intro of SELF in the library?
371 var intro
= mprop
.intro
372 var intro_mclassdef
= intro
.mclassdef
373 if intro_mclassdef
== self then
374 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
376 # SELF must be declared in Object, otherwise this will create conflicts
377 if intro_mclassdef
.mclass
.name
!= "Object" then
378 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be declared in Object.")
381 # SELF must be public
382 if mprop
.visibility
!= public_visibility
then
383 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be public.")
386 # SELF must not be fixed
387 if intro
.is_fixed
then
388 modelbuilder
.error
(nintro
, "Error: the virtual type SELF cannot be fixed.")
394 # This class introduction inherits a SELF
395 # We insert an artificial property to update it
396 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
397 mpropdef
.bound
= mclass
.mclass_type
402 # The associated main model entity
403 type MPROPDEF: MPropDef
405 # The associated propdef once build by a `ModelBuilder`
406 var mpropdef
: nullable MPROPDEF is writable
408 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) is abstract
409 private fun build_signature
(modelbuilder
: ModelBuilder) is abstract
410 private fun check_signature
(modelbuilder
: ModelBuilder) is abstract
411 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
413 var mvisibility
= public_visibility
414 if nvisibility
!= null then
415 mvisibility
= nvisibility
.mvisibility
416 if mvisibility
== intrude_visibility
then
417 modelbuilder
.error
(nvisibility
, "Error: intrude is not a legal visibility for properties.")
418 mvisibility
= public_visibility
421 if mclassdef
.mclass
.visibility
== private_visibility
then
422 if mvisibility
== protected_visibility
then
423 assert nvisibility
!= null
424 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
425 else if mvisibility
== private_visibility
then
426 assert nvisibility
!= null
427 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: private is superfluous since the only legal visibility for properties in a private class is private.")
429 mvisibility
= private_visibility
434 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
436 var ndoc
= self.n_doc
438 var mdoc
= ndoc
.to_mdoc
440 mdoc
.original_mentity
= mpropdef
441 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
442 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
445 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
446 if at_deprecated
!= null then
447 if not mpropdef
.is_intro
then
448 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
450 var info
= new MDeprecationInfo
451 ndoc
= at_deprecated
.n_doc
452 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
453 mpropdef
.mproperty
.deprecation
= info
458 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
460 if nvisibility
== null then return
461 var mvisibility
= nvisibility
.mvisibility
462 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
463 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
467 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
469 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
470 modelbuilder
.error
(self, "Error: A property {mprop} is already defined in class {mclassdef.mclass} at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
473 if mprop
isa MMethod and mprop
.is_toplevel
!= (parent
isa ATopClassdef) then
474 if mprop
.is_toplevel
then
475 modelbuilder
.error
(self, "Error: {mprop} is a top level method.")
477 modelbuilder
.error
(self, "Error: {mprop} is not a top level method.")
482 if mprop
isa MMethod and mprop
.is_root_init
then return true
483 if kwredef
== null then
485 modelbuilder
.error
(self, "Redef error: {mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
489 if not need_redef
then
490 modelbuilder
.error
(self, "Error: No property {mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
499 redef class ASignature
500 # Is the model builder has correctly visited the signature
501 var is_visited
= false
502 # Names of parameters from the AST
503 # REQUIRE: is_visited
504 var param_names
= new Array[String]
505 # Types of parameters from the AST
506 # REQUIRE: is_visited
507 var param_types
= new Array[MType]
508 # Rank of the vararg (of -1 if none)
509 # REQUIRE: is_visited
510 var vararg_rank
: Int = -1
512 var ret_type
: nullable MType = null
514 # Visit and fill information about a signature
515 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
517 var mmodule
= mclassdef
.mmodule
518 var param_names
= self.param_names
519 var param_types
= self.param_types
520 for np
in self.n_params
do
521 param_names
.add
(np
.n_id
.text
)
522 var ntype
= np
.n_type
523 if ntype
!= null then
524 var mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
525 if mtype
== null then return false # Skip error
526 for i
in [0..param_names
.length-param_types
.length
[ do
527 param_types
.add
(mtype
)
529 if np
.n_dotdotdot
!= null then
530 if self.vararg_rank
!= -1 then
531 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
534 self.vararg_rank
= param_names
.length
- 1
539 var ntype
= self.n_type
540 if ntype
!= null then
541 self.ret_type
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
542 if self.ret_type
== null then return false # Skip error
545 self.is_visited
= true
549 # Build a visited signature
550 fun build_signature
(modelbuilder
: ModelBuilder): nullable MSignature
552 if param_names
.length
!= param_types
.length
then
553 # Some parameters are typed, other parameters are not typed.
