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
)
184 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
186 if npropdef
isa AAttrPropdef then
187 if npropdef
.mpropdef
== null then return # Skip broken attribute
188 if npropdef
.noinit
then continue # Skip noinit attribute
189 var atautoinit
= npropdef
.get_single_annotation
("autoinit", self)
190 if atautoinit
!= null then
191 # For autoinit attributes, call the reader to force
192 # the lazy initialization of the attribute.
193 initializers
.add
(npropdef
.mreadpropdef
.mproperty
)
194 npropdef
.mreadpropdef
.mproperty
.is_autoinit
= true
197 if npropdef
.has_value
then continue
198 var paramname
= npropdef
.mpropdef
.mproperty
.name
.substring_from
(1)
199 var ret_type
= npropdef
.mpropdef
.static_mtype
200 if ret_type
== null then return
201 var mparameter
= new MParameter(paramname
, ret_type
, false)
202 mparameters
.add
(mparameter
)
203 var msetter
= npropdef
.mwritepropdef
204 if msetter
== null then
205 # No setter, it is a old-style attribute, so just add it
206 initializers
.add
(npropdef
.mpropdef
.mproperty
)
207 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
209 # Add the setter to the list
210 initializers
.add
(msetter
.mproperty
)
211 msetter
.mproperty
.is_autoinit
= true
216 if the_root_init_mmethod
== null then return
218 # Look for most-specific new-stype init definitions
219 var spropdefs
= the_root_init_mmethod
.lookup_super_definitions
(mclassdef
.mmodule
, mclassdef
.bound_mtype
)
220 if spropdefs
.is_empty
then
221 toolcontext
.error
(nclassdef
.location
, "Error: {mclassdef} does not specialize {the_root_init_mmethod.intro_mclassdef}. Possible duplication of the root class `Object`?")
225 # Look at the autoinit class-annotation
226 var autoinit
= nclassdef
.get_single_annotation
("autoinit", self)
227 if autoinit
!= null then
228 # Just throws the collected initializers
232 # Get and check each argument
233 for narg
in autoinit
.n_args
do
236 error
(narg
, "Syntax error: `autoinit` expects method identifiers.")
240 # Search the property.
241 # To avoid bad surprises, try to get the setter first.
242 var p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
+ "=")
244 p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
)
247 error
(narg
, "Error: unknown method `{id}`")
250 if not p
.is_autoinit
then
251 error
(narg
, "Error: `{p}` is not an autoinit method")
255 # Register the initializer and the parameters
258 if pd
isa MMethodDef then
259 # Get the signature resolved for the current receiver
260 var sig
= pd
.msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mclassdef
.mmodule
, false)
261 mparameters
.add_all sig
.mparameters
268 # Search the longest-one and checks for conflict
269 var longest
= spropdefs
.first
270 if spropdefs
.length
> 1 then
271 # Check for conflict in the order of initializers
272 # Each initializer list must me a prefix of the longest list
273 # part 1. find the longest list
274 for spd
in spropdefs
do
275 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
278 for spd
in spropdefs
do
280 for p
in spd
.initializers
do
281 if p
!= longest
.initializers
[i
] then
282 self.error
(nclassdef
, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
290 # Can we just inherit?
