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
90 if mclassdef
== null then return # skip error
91 if mclassdef
.in_hierarchy
== null then return # Skip error
92 for superclassdef
in mclassdef
.in_hierarchy
.direct_greaters
do
93 if not mclassdef2nclassdef
.has_key
(superclassdef
) then continue
94 build_properties
(mclassdef2nclassdef
[superclassdef
])
97 mclassdef
.build_self_type
(self, nclassdef
)
98 for nclassdef2
in nclassdef
.all_defs
do
99 for npropdef
in nclassdef2
.n_propdefs
do
100 npropdef
.build_property
(self, mclassdef
)
102 for npropdef
in nclassdef2
.n_propdefs
do
103 npropdef
.build_signature
(self)
105 for npropdef
in nclassdef2
.n_propdefs
do
106 npropdef
.check_signature
(self)
109 process_default_constructors
(nclassdef
)
112 # the root init of the Object class
113 # Is usually implicitly defined
114 # Then explicit or implicit definitions of root-init are attached to it
115 var the_root_init_mmethod
: nullable MMethod
117 # Introduce or inherit default constructor
118 # This is the last part of `build_properties`.
119 private fun process_default_constructors
(nclassdef
: AClassdef)
121 var mclassdef
= nclassdef
.mclassdef
.as(not null)
123 # Are we a refinement
124 if not mclassdef
.is_intro
then return
126 # Look for the init in Object, or create it
127 if mclassdef
.mclass
.name
== "Object" and the_root_init_mmethod
== null then
128 # Create the implicit root-init method
129 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
130 mprop
.is_root_init
= true
131 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
132 var mparameters
= new Array[MParameter]
133 var msignature
= new MSignature(mparameters
, null)
134 mpropdef
.msignature
= msignature
135 mpropdef
.new_msignature
= msignature
137 nclassdef
.mfree_init
= mpropdef
138 self.toolcontext
.info
("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
139 the_root_init_mmethod
= mprop
143 # Is the class forbid constructors?
144 if not mclassdef
.mclass
.kind
.need_init
then return
146 # Is there already a constructor defined?
147 var defined_init
: nullable MMethodDef = null
148 for mpropdef
in mclassdef
.mpropdefs
do
149 if not mpropdef
isa MMethodDef then continue
150 if not mpropdef
.mproperty
.is_init
then continue
151 if mpropdef
.mproperty
.is_root_init
then
152 assert defined_init
== null
153 defined_init
= mpropdef
154 else if mpropdef
.mproperty
.name
== "init" then
155 # An explicit old-style init named "init", so return
160 if not nclassdef
isa AStdClassdef then return
162 # Collect undefined attributes
163 var mparameters
= new Array[MParameter]
164 var initializers
= new Array[MProperty]
165 for npropdef
in nclassdef
.n_propdefs
do
166 if npropdef
isa AMethPropdef then
167 if npropdef
.mpropdef
== null then return # Skip broken attribute
168 var at
= npropdef
.get_single_annotation
("autoinit", self)
169 if at
== null then continue # Skip non tagged init
171 var sig
= npropdef
.mpropdef
.msignature
172 if sig
== null then continue # Skip broken method
174 if not npropdef
.mpropdef
.is_intro
then
175 self.error
(at
, "Error: `autoinit` cannot be set on redefinitions")
179 for param
in sig
.mparameters
do
180 var ret_type
= param
.mtype
181 var mparameter
= new MParameter(param
.name
, ret_type
, false)
182 mparameters
.add
(mparameter
)
184 initializers
.add
(npropdef
.mpropdef
.mproperty
)
185 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
187 if npropdef
isa AAttrPropdef then
188 if npropdef
.mpropdef
== null then return # Skip broken attribute
189 if npropdef
.noinit
then continue # Skip noinit attribute
190 var atautoinit
= npropdef
.get_single_annotation
("autoinit", self)
191 if atautoinit
!= null then
192 # For autoinit attributes, call the reader to force
193 # the lazy initialization of the attribute.