554 modelbuilder
.error
(self.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
558 var mparameters
= new Array[MParameter]
559 for i
in [0..param_names
.length
[ do
560 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
561 self.n_params
[i
].mparameter
= mparameter
562 mparameters
.add
(mparameter
)
565 var msignature
= new MSignature(mparameters
, ret_type
)
571 # The associated mparameter if any
572 var mparameter
: nullable MParameter = null
575 redef class AMethPropdef
576 redef type MPROPDEF: MMethodDef
579 # Can self be used as a root init?
580 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
582 # Need the `init` keyword
583 if n_kwinit
== null then return false
584 # Need to by anonymous
585 if self.n_methid
!= null then return false
586 # No annotation on itself
587 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
589 var amod
= self.parent
.parent
.as(AModule)
590 var amoddecl
= amod
.n_moduledecl
591 if amoddecl
!= null then
592 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
593 if old
!= null then return false
596 if self.n_signature
.n_params
.length
> 0 then
597 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
600 # Cannot be private or something
601 if not self.n_visibility
isa APublicVisibility then
602 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
609 redef fun build_property
(modelbuilder
, mclassdef
)
611 var n_kwinit
= n_kwinit
612 var n_kwnew
= n_kwnew
613 var is_init
= n_kwinit
!= null or n_kwnew
!= null
615 var amethodid
= self.n_methid
617 if amethodid
== null then
621 else if n_kwinit
!= null then
624 else if n_kwnew
!= null then
630 else if amethodid
isa AIdMethid then
631 name
= amethodid
.n_id
.text
632 name_node
= amethodid
634 # operator, bracket or assign
635 name
= amethodid
.collect_text
636 name_node
= amethodid
638 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
643 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
644 var mprop
: nullable MMethod = null
645 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
646 if mprop
== null and look_like_a_root_init
then
647 mprop
= modelbuilder
.the_root_init_mmethod
649 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
650 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
653 if mprop
== null then
654 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
655 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
656 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
657 modelbuilder
.the_root_init_mmethod
= mprop
658 mprop
.is_root_init
= true
660 mprop
.is_init
= is_init
661 mprop
.is_new
= n_kwnew
!= null
662 if parent
isa ATopClassdef then mprop
.is_toplevel
= true
663 self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
)
665 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
666 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
669 # Check name conflicts in the local class for constructors.
