1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2008 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 # Build MM entity from NIT AST and check conformance of these entities.
18 # This module introduce specific MM class (MMSrcXXX) that specialize the abstract one from metamodel
24 # Class specialization hierarchy sorter
25 private class CSHSorter
26 special AbstractSorter[MMLocalClass]
27 redef fun compare
(a
, b
)
29 return a
.cshe
.rank
<=> b
.cshe
.rank
35 redef class MMSrcModule
36 # Syntax analysis and MM construction for the module
37 # Require that supermodules are processed
38 fun do_mmbuilder
(tc
: ToolContext)
40 # Import global classes
43 # Create local classes and attach them to global classes
44 var mmbv
= new ClassBuilderVisitor(tc
, self)
46 if tc
.error_count
> 0 then exit
(1)
48 # Import unrefined local classes and attach them to global classes
51 # Resolve classes in super clauses
52 var mmbv1
= new ClassSpecializationBuilderVisitor(tc
, self)
54 if tc
.error_count
> 0 then exit
(1)
56 # Compute specialization relation
57 for c
in local_classes
do
58 if visibility_for
(c
.global
.intro
.module) < c
.global
.visibility_level
then
61 c
.compute_super_classes
64 # Class that we will process now are those in the hierarchy
65 # Its mean all the visible classes and their super-classes
66 # Note that leaves invisible classes are not in the 'classes' set
67 var classes
= class_specialization_hierarchy
.to_a
69 # Prepare class list to process the following in a right order
70 var sorter
= once
new CSHSorter
73 # Compute class ancestors types
74 var mmbv1b
= new ClassAncestorBuilder(tc
, self)
76 c
.accept_class_visitor
(mmbv1b
)
79 if tc
.error_count
> 0 then exit
(1)
81 # Check class conformity
82 var mmbv1b
= new ClassVerifierVisitor(tc
, self)
84 c
.accept_class_visitor
(mmbv1b
)
86 if tc
.error_count
> 0 then exit
(1)
88 # Property inhritance and introduction
89 var mmbv2
= new PropertyBuilderVisitor(tc
, self)
91 # Inherit global properties
92 c
.inherit_global_properties
94 # Global property introduction and redefinition
95 c
.accept_class_visitor
(mmbv2
)
97 # Default and inherited constructor if needed
98 if c
isa MMSrcLocalClass and c
.global
.intro
== c
and not c
.global
.is_universal
and not c
.global
.is_interface
then
99 c
.process_default_constructors
(mmbv2
)
102 # Note that inherited unredefined property are processed on demand latter
104 if tc
.error_count
> 0 then exit
(1)
106 # Property signature analysis and inheritance conformance
107 var mmbv3
= new PropertyVerifierVisitor(tc
, self)
109 c
.accept_properties_visitor
(mmbv3
)
112 # Check inherited local properties
114 for g
in c
.global_properties
do
115 if visibility_for
(g
.intro
.module) < g
.visibility_level
then continue
120 if tc
.error_count
> 0 then exit
(1)
124 redef class MMLocalClass
125 # Accept a class visitor (on class nodes)
126 private fun accept_class_visitor
(v
: AbsSyntaxVisitor)
130 # Accept a class visitor (on class properties)
131 private fun accept_properties_visitor
(v
: AbsSyntaxVisitor)
136 redef class MMSrcLocalClass
137 redef fun accept_class_visitor
(v
)
144 # Accept a class visitor (on class properties)
145 redef fun accept_properties_visitor
(v
)
151 for p
in src_local_properties
do
152 p
.accept_property_visitor
(v
)
156 # Introduce or inherit default constructors
157 private fun process_default_constructors
(v
: PropertyBuilderVisitor)
159 # Is there already a constructor ?