194 initializers
.add
(npropdef
.mreadpropdef
.mproperty
)
195 npropdef
.mreadpropdef
.mproperty
.is_autoinit
= true
198 if npropdef
.has_value
then continue
199 var paramname
= npropdef
.mpropdef
.mproperty
.name
.substring_from
(1)
200 var ret_type
= npropdef
.mpropdef
.static_mtype
201 if ret_type
== null then return
202 var mparameter
= new MParameter(paramname
, ret_type
, false)
203 mparameters
.add
(mparameter
)
204 var msetter
= npropdef
.mwritepropdef
205 if msetter
== null then
206 # No setter, it is a old-style attribute, so just add it
207 initializers
.add
(npropdef
.mpropdef
.mproperty
)
208 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
210 # Add the setter to the list
211 initializers
.add
(msetter
.mproperty
)
212 msetter
.mproperty
.is_autoinit
= true
217 if the_root_init_mmethod
== null then return
219 # Look for most-specific new-stype init definitions
220 var spropdefs
= the_root_init_mmethod
.lookup_super_definitions
(mclassdef
.mmodule
, mclassdef
.bound_mtype
)
221 if spropdefs
.is_empty
then
222 toolcontext
.error
(nclassdef
.location
, "Error: {mclassdef} does not specialize {the_root_init_mmethod.intro_mclassdef}. Possible duplication of the root class `Object`?")
226 # Look at the autoinit class-annotation
227 var autoinit
= nclassdef
.get_single_annotation
("autoinit", self)
228 var noautoinit
= nclassdef
.get_single_annotation
("noautoinit", self)
229 if autoinit
!= null then
230 # Just throws the collected initializers
234 if noautoinit
!= null then
235 error
(autoinit
, "Error: `autoinit` and `noautoinit` are incompatible.")
238 if autoinit
.n_args
.is_empty
then
239 error
(autoinit
, "Syntax error: `autoinit` expects method identifiers, use `noautoinit` to clear all autoinits.")
242 # Get and check each argument
243 for narg
in autoinit
.n_args
do
246 error
(narg
, "Syntax error: `autoinit` expects method identifiers.")
250 # Search the property.
251 # To avoid bad surprises, try to get the setter first.
252 var p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
+ "=")
254 p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
)
257 error
(narg
, "Error: unknown method `{id}`")
260 if not p
.is_autoinit
then
261 error
(narg
, "Error: `{p}` is not an autoinit method")
265 # Register the initializer and the parameters
268 if pd
isa MMethodDef then
269 # Get the signature resolved for the current receiver
270 var sig
= pd
.msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mclassdef
.mmodule
, false)
271 mparameters
.add_all sig
.mparameters
277 else if noautoinit
!= null then
278 if initializers
.is_empty
then
279 warning
(noautoinit
, "useless-noautoinit", "Warning: the list of autoinit is already empty.")
281 # Just clear initializers
285 # Search the longest-one and checks for conflict
286 var longest
= spropdefs
.first
287 if spropdefs
.length
> 1 then
288 # Check for conflict in the order of initializers
289 # Each initializer list must me a prefix of the longest list
290 # part 1. find the longest list
291 for spd
in spropdefs
do
292 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
295 for spd
in spropdefs
do
297 for p
in spd
.initializers
do
298 if p
!= longest
.initializers
[i
] then
299 self.error
(nclassdef
, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
300 # TODO: invalidate the initializer to avoid more errors
308 # Can we just inherit?
309 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
310 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
311 mclassdef
.mclass
.root_init
= longest
315 # Combine the inherited list to what is collected
316 if longest
.initializers
.length
> 0 then
317 mparameters
.prepend longest
.new_msignature
.mparameters
318 initializers
.prepend longest
.initializers
322 # If we already have a basic init definition, then setup its initializers
323 if defined_init
!= null then
324 defined_init
.initializers
.add_all
(initializers
)
325 var msignature
= new MSignature(mparameters
, null)
326 defined_init
.new_msignature
= msignature
327 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
328 mclassdef
.mclass
.root_init
= defined_init
332 # Else create the local implicit basic init definition
333 var mprop
= the_root_init_mmethod
.as(not null)
334 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
335 mpropdef
.has_supercall
= true
336 mpropdef
.initializers
.add_all
(initializers
)
337 var msignature
= new MSignature(mparameters
, null)
338 mpropdef
.new_msignature
= msignature
339 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
340 nclassdef
.mfree_init
= mpropdef
341 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
342 mclassdef
.mclass
.root_init
= mpropdef
345 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
346 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
348 var mmodule
= mpropdef
.mclassdef
.mmodule
349 var mproperty
= mpropdef
.mproperty
351 # Extract visibility information of the main part of `mtype`
352 # It is a case-by case
353 var vis_type
: nullable MVisibility = null # The own visibility of the type
354 var mmodule_type
: nullable MModule = null # The original module of the type
355 mtype
= mtype
.as_notnullable
356 if mtype
isa MClassType then
357 vis_type
= mtype
.mclass
.visibility
358 mmodule_type
= mtype
.mclass
.intro
.mmodule
359 else if mtype
isa MVirtualType then
360 vis_type
= mtype
.mproperty
.visibility
361 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
362 else if mtype
isa MParameterType then
363 # nothing, always visible
365 node
.debug
"Unexpected type {mtype}"
369 if vis_type
!= null then
370 assert mmodule_type
!= null
371 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
372 if mproperty
.visibility
> vis_type
then
373 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`")
375 else if mproperty
.visibility
> vis_module_type
then
376 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`")
381 # No error, try to go deeper in generic types
382 if node
isa AType then
383 for a
in node
.n_types
do
385 if t
== null then continue # Error, thus skipped
386 check_visibility
(a
, t
, mpropdef
)
388 else if mtype
isa MGenericType then
389 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
395 # Does the MPropDef contains a call to super or a call of a super-constructor?
