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 if not npropdef
isa ATypePropdef then continue
108 var mpropdef
= npropdef
.mpropdef
109 if mpropdef
== null then continue
110 if mpropdef
.bound
== null then continue
111 if not check_virtual_types_circularity
(npropdef
, mpropdef
.mproperty
, mclassdef
.bound_mtype
, mclassdef
.mmodule
) then
112 # Invalidate the bound
113 mpropdef
.is_broken
= true
114 mpropdef
.bound
= mclassdef
.mmodule
.model
.null_type
117 for npropdef
in nclassdef2
.n_propdefs
do
118 # Check ATypePropdef first since they may be required for the other properties
119 if not npropdef
isa ATypePropdef then continue
120 npropdef
.check_signature
(self)
123 for npropdef
in nclassdef2
.n_propdefs
do
124 if npropdef
isa ATypePropdef then continue
125 npropdef
.check_signature
(self)
128 process_default_constructors
(nclassdef
)
131 # the root init of the Object class
132 # Is usually implicitly defined
133 # Then explicit or implicit definitions of root-init are attached to it
134 var the_root_init_mmethod
: nullable MMethod
136 # Introduce or inherit default constructor
137 # This is the last part of `build_properties`.
138 private fun process_default_constructors
(nclassdef
: AClassdef)
140 var mclassdef
= nclassdef
.mclassdef
.as(not null)
142 # Are we a refinement
143 if not mclassdef
.is_intro
then return
145 # Look for the init in Object, or create it
146 if mclassdef
.mclass
.name
== "Object" and the_root_init_mmethod
== null then
147 # Create the implicit root-init method
148 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
149 mprop
.is_root_init
= true
150 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
151 var mparameters
= new Array[MParameter]
152 var msignature
= new MSignature(mparameters
, null)
153 mpropdef
.msignature
= msignature
154 mpropdef
.new_msignature
= msignature
156 nclassdef
.mfree_init
= mpropdef
157 self.toolcontext
.info
("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
158 the_root_init_mmethod
= mprop
162 # Is there already a constructor defined?
163 var defined_init
: nullable MMethodDef = null
164 for mpropdef
in mclassdef
.mpropdefs
do
165 if not mpropdef
isa MMethodDef then continue
166 if not mpropdef
.mproperty
.is_init
then continue
167 if mpropdef
.mproperty
.is_root_init
then
168 assert defined_init
== null
169 defined_init
= mpropdef
170 else if mpropdef
.mproperty
.name
== "init" then
171 # An explicit old-style init named "init", so return
176 if not nclassdef
isa AStdClassdef then return
178 # Collect undefined attributes
179 var mparameters
= new Array[MParameter]
180 var initializers
= new Array[MProperty]
181 for npropdef
in nclassdef
.n_propdefs
do
182 if npropdef
isa AMethPropdef then
183 if not npropdef
.is_autoinit
then continue # Skip non tagged autoinit
184 if npropdef
.mpropdef
== null then return # Skip broken method
185 var sig
= npropdef
.mpropdef
.msignature
186 if sig
== null then continue # Skip broken method
188 for param
in sig
.mparameters
do
189 var ret_type
= param
.mtype
190 var mparameter
= new MParameter(param
.name
, ret_type
, false)
191 mparameters
.add
(mparameter
)
193 initializers
.add
(npropdef
.mpropdef
.mproperty
)
194 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
196 if npropdef
isa AAttrPropdef then
197 var mreadpropdef
= npropdef
.mreadpropdef
198 if mreadpropdef
== null or mreadpropdef
.msignature
== null then return # Skip broken attribute
199 if npropdef
.noinit
then continue # Skip noinit attribute
200 var atlateinit
= npropdef
.get_single_annotation
("lateinit", self)
201 if atlateinit
!= null then
202 # For lateinit attributes, call the reader to force
203 # the lazy initialization of the attribute.
204 initializers
.add
(mreadpropdef
.mproperty
)
205 mreadpropdef
.mproperty
.is_autoinit
= true
208 if npropdef
.has_value
then continue
209 var paramname
= mreadpropdef
.mproperty
.name
210 var ret_type
= mreadpropdef
.msignature
.return_mtype
211 if ret_type
== null then return
212 var mparameter
= new MParameter(paramname
, ret_type
, false)
213 mparameters
.add
(mparameter
)
214 var msetter
= npropdef
.mwritepropdef
215 if msetter
== null then
216 # No setter, it is a readonly attribute, so just add it
217 initializers
.add
(npropdef
.mpropdef
.mproperty
)
218 npropdef
.mpropdef
.mproperty
.is_autoinit
= true
220 # Add the setter to the list
221 initializers
.add
(msetter
.mproperty
)
222 msetter
.mproperty
.is_autoinit
= true
227 if the_root_init_mmethod
== null then return
229 # Look for most-specific new-stype init definitions
230 var spropdefs
= the_root_init_mmethod
.lookup_super_definitions
(mclassdef
.mmodule
, mclassdef
.bound_mtype
)
231 if spropdefs
.is_empty
then
232 toolcontext
.error
(nclassdef
.location
, "Error: `{mclassdef}` does not specialize `{the_root_init_mmethod.intro_mclassdef}`. Possible duplication of the root class `Object`?")
236 # Look at the autoinit class-annotation
237 var autoinit
= nclassdef
.get_single_annotation
("autoinit", self)
238 var noautoinit
= nclassdef
.get_single_annotation
("noautoinit", self)
239 if autoinit
!= null then
240 # Just throws the collected initializers
244 if noautoinit
!= null then
245 error
(autoinit
, "Error: `autoinit` and `noautoinit` are incompatible.")
248 if autoinit
.n_args
.is_empty
then
249 error
(autoinit
, "Syntax Error: `autoinit` expects method identifiers, use `noautoinit` to clear all autoinits.")
252 # Get and check each argument
253 for narg
in autoinit
.n_args
do
256 error
(narg
, "Syntax Error: `autoinit` expects method identifiers.")
260 # Search the property.
261 # To avoid bad surprises, try to get the setter first.