291 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
292 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
293 mclassdef
.mclass
.root_init
= longest
297 # Combine the inherited list to what is collected
298 if longest
.initializers
.length
> 0 then
299 mparameters
.prepend longest
.new_msignature
.mparameters
300 initializers
.prepend longest
.initializers
304 # If we already have a basic init definition, then setup its initializers
305 if defined_init
!= null then
306 defined_init
.initializers
.add_all
(initializers
)
307 var msignature
= new MSignature(mparameters
, null)
308 defined_init
.new_msignature
= msignature
309 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
310 mclassdef
.mclass
.root_init
= defined_init
314 # Else create the local implicit basic init definition
315 var mprop
= the_root_init_mmethod
.as(not null)
316 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
317 mpropdef
.has_supercall
= true
318 mpropdef
.initializers
.add_all
(initializers
)
319 var msignature
= new MSignature(mparameters
, null)
320 mpropdef
.new_msignature
= msignature
321 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
322 nclassdef
.mfree_init
= mpropdef
323 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
324 mclassdef
.mclass
.root_init
= mpropdef
327 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
328 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
330 var mmodule
= mpropdef
.mclassdef
.mmodule
331 var mproperty
= mpropdef
.mproperty
333 # Extract visibility information of the main part of `mtype`
334 # It is a case-by case
335 var vis_type
: nullable MVisibility = null # The own visibility of the type
336 var mmodule_type
: nullable MModule = null # The original module of the type
337 mtype
= mtype
.as_notnullable
338 if mtype
isa MClassType then
339 vis_type
= mtype
.mclass
.visibility
340 mmodule_type
= mtype
.mclass
.intro
.mmodule
341 else if mtype
isa MVirtualType then
342 vis_type
= mtype
.mproperty
.visibility
343 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
344 else if mtype
isa MParameterType then
345 # nothing, always visible
347 node
.debug
"Unexpected type {mtype}"
351 if vis_type
!= null then
352 assert mmodule_type
!= null
353 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
354 if mproperty
.visibility
> vis_type
then
355 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`")
357 else if mproperty
.visibility
> vis_module_type
then
358 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`")
363 # No error, try to go deeper in generic types
364 if node
isa AType then
365 for a
in node
.n_types
do
367 if t
== null then continue # Error, thus skipped
368 check_visibility
(a
, t
, mpropdef
)
370 else if mtype
isa MGenericType then
371 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
377 # Does the MPropDef contains a call to super or a call of a super-constructor?
378 # Subsequent phases of the frontend (esp. typing) set it if required
379 var has_supercall
: Bool = false is writable
382 redef class AClassdef
383 # Marker used in `ModelBuilder::build_properties`
384 private var build_properties_is_done
= false
386 # The free init (implicitely constructed by the class if required)
387 var mfree_init
: nullable MMethodDef = null
391 # The base init of the class.
392 # Used to get the common new_msignature and initializers
394 # TODO: Where to put this information is not clear because unlike other
395 # informations, the initialisers are stable in a same class.
396 var root_init
: nullable MMethodDef = null
399 redef class MClassDef
400 # What is the `APropdef` associated to a `MProperty`?
401 # Used to check multiple definition of a property.
402 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
404 # Build the virtual type `SELF` only for introduction `MClassDef`
405 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
407 if not is_intro
then return
410 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
412 # If SELF type is declared nowherer?
413 if mprop
== null then return
415 # SELF is not a virtual type? it is weird but we ignore it
416 if not mprop
isa MVirtualTypeProp then return
418 # Is this the intro of SELF in the library?
419 var intro
= mprop
.intro
420 var intro_mclassdef
= intro
.mclassdef
421 if intro_mclassdef
== self then
422 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
424 # SELF must be declared in Object, otherwise this will create conflicts
425 if intro_mclassdef
.mclass
.name
!= "Object" then
426 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be declared in Object.")
429 # SELF must be public
430 if mprop
.visibility
!= public_visibility
then
431 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be public.")
434 # SELF must not be fixed
435 if intro
.is_fixed
then
436 modelbuilder
.error
(nintro
, "Error: the virtual type SELF cannot be fixed.")
442 # This class introduction inherits a SELF
443 # We insert an artificial property to update it
444 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
445 mpropdef
.bound
= mclass
.mclass_type
450 # The associated main model entity
451 type MPROPDEF: MPropDef
453 # The associated propdef once build by a `ModelBuilder`
454 var mpropdef
: nullable MPROPDEF is writable
456 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) is abstract
457 private fun build_signature
(modelbuilder
: ModelBuilder) is abstract
458 private fun check_signature
(modelbuilder
: ModelBuilder) is abstract
459 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
461 var mvisibility
= public_visibility
462 if nvisibility
!= null then
463 mvisibility
= nvisibility
.mvisibility
464 if mvisibility
== intrude_visibility
then
465 modelbuilder
.error
(nvisibility
, "Error: intrude is not a legal visibility for properties.")