671 for p
, n
in mclassdef
.mprop2npropdef
do
672 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
673 check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
)
679 mclassdef
.mprop2npropdef
[mprop
] = self
681 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
683 set_doc
(mpropdef
, modelbuilder
)
685 self.mpropdef
= mpropdef
686 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
687 if mpropdef
.is_intro
then
688 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
690 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
694 redef fun build_signature
(modelbuilder
)
696 var mpropdef
= self.mpropdef
697 if mpropdef
== null then return # Error thus skiped
698 var mclassdef
= mpropdef
.mclassdef
699 var mmodule
= mclassdef
.mmodule
700 var nsig
= self.n_signature
702 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
703 var root_init
= mclassdef
.mclass
.root_init
704 if root_init
!= null then
705 # Inherit the initializers by refinement
706 mpropdef
.new_msignature
= root_init
.new_msignature
707 assert mpropdef
.initializers
.is_empty
708 mpropdef
.initializers
.add_all root_init
.initializers
712 # Retrieve info from the signature AST
713 var param_names
= new Array[String] # Names of parameters from the AST
714 var param_types
= new Array[MType] # Types of parameters from the AST
716 var ret_type
: nullable MType = null # Return type from the AST
718 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
719 param_names
= nsig
.param_names
720 param_types
= nsig
.param_types
721 vararg_rank
= nsig
.vararg_rank
722 ret_type
= nsig
.ret_type
725 # Look for some signature to inherit
726 # FIXME: do not inherit from the intro, but from the most specific
727 var msignature
: nullable MSignature = null
728 if not mpropdef
.is_intro
then
729 msignature
= mpropdef
.mproperty
.intro
.msignature
730 if msignature
== null then return # Skip error
732 # The local signature is adapted to use the local formal types, if any.
733 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
735 # Check inherited signature arity
736 if param_names
.length
!= msignature
.arity
then
738 if nsig
!= null then node
= nsig
else node
= self
739 modelbuilder
.error
(node
, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
742 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
743 # FIXME UGLY: inherit signature from a super-constructor
744 for msupertype
in mclassdef
.supertypes
do
745 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
746 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
747 if candidate
!= null then
748 if msignature
== null then
749 msignature
= candidate
.intro
.as(MMethodDef).msignature
756 # Inherit the signature
757 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
758 # Parameters are untyped, thus inherit them
759 param_types
= new Array[MType]
760 for mparameter
in msignature
.mparameters
do
761 param_types
.add
(mparameter
.mtype
)
763 vararg_rank
= msignature
.vararg_rank
765 if msignature
!= null and ret_type
== null then
766 ret_type
= msignature
.return_mtype
769 if param_names
.length
!= param_types
.length
then
770 # Some parameters are typed, other parameters are not typed.
771 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
775 var mparameters
= new Array[MParameter]
776 for i
in [0..param_names
.length
[ do
777 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
778 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
779 mparameters
.add
(mparameter
)
782 # In `new`-factories, the return type is by default the classtype.
783 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
785 msignature
= new MSignature(mparameters
, ret_type
)
786 mpropdef
.msignature
= msignature
787 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
788 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
789 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
792 redef fun check_signature
(modelbuilder
)
794 var mpropdef
= self.mpropdef
795 if mpropdef
== null then return # Error thus skiped
796 var mclassdef
= mpropdef
.mclassdef
797 var mmodule
= mclassdef
.mmodule
798 var nsig
= self.n_signature
799 var mysignature
= self.mpropdef
.msignature
800 if mysignature
== null then return # Error thus skiped
802 # Lookup for signature in the precursor
803 # FIXME all precursors should be considered
804 if not mpropdef
.is_intro
then
805 var msignature
= mpropdef
.mproperty
.intro
.msignature
806 if msignature
== null then return
808 var precursor_ret_type
= msignature
.return_mtype
809 var ret_type
= mysignature
.return_mtype
810 if ret_type
!= null and precursor_ret_type
== null then
811 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
815 if mysignature
.arity
> 0 then
816 # Check parameters types
817 for i
in [0..mysignature
.arity
[ do
818 var myt
= mysignature
.mparameters
[i
].mtype
819 var prt
= msignature
.mparameters
[i
].mtype
820 if not myt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, prt
) or
821 not prt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, myt
) then
822 modelbuilder
.error
(nsig
.n_params
[i
], "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt} as in {mpropdef.mproperty.intro}.")
826 if precursor_ret_type
!= null then
827 if ret_type
== null then
828 # Inherit the return type
829 ret_type
= precursor_ret_type
830 else if not ret_type
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, precursor_ret_type
) then
831 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type} as in {mpropdef.mproperty.intro}.")