262 var p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
+ "=")
264 p
= try_get_mproperty_by_name
(narg
, mclassdef
, id
)
267 error
(narg
, "Error: unknown method `{id}`")
270 if not p
.is_autoinit
then
271 error
(narg
, "Error: `{p}` is not an autoinit method")
275 # Register the initializer and the parameters
278 if pd
isa MMethodDef then
279 # Get the signature resolved for the current receiver
280 var sig
= pd
.msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mclassdef
.mmodule
, false)
281 mparameters
.add_all
(sig
.mparameters
)
288 # Search the longest-one and checks for conflict
289 var longest
= spropdefs
.first
290 if spropdefs
.length
> 1 then
291 # part 1. find the longest list
292 for spd
in spropdefs
do
293 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
296 # Check for conflict in the order of initializers
297 # Each initializer list must me a prefix of the longest list
298 # If `noautoinit` is set, just ignore conflicts
299 if noautoinit
== null then for spd
in spropdefs
do
301 for p
in spd
.initializers
do
302 if p
!= longest
.initializers
[i
] then
303 var proposal
= new ArraySet[MProperty]
304 for spd2
in spropdefs
do
305 proposal
.add_all spd2
.initializers
307 proposal
.add_all initializers
308 self.error
(nclassdef
, "Error: cannot generate automatic init for class {mclassdef.mclass}. Conflict in the order in inherited initializers {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")}). Use `autoinit` to order initializers. eg `autoinit {proposal.join(", ")}`")
309 # TODO: invalidate the initializer to avoid more errors
317 if noautoinit
!= null then
318 # If there is local or inherited initializers, then complain.
319 if initializers
.is_empty
and longest
.initializers
.is_empty
then
320 warning
(noautoinit
, "useless-noautoinit", "Warning: the list of autoinit is already empty.")
322 # Just clear initializers
326 # Can we just inherit?
327 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
328 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
329 mclassdef
.mclass
.root_init
= longest
333 # Combine the inherited list to what is collected
334 if longest
.initializers
.length
> 0 then
335 mparameters
.prepend longest
.new_msignature
.mparameters
336 initializers
.prepend longest
.initializers
341 # If we already have a basic init definition, then setup its initializers
342 if defined_init
!= null then
343 defined_init
.initializers
.add_all
(initializers
)
344 var msignature
= new MSignature(mparameters
, null)
345 defined_init
.new_msignature
= msignature
346 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
347 mclassdef
.mclass
.root_init
= defined_init
351 # Else create the local implicit basic init definition
352 var mprop
= the_root_init_mmethod
.as(not null)
353 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
354 mpropdef
.has_supercall
= true
355 mpropdef
.initializers
.add_all
(initializers
)
356 var msignature
= new MSignature(mparameters
, null)
357 mpropdef
.new_msignature
= msignature
358 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
359 nclassdef
.mfree_init
= mpropdef
360 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
361 mclassdef
.mclass
.root_init
= mpropdef
364 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
365 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
367 var mmodule
= mpropdef
.mclassdef
.mmodule
368 var mproperty
= mpropdef
.mproperty
370 # Extract visibility information of the main part of `mtype`
371 # It is a case-by case
372 var vis_type
: nullable MVisibility = null # The own visibility of the type
373 var mmodule_type
: nullable MModule = null # The original module of the type
374 mtype
= mtype
.undecorate
375 if mtype
isa MClassType then
376 vis_type
= mtype
.mclass
.visibility
377 mmodule_type
= mtype
.mclass
.intro_mmodule
378 else if mtype
isa MVirtualType then
379 vis_type
= mtype
.mproperty
.visibility
380 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
381 else if mtype
isa MParameterType then
382 # nothing, always visible
383 else if mtype
isa MNullType then
386 node
.debug
"Unexpected type {mtype}"
390 if vis_type
!= null then
391 assert mmodule_type
!= null
392 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
393 if mproperty
.visibility
> vis_type
then
394 error
(node
, "Error: the {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`.")
396 else if mproperty
.visibility
> vis_module_type
then
397 error
(node
, "Error: the {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`.")
402 # No error, try to go deeper in generic types
403 if node
isa AType then
404 for a
in node
.n_types
do
406 if t
== null then continue # Error, thus skipped
407 check_visibility
(a
, t
, mpropdef
)
409 else if mtype
isa MGenericType then
410 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
414 # Detect circularity errors for virtual types.
415 fun check_virtual_types_circularity
(node
: ANode, mproperty
: MVirtualTypeProp, recv
: MType, mmodule
: MModule): Bool
418 # Slow case: progress on each resolution until we visit all without getting a loop
420 # The graph used to detect loops
421 var mtype
= mproperty
.mvirtualtype
422 var poset
= new POSet[MType]
424 # The work-list of types to resolve
425 var todo
= new List[MType]
428 while not todo
.is_empty
do
432 if not t
.need_anchor
then continue
434 # Get the types derived of `t` (subtypes and bounds)
436 if t
isa MNullableType then
438 else if t
isa MGenericType then
440 else if t
isa MVirtualType then
442 # Because `vt` is possibly unchecked, we have to do the bound-lookup manually
443 var defs
= vt
.lookup_definitions
(mmodule
, recv
)
444 # TODO something to manage correctly bound conflicts
445 assert not defs
.is_empty
446 nexts
= new Array[MType]
448 var next
= defs
.first
.bound
449 if next
== null then return false
452 else if t
isa MClassType then
453 # Basic type, nothing to to
455 else if t
isa MParameterType then
456 # Parameter types cannot depend on virtual types, so nothing to do
464 if poset
.has_edge
(next
, t
) then
465 if mtype
== next
then
466 error
(node
, "Error: circularity of virtual type definition: {next} <-> {t}.")
468 error
(node
, "Error: circularity of virtual type definition: {mtype} -> {next} <-> {t}.")
472 poset
.add_edge
(t
, next
)
482 # Does the MPropDef contains a call to super or a call of a super-constructor?
