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 var noautoinit
= nclassdef
.get_single_annotation
("noautoinit", self)
228 if autoinit
!= null then
229 # Just throws the collected initializers
233 if noautoinit
!= null then
234 error
(autoinit
, "Error: `autoinit` and `noautoinit` are incompatible.")
237 if autoinit
.n_args
.is_empty
then
238 error
(autoinit
, "Syntax error: `autoinit` expects method identifiers, use `noautoinit` to clear all autoinits.")
241 # Get and check each argument
242 for narg
in autoinit
.n_args
do
245 error
(narg
, "Syntax error: `autoinit` expects method identifiers.")
249 # Search the property.
250 # To avoid bad surprises, try to get the setter first.
251 var p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
+ "=")
253 p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
)
256 error
(narg
, "Error: unknown method `{id}`")
259 if not p
.is_autoinit
then
260 error
(narg
, "Error: `{p}` is not an autoinit method")
264 # Register the initializer and the parameters
267 if pd
isa MMethodDef then
268 # Get the signature resolved for the current receiver
269 var sig
= pd
.msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mclassdef
.mmodule
, false)
270 mparameters
.add_all sig
.mparameters
276 else if noautoinit
!= null then
277 if initializers
.is_empty
then
278 warning
(noautoinit
, "useless-noautoinit", "Warning: the list of autoinit is already empty.")
280 # Just clear initializers
284 # Search the longest-one and checks for conflict
285 var longest
= spropdefs
.first
286 if spropdefs
.length
> 1 then
287 # Check for conflict in the order of initializers
288 # Each initializer list must me a prefix of the longest list
289 # part 1. find the longest list
290 for spd
in spropdefs
do
291 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
294 for spd
in spropdefs
do
296 for p
in spd
.initializers
do
297 if p
!= longest
.initializers
[i
] then
298 self.error
(nclassdef
, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
306 # Can we just inherit?
307 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
308 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
309 mclassdef
.mclass
.root_init
= longest
313 # Combine the inherited list to what is collected
314 if longest
.initializers
.length
> 0 then
315 mparameters
.prepend longest
.new_msignature
.mparameters
316 initializers
.prepend longest
.initializers
320 # If we already have a basic init definition, then setup its initializers
321 if defined_init
!= null then
322 defined_init
.initializers
.add_all
(initializers
)
323 var msignature
= new MSignature(mparameters
, null)
324 defined_init
.new_msignature
= msignature
325 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
326 mclassdef
.mclass
.root_init
= defined_init
330 # Else create the local implicit basic init definition
331 var mprop
= the_root_init_mmethod
.as(not null)
332 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
333 mpropdef
.has_supercall
= true
334 mpropdef
.initializers
.add_all
(initializers
)
335 var msignature
= new MSignature(mparameters
, null)
336 mpropdef
.new_msignature
= msignature
337 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
338 nclassdef
.mfree_init
= mpropdef
339 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
340 mclassdef
.mclass
.root_init
= mpropdef
343 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
344 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
346 var mmodule
= mpropdef
.mclassdef
.mmodule
347 var mproperty
= mpropdef
.mproperty
349 # Extract visibility information of the main part of `mtype`
350 # It is a case-by case
351 var vis_type
: nullable MVisibility = null # The own visibility of the type
352 var mmodule_type
: nullable MModule = null # The original module of the type
353 mtype
= mtype
.as_notnullable
354 if mtype
isa MClassType then
355 vis_type
= mtype
.mclass
.visibility
356 mmodule_type
= mtype
.mclass
.intro
.mmodule
357 else if mtype
isa MVirtualType then
358 vis_type
= mtype
.mproperty
.visibility
359 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
360 else if mtype
isa MParameterType then
361 # nothing, always visible
363 node
.debug
"Unexpected type {mtype}"
367 if vis_type
!= null then
368 assert mmodule_type
!= null
369 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
370 if mproperty
.visibility
> vis_type
then
371 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`")
373 else if mproperty
.visibility
> vis_module_type
then
374 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`")
379 # No error, try to go deeper in generic types
380 if node
isa AType then
381 for a
in node
.n_types
do
383 if t
== null then continue # Error, thus skipped
384 check_visibility
(a
, t
, mpropdef
)
386 else if mtype
isa MGenericType then
387 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
393 # Does the MPropDef contains a call to super or a call of a super-constructor?