466 mvisibility
= public_visibility
469 if mclassdef
.mclass
.visibility
== private_visibility
then
470 if mvisibility
== protected_visibility
then
471 assert nvisibility
!= null
472 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
473 else if mvisibility
== private_visibility
then
474 assert nvisibility
!= null
475 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: private is superfluous since the only legal visibility for properties in a private class is private.")
477 mvisibility
= private_visibility
482 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
484 var ndoc
= self.n_doc
486 var mdoc
= ndoc
.to_mdoc
488 mdoc
.original_mentity
= mpropdef
489 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
490 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
493 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
494 if at_deprecated
!= null then
495 if not mpropdef
.is_intro
then
496 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
498 var info
= new MDeprecationInfo
499 ndoc
= at_deprecated
.n_doc
500 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
501 mpropdef
.mproperty
.deprecation
= info
506 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
508 if nvisibility
== null then return
509 var mvisibility
= nvisibility
.mvisibility
510 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
511 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
515 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
517 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
518 modelbuilder
.error
(self, "Error: A property {mprop} is already defined in class {mclassdef.mclass} at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
521 if mprop
isa MMethod and mprop
.is_toplevel
!= (parent
isa ATopClassdef) then
522 if mprop
.is_toplevel
then
523 modelbuilder
.error
(self, "Error: {mprop} is a top level method.")
525 modelbuilder
.error
(self, "Error: {mprop} is not a top level method.")
530 if mprop
isa MMethod and mprop
.is_root_init
then return true
531 if kwredef
== null then
533 modelbuilder
.error
(self, "Redef error: {mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
537 # Check for full-name conflicts in the project.
538 # A public property should have a unique qualified name `project::class::prop`.
539 if mprop
.intro_mclassdef
.mmodule
.mgroup
!= null and mprop
.visibility
>= protected_visibility
then
540 var others
= modelbuilder
.model
.get_mproperties_by_name
(mprop
.name
)
541 if others
!= null then for other
in others
do
542 if other
!= mprop
and other
.intro_mclassdef
.mmodule
.mgroup
!= null and other
.intro_mclassdef
.mmodule
.mgroup
.mproject
== mprop
.intro_mclassdef
.mmodule
.mgroup
.mproject
and other
.intro_mclassdef
.mclass
.name
== mprop
.intro_mclassdef
.mclass
.name
and other
.visibility
>= protected_visibility
then
543 modelbuilder
.advice
(self, "full-name-conflict", "Warning: A property named `{other.full_name}` is already defined in module `{other.intro_mclassdef.mmodule}` for the class `{other.intro_mclassdef.mclass.name}`.")
549 if not need_redef
then
550 modelbuilder
.error
(self, "Error: No property {mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
559 redef class ASignature
560 # Is the model builder has correctly visited the signature
561 var is_visited
= false
562 # Names of parameters from the AST
563 # REQUIRE: is_visited
564 var param_names
= new Array[String]
565 # Types of parameters from the AST
566 # REQUIRE: is_visited
567 var param_types
= new Array[MType]
568 # Rank of the vararg (of -1 if none)
569 # REQUIRE: is_visited
570 var vararg_rank
: Int = -1
572 var ret_type
: nullable MType = null
574 # Visit and fill information about a signature
575 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
577 var mmodule
= mclassdef
.mmodule
578 var param_names
= self.param_names
579 var param_types
= self.param_types
580 for np
in self.n_params
do
581 param_names
.add
(np
.n_id
.text
)
582 var ntype
= np
.n_type
583 if ntype
!= null then
584 var mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
585 if mtype
== null then return false # Skip error
586 for i
in [0..param_names
.length-param_types
.length
[ do
587 param_types
.add
(mtype
)
589 if np
.n_dotdotdot
!= null then
590 if self.vararg_rank
!= -1 then
591 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
594 self.vararg_rank
= param_names
.length
- 1
599 var ntype
= self.n_type
600 if ntype
!= null then
601 self.ret_type
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
602 if self.ret_type
== null then return false # Skip error
605 self.is_visited
= true
609 # Build a visited signature
610 fun build_signature
(modelbuilder
: ModelBuilder): nullable MSignature
612 if param_names
.length
!= param_types
.length
then
613 # Some parameters are typed, other parameters are not typed.