483 # Subsequent phases of the frontend (esp. typing) set it if required
484 var has_supercall
: Bool = false is writable
487 redef class AClassdef
488 # Marker used in `ModelBuilder::build_properties`
489 private var build_properties_is_done
= false
491 # The free init (implicitely constructed by the class if required)
492 var mfree_init
: nullable MMethodDef = null
496 # The base init of the class.
497 # Used to get the common new_msignature and initializers
499 # TODO: Where to put this information is not clear because unlike other
500 # informations, the initialisers are stable in a same class.
501 var root_init
: nullable MMethodDef = null
504 redef class MClassDef
505 # What is the `APropdef` associated to a `MProperty`?
506 # Used to check multiple definition of a property.
507 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
509 # Build the virtual type `SELF` only for introduction `MClassDef`
510 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
512 if not is_intro
then return
515 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
517 # If SELF type is declared nowherer?
518 if mprop
== null then return
520 # SELF is not a virtual type? it is weird but we ignore it
521 if not mprop
isa MVirtualTypeProp then return
523 # Is this the intro of SELF in the library?
524 var intro
= mprop
.intro
525 var intro_mclassdef
= intro
.mclassdef
526 if intro_mclassdef
== self then
527 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
529 # SELF must be declared in Object, otherwise this will create conflicts
530 if intro_mclassdef
.mclass
.name
!= "Object" then
531 modelbuilder
.error
(nintro
, "Error: the virtual type `SELF` must be declared in `Object`.")
534 # SELF must be public
535 if mprop
.visibility
!= public_visibility
then
536 modelbuilder
.error
(nintro
, "Error: the virtual type `SELF` must be public.")
539 # SELF must not be fixed
540 if intro
.is_fixed
then
541 modelbuilder
.error
(nintro
, "Error: the virtual type `SELF` cannot be fixed.")
547 # This class introduction inherits a SELF
548 # We insert an artificial property to update it
549 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
550 mpropdef
.bound
= mclass
.mclass_type
555 # The associated main model entity
556 type MPROPDEF: MPropDef
558 # The associated propdef once build by a `ModelBuilder`
559 var mpropdef
: nullable MPROPDEF is writable
561 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) do end
562 private fun build_signature
(modelbuilder
: ModelBuilder) do end
563 private fun check_signature
(modelbuilder
: ModelBuilder) do end
564 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
566 var mvisibility
= public_visibility
567 if nvisibility
!= null then
568 mvisibility
= nvisibility
.mvisibility
569 if mvisibility
== intrude_visibility
then
570 modelbuilder
.error
(nvisibility
, "Error: `intrude` is not a legal visibility for properties.")
571 mvisibility
= public_visibility
574 if mclassdef
.mclass
.visibility
== private_visibility
then
575 if mvisibility
== protected_visibility
then
576 assert nvisibility
!= null
577 modelbuilder
.error
(nvisibility
, "Error: `private` is the only legal visibility for properties in a private class.")
578 else if mvisibility
== private_visibility
then
579 assert nvisibility
!= null
580 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: `private` is superfluous since the only legal visibility for properties in a private class is private.")
582 mvisibility
= private_visibility
587 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
589 var ndoc
= self.n_doc
591 var mdoc
= ndoc
.to_mdoc
593 mdoc
.original_mentity
= mpropdef
594 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
595 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
598 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
599 if at_deprecated
!= null then
600 if not mpropdef
.is_intro
then
601 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
603 var info
= new MDeprecationInfo
604 ndoc
= at_deprecated
.n_doc
605 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
606 mpropdef
.mproperty
.deprecation
= info
611 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
613 if nvisibility
== null then return
614 var mvisibility
= nvisibility
.mvisibility
615 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
616 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from `{mprop.visibility}` to `{mvisibility}`.")
620 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
622 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
623 modelbuilder
.error
(self, "Error: a property `{mprop}` is already defined in class `{mclassdef.mclass}` at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
626 if mprop
isa MMethod and mprop
.is_root_init
then return true
627 if kwredef
== null then
629 modelbuilder
.error
(self, "Redef Error: `{mclassdef.mclass}::{mprop.name}` is an inherited property. To redefine it, add the `redef` keyword.")
633 # Check for full-name conflicts in the package.
634 # A public property should have a unique qualified name `package::class::prop`.
635 if mprop
.intro_mclassdef
.mmodule
.mgroup
!= null and mprop
.visibility
>= protected_visibility
then
636 var others
= modelbuilder
.model
.get_mproperties_by_name
(mprop
.name
)
637 if others
!= null then for other
in others
do
638 if other
!= mprop
and other
.intro_mclassdef
.mmodule
.mgroup
!= null and other
.intro_mclassdef
.mmodule
.mgroup
.mpackage
== mprop
.intro_mclassdef
.mmodule
.mgroup
.mpackage
and other
.intro_mclassdef
.mclass
.name
== mprop
.intro_mclassdef
.mclass
.name
and other
.visibility
>= protected_visibility
then
639 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}`.")
645 if not need_redef
then
646 modelbuilder
.error
(self, "Error: no property `{mclassdef.mclass}::{mprop.name}` is inherited. Remove the `redef` keyword to define a new property.")
653 # Checks for useless type in redef signatures.