394 # Subsequent phases of the frontend (esp. typing) set it if required
395 var has_supercall
: Bool = false is writable
398 redef class AClassdef
399 # Marker used in `ModelBuilder::build_properties`
400 private var build_properties_is_done
= false
402 # The free init (implicitely constructed by the class if required)
403 var mfree_init
: nullable MMethodDef = null
407 # The base init of the class.
408 # Used to get the common new_msignature and initializers
410 # TODO: Where to put this information is not clear because unlike other
411 # informations, the initialisers are stable in a same class.
412 var root_init
: nullable MMethodDef = null
415 redef class MClassDef
416 # What is the `APropdef` associated to a `MProperty`?
417 # Used to check multiple definition of a property.
418 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
420 # Build the virtual type `SELF` only for introduction `MClassDef`
421 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
423 if not is_intro
then return
426 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
428 # If SELF type is declared nowherer?
429 if mprop
== null then return
431 # SELF is not a virtual type? it is weird but we ignore it
432 if not mprop
isa MVirtualTypeProp then return
434 # Is this the intro of SELF in the library?
435 var intro
= mprop
.intro
436 var intro_mclassdef
= intro
.mclassdef
437 if intro_mclassdef
== self then
438 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
440 # SELF must be declared in Object, otherwise this will create conflicts
441 if intro_mclassdef
.mclass
.name
!= "Object" then
442 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be declared in Object.")
445 # SELF must be public
446 if mprop
.visibility
!= public_visibility
then
447 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be public.")
450 # SELF must not be fixed
451 if intro
.is_fixed
then
452 modelbuilder
.error
(nintro
, "Error: the virtual type SELF cannot be fixed.")
458 # This class introduction inherits a SELF
459 # We insert an artificial property to update it
460 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
461 mpropdef
.bound
= mclass
.mclass_type
466 # The associated main model entity
467 type MPROPDEF: MPropDef
469 # The associated propdef once build by a `ModelBuilder`
470 var mpropdef
: nullable MPROPDEF is writable
472 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) is abstract
473 private fun build_signature
(modelbuilder
: ModelBuilder) is abstract
474 private fun check_signature
(modelbuilder
: ModelBuilder) is abstract
475 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
477 var mvisibility
= public_visibility
478 if nvisibility
!= null then
479 mvisibility
= nvisibility
.mvisibility
480 if mvisibility
== intrude_visibility
then
481 modelbuilder
.error
(nvisibility
, "Error: intrude is not a legal visibility for properties.")
482 mvisibility
= public_visibility
485 if mclassdef
.mclass
.visibility
== private_visibility
then
486 if mvisibility
== protected_visibility
then
487 assert nvisibility
!= null
488 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
489 else if mvisibility
== private_visibility
then
490 assert nvisibility
!= null
491 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: private is superfluous since the only legal visibility for properties in a private class is private.")
493 mvisibility
= private_visibility
498 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
500 var ndoc
= self.n_doc
502 var mdoc
= ndoc
.to_mdoc
504 mdoc
.original_mentity
= mpropdef
505 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
506 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
509 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
510 if at_deprecated
!= null then
511 if not mpropdef
.is_intro
then
512 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
514 var info
= new MDeprecationInfo
515 ndoc
= at_deprecated
.n_doc
516 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
517 mpropdef
.mproperty
.deprecation
= info
522 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
524 if nvisibility
== null then return
525 var mvisibility
= nvisibility
.mvisibility
526 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
527 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
531 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
533 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
534 modelbuilder
.error
(self, "Error: A property {mprop} is already defined in class {mclassdef.mclass} at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
537 if mprop
isa MMethod and mprop
.is_toplevel
!= (parent
isa ATopClassdef) then
538 if mprop
.is_toplevel
then
539 modelbuilder
.error
(self, "Error: {mprop} is a top level method.")
541 modelbuilder
.error
(self, "Error: {mprop} is not a top level method.")
546 if mprop
isa MMethod and mprop
.is_root_init
then return true
547 if kwredef
== null then
549 modelbuilder
.error
(self, "Redef error: {mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
553 # Check for full-name conflicts in the project.