396 # Subsequent phases of the frontend (esp. typing) set it if required
397 var has_supercall
: Bool = false is writable
400 redef class AClassdef
401 # Marker used in `ModelBuilder::build_properties`
402 private var build_properties_is_done
= false
404 # The free init (implicitely constructed by the class if required)
405 var mfree_init
: nullable MMethodDef = null
409 # The base init of the class.
410 # Used to get the common new_msignature and initializers
412 # TODO: Where to put this information is not clear because unlike other
413 # informations, the initialisers are stable in a same class.
414 var root_init
: nullable MMethodDef = null
417 redef class MClassDef
418 # What is the `APropdef` associated to a `MProperty`?
419 # Used to check multiple definition of a property.
420 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
422 # Build the virtual type `SELF` only for introduction `MClassDef`
423 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
425 if not is_intro
then return
428 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
430 # If SELF type is declared nowherer?
431 if mprop
== null then return
433 # SELF is not a virtual type? it is weird but we ignore it
434 if not mprop
isa MVirtualTypeProp then return
436 # Is this the intro of SELF in the library?
437 var intro
= mprop
.intro
438 var intro_mclassdef
= intro
.mclassdef
439 if intro_mclassdef
== self then
440 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
442 # SELF must be declared in Object, otherwise this will create conflicts
443 if intro_mclassdef
.mclass
.name
!= "Object" then
444 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be declared in Object.")
447 # SELF must be public
448 if mprop
.visibility
!= public_visibility
then
449 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be public.")
452 # SELF must not be fixed
453 if intro
.is_fixed
then
454 modelbuilder
.error
(nintro
, "Error: the virtual type SELF cannot be fixed.")
460 # This class introduction inherits a SELF
461 # We insert an artificial property to update it
462 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
463 mpropdef
.bound
= mclass
.mclass_type
468 # The associated main model entity
469 type MPROPDEF: MPropDef
471 # The associated propdef once build by a `ModelBuilder`
472 var mpropdef
: nullable MPROPDEF is writable
474 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) do end
475 private fun build_signature
(modelbuilder
: ModelBuilder) do end
476 private fun check_signature
(modelbuilder
: ModelBuilder) do end
477 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
479 var mvisibility
= public_visibility
480 if nvisibility
!= null then
481 mvisibility
= nvisibility
.mvisibility
482 if mvisibility
== intrude_visibility
then
483 modelbuilder
.error
(nvisibility
, "Error: intrude is not a legal visibility for properties.")
484 mvisibility
= public_visibility
487 if mclassdef
.mclass
.visibility
== private_visibility
then
488 if mvisibility
== protected_visibility
then
489 assert nvisibility
!= null
490 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
491 else if mvisibility
== private_visibility
then
492 assert nvisibility
!= null
493 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: private is superfluous since the only legal visibility for properties in a private class is private.")
495 mvisibility
= private_visibility
500 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
502 var ndoc
= self.n_doc
504 var mdoc
= ndoc
.to_mdoc
506 mdoc
.original_mentity
= mpropdef
507 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
508 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
511 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
512 if at_deprecated
!= null then
513 if not mpropdef
.is_intro
then
514 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
516 var info
= new MDeprecationInfo
517 ndoc
= at_deprecated
.n_doc
518 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
519 mpropdef
.mproperty
.deprecation
= info
524 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
526 if nvisibility
== null then return
527 var mvisibility
= nvisibility
.mvisibility
528 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
529 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
533 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
535 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
536 modelbuilder
.error
(self, "Error: A property {mprop} is already defined in class {mclassdef.mclass} at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
539 if mprop
isa MMethod and mprop
.is_toplevel
!= (parent
isa ATopClassdef) then
540 if mprop
.is_toplevel
then
541 modelbuilder
.error
(self, "Error: {mprop} is a top level method.")