654 private fun check_repeated_types
(modelbuilder
: ModelBuilder) do end
657 redef class ASignature
658 # Is the model builder has correctly visited the signature
659 var is_visited
= false
660 # Names of parameters from the AST
661 # REQUIRE: is_visited
662 var param_names
= new Array[String]
663 # Types of parameters from the AST
664 # REQUIRE: is_visited
665 var param_types
= new Array[MType]
666 # Rank of the vararg (of -1 if none)
667 # REQUIRE: is_visited
668 var vararg_rank
: Int = -1
670 var ret_type
: nullable MType = null
672 # Visit and fill information about a signature
673 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
675 var mmodule
= mclassdef
.mmodule
676 var param_names
= self.param_names
677 var param_types
= self.param_types
678 for np
in self.n_params
do
679 param_names
.add
(np
.n_id
.text
)
680 var ntype
= np
.n_type
681 if ntype
!= null then
682 var mtype
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, ntype
, true)
683 if mtype
== null then return false # Skip error
684 for i
in [0..param_names
.length-param_types
.length
[ do
685 param_types
.add
(mtype
)
687 if np
.n_dotdotdot
!= null then
688 if self.vararg_rank
!= -1 then
689 modelbuilder
.error
(np
, "Error: `{param_names[self.vararg_rank]}` is already a vararg")
692 self.vararg_rank
= param_names
.length
- 1
697 var ntype
= self.n_type
698 if ntype
!= null then
699 self.ret_type
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, ntype
, true)
700 if self.ret_type
== null then return false # Skip error
703 self.is_visited
= true
707 private fun check_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
710 for np
in self.n_params
do
711 var ntype
= np
.n_type
712 if ntype
!= null then
713 if modelbuilder
.resolve_mtype
(mclassdef
.mmodule
, mclassdef
, ntype
) == null then
718 var ntype
= self.n_type
719 if ntype
!= null then
720 if modelbuilder
.resolve_mtype
(mclassdef
.mmodule
, mclassdef
, ntype
) == null then
724 if not res
then is_broken
= true
730 # The associated mparameter if any
731 var mparameter
: nullable MParameter = null
734 redef class AMethPropdef
735 redef type MPROPDEF: MMethodDef
737 # Is the method annotated `autoinit`?
738 var is_autoinit
= false
740 # Can self be used as a root init?
741 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
743 # Need the `init` keyword
744 if n_kwinit
== null then return false
745 # Need to by anonymous
746 if self.n_methid
!= null then return false
747 # No annotation on itself
748 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
750 var amod
= self.parent
.parent
.as(AModule)
751 var amoddecl
= amod
.n_moduledecl
752 if amoddecl
!= null then
753 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
754 if old
!= null then return false
757 if self.n_signature
.n_params
.length
> 0 then
758 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
761 # Cannot be private or something
762 if not self.n_visibility
isa APublicVisibility then
763 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
770 redef fun build_property
(modelbuilder
, mclassdef
)
772 var n_kwinit
= n_kwinit
773 var n_kwnew
= n_kwnew
774 var is_init
= n_kwinit
!= null or n_kwnew
!= null
776 var amethodid
= self.n_methid
778 if amethodid
== null then
782 else if n_kwinit
!= null then
785 else if n_kwnew
!= null then
791 else if amethodid
isa AIdMethid then
792 name
= amethodid
.n_id
.text
793 name_node
= amethodid
795 # operator, bracket or assign
796 name
= amethodid
.collect_text
797 name_node
= amethodid
799 var arity
= self.n_signature
.n_params
.length
800 if name
== "+" and arity
== 0 then
802 else if name
== "-" and arity
== 0 then
804 else if name
== "~" and arity
== 0 then
807 if amethodid
.is_binary
and arity
!= 1 then
808 modelbuilder
.error
(self.n_signature
, "Syntax Error: binary operator `{name}` requires exactly one parameter; got {arity}.")
809 else if amethodid
.min_arity
> arity
then
810 modelbuilder
.error
(self.n_signature
, "Syntax Error: `{name}` requires at least {amethodid.min_arity} parameter(s); got {arity}.")
815 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
816 var mprop
: nullable MMethod = null
817 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
818 if mprop
== null and look_like_a_root_init
then
819 mprop
= modelbuilder
.the_root_init_mmethod
821 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
822 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
825 if mprop
== null then
826 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
827 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
828 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
829 modelbuilder
.the_root_init_mmethod
= mprop
830 mprop
.is_root_init
= true
832 mprop
.is_init
= is_init
833 mprop
.is_new
= n_kwnew
!= null
834 if mprop
.is_new
then mclassdef
.mclass
.has_new_factory
= true
835 if name
== "sys" then mprop
.is_toplevel
= true # special case for sys allowed in `new` factories
836 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
) then
837 mprop
.is_broken
= true
841 if mprop
.is_broken
then
844 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
845 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
848 # Check name conflicts in the local class for constructors.
850 for p
, n
in mclassdef
.mprop2npropdef
do
851 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
852 if not check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
) then
853 mprop
.is_broken
= true
861 mclassdef
.mprop2npropdef
[mprop
] = self
863 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
865 set_doc
(mpropdef
, modelbuilder
)
867 self.mpropdef
= mpropdef
868 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
869 if mpropdef
.is_intro
then
870 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
872 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
876 redef fun build_signature
(modelbuilder
)
878 var mpropdef
= self.mpropdef
879 if mpropdef
== null then return # Error thus skiped
880 var mclassdef
= mpropdef
.mclassdef
881 var mmodule
= mclassdef
.mmodule
882 var nsig
= self.n_signature
884 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
885 var root_init
= mclassdef
.mclass
.root_init
886 if root_init
!= null then
887 # Inherit the initializers by refinement
888 mpropdef
.new_msignature
= root_init
.new_msignature
889 assert mpropdef
.initializers
.is_empty
890 mpropdef
.initializers
.add_all root_init
.initializers
894 var accept_special_last_parameter
= self.n_methid
== null or self.n_methid
.accept_special_last_parameter
895 var return_is_mandatory
= self.n_methid
!= null and self.n_methid
.return_is_mandatory
897 # Retrieve info from the signature AST
898 var param_names
= new Array[String] # Names of parameters from the AST
899 var param_types
= new Array[MType] # Types of parameters from the AST
901 var ret_type
: nullable MType = null # Return type from the AST
903 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
904 param_names
= nsig
.param_names
905 param_types
= nsig
.param_types
906 vararg_rank
= nsig
.vararg_rank
907 ret_type
= nsig
.ret_type
910 # Look for some signature to inherit
911 # FIXME: do not inherit from the intro, but from the most specific
912 var msignature
: nullable MSignature = null
913 if not mpropdef
.is_intro
then
914 msignature
= mpropdef
.mproperty
.intro
.msignature
915 if msignature
== null then return # Skip error
917 # The local signature is adapted to use the local formal types, if any.