160 for gp
in global_properties
do
162 # Return if explicit constructor in the class
163 if gp
.intro
.local_class
== self then return
167 # Collect visible constructors in super stateful classes
168 var super_inits
= new ArraySet[MMLocalProperty]
169 var super_constructors
= new ArraySet[MMGlobalProperty]
170 for sc
in che
.direct_greaters
do
171 if sc
.global
.is_universal
or sc
.global
.is_interface
then continue
172 for gp
in sc
.global_properties
do
173 if not gp
.is_init
then continue
174 super_constructors
.add
(gp
)
176 var initname
= once
("init".to_symbol
)
177 if sc
.has_global_property_by_name
(initname
) then
178 var gp
= sc
.get_property_by_name
(initname
)
179 super_inits
.add
(self[gp
])
183 # Collect unassigned attributes
184 var unassigned_attributes
= new Array[MMSrcAttribute]
185 for a
in src_local_properties
do
186 if a
isa MMSrcAttribute then
188 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
192 if not super_constructors
.is_empty
then
193 # Select most specific classes introducing inheritable constructors
194 # Mixin classes are skipped
195 var supers
= new Array[MMLocalClass]
196 for gp
in super_constructors
do
197 var sc
= gp
.local_class
198 if supers
.has
(sc
) then continue
199 if not sc
.global
.is_mixin
then
203 supers
= che
.order
.select_smallests
(supers
)
205 # A mixin class can only have 0 or 1 most specific non-mixin superclass
206 var superclass
: nullable MMLocalClass = null # This most specific non-mixin superclass (if any)
208 if supers
.length
> 1 then
209 v
.error
(nodes
.first
, "Error: Explicit constructor required in {self} since multiple inheritance of constructor is forbiden. Conflicting classes are {supers.join(", ")}. Costructors are {super_constructors.join(", ")}.")
211 else if supers
.length
== 1 then
212 superclass
= supers
.first
215 for gp
in super_constructors
do
216 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
217 if superclass
== null or gp
.local_class
== superclass
then
218 make_visible_an_inherited_global_property
(gp
)
221 global
.mixin_of
= superclass
.as(not null).global
# FIXME Dear! this should break!
223 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
225 # unassigned attributes, then implicit consructors are generated
226 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
227 add_src_local_property
(v
, p
)
228 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
232 # Add a source property
233 # Register it to the class and attach it to global property
234 private fun add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
236 var pname
= prop
.name
237 # Check double definition in the same class
238 if src_local_properties
.has_key
(pname
) then
239 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
242 src_local_properties
[pname
] = prop
244 # Intro or redefinition ?
245 if has_global_property_by_name
(pname
) then
246 var g
= get_property_by_name
(pname
)
247 prop
.inherit_global
(g
)
250 if not prop
.is_global_set
then
252 prop
.global
.is_init
= prop
.is_init
257 redef class MMLocalProperty
258 private fun accept_property_visitor
(v
: AbsSyntaxVisitor)
263 redef class MMImplicitInit
264 readable var _super_init
: nullable MMLocalProperty = null
265 redef fun accept_property_visitor
(v
)
267 var base
: nullable MMLocalProperty = null
268 for p
in super_inits
do
269 if p
.signature
.arity
> 0 then
273 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
280 var params
= new Array[MMType]
282 var sig
= base
.signature
283 for i
in [0..sig
.arity
[ do
287 for a
in unassigned_attributes
do
288 var sig
= a
.signature
289 if sig
== null then return # Broken attribute definition
290 params
.add
(sig
.return_type
.as(not null))
292 signature
= new MMSignature(params
, null, local_class
.get_type
)
297 # Concrete NIT class specialization relation
300 # The related AST node
301 readable var _node
: ASuperclass
302 redef readable var _local_class
: MMLocalClass
304 init(n
: ASuperclass, c
: MMLocalClass)
311 ###############################################################################
313 # A pass visitor for syntax analysis.
314 # * Build the classes and attach them to global classes
315 # * Collect generic formal parameters.
316 private class ClassBuilderVisitor
317 special AbsSyntaxVisitor
318 # Current class arity
319 readable writable var _local_class_arity
: Int = 0
321 # Current class formal parameters
322 readable writable var _formals
: nullable Map[Symbol, MMTypeFormalParameter]
324 redef fun visit
(n
) do n
.accept_class_builder
(self)
328 # Another pass visitor for syntax analysis.
329 # * Build ancertors (with only class informations not the type one)
330 private class ClassSpecializationBuilderVisitor
331 special AbsSyntaxVisitor
332 redef fun visit
(n
) do n
.accept_class_specialization_builder
(self)
336 # Another pass visitor for syntax analysis.