614 modelbuilder
.error
(self.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
618 var mparameters
= new Array[MParameter]
619 for i
in [0..param_names
.length
[ do
620 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
621 self.n_params
[i
].mparameter
= mparameter
622 mparameters
.add
(mparameter
)
625 var msignature
= new MSignature(mparameters
, ret_type
)
631 # The associated mparameter if any
632 var mparameter
: nullable MParameter = null
635 redef class AMethPropdef
636 redef type MPROPDEF: MMethodDef
639 # Can self be used as a root init?
640 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
642 # Need the `init` keyword
643 if n_kwinit
== null then return false
644 # Need to by anonymous
645 if self.n_methid
!= null then return false
646 # No annotation on itself
647 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
649 var amod
= self.parent
.parent
.as(AModule)
650 var amoddecl
= amod
.n_moduledecl
651 if amoddecl
!= null then
652 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
653 if old
!= null then return false
656 if self.n_signature
.n_params
.length
> 0 then
657 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
660 # Cannot be private or something
661 if not self.n_visibility
isa APublicVisibility then
662 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
669 redef fun build_property
(modelbuilder
, mclassdef
)
671 var n_kwinit
= n_kwinit
672 var n_kwnew
= n_kwnew
673 var is_init
= n_kwinit
!= null or n_kwnew
!= null
675 var amethodid
= self.n_methid
677 if amethodid
== null then
681 else if n_kwinit
!= null then
684 else if n_kwnew
!= null then
690 else if amethodid
isa AIdMethid then
691 name
= amethodid
.n_id
.text
692 name_node
= amethodid
694 # operator, bracket or assign
695 name
= amethodid
.collect_text
696 name_node
= amethodid
698 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
703 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
704 var mprop
: nullable MMethod = null
705 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
706 if mprop
== null and look_like_a_root_init
then
707 mprop
= modelbuilder
.the_root_init_mmethod
709 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
710 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
713 if mprop
== null then
714 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
715 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
716 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
717 modelbuilder
.the_root_init_mmethod
= mprop
718 mprop
.is_root_init
= true
720 mprop
.is_init
= is_init
721 mprop
.is_new
= n_kwnew
!= null
722 if parent
isa ATopClassdef then mprop
.is_toplevel
= true
723 self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
)
725 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
726 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
729 # Check name conflicts in the local class for constructors.