554 # A public property should have a unique qualified name `project::class::prop`.
555 if mprop
.intro_mclassdef
.mmodule
.mgroup
!= null and mprop
.visibility
>= protected_visibility
then
556 var others
= modelbuilder
.model
.get_mproperties_by_name
(mprop
.name
)
557 if others
!= null then for other
in others
do
558 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
559 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}`.")
565 if not need_redef
then
566 modelbuilder
.error
(self, "Error: No property {mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
575 redef class ASignature
576 # Is the model builder has correctly visited the signature
577 var is_visited
= false
578 # Names of parameters from the AST
579 # REQUIRE: is_visited
580 var param_names
= new Array[String]
581 # Types of parameters from the AST
582 # REQUIRE: is_visited
583 var param_types
= new Array[MType]
584 # Rank of the vararg (of -1 if none)
585 # REQUIRE: is_visited
586 var vararg_rank
: Int = -1
588 var ret_type
: nullable MType = null
590 # Visit and fill information about a signature
591 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
593 var mmodule
= mclassdef
.mmodule
594 var param_names
= self.param_names
595 var param_types
= self.param_types
596 for np
in self.n_params
do
597 param_names
.add
(np
.n_id
.text
)
598 var ntype
= np
.n_type
599 if ntype
!= null then
600 var mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
601 if mtype
== null then return false # Skip error
602 for i
in [0..param_names
.length-param_types
.length
[ do
603 param_types
.add
(mtype
)
605 if np
.n_dotdotdot
!= null then
606 if self.vararg_rank
!= -1 then
607 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
610 self.vararg_rank
= param_names
.length
- 1
615 var ntype
= self.n_type
616 if ntype
!= null then
617 self.ret_type
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
618 if self.ret_type
== null then return false # Skip error
621 self.is_visited
= true
625 # Build a visited signature
626 fun build_signature
(modelbuilder
: ModelBuilder): nullable MSignature
628 if param_names
.length
!= param_types
.length
then
629 # Some parameters are typed, other parameters are not typed.
630 modelbuilder
.error
(self.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
634 var mparameters
= new Array[MParameter]
635 for i
in [0..param_names
.length
[ do
636 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
637 self.n_params
[i
].mparameter
= mparameter
638 mparameters
.add
(mparameter
)
641 var msignature
= new MSignature(mparameters
, ret_type
)
647 # The associated mparameter if any
648 var mparameter
: nullable MParameter = null
651 redef class AMethPropdef
652 redef type MPROPDEF: MMethodDef
655 # Can self be used as a root init?
656 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
658 # Need the `init` keyword
659 if n_kwinit
== null then return false
660 # Need to by anonymous
661 if self.n_methid
!= null then return false
662 # No annotation on itself
663 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
665 var amod
= self.parent
.parent
.as(AModule)
666 var amoddecl
= amod
.n_moduledecl
667 if amoddecl
!= null then
668 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
669 if old
!= null then return false
672 if self.n_signature
.n_params
.length
> 0 then
673 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
676 # Cannot be private or something
677 if not self.n_visibility
isa APublicVisibility then
678 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
685 redef fun build_property
(modelbuilder
, mclassdef
)
687 var n_kwinit
= n_kwinit
688 var n_kwnew
= n_kwnew
689 var is_init
= n_kwinit
!= null or n_kwnew
!= null
691 var amethodid
= self.n_methid
693 if amethodid
== null then
697 else if n_kwinit
!= null then
700 else if n_kwnew
!= null then
706 else if amethodid
isa AIdMethid then
707 name
= amethodid
.n_id
.text
708 name_node
= amethodid
710 # operator, bracket or assign
711 name
= amethodid
.collect_text
712 name_node
= amethodid
714 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
719 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
720 var mprop
: nullable MMethod = null
721 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
722 if mprop
== null and look_like_a_root_init
then
723 mprop
= modelbuilder
.the_root_init_mmethod
725 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
726 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
729 if mprop
== null then
730 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
731 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
732 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
733 modelbuilder
.the_root_init_mmethod
= mprop
734 mprop
.is_root_init
= true
736 mprop
.is_init
= is_init
737 mprop
.is_new
= n_kwnew
!= null
738 if parent
isa ATopClassdef then mprop
.is_toplevel
= true
739 self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
)
741 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
742 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
745 # Check name conflicts in the local class for constructors.