337 # * Compute types in ancestors
338 private class ClassAncestorBuilder
339 special AbsSyntaxVisitor
340 redef fun visit
(n
) do n
.accept_class_ancestor_builder
(self)
344 # Another pass visitor for syntax analysis.
345 # * Checks classes in regard to superclasses
346 private class ClassVerifierVisitor
347 special AbsSyntaxVisitor
348 redef fun visit
(n
) do n
.accept_class_verifier
(self)
353 # Another pass visitor for syntax analysis.
354 # * Build propertie names
355 # * Build local properties and attache them to global properties
356 # * Attach bound to formal types
357 private class PropertyBuilderVisitor
358 special AbsSyntaxVisitor
359 redef fun visit
(n
) do n
.accept_property_builder
(self)
363 # Another pass pass visitor for syntax analysis.
364 # * Check property conformance
365 private class PropertyVerifierVisitor
366 special AbsSyntaxVisitor
368 # The signature currently build
369 readable writable var _signature_builder
: SignatureBuilder
371 redef fun visit
(n
) do n
.accept_property_verifier
(self)
376 _signature_builder
= new SignatureBuilder
380 # Information about a signature currently build
381 private class SignatureBuilder
382 # Current visited parameter types
383 readable writable var _params
: Array[PParam] = new Array[PParam]
385 # Visited parameters without type information added
386 readable writable var _untyped_params
: Array[PParam] = new Array[PParam]
388 # Position of the current star parameter
389 readable writable var _vararg_rank
: Int = -1
391 # Current closure declarations
392 readable writable var _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
394 # True is a problen occured durring building
395 readable writable var _has_error_occured
: Bool = false
398 readable writable var _signature
: nullable MMSignature = null
401 ###############################################################################
404 private fun accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
405 private fun accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
406 private fun accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
407 private fun accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
408 private fun accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
409 private fun accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
413 # Import supermodules and compute visibility
414 fun import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
416 # Import super-modules
417 var module_names_to_import
= new Array[Symbol]
418 var module_visibility
= new HashMap[Symbol, Int]
419 var no_import
: nullable PImport = null
420 for i
in n_imports
do
421 var n
= i
.module_name
423 module_names_to_import
.add
(n
)
424 module_visibility
[n
] = i
.visibility_level
429 if no_import
!= null then
430 if not module_names_to_import
.is_empty
then
431 tc
.error
("{no_import.locate}: Error: Top modules cannot import other modules.")
433 else if module_names_to_import
.is_empty
then
434 var stdname
= once
"standard".to_symbol
435 module_names_to_import
.add
(stdname
)
436 module_visibility
[stdname
] = 1
439 mod
.import_supers_modules
(module_names_to_import
)
441 for mname
in module_names_to_import
do
442 var level
= module_visibility
[mname
]
443 var m
= tc
.get_module
(mname
, mod
)
444 mod
.add_super_module
(m
, level
)
449 redef class APackagedecl
450 redef fun accept_class_builder
(v
)
452 if n_id
.to_symbol
!= v
.module.name
then
453 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
459 # Imported module name (or null)
460 fun module_name
: nullable Symbol is abstract
462 # Visibility level (intrude/public/private)
463 fun visibility_level
: Int is abstract
466 redef fun module_name
468 return n_id
.to_symbol
470 redef fun visibility_level
472 return n_visibility
.level
475 redef class ANoImport
476 redef fun module_name
482 redef class PVisibility
484 fun level
: Int is abstract
486 redef class APublicVisibility
487 redef fun level
do return 1
489 redef class AProtectedVisibility
490 redef fun level
do return 2
492 redef class APrivateVisibility
493 redef fun level
do return 3
495 redef class AIntrudeVisibility
496 redef fun level
do return 0
500 redef class PClassdef
501 redef fun local_class
: MMSrcLocalClass do return _local_class
.as(not null)
502 var _local_class
: nullable MMSrcLocalClass
505 fun name
: Symbol is abstract
507 # Number of formal parameters
508 fun arity
: Int do return 0
510 # Visibility of the class
511 fun visibility_level
: Int do return 1
513 redef fun accept_class_builder
(v
)
515 var local_class
: MMSrcLocalClass
517 var local_classes