731 for p
, n
in mclassdef
.mprop2npropdef
do
732 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
733 check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
)
739 mclassdef
.mprop2npropdef
[mprop
] = self
741 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
743 set_doc
(mpropdef
, modelbuilder
)
745 self.mpropdef
= mpropdef
746 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
747 if mpropdef
.is_intro
then
748 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
750 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
754 redef fun build_signature
(modelbuilder
)
756 var mpropdef
= self.mpropdef
757 if mpropdef
== null then return # Error thus skiped
758 var mclassdef
= mpropdef
.mclassdef
759 var mmodule
= mclassdef
.mmodule
760 var nsig
= self.n_signature
762 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
763 var root_init
= mclassdef
.mclass
.root_init
764 if root_init
!= null then
765 # Inherit the initializers by refinement
766 mpropdef
.new_msignature
= root_init
.new_msignature
767 assert mpropdef
.initializers
.is_empty
768 mpropdef
.initializers
.add_all root_init
.initializers
772 # Retrieve info from the signature AST
773 var param_names
= new Array[String] # Names of parameters from the AST
774 var param_types
= new Array[MType] # Types of parameters from the AST
776 var ret_type
: nullable MType = null # Return type from the AST
778 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
779 param_names
= nsig
.param_names
780 param_types
= nsig
.param_types
781 vararg_rank
= nsig
.vararg_rank
782 ret_type
= nsig
.ret_type
785 # Look for some signature to inherit
786 # FIXME: do not inherit from the intro, but from the most specific
787 var msignature
: nullable MSignature = null
788 if not mpropdef
.is_intro
then
789 msignature
= mpropdef
.mproperty
.intro
.msignature
790 if msignature
== null then return # Skip error
792 # The local signature is adapted to use the local formal types, if any.
793 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
795 # Check inherited signature arity
796 if param_names
.length
!= msignature
.arity
then
798 if nsig
!= null then node
= nsig
else node
= self
799 modelbuilder
.error
(node
, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
802 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
803 # FIXME UGLY: inherit signature from a super-constructor
804 for msupertype
in mclassdef
.supertypes
do
805 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
806 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
807 if candidate
!= null then
808 if msignature
== null then
809 msignature
= candidate
.intro
.as(MMethodDef).msignature
816 # Inherit the signature
817 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
818 # Parameters are untyped, thus inherit them
819 param_types
= new Array[MType]
820 for mparameter
in msignature
.mparameters
do
821 param_types
.add
(mparameter
.mtype
)
823 vararg_rank
= msignature
.vararg_rank
825 if msignature
!= null and ret_type
== null then
826 ret_type
= msignature
.return_mtype
829 if param_names
.length
!= param_types
.length
then
830 # Some parameters are typed, other parameters are not typed.
831 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
835 var mparameters
= new Array[MParameter]
836 for i
in [0..param_names
.length
[ do
837 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
838 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
839 mparameters
.add
(mparameter
)
842 # In `new`-factories, the return type is by default the classtype.
843 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
845 msignature
= new MSignature(mparameters
, ret_type
)
846 mpropdef
.msignature
= msignature
847 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
848 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
849 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
852 redef fun check_signature
(modelbuilder
)
854 var mpropdef
= self.mpropdef
855 if mpropdef
== null then return # Error thus skiped
856 var mclassdef
= mpropdef
.mclassdef
857 var mmodule
= mclassdef
.mmodule
858 var nsig
= self.n_signature
859 var mysignature
= self.mpropdef
.msignature
860 if mysignature
== null then return # Error thus skiped
862 # Lookup for signature in the precursor
863 # FIXME all precursors should be considered
864 if not mpropdef
.is_intro
then
865 var msignature
= mpropdef
.mproperty
.intro
.msignature
866 if msignature
== null then return
868 var precursor_ret_type
= msignature
.return_mtype
869 var ret_type
= mysignature
.return_mtype
870 if ret_type
!= null and precursor_ret_type
== null then
871 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
875 if mysignature
.arity
> 0 then
876 # Check parameters types
877 for i
in [0..mysignature
.arity
[ do
878 var myt
= mysignature
.mparameters
[i
].mtype
879 var prt
= msignature
.mparameters
[i
].mtype
880 var node
= nsig
.n_params
[i
]
881 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
882 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt} as in {mpropdef.mproperty.intro}.")
886 if precursor_ret_type
!= null then
887 var node
: nullable ANode = null
888 if nsig
!= null then node
= nsig
.n_type
889 if node
== null then node
= self
890 if ret_type
== null then
891 # Inherit the return type
892 ret_type
= precursor_ret_type
893 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
894 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type} as in {mpropdef.mproperty.intro}.")