747 for p
, n
in mclassdef
.mprop2npropdef
do
748 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
749 check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
)
755 mclassdef
.mprop2npropdef
[mprop
] = self
757 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
759 set_doc
(mpropdef
, modelbuilder
)
761 self.mpropdef
= mpropdef
762 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
763 if mpropdef
.is_intro
then
764 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
766 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
770 redef fun build_signature
(modelbuilder
)
772 var mpropdef
= self.mpropdef
773 if mpropdef
== null then return # Error thus skiped
774 var mclassdef
= mpropdef
.mclassdef
775 var mmodule
= mclassdef
.mmodule
776 var nsig
= self.n_signature
778 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
779 var root_init
= mclassdef
.mclass
.root_init
780 if root_init
!= null then
781 # Inherit the initializers by refinement
782 mpropdef
.new_msignature
= root_init
.new_msignature
783 assert mpropdef
.initializers
.is_empty
784 mpropdef
.initializers
.add_all root_init
.initializers
788 # Retrieve info from the signature AST
789 var param_names
= new Array[String] # Names of parameters from the AST
790 var param_types
= new Array[MType] # Types of parameters from the AST
792 var ret_type
: nullable MType = null # Return type from the AST
794 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
795 param_names
= nsig
.param_names
796 param_types
= nsig
.param_types
797 vararg_rank
= nsig
.vararg_rank
798 ret_type
= nsig
.ret_type
801 # Look for some signature to inherit
802 # FIXME: do not inherit from the intro, but from the most specific
803 var msignature
: nullable MSignature = null
804 if not mpropdef
.is_intro
then
805 msignature
= mpropdef
.mproperty
.intro
.msignature
806 if msignature
== null then return # Skip error
808 # The local signature is adapted to use the local formal types, if any.
809 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
811 # Check inherited signature arity
812 if param_names
.length
!= msignature
.arity
then
814 if nsig
!= null then node
= nsig
else node
= self
815 modelbuilder
.error
(node
, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
818 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
819 # FIXME UGLY: inherit signature from a super-constructor
820 for msupertype
in mclassdef
.supertypes
do
821 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
822 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
823 if candidate
!= null then
824 if msignature
== null then
825 msignature
= candidate
.intro
.as(MMethodDef).msignature
832 # Inherit the signature
833 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
834 # Parameters are untyped, thus inherit them
835 param_types
= new Array[MType]
836 for mparameter
in msignature
.mparameters
do
837 param_types
.add
(mparameter
.mtype
)
839 vararg_rank
= msignature
.vararg_rank
841 if msignature
!= null and ret_type
== null then
842 ret_type
= msignature
.return_mtype
845 if param_names
.length
!= param_types
.length
then
846 # Some parameters are typed, other parameters are not typed.
847 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
851 var mparameters
= new Array[MParameter]
852 for i
in [0..param_names
.length
[ do
853 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
854 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
855 mparameters
.add
(mparameter
)
858 # In `new`-factories, the return type is by default the classtype.
859 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
861 msignature
= new MSignature(mparameters
, ret_type
)
862 mpropdef
.msignature
= msignature
863 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
864 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
865 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
868 redef fun check_signature
(modelbuilder
)
870 var mpropdef
= self.mpropdef
871 if mpropdef
== null then return # Error thus skiped
872 var mclassdef
= mpropdef
.mclassdef
873 var mmodule
= mclassdef
.mmodule
874 var nsig
= self.n_signature
875 var mysignature
= self.mpropdef
.msignature
876 if mysignature
== null then return # Error thus skiped
878 # Lookup for signature in the precursor
879 # FIXME all precursors should be considered
880 if not mpropdef
.is_intro
then
881 var msignature
= mpropdef
.mproperty
.intro
.msignature
882 if msignature
== null then return
884 var precursor_ret_type
= msignature
.return_mtype
885 var ret_type
= mysignature
.return_mtype
886 if ret_type
!= null and precursor_ret_type
== null then
887 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
891 if mysignature
.arity
> 0 then
892 # Check parameters types
893 for i
in [0..mysignature
.arity
[ do
894 var myt
= mysignature
.mparameters
[i
].mtype
895 var prt
= msignature
.mparameters
[i
].mtype
896 var node
= nsig
.n_params
[i
]
897 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
898 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt} as in {mpropdef.mproperty.intro}.")