836 if mysignature
.arity
> 0 then
837 # Check parameters visibility
838 for i
in [0..mysignature
.arity
[ do
839 var nt
= nsig
.n_params
[i
].n_type
840 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
843 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
848 redef class AAttrPropdef
849 redef type MPROPDEF: MAttributeDef
851 # Is the node tagged `noinit`?
854 # Is the node tagged lazy?
857 # Has the node a default value?
858 # Could be through `n_expr` or `n_block`
859 var has_value
= false
861 # The guard associated to a lazy attribute.
862 # Because some engines does not have a working `isset`,
863 # this additional attribute is used to guard the lazy initialization.
864 # TODO: to remove once isset is correctly implemented
865 var mlazypropdef
: nullable MAttributeDef
867 # The associated getter (read accessor) if any
868 var mreadpropdef
: nullable MMethodDef is writable
869 # The associated setter (write accessor) if any
870 var mwritepropdef
: nullable MMethodDef is writable
872 redef fun build_property
(modelbuilder
, mclassdef
)
874 var mclass
= mclassdef
.mclass
877 name
= self.n_id2
.text
879 if mclass
.kind
== interface_kind
or mclassdef
.mclass
.kind
== enum_kind
then
880 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
881 else if mclass
.kind
== enum_kind
then
882 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
883 else if mclass
.kind
== extern_kind
then
884 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the extern class {mclass}.")
887 # New attribute style
888 var nid2
= self.n_id2
889 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
890 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
891 self.mpropdef
= mpropdef
892 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
895 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
896 if mreadprop
== null then
897 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
898 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
899 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
900 mreadprop
.deprecation
= mprop
.deprecation
902 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
903 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
905 mclassdef
.mprop2npropdef
[mreadprop
] = self
907 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
908 self.mreadpropdef
= mreadpropdef
909 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
910 set_doc
(mreadpropdef
, modelbuilder
)
911 mpropdef
.mdoc
= mreadpropdef
.mdoc
913 has_value
= n_expr
!= null or n_block
!= null
915 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
916 if atnoinit
!= null then
919 modelbuilder
.error
(atnoinit
, "Error: `noinit` attributes cannot have an initial value")
924 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
925 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
926 if atlazy
!= null or atautoinit
!= null then
927 if atlazy
!= null and atautoinit
!= null then
928 modelbuilder
.error
(atlazy
, "Error: lazy incompatible with autoinit")
931 if not has_value
then
932 if atlazy
!= null then
933 modelbuilder
.error
(atlazy
, "Error: a lazy attribute needs a value")
934 else if atautoinit
!= null then
935 modelbuilder
.error
(atautoinit
, "Error: a autoinit attribute needs a value")
940 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
941 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
942 self.mlazypropdef
= mlazypropdef
945 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
946 if atreadonly
!= null then
947 if not has_value
then
948 modelbuilder
.error
(atreadonly
, "Error: a readonly attribute needs a value")
950 # No setter, so just leave
954 var writename
= name
+ "="
955 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
956 if atwritable
!= null then
957 if not atwritable
.n_args
.is_empty
then
958 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
961 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
962 var nwkwredef
: nullable Token = null
963 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
964 if mwriteprop
== null then
966 if atwritable
!= null then
967 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
969 mvisibility
= private_visibility
971 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
972 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
973 mwriteprop
.deprecation
= mprop
.deprecation
975 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
976 if atwritable
!= null then
977 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
980 mclassdef
.mprop2npropdef
[mwriteprop
] = self
982 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
983 self.mwritepropdef
= mwritepropdef
984 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
985 mwritepropdef
.mdoc
= mpropdef
.mdoc
988 redef fun build_signature
(modelbuilder
)
990 var mpropdef
= self.mpropdef
991 if mpropdef
== null then return # Error thus skipped
992 var mclassdef
= mpropdef
.mclassdef
993 var mmodule
= mclassdef
.mmodule
994 var mtype
: nullable MType = null
996 var mreadpropdef
= self.mreadpropdef
998 var ntype
= self.n_type
999 if ntype
!= null then
1000 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1001 if mtype
== null then return
1004 var inherited_type
: nullable MType = null
1005 # Inherit the type from the getter (usually an abstract getter)
1006 if mreadpropdef
!= null and not mreadpropdef
.is_intro
then
1007 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1008 if msignature
== null then return # Error, thus skipped
1009 inherited_type
= msignature
.return_mtype
1010 if inherited_type
!= null then
1011 # The inherited type is adapted to use the local formal types, if any.