899 if mysignature
.arity
> 0 then
900 # Check parameters visibility
901 for i
in [0..mysignature
.arity
[ do
902 var nt
= nsig
.n_params
[i
].n_type
903 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
906 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
911 redef class AAttrPropdef
912 redef type MPROPDEF: MAttributeDef
914 # Is the node tagged `noinit`?
917 # Is the node tagged lazy?
920 # Has the node a default value?
921 # Could be through `n_expr` or `n_block`
922 var has_value
= false
924 # The guard associated to a lazy attribute.
925 # Because some engines does not have a working `isset`,
926 # this additional attribute is used to guard the lazy initialization.
927 # TODO: to remove once isset is correctly implemented
928 var mlazypropdef
: nullable MAttributeDef
930 # The associated getter (read accessor) if any
931 var mreadpropdef
: nullable MMethodDef is writable
932 # The associated setter (write accessor) if any
933 var mwritepropdef
: nullable MMethodDef is writable
935 redef fun build_property
(modelbuilder
, mclassdef
)
937 var mclass
= mclassdef
.mclass
940 name
= self.n_id2
.text
942 if mclass
.kind
== interface_kind
or mclassdef
.mclass
.kind
== enum_kind
then
943 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
944 else if mclass
.kind
== enum_kind
then
945 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
946 else if mclass
.kind
== extern_kind
then
947 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the extern class {mclass}.")
950 # New attribute style
951 var nid2
= self.n_id2
952 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
953 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
954 self.mpropdef
= mpropdef
955 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
958 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
959 if mreadprop
== null then
960 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
961 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
962 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
963 mreadprop
.deprecation
= mprop
.deprecation
965 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
966 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
968 mclassdef
.mprop2npropdef
[mreadprop
] = self
970 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
971 self.mreadpropdef
= mreadpropdef
972 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
973 set_doc
(mreadpropdef
, modelbuilder
)
974 mpropdef
.mdoc
= mreadpropdef
.mdoc
976 has_value
= n_expr
!= null or n_block
!= null
978 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
979 if atnoinit
!= null then
982 modelbuilder
.error
(atnoinit
, "Error: `noinit` attributes cannot have an initial value")
987 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
988 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
989 if atlazy
!= null or atautoinit
!= null then
990 if atlazy
!= null and atautoinit
!= null then
991 modelbuilder
.error
(atlazy
, "Error: lazy incompatible with autoinit")
994 if not has_value
then
995 if atlazy
!= null then
996 modelbuilder
.error
(atlazy
, "Error: a lazy attribute needs a value")
997 else if atautoinit
!= null then
998 modelbuilder
.error
(atautoinit
, "Error: a autoinit attribute needs a value")
1003 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
1004 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
1005 self.mlazypropdef
= mlazypropdef
1008 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
1009 if atreadonly
!= null then
1010 if not has_value
then
1011 modelbuilder
.error
(atreadonly
, "Error: a readonly attribute needs a value")
1013 # No setter, so just leave
1017 var writename
= name
+ "="
1018 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
1019 if atwritable
!= null then
1020 if not atwritable
.n_args
.is_empty
then
1021 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
1024 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
1025 var nwkwredef
: nullable Token = null
1026 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
1027 if mwriteprop
== null then
1029 if atwritable
!= null then
1030 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
1032 mvisibility
= private_visibility
1034 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1035 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
1036 mwriteprop
.deprecation
= mprop
.deprecation
1038 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
1039 if atwritable
!= null then
1040 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
1043 mclassdef
.mprop2npropdef
[mwriteprop
] = self
1045 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1046 self.mwritepropdef
= mwritepropdef
1047 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1048 mwritepropdef
.mdoc
= mpropdef
.mdoc
1051 redef fun build_signature
(modelbuilder
)
1053 var mpropdef
= self.mpropdef
1054 if mpropdef
== null then return # Error thus skipped
1055 var mclassdef
= mpropdef
.mclassdef
1056 var mmodule
= mclassdef
.mmodule
1057 var mtype
: nullable MType = null
1059 var mreadpropdef
= self.mreadpropdef
1061 var ntype
= self.n_type
1062 if ntype
!= null then
1063 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1064 if mtype
== null then return
1067 var inherited_type
: nullable MType = null
1068 # Inherit the type from the getter (usually an abstract getter)
1069 if mreadpropdef
!= null and not mreadpropdef
.is_intro
then
1070 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1071 if msignature
== null then return # Error, thus skipped
1072 inherited_type
= msignature
.return_mtype
1073 if inherited_type
!= null then
1074 # The inherited type is adapted to use the local formal types, if any.