902 if precursor_ret_type
!= null then
903 var node
: nullable ANode = null
904 if nsig
!= null then node
= nsig
.n_type
905 if node
== null then node
= self
906 if ret_type
== null then
907 # Inherit the return type
908 ret_type
= precursor_ret_type
909 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
910 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type} as in {mpropdef.mproperty.intro}.")
915 if mysignature
.arity
> 0 then
916 # Check parameters visibility
917 for i
in [0..mysignature
.arity
[ do
918 var nt
= nsig
.n_params
[i
].n_type
919 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
922 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
927 redef class AAttrPropdef
928 redef type MPROPDEF: MAttributeDef
930 # Is the node tagged `noinit`?
933 # Is the node tagged lazy?
936 # Has the node a default value?
937 # Could be through `n_expr` or `n_block`
938 var has_value
= false
940 # The guard associated to a lazy attribute.
941 # Because some engines does not have a working `isset`,
942 # this additional attribute is used to guard the lazy initialization.
943 # TODO: to remove once isset is correctly implemented
944 var mlazypropdef
: nullable MAttributeDef
946 # The associated getter (read accessor) if any
947 var mreadpropdef
: nullable MMethodDef is writable
948 # The associated setter (write accessor) if any
949 var mwritepropdef
: nullable MMethodDef is writable
951 redef fun build_property
(modelbuilder
, mclassdef
)
953 var mclass
= mclassdef
.mclass
956 name
= self.n_id2
.text
958 if mclass
.kind
== interface_kind
or mclassdef
.mclass
.kind
== enum_kind
then
959 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
960 else if mclass
.kind
== enum_kind
then
961 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
962 else if mclass
.kind
== extern_kind
then
963 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the extern class {mclass}.")
966 # New attribute style
967 var nid2
= self.n_id2
968 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
969 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
970 self.mpropdef
= mpropdef
971 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
974 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
975 if mreadprop
== null then
976 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
977 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
978 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
979 mreadprop
.deprecation
= mprop
.deprecation
981 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
982 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
984 mclassdef
.mprop2npropdef
[mreadprop
] = self
986 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
987 self.mreadpropdef
= mreadpropdef
988 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
989 set_doc
(mreadpropdef
, modelbuilder
)
990 mpropdef
.mdoc
= mreadpropdef
.mdoc
992 has_value
= n_expr
!= null or n_block
!= null
994 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
995 if atnoinit
== null then atnoinit
= self.get_single_annotation
("noautoinit", modelbuilder
)
996 if atnoinit
!= null then
999 modelbuilder
.error
(atnoinit
, "Error: `noautoinit` attributes cannot have an initial value")
1004 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
1005 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
1006 if atlazy
!= null or atautoinit
!= null then
1007 if atlazy
!= null and atautoinit
!= null then
1008 modelbuilder
.error
(atlazy
, "Error: lazy incompatible with autoinit")
1011 if not has_value
then
1012 if atlazy
!= null then
1013 modelbuilder
.error
(atlazy
, "Error: a lazy attribute needs a value")
1014 else if atautoinit
!= null then
1015 modelbuilder
.error
(atautoinit
, "Error: a autoinit attribute needs a value")
1020 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
1021 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
1022 self.mlazypropdef
= mlazypropdef
1025 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
1026 if atreadonly
!= null then
1027 if not has_value
then
1028 modelbuilder
.error
(atreadonly
, "Error: a readonly attribute needs a value")
1030 # No setter, so just leave
1034 var writename
= name
+ "="
1035 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
1036 if atwritable
!= null then
1037 if not atwritable
.n_args
.is_empty
then
1038 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
1041 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
1042 var nwkwredef
: nullable Token = null
1043 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
1044 if mwriteprop
== null then
1046 if atwritable
!= null then
1047 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
1049 mvisibility
= private_visibility