= mod
.src_local_classes
518 if (local_classes
.has_key
(name
)) then
519 local_class
= local_classes
[name
]
520 if self isa AClassdef then
521 # If we are not a special implicit class then rant
522 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
525 local_class
.nodes
.add
(self)
527 local_class
= new MMSrcLocalClass(mod
, name
, self, arity
)
528 local_classes
[name
] = local_class
529 if not mod
.has_global_class_named
(name
) then
530 local_class
.new_global
532 local_class
.set_global
(mod
.global_class_named
(name
))
536 _local_class
= local_class
537 v
.local_class_arity
= 0
538 v
.formals
= local_class
.formal_dict
547 redef fun accept_abs_syntax_visitor
(v
)
549 v
.local_class
= _local_class
555 redef class PClasskind
556 fun is_interface
: Bool do return false
557 fun is_universal
: Bool do return false
558 fun is_abstract
: Bool do return false
561 redef class AInterfaceClasskind
562 redef fun is_interface
do return true
564 redef class AUniversalClasskind
565 redef fun is_universal
do return true
567 redef class AAbstractClasskind
568 redef fun is_abstract
do return true
571 redef class AClassdef
574 return n_id
.to_symbol
578 return n_formaldefs
.length
580 redef fun accept_class_verifier
(v
)
583 var glob
= _local_class
.global
584 if glob
.intro
== _local_class
then
586 glob
.visibility_level
= visibility_level
587 glob
.is_interface
= n_classkind
.is_interface
588 glob
.is_abstract
= n_classkind
.is_abstract
589 glob
.is_universal
= n_classkind
.is_universal
590 if n_kwredef
!= null then
591 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
594 for c
in _local_class
.cshe
.direct_greaters
do
596 if glob
.is_interface
then
597 if cg
.is_universal
then
598 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
599 else if not cg
.is_interface
then
600 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
602 else if glob
.is_universal
then
603 if not cg
.is_interface
and not cg
.is_universal
then
604 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
607 if cg
.is_universal
then
608 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
618 glob
.check_visibility
(v
, self, v
.module)
619 if n_kwredef
== null then
620 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
624 if glob
.intro
.arity
!= _local_class
.arity
then
625 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
629 not glob
.is_interface
and n_classkind
.is_interface
or
630 not glob
.is_abstract
and n_classkind
.is_abstract
or
631 not glob
.is_universal
and n_classkind
.is_universal
633 v
.error
(self, "Redef error: cannot change kind of class {name}.")
637 redef fun visibility_level
639 return n_visibility
.level
643 redef class AMainClassdef
646 return once
"Sys".to_symbol
650 redef class ATopClassdef
653 return once
"Object".to_symbol
657 class MMSrcTypeFormalParameter
658 special MMTypeFormalParameter
659 # The associated node
660 readable var _node
: AFormaldef
662 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
664 super(name
, pos
, local_class
)
669 redef class AFormaldef
670 # The associated formal generic parameter (MM entity)
671 var _formal
: nullable MMSrcTypeFormalParameter
673 redef fun accept_class_builder
(v
)
675 var name
= n_id
.to_symbol
676 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
677 _formal
= formal_type
678 v
.local_class_arity
= v
.local_class_arity
+ 1
679 v
.local_class
.register_formal
(formal_type
)
680 v
.formals
[name
] = formal_type
684 redef fun accept_class_verifier
(v
)
687 var c
= v
.local_class
688 var o
= c
.global
.intro
690 if n_type
== null then
691 _formal
.bound
= v
.module.type_any
.as_nullable
693 var stype
= n_type
.get_stype
(v
)
694 if stype
== null then return
695 _formal
.bound
= stype
698 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
699 if n_type
== null then
702 var stype
= n_type
.get_stype
(v
)
703 if stype
== null then return
704 _formal
.bound
= stype
705 if _formal
.bound
!= ob
then
706 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
713 redef class ASuperclass
714 readable var _ancestor
: nullable MMSrcAncestor
716 redef fun accept_class_specialization_builder
(v
)
719 var c
= n_type
.get_local_class
(v
)
720 if c
== null then return
721 var ancestor
= new MMSrcAncestor(self, c
)
723 v
.local_class
.add_direct_parent
(ancestor
)
726 redef fun accept_class_ancestor_builder
(v
)
729 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
730 _ancestor
.inheriter
= v
.local_class
.get_type
733 redef fun accept_class_verifier
(v
)
736 n_type
.check_conform
(v
)
741 # Process and check properties of the property.