1075 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1076 if mtype
== null then mtype
= inherited_type
1080 var nexpr
= self.n_expr
1081 if mtype
== null then
1082 if nexpr
!= null then
1083 if nexpr
isa ANewExpr then
1084 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1085 else if nexpr
isa AIntExpr then
1086 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1087 if cla
!= null then mtype
= cla
.mclass_type
1088 else if nexpr
isa AFloatExpr then
1089 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1090 if cla
!= null then mtype
= cla
.mclass_type
1091 else if nexpr
isa ACharExpr then
1092 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1093 if cla
!= null then mtype
= cla
.mclass_type
1094 else if nexpr
isa ABoolExpr then
1095 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1096 if cla
!= null then mtype
= cla
.mclass_type
1097 else if nexpr
isa ASuperstringExpr then
1098 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1099 if cla
!= null then mtype
= cla
.mclass_type
1100 else if nexpr
isa AStringFormExpr then
1101 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1102 if cla
!= null then mtype
= cla
.mclass_type
1104 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
1107 if mtype
== null then return
1109 else if ntype
!= null and inherited_type
== mtype
then
1110 if nexpr
isa ANewExpr then
1111 var xmtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1112 if xmtype
== mtype
then
1113 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1118 if mtype
== null then
1119 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}")
1123 mpropdef
.static_mtype
= mtype
1125 if mreadpropdef
!= null then
1126 var msignature
= new MSignature(new Array[MParameter], mtype
)
1127 mreadpropdef
.msignature
= msignature
1130 var mwritepropdef
= self.mwritepropdef
1131 if mwritepropdef
!= null then
1134 var mparameter
= new MParameter(name
, mtype
, false)
1135 var msignature
= new MSignature([mparameter
], null)
1136 mwritepropdef
.msignature
= msignature
1139 var mlazypropdef
= self.mlazypropdef
1140 if mlazypropdef
!= null then
1141 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1145 redef fun check_signature
(modelbuilder
)
1147 var mpropdef
= self.mpropdef
1148 if mpropdef
== null then return # Error thus skipped
1149 var ntype
= self.n_type
1150 var mtype
= self.mpropdef
.static_mtype
1151 if mtype
== null then return # Error thus skipped
1153 # Lookup for signature in the precursor
1154 # FIXME all precursors should be considered
1155 if not mpropdef
.is_intro
then
1156 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1157 if precursor_type
== null then return
1159 if mtype
!= precursor_type
then
1160 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1165 # Check getter and setter
1166 var meth
= self.mreadpropdef
1167 if meth
!= null then
1168 self.check_method_signature
(modelbuilder
, meth
)
1169 var node
: nullable ANode = ntype
1170 if node
== null then node
= self
1171 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1173 meth
= self.mwritepropdef
1174 if meth
!= null then
1175 self.check_method_signature
(modelbuilder
, meth
)
1176 var node
: nullable ANode = ntype
1177 if node
== null then node
= self
1178 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1182 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1184 var mclassdef
= mpropdef
.mclassdef
1185 var mmodule
= mclassdef
.mmodule
1186 var nsig
= self.n_type
1187 var mysignature
= mpropdef
.msignature
1188 if mysignature
== null then return # Error thus skiped
1190 # Lookup for signature in the precursor
1191 # FIXME all precursors should be considered
1192 if not mpropdef
.is_intro
then
1193 var msignature
= mpropdef
.mproperty
.intro
.msignature
1194 if msignature
== null then return
1196 if mysignature
.arity
!= msignature
.arity
then
1198 if nsig
!= null then node
= nsig
else node
= self
1199 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1202 var precursor_ret_type
= msignature
.return_mtype
1203 var ret_type
= mysignature
.return_mtype