1012 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1013 if mtype
== null then mtype
= inherited_type
1017 var nexpr
= self.n_expr
1018 if mtype
== null then
1019 if nexpr
!= null then
1020 if nexpr
isa ANewExpr then
1021 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1022 else if nexpr
isa AIntExpr then
1023 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1024 if cla
!= null then mtype
= cla
.mclass_type
1025 else if nexpr
isa AFloatExpr then
1026 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1027 if cla
!= null then mtype
= cla
.mclass_type
1028 else if nexpr
isa ACharExpr then
1029 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1030 if cla
!= null then mtype
= cla
.mclass_type
1031 else if nexpr
isa ABoolExpr then
1032 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1033 if cla
!= null then mtype
= cla
.mclass_type
1034 else if nexpr
isa ASuperstringExpr then
1035 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1036 if cla
!= null then mtype
= cla
.mclass_type
1037 else if nexpr
isa AStringFormExpr then
1038 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1039 if cla
!= null then mtype
= cla
.mclass_type
1041 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
1044 if mtype
== null then return
1046 else if ntype
!= null and inherited_type
== mtype
then
1047 if nexpr
isa ANewExpr then
1048 var xmtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1049 if xmtype
== mtype
then
1050 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1055 if mtype
== null then
1056 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}")
1060 mpropdef
.static_mtype
= mtype
1062 if mreadpropdef
!= null then
1063 var msignature
= new MSignature(new Array[MParameter], mtype
)
1064 mreadpropdef
.msignature
= msignature
1067 var mwritepropdef
= self.mwritepropdef
1068 if mwritepropdef
!= null then
1071 var mparameter
= new MParameter(name
, mtype
, false)
1072 var msignature
= new MSignature([mparameter
], null)
1073 mwritepropdef
.msignature
= msignature
1076 var mlazypropdef
= self.mlazypropdef
1077 if mlazypropdef
!= null then
1078 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1082 redef fun check_signature
(modelbuilder
)
1084 var mpropdef
= self.mpropdef
1085 if mpropdef
== null then return # Error thus skipped
1086 var ntype
= self.n_type
1087 var mtype
= self.mpropdef
.static_mtype
1088 if mtype
== null then return # Error thus skipped
1090 # Lookup for signature in the precursor
1091 # FIXME all precursors should be considered
1092 if not mpropdef
.is_intro
then
1093 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1094 if precursor_type
== null then return
1096 if mtype
!= precursor_type
then
1097 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1102 # Check getter and setter
1103 var meth
= self.mreadpropdef
1104 if meth
!= null then
1105 self.check_method_signature
(modelbuilder
, meth
)
1106 var node
: nullable ANode = ntype
1107 if node
== null then node
= self
1108 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1110 meth
= self.mwritepropdef
1111 if meth
!= null then
1112 self.check_method_signature
(modelbuilder
, meth
)
1113 var node
: nullable ANode = ntype
1114 if node
== null then node
= self
1115 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1119 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1121 var mclassdef
= mpropdef
.mclassdef
1122 var mmodule
= mclassdef
.mmodule
1123 var nsig
= self.n_type
1124 var mysignature
= mpropdef
.msignature
1125 if mysignature
== null then return # Error thus skiped
1127 # Lookup for signature in the precursor
1128 # FIXME all precursors should be considered
1129 if not mpropdef
.is_intro
then
1130 var msignature
= mpropdef
.mproperty
.intro
.msignature
1131 if msignature
== null then return
1133 if mysignature
.arity
!= msignature
.arity
then
1135 if nsig
!= null then node
= nsig
else node
= self
1136 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1139 var precursor_ret_type
= msignature
.return_mtype
1140 var ret_type
= mysignature
.return_mtype
1141 if ret_type
!= null and precursor_ret_type
== null then