742 # * Distinguish inits and methods
743 # * Inherit or check visibility.
744 # * Check redef errors.
745 # * Check forbiden attribute definitions.
746 # * Check signature conformance.
747 private fun process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
749 if prop
.global
.intro
== prop
then
750 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
752 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
756 # The part of process_and_check when prop is an introduction
757 private fun do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
759 var glob
= prop
.global
760 var gbc
= prop
.local_class
.global
761 if v
.local_class
.global
.visibility_level
>= 3 then
762 # Method of private classes are private
765 glob
.visibility_level
= visibility_level
767 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
769 if glob
.is_attribute
then
770 if gbc
.is_interface
then
771 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
772 else if gbc
.is_universal
then
773 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
775 else if glob
.is_init
then
776 if gbc
.is_interface
then
777 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
778 else if gbc
.is_universal
then
779 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
782 if prop
.signature
== null then
784 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
785 inherit_signature
(v
, prop
, supers
)
787 if prop
.signature
!= null or v
.signature_builder
.has_error_occured
then
789 else if not v
.signature_builder
.untyped_params
.is_empty
then
790 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
792 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
793 for clos
in v
.signature_builder
.closure_decls
do
794 prop
.signature
.closures
.add
(clos
.variable
.closure
)
800 private fun inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
802 var s
= prop
.signature
804 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
807 if v
.signature_builder
.params
.length
!= isig
.arity
then
808 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
811 for p
in v
.signature_builder
.params
do
812 var t
= isig
[p
.position
]
814 if p
.position
== isig
.vararg_rank
then
826 # The part of process_and_check when prop is a redefinition
827 private fun do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
829 var is_init
= self isa AConcreteInitPropdef
830 var glob
= prop
.global
832 if not has_redef
then
833 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
836 if glob
.is_init
and not is_init
then
837 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
838 else if not glob
.is_init
and is_init
then
839 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
842 var s
= prop
.signature
843 #print "process {prop.local_class.module}::{prop.local_class}::{prop} from global {prop.global.local_property.local_class.module}::{prop.global.local_property.local_class}::{prop.global.local_property}"
844 for i
in prop
.prhe
.direct_greaters
do
845 var ip
= i
.local_class
[prop
.global
]
846 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
849 #print "{prop.full_name} inherits signature from {ip.full_name}"
850 if v
.signature_builder
.params
.length
!= isig
.arity
then
851 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
854 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
855 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
858 for p
in v
.signature_builder
.params
do
859 var t
= isig
[p
.position
]
861 if p
.position
== isig
.vararg_rank
then
871 var nberr
= v
.tc
.error_count
872 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
873 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
875 #print "orig signature: {i.signature.recv} . {i.signature}"
876 #print "inh signature: {isig.recv} . {isig}"
877 #print "redef signature: {s.recv} . {s}"
879 if s
.arity
!= isig
.arity
then
880 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
882 for i
in [0..s
.arity
[ do
883 if s
[i
] != isig
[i
] then
884 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
889 var srt
= s
.return_type
890 var isrt
= isig
.return_type
891 if srt
== null and isrt
!= null then
892 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
893 else if srt
!= null and isrt
== null then
894 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
895 else if srt
!= null and isrt
!= null and not srt
< isrt
then
896 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
897 else if not s
< isig
and nberr
== v
.tc
.error_count
then
898 # Systematic fallback for conformance check