1204 if ret_type
!= null and precursor_ret_type
== null then
1206 if nsig
!= null then node
= nsig
else node
= self
1207 modelbuilder
.error
(node
, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1211 if mysignature
.arity
> 0 then
1212 # Check parameters types
1213 for i
in [0..mysignature
.arity
[ do
1214 var myt
= mysignature
.mparameters
[i
].mtype
1215 var prt
= msignature
.mparameters
[i
].mtype
1217 if nsig
!= null then node
= nsig
else node
= self
1218 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
1219 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
1223 if precursor_ret_type
!= null then
1225 if nsig
!= null then node
= nsig
else node
= self
1226 if ret_type
== null then
1227 # Inherit the return type
1228 ret_type
= precursor_ret_type
1229 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
1230 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1237 redef class ATypePropdef
1238 redef type MPROPDEF: MVirtualTypeDef
1240 redef fun build_property
(modelbuilder
, mclassdef
)
1242 var name
= self.n_id
.text
1243 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1244 if mprop
== null then
1245 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1246 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1247 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1248 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type {name}")
1251 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1253 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1254 assert mprop
isa MVirtualTypeProp
1255 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1257 mclassdef
.mprop2npropdef
[mprop
] = self
1259 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1260 self.mpropdef
= mpropdef
1261 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1262 if mpropdef
.is_intro
then
1263 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1265 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1267 set_doc
(mpropdef
, modelbuilder
)
1269 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1270 if atfixed
!= null then
1271 mpropdef
.is_fixed
= true
1275 redef fun build_signature
(modelbuilder
)
1277 var mpropdef
= self.mpropdef
1278 if mpropdef
== null then return # Error thus skipped
1279 var mclassdef
= mpropdef
.mclassdef
1280 var mmodule
= mclassdef
.mmodule
1281 var mtype
: nullable MType = null
1283 var ntype
= self.n_type
1284 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1285 if mtype
== null then return
1287 mpropdef
.bound
= mtype
1288 # print "{mpropdef}: {mtype}"
1291 redef fun check_signature
(modelbuilder
)
1293 var mpropdef
= self.mpropdef
1294 if mpropdef
== null then return # Error thus skipped
1296 var bound
= self.mpropdef
.bound
1297 if bound
== null then return # Error thus skipped
1299 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1301 var mclassdef
= mpropdef
.mclassdef
1302 var mmodule
= mclassdef
.mmodule
1303 var anchor
= mclassdef
.bound_mtype
1306 if bound
isa MVirtualType then
1307 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1308 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1310 if seen
.has
(bound
) then
1312 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1316 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1317 if not next
isa MVirtualType then break
1322 # Check redefinitions
1323 bound
= mpropdef
.bound
.as(not null)
1324 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1325 var supbound
= p
.bound
1326 if supbound
== null then break # broken super bound, skip error
1328 modelbuilder
.error
(self, "Redef Error: Virtual type {mpropdef.mproperty} is fixed in super-class {p.mclassdef.mclass}")
1331 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1332 # Still a warning to pass existing bad code
1333 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1336 if not modelbuilder
.check_subtype
(n_type
, mmodule
, anchor
, bound
, supbound
) then
1337 modelbuilder
.error
(n_type
, "Redef Error: Wrong bound type. Found {bound}, expected a subtype of {supbound}, as in {p}.")