918 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
920 # Check inherited signature arity
921 if param_names
.length
!= msignature
.arity
then
923 if nsig
!= null then node
= nsig
else node
= self
924 modelbuilder
.error
(node
, "Redef Error: expected {msignature.arity} parameter(s) for `{mpropdef.mproperty.name}{msignature}`; got {param_names.length}. See introduction at `{mpropdef.mproperty.full_name}`.")
927 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
928 # FIXME UGLY: inherit signature from a super-constructor
929 for msupertype
in mclassdef
.supertypes
do
930 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
931 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
932 if candidate
!= null then
933 if msignature
== null then
934 msignature
= candidate
.intro
.as(MMethodDef).msignature
941 # Inherit the signature
942 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
943 # Parameters are untyped, thus inherit them
944 param_types
= new Array[MType]
945 for mparameter
in msignature
.mparameters
do
946 param_types
.add
(mparameter
.mtype
)
948 vararg_rank
= msignature
.vararg_rank
950 if msignature
!= null and ret_type
== null then
951 ret_type
= msignature
.return_mtype
954 if param_names
.length
!= param_types
.length
then
955 # Some parameters are typed, other parameters are not typed.
956 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: untyped parameter `{param_names[param_types.length]}'.")
960 var mparameters
= new Array[MParameter]
961 for i
in [0..param_names
.length
[ do
962 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
963 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
964 mparameters
.add
(mparameter
)
967 # In `new`-factories, the return type is by default the classtype.
968 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
970 # Special checks for operator methods
971 if not accept_special_last_parameter
and mparameters
.not_empty
and mparameters
.last
.is_vararg
then
972 modelbuilder
.error
(self.n_signature
.n_params
.last
, "Error: illegal variadic parameter `{mparameters.last}` for `{mpropdef.mproperty.name}`.")
974 if ret_type
== null and return_is_mandatory
then
975 modelbuilder
.error
(self.n_methid
, "Error: mandatory return type for `{mpropdef.mproperty.name}`.")
978 msignature
= new MSignature(mparameters
, ret_type
)
979 mpropdef
.msignature
= msignature
980 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
981 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
982 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
985 var at
= self.get_single_annotation
("lazy", modelbuilder
)
986 if at
!= null then modelbuilder
.error
(at
, "Syntax Error: `lazy` must be used on attributes.")
988 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
989 if atautoinit
!= null then
990 if not mpropdef
.is_intro
then
991 modelbuilder
.error
(atautoinit
, "Error: `autoinit` cannot be set on redefinitions.")
992 else if not mclassdef
.is_intro
then
993 modelbuilder
.error
(atautoinit
, "Error: `autoinit` cannot be used in class refinements.")
995 self.is_autoinit
= true
1000 redef fun check_signature
(modelbuilder
)
1002 var mpropdef
= self.mpropdef
1003 if mpropdef
== null then return # Error thus skiped
1004 var mclassdef
= mpropdef
.mclassdef
1005 var mmodule
= mclassdef
.mmodule
1006 var nsig
= self.n_signature
1007 var mysignature
= mpropdef
.msignature
1008 if mysignature
== null then return # Error thus skiped
1011 if nsig
!= null then
1012 if not nsig
.check_signature
(modelbuilder
, mclassdef
) then
1013 mpropdef
.msignature
= null # invalidate
1014 mpropdef
.is_broken
= true
1015 return # Forward error
1019 # Lookup for signature in the precursor
1020 # FIXME all precursors should be considered
1021 if not mpropdef
.is_intro
then
1022 var msignature
= mpropdef
.mproperty
.intro
.msignature
1023 if msignature
== null then return
1025 var precursor_ret_type
= msignature
.return_mtype
1026 var ret_type
= mysignature
.return_mtype
1027 if ret_type
!= null and precursor_ret_type
== null then
1028 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: `{mpropdef.mproperty}` is a procedure, not a function.")
1029 mpropdef
.msignature
= null
1030 mpropdef
.is_broken
= true
1034 if mysignature
.arity
> 0 then
1035 # Check parameters types
1036 for i
in [0..mysignature
.arity
[ do
1037 var myt
= mysignature
.mparameters
[i
].mtype
1038 var prt
= msignature
.mparameters
[i
].mtype
1039 var node
= nsig
.n_params
[i
]
1040 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
1041 modelbuilder
.error
(node
, "Redef Error: expected `{prt}` for parameter `{mysignature.mparameters[i].name}'; got `{myt}`.")
1042 mpropdef
.msignature
= null
1043 mpropdef
.is_broken
= true
1047 if precursor_ret_type
!= null then
1048 var node
: nullable ANode = null
1049 if nsig
!= null then node
= nsig
.n_type
1050 if node
== null then node
= self
1051 if ret_type
== null then
1052 # Inherit the return type
1053 ret_type
= precursor_ret_type
1054 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
1055 modelbuilder
.error
(node
, "Redef Error: expected `{precursor_ret_type}` for return type; got `{ret_type}`.")
1056 mpropdef
.msignature
= null
1057 mpropdef
.is_broken
= true
1062 if mysignature
.arity
> 0 then
1063 # Check parameters visibility
1064 for i
in [0..mysignature
.arity
[ do
1065 var nt
= nsig
.n_params
[i
].n_type
1066 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
1068 var nt
= nsig
.n_type
1069 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
1071 check_repeated_types
(modelbuilder
)
1074 # For parameters, type is always useless in a redef.
1075 # For return type, type is useless if not covariant with introduction.
1076 redef fun check_repeated_types
(modelbuilder
) do
1077 if mpropdef
.is_intro
or n_signature
== null then return
1079 for param
in n_signature
.n_params
do
1080 if param
.n_type
!= null then
1081 modelbuilder
.advice
(param
.n_type
, "useless-signature", "Warning: useless type repetition on parameter `{param.n_id.text}` for redefined method `{mpropdef.name}`")
1085 var intro
= mpropdef
.mproperty
.intro
1086 var n_intro
= modelbuilder
.mpropdef2npropdef
.get_or_null
(intro
)
1087 if n_intro
== null or not n_intro
isa AMethPropdef then return
1089 var ret_type
= n_signature
.ret_type
1090 if ret_type
!= null and ret_type
== n_intro
.n_signature
.ret_type
then
1091 modelbuilder
.advice
(n_signature
.n_type
, "useless-signature", "Warning: useless return type repetition for redefined method `{mpropdef.name}`")
1097 # Is a return required?