1051 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1052 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
1053 mwriteprop
.deprecation
= mprop
.deprecation
1055 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
1056 if atwritable
!= null then
1057 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
1060 mclassdef
.mprop2npropdef
[mwriteprop
] = self
1062 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1063 self.mwritepropdef
= mwritepropdef
1064 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1065 mwritepropdef
.mdoc
= mpropdef
.mdoc
1068 redef fun build_signature
(modelbuilder
)
1070 var mpropdef
= self.mpropdef
1071 if mpropdef
== null then return # Error thus skipped
1072 var mclassdef
= mpropdef
.mclassdef
1073 var mmodule
= mclassdef
.mmodule
1074 var mtype
: nullable MType = null
1076 var mreadpropdef
= self.mreadpropdef
1078 var ntype
= self.n_type
1079 if ntype
!= null then
1080 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1081 if mtype
== null then return
1084 var inherited_type
: nullable MType = null
1085 # Inherit the type from the getter (usually an abstract getter)
1086 if mreadpropdef
!= null and not mreadpropdef
.is_intro
then
1087 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1088 if msignature
== null then return # Error, thus skipped
1089 inherited_type
= msignature
.return_mtype
1090 if inherited_type
!= null then
1091 # The inherited type is adapted to use the local formal types, if any.
1092 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1093 if mtype
== null then mtype
= inherited_type
1097 var nexpr
= self.n_expr
1098 if mtype
== null then
1099 if nexpr
!= null then
1100 if nexpr
isa ANewExpr then
1101 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1102 else if nexpr
isa AIntExpr then
1103 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1104 if cla
!= null then mtype
= cla
.mclass_type
1105 else if nexpr
isa AFloatExpr then
1106 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1107 if cla
!= null then mtype
= cla
.mclass_type
1108 else if nexpr
isa ACharExpr then
1109 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1110 if cla
!= null then mtype
= cla
.mclass_type
1111 else if nexpr
isa ABoolExpr then
1112 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1113 if cla
!= null then mtype
= cla
.mclass_type
1114 else if nexpr
isa ASuperstringExpr then
1115 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1116 if cla
!= null then mtype
= cla
.mclass_type
1117 else if nexpr
isa AStringFormExpr then
1118 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1119 if cla
!= null then mtype
= cla
.mclass_type
1121 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
1124 if mtype
== null then return
1126 else if ntype
!= null and inherited_type
== mtype
then
1127 if nexpr
isa ANewExpr then
1128 var xmtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1129 if xmtype
== mtype
then
1130 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1135 if mtype
== null then
1136 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}")
1140 mpropdef
.static_mtype
= mtype
1142 if mreadpropdef
!= null then
1143 var msignature
= new MSignature(new Array[MParameter], mtype
)
1144 mreadpropdef
.msignature
= msignature
1147 var mwritepropdef
= self.mwritepropdef
1148 if mwritepropdef
!= null then
1151 var mparameter
= new MParameter(name
, mtype
, false)
1152 var msignature
= new MSignature([mparameter
], null)
1153 mwritepropdef
.msignature
= msignature
1156 var mlazypropdef
= self.mlazypropdef
1157 if mlazypropdef
!= null then
1158 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1162 redef fun check_signature
(modelbuilder
)
1164 var mpropdef
= self.mpropdef
1165 if mpropdef
== null then return # Error thus skipped
1166 var ntype
= self.n_type
1167 var mtype
= self.mpropdef
.static_mtype
1168 if mtype
== null then return # Error thus skipped
1170 # Lookup for signature in the precursor
1171 # FIXME all precursors should be considered
1172 if not mpropdef
.is_intro
then
1173 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1174 if precursor_type
== null then return
1176 if mtype
!= precursor_type
then
1177 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1182 # Check getter and setter
1183 var meth
= self.mreadpropdef
1184 if meth
!= null then
1185 self.check_method_signature
(modelbuilder
, meth
)
1186 var node
: nullable ANode = ntype
1187 if node
== null then node
= self
1188 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1190 meth
= self.mwritepropdef
1191 if meth
!= null then
1192 self.check_method_signature
(modelbuilder
, meth
)
1193 var node
: nullable ANode = ntype
1194 if node
== null then node
= self
1195 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1199 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1201 var mclassdef