543 modelbuilder
.error
(self, "Error: {mprop} is not a top level method.")
548 if mprop
isa MMethod and mprop
.is_root_init
then return true
549 if kwredef
== null then
551 modelbuilder
.error
(self, "Redef error: {mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
555 # Check for full-name conflicts in the project.
556 # A public property should have a unique qualified name `project::class::prop`.
557 if mprop
.intro_mclassdef
.mmodule
.mgroup
!= null and mprop
.visibility
>= protected_visibility
then
558 var others
= modelbuilder
.model
.get_mproperties_by_name
(mprop
.name
)
559 if others
!= null then for other
in others
do
560 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
561 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}`.")
567 if not need_redef
then
568 modelbuilder
.error
(self, "Error: No property {mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
577 redef class ASignature
578 # Is the model builder has correctly visited the signature
579 var is_visited
= false
580 # Names of parameters from the AST
581 # REQUIRE: is_visited
582 var param_names
= new Array[String]
583 # Types of parameters from the AST
584 # REQUIRE: is_visited
585 var param_types
= new Array[MType]
586 # Rank of the vararg (of -1 if none)
587 # REQUIRE: is_visited
588 var vararg_rank
: Int = -1
590 var ret_type
: nullable MType = null
592 # Visit and fill information about a signature
593 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
595 var mmodule
= mclassdef
.mmodule
596 var param_names
= self.param_names
597 var param_types
= self.param_types
598 for np
in self.n_params
do
599 param_names
.add
(np
.n_id
.text
)
600 var ntype
= np
.n_type
601 if ntype
!= null then
602 var mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
603 if mtype
== null then return false # Skip error
604 for i
in [0..param_names
.length-param_types
.length
[ do
605 param_types
.add
(mtype
)
607 if np
.n_dotdotdot
!= null then
608 if self.vararg_rank
!= -1 then
609 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
612 self.vararg_rank
= param_names
.length
- 1
617 var ntype
= self.n_type
618 if ntype
!= null then
619 self.ret_type
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
620 if self.ret_type
== null then return false # Skip error
623 self.is_visited
= true
627 # Build a visited signature
628 fun build_signature
(modelbuilder
: ModelBuilder): nullable MSignature
630 if param_names
.length
!= param_types
.length
then
631 # Some parameters are typed, other parameters are not typed.
632 modelbuilder
.error
(self.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
636 var mparameters
= new Array[MParameter]
637 for i
in [0..param_names
.length
[ do
638 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
639 self.n_params
[i
].mparameter
= mparameter
640 mparameters
.add
(mparameter
)
643 var msignature
= new MSignature(mparameters
, ret_type
)
649 # The associated mparameter if any
650 var mparameter
: nullable MParameter = null
653 redef class AMethPropdef
654 redef type MPROPDEF: MMethodDef
657 # Can self be used as a root init?
658 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
660 # Need the `init` keyword
661 if n_kwinit
== null then return false
662 # Need to by anonymous
663 if self.n_methid
!= null then return false
664 # No annotation on itself
665 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
667 var amod
= self.parent
.parent
.as(AModule)
668 var amoddecl
= amod
.n_moduledecl
669 if amoddecl
!= null then
670 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
671 if old
!= null then return false
674 if self.n_signature
.n_params
.length
> 0 then
675 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
678 # Cannot be private or something
679 if not self.n_visibility
isa APublicVisibility then
680 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
687 redef fun build_property
(modelbuilder
, mclassdef
)
689 var n_kwinit
= n_kwinit
690 var n_kwnew
= n_kwnew
691 var is_init
= n_kwinit
!= null or n_kwnew
!= null
693 var amethodid
= self.n_methid
695 if amethodid
== null then
699 else if n_kwinit
!= null then
702 else if n_kwnew
!= null then
708 else if amethodid
isa AIdMethid then
709 name
= amethodid
.n_id
.text
710 name_node
= amethodid
712 # operator, bracket or assign
713 name
= amethodid
.collect_text
714 name_node
= amethodid
716 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
721 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
722 var mprop
: nullable MMethod = null
723 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
724 if mprop
== null and look_like_a_root_init
then
725 mprop
= modelbuilder
.the_root_init_mmethod
727 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
728 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
731 if mprop
== null then
732 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
733 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
734 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
735 modelbuilder
.the_root_init_mmethod
= mprop
736 mprop
.is_root_init
= true
738 mprop
.is_init
= is_init
739 mprop
.is_new
= n_kwnew
!= null
740 if mprop
.is_new
then mclassdef
.mclass
.has_new_factory
= true
741 if parent
isa ATopClassdef then mprop
.is_toplevel
= true
742 self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
)
744 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
745 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
748 # Check name conflicts in the local class for constructors.