1099 # * True for operators and brackets.
1100 # * False for id and assignment.
1101 fun return_is_mandatory
: Bool do return true
1103 # Can the last parameter be special like a vararg?
1105 # * False for operators: the last one is in fact the only one.
1106 # * False for assignments: it is the right part of the assignment.
1107 # * True for ids and brackets.
1108 fun accept_special_last_parameter
: Bool do return false
1110 # The minimum required number of parameters.
1112 # * 1 for binary operators
1114 # * 1 for assignments
1115 # * 2 for bracket assignments
1117 fun min_arity
: Int do return 1
1119 # Is the `self` a binary operator?
1120 fun is_binary
: Bool do return true
1123 redef class AIdMethid
1124 redef fun return_is_mandatory
do return false
1125 redef fun accept_special_last_parameter
do return true
1126 redef fun min_arity
do return 0
1127 redef fun is_binary
do return false
1130 redef class ABraMethid
1131 redef fun accept_special_last_parameter
do return true
1132 redef fun is_binary
do return false
1135 redef class ABraassignMethid
1136 redef fun return_is_mandatory
do return false
1137 redef fun min_arity
do return 2
1138 redef fun is_binary
do return false
1141 redef class AAssignMethid
1142 redef fun return_is_mandatory
do return false
1143 redef fun is_binary
do return false
1146 redef class AAttrPropdef
1147 redef type MPROPDEF: MAttributeDef
1149 # The static type of the property (declared, inferred or inherited)
1150 # This attribute is also used to check if the property was analyzed and is valid.
1151 var mtype
: nullable MType
1153 # Is the node tagged `noinit`?
1156 # Is the node tagged lazy?
1159 # Has the node a default value?
1160 # Could be through `n_expr` or `n_block`
1161 var has_value
= false
1163 # The guard associated to a lazy attribute.
1164 # Because some engines does not have a working `isset`,
1165 # this additional attribute is used to guard the lazy initialization.
1166 # TODO: to remove once isset is correctly implemented
1167 var mlazypropdef
: nullable MAttributeDef
1169 # The associated getter (read accessor) if any
1170 var mreadpropdef
: nullable MMethodDef is writable
1171 # The associated setter (write accessor) if any
1172 var mwritepropdef
: nullable MMethodDef is writable
1174 redef fun build_property
(modelbuilder
, mclassdef
)
1176 var mclass
= mclassdef
.mclass
1178 var name
= nid2
.text
1180 var atabstract
= self.get_single_annotation
("abstract", modelbuilder
)
1181 if atabstract
== null then
1182 if not mclass
.kind
.need_init
then
1183 modelbuilder
.error
(self, "Error: attempt to define attribute `{name}` in the {mclass.kind} `{mclass}`.")
1186 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
1187 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
1188 self.mpropdef
= mpropdef
1189 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1193 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
1194 if mreadprop
== null then
1195 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1196 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
1197 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
1199 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
1200 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
1202 mclassdef
.mprop2npropdef
[mreadprop
] = self
1204 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
1205 self.mreadpropdef
= mreadpropdef
1206 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
1207 set_doc
(mreadpropdef
, modelbuilder
)
1208 if mpropdef
!= null then mpropdef
.mdoc
= mreadpropdef
.mdoc
1209 if atabstract
!= null then mreadpropdef
.is_abstract
= true
1211 has_value
= n_expr
!= null or n_block
!= null
1213 if atabstract
!= null and has_value
then
1214 modelbuilder
.error
(atabstract
, "Error: `abstract` attributes cannot have an initial value.")
1218 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
1219 if atnoinit
== null then atnoinit
= self.get_single_annotation
("noautoinit", modelbuilder
)
1220 if atnoinit
!= null then
1223 modelbuilder
.error
(atnoinit
, "Error: `noautoinit` attributes cannot have an initial value.")
1226 if atabstract
!= null then
1227 modelbuilder
.warning
(atnoinit
, "useless-noautoinit", "Warning: superfluous `noautoinit` on abstract attribute.")
1231 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
1232 var atlateinit
= self.get_single_annotation
("lateinit", modelbuilder
)
1233 if atlazy
!= null or atlateinit
!= null then
1234 if atlazy
!= null and atlateinit
!= null then
1235 modelbuilder
.error
(atlazy
, "Error: `lazy` incompatible with `lateinit`.")
1238 if not has_value
then
1239 if atlazy
!= null then
1240 modelbuilder
.error
(atlazy
, "Error: `lazy` attributes need a value.")
1241 else if atlateinit
!= null then
1242 modelbuilder
.error
(atlateinit
, "Error: `lateinit` attributes need a value.")
1248 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
1249 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
1250 self.mlazypropdef
= mlazypropdef
1253 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
1254 if atreadonly
!= null then
1255 if not has_value
then
1256 modelbuilder
.error
(atreadonly
, "Error: `readonly` attributes need a value.")
1258 # No setter, so just leave
1262 if not mclassdef
.is_intro
and not has_value
and not noinit
then
1263 modelbuilder
.advice
(self, "attr-in-refinement", "Warning: attributes in refinement need a value or `noautoinit`.")
1266 var writename
= name
+ "="
1267 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
1268 if atwritable
!= null then
1269 if not atwritable
.n_args
.is_empty
then
1270 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
1273 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
1274 var nwkwredef
: nullable Token = null
1275 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
1276 if mwriteprop
== null then
1278 if atwritable
!= null then
1279 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
1281 mvisibility
= mreadprop
.visibility
1282 # By default, use protected visibility at most
1283 if mvisibility
> protected_visibility
then mvisibility
= protected_visibility
1285 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1286 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
1287 mwriteprop
.deprecation
= mreadprop
.deprecation
1289 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
1290 if atwritable
!= null then
1291 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
1294 mclassdef
.mprop2npropdef
[mwriteprop
] = self
1296 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1297 self.mwritepropdef
= mwritepropdef
1298 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1299 mwritepropdef
.mdoc
= mreadpropdef
.mdoc
1300 if atabstract
!= null then mwritepropdef
.is_abstract
= true
1302 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
1303 if atautoinit
!= null then
1305 modelbuilder
.error
(atautoinit
, "Error: `autoinit` attributes cannot have an initial value.")