1143 if nsig
!= null then node
= nsig
else node
= self
1144 modelbuilder
.error
(node
, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1148 if mysignature
.arity
> 0 then
1149 # Check parameters types
1150 for i
in [0..mysignature
.arity
[ do
1151 var myt
= mysignature
.mparameters
[i
].mtype
1152 var prt
= msignature
.mparameters
[i
].mtype
1153 if not myt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, prt
) or
1154 not prt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, myt
) then
1156 if nsig
!= null then node
= nsig
else node
= self
1157 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
1161 if precursor_ret_type
!= null then
1162 if ret_type
== null then
1163 # Inherit the return type
1164 ret_type
= precursor_ret_type
1165 else if not ret_type
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, precursor_ret_type
) then
1167 if nsig
!= null then node
= nsig
else node
= self
1168 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1175 redef class ATypePropdef
1176 redef type MPROPDEF: MVirtualTypeDef
1178 redef fun build_property
(modelbuilder
, mclassdef
)
1180 var name
= self.n_id
.text
1181 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1182 if mprop
== null then
1183 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1184 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1185 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1186 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type {name}")
1189 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1191 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1192 assert mprop
isa MVirtualTypeProp
1193 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1195 mclassdef
.mprop2npropdef
[mprop
] = self
1197 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1198 self.mpropdef
= mpropdef
1199 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1200 if mpropdef
.is_intro
then
1201 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1203 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1205 set_doc
(mpropdef
, modelbuilder
)
1207 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1208 if atfixed
!= null then
1209 mpropdef
.is_fixed
= true
1213 redef fun build_signature
(modelbuilder
)
1215 var mpropdef
= self.mpropdef
1216 if mpropdef
== null then return # Error thus skipped
1217 var mclassdef
= mpropdef
.mclassdef
1218 var mmodule
= mclassdef
.mmodule
1219 var mtype
: nullable MType = null
1221 var ntype
= self.n_type
1222 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1223 if mtype
== null then return
1225 mpropdef
.bound
= mtype
1226 # print "{mpropdef}: {mtype}"
1229 redef fun check_signature
(modelbuilder
)
1231 var mpropdef
= self.mpropdef
1232 if mpropdef
== null then return # Error thus skipped
1234 var bound
= self.mpropdef
.bound
1235 if bound
== null then return # Error thus skipped
1237 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1239 var mclassdef
= mpropdef
.mclassdef
1240 var mmodule
= mclassdef
.mmodule
1241 var anchor
= mclassdef
.bound_mtype
1244 if bound
isa MVirtualType then
1245 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1246 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1248 if seen
.has
(bound
) then
1250 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1254 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1255 if not next
isa MVirtualType then break
1260 # Check redefinitions
1261 bound
= mpropdef
.bound
.as(not null)
1262 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1263 var supbound
= p
.bound
1264 if supbound
== null then break # broken super bound, skip error
1266 modelbuilder
.error
(self, "Redef Error: Virtual type {mpropdef.mproperty} is fixed in super-class {p.mclassdef.mclass}")
1269 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1270 # Still a warning to pass existing bad code
1271 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1274 if not bound
.is_subtype
(mmodule
, anchor
, supbound
) then
1275 modelbuilder
.error
(n_type
, "Redef Error: Wrong bound type. Found {bound}, expected a subtype of {supbound}, as in {p}.")