750 for p
, n
in mclassdef
.mprop2npropdef
do
751 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
752 check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
)
758 mclassdef
.mprop2npropdef
[mprop
] = self
760 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
762 set_doc
(mpropdef
, modelbuilder
)
764 self.mpropdef
= mpropdef
765 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
766 if mpropdef
.is_intro
then
767 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
769 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
773 redef fun build_signature
(modelbuilder
)
775 var mpropdef
= self.mpropdef
776 if mpropdef
== null then return # Error thus skiped
777 var mclassdef
= mpropdef
.mclassdef
778 var mmodule
= mclassdef
.mmodule
779 var nsig
= self.n_signature
781 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
782 var root_init
= mclassdef
.mclass
.root_init
783 if root_init
!= null then
784 # Inherit the initializers by refinement
785 mpropdef
.new_msignature
= root_init
.new_msignature
786 assert mpropdef
.initializers
.is_empty
787 mpropdef
.initializers
.add_all root_init
.initializers
791 # Retrieve info from the signature AST
792 var param_names
= new Array[String] # Names of parameters from the AST
793 var param_types
= new Array[MType] # Types of parameters from the AST
795 var ret_type
: nullable MType = null # Return type from the AST
797 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
798 param_names
= nsig
.param_names
799 param_types
= nsig
.param_types
800 vararg_rank
= nsig
.vararg_rank
801 ret_type
= nsig
.ret_type
804 # Look for some signature to inherit
805 # FIXME: do not inherit from the intro, but from the most specific
806 var msignature
: nullable MSignature = null
807 if not mpropdef
.is_intro
then
808 msignature
= mpropdef
.mproperty
.intro
.msignature
809 if msignature
== null then return # Skip error
811 # The local signature is adapted to use the local formal types, if any.
812 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
814 # Check inherited signature arity
815 if param_names
.length
!= msignature
.arity
then
817 if nsig
!= null then node
= nsig
else node
= self
818 modelbuilder
.error
(node
, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
821 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
822 # FIXME UGLY: inherit signature from a super-constructor
823 for msupertype
in mclassdef
.supertypes
do
824 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
825 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
826 if candidate
!= null then
827 if msignature
== null then
828 msignature
= candidate
.intro
.as(MMethodDef).msignature
835 # Inherit the signature
836 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
837 # Parameters are untyped, thus inherit them
838 param_types
= new Array[MType]
839 for mparameter
in msignature
.mparameters
do
840 param_types
.add
(mparameter
.mtype
)
842 vararg_rank
= msignature
.vararg_rank
844 if msignature
!= null and ret_type
== null then
845 ret_type
= msignature
.return_mtype
848 if param_names
.length
!= param_types
.length
then
849 # Some parameters are typed, other parameters are not typed.
850 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
854 var mparameters
= new Array[MParameter]
855 for i
in [0..param_names
.length
[ do
856 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
857 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
858 mparameters
.add
(mparameter
)
861 # In `new`-factories, the return type is by default the classtype.
862 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
864 msignature
= new MSignature(mparameters
, ret_type
)
865 mpropdef
.msignature
= msignature
866 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
867 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
868 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
871 var at
= self.get_single_annotation
("lazy", modelbuilder
)
872 if at
!= null then modelbuilder
.error
(at
, "Syntax error: `lazy` must be used on attributes.")