1306 else if not mwritepropdef
.is_intro
then
1307 modelbuilder
.error
(atautoinit
, "Error: `autoinit` attributes cannot be set on redefinitions.")
1308 else if not mclassdef
.is_intro
then
1309 modelbuilder
.error
(atautoinit
, "Error: `autoinit` attributes cannot be used in class refinements.")
1310 else if atabstract
== null then
1311 modelbuilder
.warning
(atautoinit
, "useless-autoinit", "Warning: superfluous `autoinit` on attribute.")
1313 else if atabstract
!= null then
1314 # By default, abstract attribute are not autoinit
1319 redef fun build_signature
(modelbuilder
)
1321 var mreadpropdef
= self.mreadpropdef
1322 var mpropdef
= self.mpropdef
1323 if mreadpropdef
== null then return # Error thus skipped
1324 var mclassdef
= mreadpropdef
.mclassdef
1325 var mmodule
= mclassdef
.mmodule
1326 var mtype
: nullable MType = null
1329 var ntype
= self.n_type
1330 if ntype
!= null then
1331 mtype
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, ntype
, true)
1332 if mtype
== null then return
1335 var inherited_type
: nullable MType = null
1336 # Inherit the type from the getter (usually an abstract getter)
1337 if not mreadpropdef
.is_intro
then
1338 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1339 if msignature
== null then return # Error, thus skipped
1340 inherited_type
= msignature
.return_mtype
1341 if inherited_type
!= null then
1342 # The inherited type is adapted to use the local formal types, if any.
1343 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1344 if mtype
== null then mtype
= inherited_type
1348 var nexpr
= self.n_expr
1349 if mtype
== null then
1350 if nexpr
!= null then
1351 if nexpr
isa ANewExpr then
1352 mtype
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, nexpr
.n_type
, true)
1353 else if nexpr
isa AIntegerExpr then
1354 var cla
: nullable MClass = null
1355 if nexpr
.value
isa Int then
1356 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1357 else if nexpr
.value
isa Byte then
1358 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Byte")
1359 else if nexpr
.value
isa Int8 then
1360 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int8")
1361 else if nexpr
.value
isa Int16 then
1362 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int16")
1363 else if nexpr
.value
isa UInt16 then
1364 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "UInt16")
1365 else if nexpr
.value
isa Int32 then
1366 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int32")
1367 else if nexpr
.value
isa UInt32 then
1368 cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "UInt32")
1370 # Should not happen, and should be updated as new types are added
1373 if cla
!= null then mtype
= cla
.mclass_type
1374 else if nexpr
isa AFloatExpr then
1375 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1376 if cla
!= null then mtype
= cla
.mclass_type
1377 else if nexpr
isa ACharExpr then
1378 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1379 if cla
!= null then mtype
= cla
.mclass_type
1380 else if nexpr
isa ABoolExpr then
1381 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1382 if cla
!= null then mtype
= cla
.mclass_type
1383 else if nexpr
isa ASuperstringExpr then
1384 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1385 if cla
!= null then mtype
= cla
.mclass_type
1386 else if nexpr
isa AStringFormExpr then
1387 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1388 if cla
!= null then mtype
= cla
.mclass_type
1390 modelbuilder
.error
(self, "Error: untyped attribute `{mreadpropdef}`. Implicit typing allowed only for literals and new.")
1393 if mtype
== null then return
1395 else if ntype
!= null and inherited_type
== mtype
then
1396 if nexpr
isa ANewExpr then
1397 var xmtype
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, nexpr
.n_type
, true)
1398 if xmtype
== mtype
then
1399 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1404 if mtype
== null then
1405 modelbuilder
.error
(self, "Error: untyped attribute `{mreadpropdef}`.")
1411 if mpropdef
!= null then
1412 mpropdef
.static_mtype
= mtype
1416 var msignature
= new MSignature(new Array[MParameter], mtype
)
1417 mreadpropdef
.msignature
= msignature
1420 var mwritepropdef
= self.mwritepropdef
1421 if mwritepropdef
!= null then
1424 var mparameter
= new MParameter(name
, mtype
, false)
1425 var msignature
= new MSignature([mparameter
], null)
1426 mwritepropdef
.msignature
= msignature
1429 var mlazypropdef
= self.mlazypropdef
1430 if mlazypropdef
!= null then
1431 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1433 check_repeated_types
(modelbuilder
)
1436 redef fun check_signature
(modelbuilder
)
1438 var mpropdef
= self.mpropdef
1439 if mpropdef
== null then return # Error thus skipped
1440 var ntype
= self.n_type
1441 var mtype
= self.mtype
1442 if mtype
== null then return # Error thus skipped
1444 var mclassdef
= mpropdef
.mclassdef
1445 var mmodule
= mclassdef
.mmodule
1448 if ntype
!= null then
1449 if modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
) == null then return
1452 if nexpr
isa ANewExpr then
1453 if modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
) == null then return
1456 # Lookup for signature in the precursor
1457 # FIXME all precursors should be considered
1458 if not mpropdef
.is_intro
then
1459 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1460 if precursor_type
== null then return
1462 if mtype
!= precursor_type
then
1463 modelbuilder
.error
(ntype
.as(not null), "Redef Error: expected `{precursor_type}` type as a bound; got `{mtype}`.")