= mpropdef
.mclassdef
1202 var mmodule
= mclassdef
.mmodule
1203 var nsig
= self.n_type
1204 var mysignature
= mpropdef
.msignature
1205 if mysignature
== null then return # Error thus skiped
1207 # Lookup for signature in the precursor
1208 # FIXME all precursors should be considered
1209 if not mpropdef
.is_intro
then
1210 var msignature
= mpropdef
.mproperty
.intro
.msignature
1211 if msignature
== null then return
1213 if mysignature
.arity
!= msignature
.arity
then
1215 if nsig
!= null then node
= nsig
else node
= self
1216 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1219 var precursor_ret_type
= msignature
.return_mtype
1220 var ret_type
= mysignature
.return_mtype
1221 if ret_type
!= null and precursor_ret_type
== null then
1223 if nsig
!= null then node
= nsig
else node
= self
1224 modelbuilder
.error
(node
, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1228 if mysignature
.arity
> 0 then
1229 # Check parameters types
1230 for i
in [0..mysignature
.arity
[ do
1231 var myt
= mysignature
.mparameters
[i
].mtype
1232 var prt
= msignature
.mparameters
[i
].mtype
1234 if nsig
!= null then node
= nsig
else node
= self
1235 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
1236 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
1240 if precursor_ret_type
!= null then
1242 if nsig
!= null then node
= nsig
else node
= self
1243 if ret_type
== null then
1244 # Inherit the return type
1245 ret_type
= precursor_ret_type
1246 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
1247 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1254 redef class ATypePropdef
1255 redef type MPROPDEF: MVirtualTypeDef
1257 redef fun build_property
(modelbuilder
, mclassdef
)
1259 var name
= self.n_id
.text
1260 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1261 if mprop
== null then
1262 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1263 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1264 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1265 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type {name}")
1268 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1270 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1271 assert mprop
isa MVirtualTypeProp
1272 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1274 mclassdef
.mprop2npropdef
[mprop
] = self
1276 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1277 self.mpropdef
= mpropdef
1278 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1279 if mpropdef
.is_intro
then
1280 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1282 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1284 set_doc
(mpropdef
, modelbuilder
)
1286 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1287 if atfixed
!= null then
1288 mpropdef
.is_fixed
= true
1292 redef fun build_signature
(modelbuilder
)
1294 var mpropdef
= self.mpropdef
1295 if mpropdef
== null then return # Error thus skipped
1296 var mclassdef
= mpropdef
.mclassdef
1297 var mmodule
= mclassdef
.mmodule
1298 var mtype
: nullable MType = null
1300 var ntype
= self.n_type
1301 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1302 if mtype
== null then return
1304 mpropdef
.bound
= mtype
1305 # print "{mpropdef}: {mtype}"
1308 redef fun check_signature
(modelbuilder
)
1310 var mpropdef
= self.mpropdef
1311 if mpropdef
== null then return # Error thus skipped
1313 var bound
= self.mpropdef
.bound
1314 if bound
== null then return # Error thus skipped
1316 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1318 var mclassdef
= mpropdef
.mclassdef
1319 var mmodule
= mclassdef
.mmodule
1320 var anchor
= mclassdef
.bound_mtype
1323 if bound
isa MVirtualType then
1324 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1325 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1327 if seen
.has
(bound
) then
1329 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1333 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1334 if not next
isa MVirtualType then break
1339 # Check redefinitions
1340 bound
= mpropdef
.bound
.as(not null)
1341 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1342 var supbound
= p
.bound
1343 if supbound
== null then break # broken super bound, skip error
1345 modelbuilder
.error
(self, "Redef Error: Virtual type {mpropdef.mproperty} is fixed in super-class {p.mclassdef.mclass}")
1348 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1349 # Still a warning to pass existing bad code
1350 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1353 if not modelbuilder
.check_subtype
(n_type
, mmodule
, anchor
, bound
, supbound
) then
1354 modelbuilder
.error
(n_type
, "Redef Error: Wrong bound type. Found {bound}, expected a subtype of {supbound}, as in {p}.")