875 redef fun check_signature
(modelbuilder
)
877 var mpropdef
= self.mpropdef
878 if mpropdef
== null then return # Error thus skiped
879 var mclassdef
= mpropdef
.mclassdef
880 var mmodule
= mclassdef
.mmodule
881 var nsig
= self.n_signature
882 var mysignature
= self.mpropdef
.msignature
883 if mysignature
== null then return # Error thus skiped
885 # Lookup for signature in the precursor
886 # FIXME all precursors should be considered
887 if not mpropdef
.is_intro
then
888 var msignature
= mpropdef
.mproperty
.intro
.msignature
889 if msignature
== null then return
891 var precursor_ret_type
= msignature
.return_mtype
892 var ret_type
= mysignature
.return_mtype
893 if ret_type
!= null and precursor_ret_type
== null then
894 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
895 self.mpropdef
.msignature
= null
899 if mysignature
.arity
> 0 then
900 # Check parameters types
901 for i
in [0..mysignature
.arity
[ do
902 var myt
= mysignature
.mparameters
[i
].mtype
903 var prt
= msignature
.mparameters
[i
].mtype
904 var node
= nsig
.n_params
[i
]
905 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
906 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt} as in {mpropdef.mproperty.intro}.")
907 self.mpropdef
.msignature
= null
911 if precursor_ret_type
!= null then
912 var node
: nullable ANode = null
913 if nsig
!= null then node
= nsig
.n_type
914 if node
== null then node
= self
915 if ret_type
== null then
916 # Inherit the return type
917 ret_type
= precursor_ret_type
918 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
919 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type} as in {mpropdef.mproperty.intro}.")
920 self.mpropdef
.msignature
= null
925 if mysignature
.arity
> 0 then
926 # Check parameters visibility
927 for i
in [0..mysignature
.arity
[ do
928 var nt
= nsig
.n_params
[i
].n_type
929 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
932 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
937 redef class AAttrPropdef
938 redef type MPROPDEF: MAttributeDef
940 # Is the node tagged `noinit`?
943 # Is the node tagged lazy?
946 # Has the node a default value?
947 # Could be through `n_expr` or `n_block`
948 var has_value
= false
950 # The guard associated to a lazy attribute.
951 # Because some engines does not have a working `isset`,
952 # this additional attribute is used to guard the lazy initialization.
953 # TODO: to remove once isset is correctly implemented
954 var mlazypropdef
: nullable MAttributeDef
956 # The associated getter (read accessor) if any
957 var mreadpropdef
: nullable MMethodDef is writable
958 # The associated setter (write accessor) if any
959 var mwritepropdef
: nullable MMethodDef is writable
961 redef fun build_property
(modelbuilder
, mclassdef
)
963 var mclass
= mclassdef
.mclass
967 var atabstract
= self.get_single_annotation
("abstract", modelbuilder
)
968 if atabstract
== null then
969 if mclass
.kind
== interface_kind
then
970 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
971 else if mclass
.kind
== enum_kind
then
972 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
973 else if mclass
.kind
== extern_kind
then
974 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the extern class {mclass}.")
977 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
978 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
979 self.mpropdef
= mpropdef
980 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
984 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
985 if mreadprop
== null then
986 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
987 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
988 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
990 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
991 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
993 mclassdef
.mprop2npropdef
[mreadprop
] = self
995 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
996 self.mreadpropdef
= mreadpropdef
997 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
998 set_doc
(mreadpropdef
, modelbuilder
)
999 if mpropdef
!= null then mpropdef
.mdoc
= mreadpropdef
.mdoc
1000 if atabstract
!= null then mreadpropdef
.is_abstract
= true
1002 has_value
= n_expr
!= null or n_block
!= null
1004 if atabstract
!= null and has_value
then
1005 modelbuilder
.error
(atabstract
, "Error: `abstract` attributes cannot have an initial value")
1009 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
1010 if atnoinit
== null then atnoinit
= self.get_single_annotation
("noautoinit", modelbuilder
)
1011 if atnoinit
!= null then
1014 modelbuilder
.error
(atnoinit
, "Error: `noautoinit` attributes cannot have an initial value")
1017 if atabstract
!= null then
1018 modelbuilder
.error
(atnoinit
, "Error: `noautoinit` attributes cannot be abstract")
1023 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
1024 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
1025 if atlazy
!= null or atautoinit
!= null then
1026 if atlazy
!= null and atautoinit
!= null then
1027 modelbuilder
.error
(atlazy
, "Error: lazy incompatible with autoinit")
1030 if not has_value
then
1031 if atlazy
!= null then
1032 modelbuilder
.error
(atlazy
, "Error: a lazy attribute needs a value")
1033 else if atautoinit
!= null then
1034 modelbuilder
.error
(atautoinit