899 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
900 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
902 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
906 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
907 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
909 glob
.check_visibility
(v
, self, v
.module, true)
913 redef class AAttrPropdef
914 redef readable var _readmethod
: nullable MMSrcMethod
915 redef readable var _writemethod
: nullable MMSrcMethod
916 var _prop
: nullable MMSrcAttribute
917 redef fun prop
do return _prop
.as(not null)
919 redef fun accept_property_builder
(v
)
922 var name
= n_id
.to_symbol
923 var lc
= v
.local_class
924 var prop
= new MMSrcAttribute(name
, lc
, self)
926 v
.local_class
.add_src_local_property
(v
, prop
)
928 if n_readable
!= null then
929 name
= n_id
.text
.substring_from
(1).to_symbol
930 var readmethod
= new MMReadImplementationMethod(name
, lc
, self)
931 _readmethod
= readmethod
932 v
.local_class
.add_src_local_property
(v
, readmethod
)
934 if n_writable
!= null then
935 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
936 var writemethod
= new MMWriteImplementationMethod(name
, lc
, self)
937 _writemethod
= writemethod
938 v
.local_class
.add_src_local_property
(v
, writemethod
)
942 redef fun accept_property_verifier
(v
)
946 if n_type
!= null then
947 var t0
= n_type
.get_stype
(v
)
948 if t0
!= null then t
= t0
else return
950 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
955 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
956 prop
.signature
= signature
957 var visibility_level
= n_visibility
.level
958 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
959 if n_readable
!= null then
960 var m
= _readmethod
.as(not null)
961 m
.signature
= signature
962 process_and_check
(v
, m
, n_readable
.n_kwredef
!= null, visibility_level
)
963 n_type
.check_visibility
(v
, m
)
965 if n_writable
!= null then
966 var m
= _writemethod
.as(not null)
967 m
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
968 process_and_check
(v
, m
, n_writable
.n_kwredef
!= null, visibility_level
)
969 n_type
.check_visibility
(v
, m
)
973 redef fun accept_abs_syntax_visitor
(v
)
975 v
.local_property
= _prop
977 v
.local_property
= null
981 redef class AMethPropdef
983 readable var _name
: nullable Symbol
985 var _method
: nullable MMMethSrcMethod
986 redef fun method
do return _method
.as(not null)
988 redef fun accept_property_builder
(v
)
992 if n_methid
== null then
993 if self isa AConcreteInitPropdef then
994 name
= once
"init".to_symbol
996 name
= once
"main".to_symbol
999 name
= n_methid
.name
.as(not null)
1000 # FIXME: Add the 'unary' keyword
1001 if n_methid
.name
== (once
"-".to_symbol
) then
1002 var ns
= n_signature
1003 if ns
isa ASignature and ns
.n_params
.length
== 0 then
1004 name
= once
"unary -".to_symbol
1009 var prop
= new MMMethSrcMethod(name
, v
.local_class
, self)
1011 v
.local_class
.add_src_local_property
(v
, prop
)
1014 redef fun accept_property_verifier
(v
)
1016 v
.signature_builder
= new SignatureBuilder
1019 if v
.signature_builder
.has_error_occured
then return
1021 if v
.signature_builder
.signature
== null then
1022 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1024 method
.signature
= v
.signature_builder
.signature
.as(not null)
1026 var visibility_level
= 1
1027 if n_visibility
!= null and n_visibility
.level
> 1 then
1028 visibility_level
= n_visibility
.level
1030 process_and_check
(v
, method
, n_kwredef
!= null, visibility_level
)
1031 if n_signature
!= null then n_signature
.check_visibility
(v
, method
)
1034 redef fun accept_abs_syntax_visitor
(v
)
1036 v
.local_property
= _method
1038 v
.local_property
= null
1042 redef class AMainMethPropdef
1043 redef fun process_and_check
(v
, prop
, has_redef
, visibility_level
)
1045 prop
.global
.visibility_level
= visibility_level
1046 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1047 # Disable all checks for main
1051 redef class ATypePropdef
1052 redef fun prop
do return _prop
.as(not null)
1053 var _prop
: nullable MMSrcTypeProperty
1055 redef fun accept_property_builder
(v
)
1058 var name
= n_id
.to_symbol
1059 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1061 v
.local_class
.add_src_local_property
(v
, prop
)
1064 redef fun accept_property_verifier
(v
)
1067 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1068 prop
.signature
= signature
1069 var visibility_level
= n_visibility
.level
1070 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
1073 redef fun accept_abs_syntax_visitor