1468 # Check getter and setter
1469 var meth
= self.mreadpropdef
1470 if meth
!= null then
1471 self.check_method_signature
(modelbuilder
, meth
)
1472 var node
: nullable ANode = ntype
1473 if node
== null then node
= self
1474 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1476 meth
= self.mwritepropdef
1477 if meth
!= null then
1478 self.check_method_signature
(modelbuilder
, meth
)
1479 var node
: nullable ANode = ntype
1480 if node
== null then node
= self
1481 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1485 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1487 var mclassdef
= mpropdef
.mclassdef
1488 var mmodule
= mclassdef
.mmodule
1489 var nsig
= self.n_type
1490 var mysignature
= mpropdef
.msignature
1491 if mysignature
== null then return # Error thus skiped
1493 # Lookup for signature in the precursor
1494 # FIXME all precursors should be considered
1495 if not mpropdef
.is_intro
then
1496 var msignature
= mpropdef
.mproperty
.intro
.msignature
1497 if msignature
== null then return
1499 if mysignature
.arity
!= msignature
.arity
then
1501 if nsig
!= null then node
= nsig
else node
= self
1502 modelbuilder
.error
(node
, "Redef Error: expected {msignature.arity} parameter(s) for `{mpropdef.mproperty.name}{msignature}`; got {mysignature.arity}. See introduction at `{mpropdef.mproperty.full_name}`.")
1505 var precursor_ret_type
= msignature
.return_mtype
1506 var ret_type
= mysignature
.return_mtype
1507 if ret_type
!= null and precursor_ret_type
== null then
1509 if nsig
!= null then node
= nsig
else node
= self
1510 modelbuilder
.error
(node
, "Redef Error: `{mpropdef.mproperty}` is a procedure, not a function.")
1514 if mysignature
.arity
> 0 then
1515 # Check parameters types
1516 for i
in [0..mysignature
.arity
[ do
1517 var myt
= mysignature
.mparameters
[i
].mtype
1518 var prt
= msignature
.mparameters
[i
].mtype
1520 if nsig
!= null then node
= nsig
else node
= self
1521 if not modelbuilder
.check_sametype
(node
, mmodule
, mclassdef
.bound_mtype
, myt
, prt
) then
1522 modelbuilder
.error
(node
, "Redef Error: expected `{prt}` type for parameter `{mysignature.mparameters[i].name}'; got `{myt}`.")
1526 if precursor_ret_type
!= null then
1528 if nsig
!= null then node
= nsig
else node
= self
1529 if ret_type
== null then
1530 # Inherit the return type
1531 ret_type
= precursor_ret_type
1532 else if not modelbuilder
.check_subtype
(node
, mmodule
, mclassdef
.bound_mtype
, ret_type
, precursor_ret_type
) then
1533 modelbuilder
.error
(node
, "Redef Error: expected `{precursor_ret_type}` return type; got `{ret_type}`.")
1539 # Type is useless if the attribute type is the same thant the intro.
1540 redef fun check_repeated_types
(modelbuilder
) do
1541 if mreadpropdef
.is_intro
or n_type
== null then return
1543 var intro
= mreadpropdef
.mproperty
.intro
1544 var n_intro
= modelbuilder
.mpropdef2npropdef
.get_or_null
(intro
)
1545 if n_intro
== null then return
1548 if n_intro
isa AMethPropdef then
1549 ntype
= n_intro
.n_signature
.ret_type
1550 else if n_intro
isa AAttrPropdef and n_intro
.n_type
!= null then
1551 ntype
= n_intro
.n_type
.mtype
1554 if ntype
== null or ntype
!= n_type
.mtype
or mpropdef
== null then return
1555 modelbuilder
.advice
(n_type
, "useless-signature", "Warning: useless type repetition on redefined attribute `{mpropdef.name}`")
1559 redef class ATypePropdef
1560 redef type MPROPDEF: MVirtualTypeDef
1562 redef fun build_property
(modelbuilder
, mclassdef
)
1564 var name
= self.n_id
.text
1565 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1566 if mprop
== null then
1567 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1568 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1569 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1570 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type `{name}`.")
1573 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1575 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1576 assert mprop
isa MVirtualTypeProp
1577 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1579 mclassdef
.mprop2npropdef
[mprop
] = self
1581 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1582 self.mpropdef
= mpropdef
1583 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1584 if mpropdef
.is_intro
then
1585 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1587 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1589 set_doc
(mpropdef
, modelbuilder
)
1591 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1592 if atfixed
!= null then
1593 mpropdef
.is_fixed
= true
1597 redef fun build_signature
(modelbuilder
)
1599 var mpropdef
= self.mpropdef
1600 if mpropdef
== null then return # Error thus skipped
1601 var mclassdef
= mpropdef
.mclassdef
1602 var mmodule
= mclassdef
.mmodule
1603 var mtype
: nullable MType = null
1605 var ntype
= self.n_type
1606 mtype
= modelbuilder
.resolve_mtype_unchecked
(mmodule
, mclassdef
, ntype
, true)
1607 if mtype
== null then return
1609 mpropdef
.bound
= mtype
1610 # print "{mpropdef}: {mtype}"
1613 redef fun check_signature
(modelbuilder
)
1615 var mpropdef
= self.mpropdef
1616 if mpropdef
== null then return # Error thus skipped
1618 var bound
= mpropdef
.bound
1619 if bound
== null then return # Error thus skipped
1621 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1623 var mclassdef
= mpropdef
.mclassdef
1624 var mmodule
= mclassdef
.mmodule
1625 var anchor
= mclassdef
.bound_mtype
1627 var ntype
= self.n_type
1628 if modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
) == null then
1629 mpropdef
.bound
= null
1633 # Check redefinitions
1634 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1635 var supbound
= p
.bound
1636 if supbound
== null then break # broken super bound, skip error
1638 modelbuilder
.error
(self, "Redef Error: virtual type `{mpropdef.mproperty}` is fixed in super-class `{p.mclassdef.mclass}`.")
1641 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1642 # Still a warning to pass existing bad code
1643 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1646 if not modelbuilder
.check_subtype
(n_type
, mmodule
, anchor
, bound
, supbound
) then
1647 modelbuilder
.error
(n_type
, "Redef Error: expected `{supbound}` bound type; got `{bound}`.")