, "Error: a autoinit attribute needs a value")
1040 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
1041 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
1042 self.mlazypropdef
= mlazypropdef
1045 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
1046 if atreadonly
!= null then
1047 if not has_value
then
1048 modelbuilder
.error
(atreadonly
, "Error: a readonly attribute needs a value")
1050 # No setter, so just leave
1054 var writename
= name
+ "="
1055 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
1056 if atwritable
!= null then
1057 if not atwritable
.n_args
.is_empty
then
1058 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
1061 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
1062 var nwkwredef
: nullable Token = null
1063 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
1064 if mwriteprop
== null then
1066 if atwritable
!= null then
1067 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
1069 mvisibility
= private_visibility
1071 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1072 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
1073 mwriteprop
.deprecation
= mreadprop
.deprecation
1075 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
1076 if atwritable
!= null then
1077 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
1080 mclassdef
.mprop2npropdef
[mwriteprop
] = self
1082 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1083 self.mwritepropdef
= mwritepropdef
1084 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1085 mwritepropdef
.mdoc
= mreadpropdef
.mdoc
1086 if atabstract
!= null then mwritepropdef
.is_abstract
= true
1089 redef fun build_signature
(modelbuilder
)
1091 var mreadpropdef
= self.mreadpropdef
1092 var mpropdef
= self.mpropdef
1093 if mreadpropdef
== null then return # Error thus skipped
1094 var mclassdef
= mreadpropdef
.mclassdef
1095 var mmodule
= mclassdef
.mmodule
1096 var mtype
: nullable MType = null
1099 var ntype
= self.n_type
1100 if ntype
!= null then
1101 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1102 if mtype
== null then return
1105 var inherited_type
: nullable MType = null
1106 # Inherit the type from the getter (usually an abstract getter)
1107 if not mreadpropdef
.is_intro
then
1108 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1109 if msignature
== null then return # Error, thus skipped
1110 inherited_type
= msignature
.return_mtype
1111 if inherited_type
!= null then
1112 # The inherited type is adapted to use the local formal types, if any.
1113 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1114 if mtype
== null then mtype
= inherited_type
1118 var nexpr
= self.n_expr
1119 if mtype
== null then
1120 if nexpr
!= null then
1121 if nexpr
isa ANewExpr then
1122 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1123 else if nexpr
isa AIntExpr then
1124 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1125 if cla
!= null then mtype
= cla
.mclass_type
1126 else if nexpr
isa AFloatExpr then
1127 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1128 if cla
!= null then mtype
= cla
.mclass_type
1129 else if nexpr
isa ACharExpr then
1130 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1131 if cla
!= null then mtype
= cla
.mclass_type
1132 else if nexpr
isa ABoolExpr then
1133 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1134 if cla
!= null then mtype
= cla
.mclass_type
1135 else if nexpr
isa ASuperstringExpr then
1136 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1137 if cla
!= null then mtype
= cla
.mclass_type
1138 else if nexpr
isa AStringFormExpr then
1139 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1140 if cla
!= null then mtype
= cla
.mclass_type
1142 modelbuilder
.error
(self, "Error: Untyped attribute {mreadpropdef}. Implicit typing allowed only for literals and new.")
1145 if mtype
== null then return
1147 else if ntype
!= null and inherited_type
== mtype
then
1148 if nexpr
isa ANewExpr then
1149 var xmtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1150 if xmtype
== mtype
then
1151 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1156 if mtype
== null then
1157 modelbuilder
.error
(self, "Error: Untyped attribute {mreadpropdef}")
1161 if mpropdef
!= null then
1162 mpropdef
.static_mtype
= mtype
1166 var msignature
= new MSignature(new Array[MParameter], mtype
)
1167 mreadpropdef
.msignature
= msignature
1170 var mwritepropdef
= self.mwritepropdef
1171 if mwritepropdef
!= null then
1174 var mparameter
= new MParameter(name
, mtype
, false)
1175 var msignature
= new MSignature([mparameter
], null)
1176 mwritepropdef
.msignature
= msignature
1179 var mlazypropdef
= self.mlazypropdef
1180 if mlazypropdef
!= null then
1181 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1185 redef fun check_signature
(modelbuilder
)
1187 var mpropdef
= self.mpropdef
1188 if mpropdef
== null then return # Error thus skipped
1189 var ntype
= self.n_type
1190 var mtype
= self.mpropdef
.static_mtype
1191 if mtype
== null then return # Error thus skipped
1193 # Lookup for signature in the precursor
1194 # FIXME all precursors should be considered
1195 if not mpropdef
.is_intro
then
1196 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1197 if precursor_type
== null then return
1199 if mtype
!= precursor_type
then
1200 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1205 # Check getter and setter