(v
)
1075 v
.local_property
= _prop
1077 v
.local_property
= null
1081 # Visitor used to build a full method name from multiple tokens
1082 private class MethidAccumulator
1084 readable var _name
: Buffer = new Buffer
1088 _name
.append
(n
.text
)
1097 readable var _name
: nullable Symbol
1099 redef fun accept_property_builder
(v
)
1101 var accumulator
= new MethidAccumulator
1102 accumulator
.visit
(self)
1103 _name
= accumulator
.name
.to_s
.to_symbol
1108 redef class PSignature
1109 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1110 fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1113 redef class ASignature
1114 redef fun accept_property_verifier
(v
)
1117 if v
.signature_builder
.has_error_occured
then
1119 else if not v
.signature_builder
.untyped_params
.is_empty
then
1120 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1121 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1124 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1125 var pars
= new Array[MMType]
1126 for p
in v
.signature_builder
.params
do
1127 pars
.add
(p
.stype
.as(not null))
1129 var ret
: nullable MMType = null
1130 if n_type
!= null then
1131 ret
= n_type
.get_stype
(v
)
1133 v
.signature_builder
.has_error_occured
= true
1137 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1138 if v
.signature_builder
.vararg_rank
>= 0 then
1139 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1141 for clos
in v
.signature_builder
.closure_decls
do
1142 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1147 redef fun check_visibility
(v
, p
)
1149 if p
.global
.visibility_level
>= 3 then return
1150 for n
in n_params
do
1151 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1153 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1158 redef readable var _position
: Int = 0
1160 redef fun variable
: ParamVariable do return _variable
.as(not null)
1161 var _variable
: nullable ParamVariable
1163 # The type of the parameter in signature
1164 readable writable var _stype
: nullable MMType
1166 redef fun accept_property_verifier
(v
)
1169 _position
= v
.signature_builder
.params
.length
1170 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1171 v
.signature_builder
.params
.add
(self)
1172 v
.signature_builder
.untyped_params
.add
(self)
1173 if n_type
!= null then
1174 var stype
= n_type
.get_stype
(v
)
1175 if stype
== null then
1176 v
.signature_builder
.has_error_occured
= true
1179 for p
in v
.signature_builder
.untyped_params
do
1182 if v
.signature_builder
.vararg_rank
== -1 then
1183 v
.signature_builder
.vararg_rank
= p
.position
1185 v
.error
(self, "Error: A vararg parameter is already defined.")
1187 stype
= v
.type_array
(stype
)
1189 p
.variable
.stype
= stype
1191 v
.signature_builder
.untyped_params
.clear
1195 fun is_vararg
: Bool is abstract
1199 redef fun is_vararg
do return n_dotdotdot
!= null
1202 redef class AClosureDecl
1203 redef fun variable
: ClosureVariable do return _variable
.as(not null)
1204 var _variable
: nullable ClosureVariable
1206 redef fun accept_property_verifier
(v
)
1208 var old_signature_builder
= v
.signature_builder
1209 v
.signature_builder
= new SignatureBuilder
1211 if v
.signature_builder
.has_error_occured
then
1214 var sig
= v
.signature_builder
.signature
1216 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1218 if sig
.return_type
!= null and n_kwbreak
!= null then
1219 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1222 # Add the finalizer to the closure signature
1223 var finalize_sig
= new MMSignature(new Array[MMType], null, v
.module.type_any
) # FIXME should be no receiver
1224 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1225 sig
.closures
.add
(finalizer_clos
)
1227 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1228 v
.signature_builder
= old_signature_builder
1229 old_signature_builder
.closure_decls
.add
(self)
1230 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1235 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1236 private fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1240 redef fun check_visibility
(v
, p
)
1242 if p
.global
.visibility_level
>= 3 then return
1243 var t
= get_stype
(v
)
1244 if t
== null then return
1245 var bc
= t
.local_class
1246 if bc
.global
.visibility_level
>= 3 then
1247 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1250 n
.check_visibility
(v
, p
)
1256 redef fun accept_class_builder
(v
) do end
1257 redef fun accept_property_builder
(v
) do end
1258 redef fun accept_property_verifier
(v
) do end