1206 var meth
= self.mreadpropdef
1207 if meth
!= null then
1208 self.check_method_signature
(modelbuilder
, meth
)
1209 var node
: nullable ANode = ntype
1210 if node
== null then node
= self
1211 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1213 meth
= self.mwritepropdef
1214 if meth
!= null then
1215 self.check_method_signature
(modelbuilder
, meth
)
1216 var node
: nullable ANode = ntype
1217 if node
== null then node
= self
1218 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1222 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1224 var mclassdef
= mpropdef
.mclassdef
1225 var mmodule
= mclassdef
.mmodule
1226 var nsig
= self.n_type
1227 var mysignature
= mpropdef
.msignature
1228 if mysignature
== null then return # Error thus skiped
1230 # Lookup for signature in the precursor
1231 # FIXME all precursors should be considered
1232 if not mpropdef
.is_intro
then
1233 var msignature
= mpropdef
.mproperty
.intro
.msignature
1234 if msignature
== null then return
1236 if mysignature
.arity
!= msignature
.arity
then
1238 if nsig
!= null then node
= nsig
else node
= self
1239 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1242 var precursor_ret_type
= msignature
.return_mtype
1243 var ret_type
= mysignature
.return_mtype
1244 if ret_type
!= null and precursor_ret_type
== null then
1246 if nsig
!= null then node
= nsig
else node
= self
1247 modelbuilder
.error
(node
, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1251 if mysignature
.arity
> 0 then
1252 # Check parameters types
1253 for i
in [0..mysignature
.arity
[ do
1254 var myt
= mysignature
.mparameters
[i
].mtype
1255 var prt
= msignature
.mparameters
[i
].mtype
1257 if nsig
!= null then node
= nsig
else node
= self
1258 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
1259 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
1263 if precursor_ret_type
!= null then
1265 if nsig
!= null then node
= nsig
else node
= self
1266 if ret_type
== null then
1267 # Inherit the return type
1268 ret_type
= precursor_ret_type
1269 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
1270 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1277 redef class ATypePropdef
1278 redef type MPROPDEF: MVirtualTypeDef
1280 redef fun build_property
(modelbuilder
, mclassdef
)
1282 var name
= self.n_id
.text
1283 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1284 if mprop
== null then
1285 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1286 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1287 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1288 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type {name}")
1291 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1293 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1294 assert mprop
isa MVirtualTypeProp
1295 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1297 mclassdef
.mprop2npropdef
[mprop
] = self
1299 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1300 self.mpropdef
= mpropdef
1301 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1302 if mpropdef
.is_intro
then
1303 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1305 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1307 set_doc
(mpropdef
, modelbuilder
)
1309 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1310 if atfixed
!= null then
1311 mpropdef
.is_fixed
= true
1315 redef fun build_signature
(modelbuilder
)
1317 var mpropdef
= self.mpropdef
1318 if mpropdef
== null then return # Error thus skipped
1319 var mclassdef
= mpropdef
.mclassdef
1320 var mmodule
= mclassdef
.mmodule
1321 var mtype
: nullable MType = null
1323 var ntype
= self.n_type
1324 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1325 if mtype
== null then return
1327 mpropdef
.bound
= mtype
1328 # print "{mpropdef}: {mtype}"
1331 redef fun check_signature
(modelbuilder
)
1333 var mpropdef
= self.mpropdef
1334 if mpropdef
== null then return # Error thus skipped
1336 var bound
= self.mpropdef
.bound
1337 if bound
== null then return # Error thus skipped
1339 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1341 var mclassdef
= mpropdef
.mclassdef
1342 var mmodule
= mclassdef
.mmodule
1343 var anchor
= mclassdef
.bound_mtype
1346 if bound
isa MVirtualType then
1347 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1348 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1350 if seen
.has
(bound
) then
1352 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1356 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1357 if not next
isa MVirtualType then break
1362 # Check redefinitions
1363 bound
= mpropdef
.bound
.as(not null)
1364 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1365 var supbound
= p
.bound
1366 if supbound
== null then break # broken super bound, skip error
1368 modelbuilder
.error
(self, "Redef Error: Virtual type {mpropdef.mproperty} is fixed in super-class {p.mclassdef.mclass}")
1371 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1372 # Still a warning to pass existing bad code
1373 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1376 if not modelbuilder
.check_subtype
(n_type
, mmodule
, anchor
, bound
, supbound
) then
1377 modelbuilder
.error
(n_type
, "Redef Error: Wrong bound type. Found {bound}, expected a subtype of {supbound}, as in {p}.")