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 meth 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 meth 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 meth accept_class_visitor
(v
: AbsSyntaxVisitor)
130 # Accept a class visitor (on class properties)
131 private meth accept_properties_visitor
(v
: AbsSyntaxVisitor)
136 redef class MMSrcLocalClass
137 redef meth accept_class_visitor
(v
)
144 # Accept a class visitor (on class properties)
145 redef meth 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 meth 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 assert n
isa AAttrPropdef
189 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
193 if not super_constructors
.is_empty
then
194 # Select most specific classes introducing inheritable constructors
195 # Mixin classes are skipped
196 var supers
= new Array[MMLocalClass]
197 for gp
in super_constructors
do
198 var sc
= gp
.local_class
199 if supers
.has
(sc
) then continue
200 if not sc
.global
.is_mixin
then
204 supers
= che
.order
.select_smallests
(supers
)
206 # A mixin class can only have 0 or 1 most specific non-mixin superclass
207 var superclass
: MMLocalClass = null # This most specific non-mixin superclass (if any)
209 if supers
.length
> 1 then
210 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(", ")}.")
212 else if supers
.length
== 1 then
213 superclass
= supers
.first
216 for gp
in super_constructors
do
217 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
218 if superclass
== null or gp
.local_class
== superclass
then
219 make_visible_an_inherited_global_property
(gp
)
222 global
.mixin_of
= superclass
.global
224 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
226 # unassigned attributes, then implicit consructors are generated
227 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
228 add_src_local_property
(v
, p
)
229 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
233 # Add a source property
234 # Register it to the class and attach it to global property
235 private meth add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
237 var pname
= prop
.name
238 # Check double definition in the same class
239 if src_local_properties
.has_key
(pname
) then
240 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
243 src_local_properties
[pname
] = prop
245 # Intro or redefinition ?
246 if has_global_property_by_name
(pname
) then
247 var globs
= properties_by_name
[pname
]
248 if globs
.length
> 1 then
249 v
.error
(prop
.node
, "Name error: {self} inherits {globs.length} global properties named {pname}.")
252 prop
.inherit_global
(g
)
255 if prop
.global
== null then
257 prop
.global
.is_init
= prop
.is_init
262 redef class MMLocalProperty
263 private meth accept_property_visitor
(v
: AbsSyntaxVisitor)
268 redef class MMImplicitInit
269 readable attr _super_init
: MMLocalProperty = null
270 redef meth accept_property_visitor
(v
)
272 var base
: MMLocalProperty = null
273 for p
in super_inits
do
274 if p
.signature
.arity
> 0 then
278 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
285 var params
= new Array[MMType]
287 var sig
= base
.signature
288 for i
in [0..sig
.arity
[ do
292 for a
in unassigned_attributes
do
293 params
.add
(a
.signature
.return_type
)
295 signature
= new MMSignature(params
, null, local_class
.get_type
)
300 # Concrete NIT class specialization relation
303 # The related AST node
304 readable attr _node
: ASuperclass
305 redef readable attr _local_class
: MMLocalClass
307 init(n
: ASuperclass, c
: MMLocalClass)
314 ###############################################################################
316 # A pass visitor for syntax analysis.
317 # * Build the classes and attach them to global classes
318 # * Collect generic formal parameters.
319 private class ClassBuilderVisitor
320 special AbsSyntaxVisitor
321 # Current class arity
322 readable writable attr _local_class_arity
: Int
324 # Current class formal parameters
325 readable writable attr _formals
: Map[Symbol, MMTypeFormalParameter]
327 redef meth visit
(n
) do n
.accept_class_builder
(self)
331 # Another pass visitor for syntax analysis.
332 # * Build ancertors (with only class informations not the type one)
333 private class ClassSpecializationBuilderVisitor
334 special AbsSyntaxVisitor
335 redef meth visit
(n
) do n
.accept_class_specialization_builder
(self)
339 # Another pass visitor for syntax analysis.
340 # * Compute types in ancestors
341 private class ClassAncestorBuilder
342 special AbsSyntaxVisitor
343 redef meth visit
(n
) do n
.accept_class_ancestor_builder
(self)
347 # Another pass visitor for syntax analysis.
348 # * Checks classes in regard to superclasses
349 private class ClassVerifierVisitor
350 special AbsSyntaxVisitor
351 redef meth visit
(n
) do n
.accept_class_verifier
(self)
356 # Another pass visitor for syntax analysis.
357 # * Build propertie names
358 # * Build local properties and attache them to global properties
359 # * Attach bound to formal types
360 private class PropertyBuilderVisitor
361 special AbsSyntaxVisitor
362 redef meth visit
(n
) do n
.accept_property_builder
(self)
366 # Another pass pass visitor for syntax analysis.
367 # * Check property conformance
368 private class PropertyVerifierVisitor
369 special AbsSyntaxVisitor
371 # The signature currently build
372 readable writable attr _signature_builder
: SignatureBuilder
374 redef meth visit
(n
) do n
.accept_property_verifier
(self)
379 _signature_builder
= new SignatureBuilder
383 # Information about a signature currently build
384 private class SignatureBuilder
385 # Current visited parameter types
386 readable writable attr _params
: Array[PParam] = new Array[PParam]
388 # Visited parameters without type information added
389 readable writable attr _untyped_params
: Array[PParam] = new Array[PParam]
391 # Position of the current star parameter
392 readable writable attr _vararg_rank
: Int = -1
394 # Current closure declarations
395 readable writable attr _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
398 readable writable attr _signature
: MMSignature = null
401 ###############################################################################
404 private meth accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
405 private meth accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
406 private meth accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
407 private meth accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
408 private meth accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
409 private meth accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
413 # Import supermodules and compute visibility
414 meth 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
: 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 meth 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 meth module_name
: Symbol is abstract
462 # Visibility level (intrude/public/private)
463 meth visibility_level
: Int is abstract
466 redef meth module_name
468 return n_id
.to_symbol
470 redef meth visibility_level
472 return n_visibility
.level
475 redef class ANoImport
476 redef meth module_name
482 redef class PVisibility
484 meth level
: Int is abstract
486 redef class APublicVisibility
487 redef meth level
do return 1
489 redef class AProtectedVisibility
490 redef meth level
do return 2
492 redef class APrivateVisibility
493 redef meth level
do return 3
495 redef class AIntrudeVisibility
496 redef meth level
do return 0
500 redef class PClassdef
501 redef readable attr _local_class
: MMSrcLocalClass
504 meth name
: Symbol is abstract
506 # Number of formal parameters
507 meth arity
: Int do return 0
509 # Visibility of the class
510 meth visibility_level
: Int do return 1
512 redef meth accept_class_builder
(v
)
514 var local_class
: MMSrcLocalClass
516 var local_classes
= mod
.src_local_classes
517 if (local_classes
.has_key
(name
)) then
518 local_class
= local_classes
[name
]
519 if self isa AClassdef then
520 # If we are not a special implicit class then rant
521 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
524 local_class
.nodes
.add
(self)
526 local_class
= new MMSrcLocalClass(name
, self, arity
)
527 mod
.add_local_class
(local_class
)
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
= new HashMap[Symbol, MMTypeFormalParameter]
544 _local_class
.formal_dict
= v
.formals
548 redef meth accept_abs_syntax_visitor
(v
)
550 v
.local_class
= _local_class
556 redef class PClasskind
557 meth is_interface
: Bool do return false
558 meth is_universal
: Bool do return false
559 meth is_abstract
: Bool do return false
562 redef class AInterfaceClasskind
563 redef meth is_interface
do return true
565 redef class AUniversalClasskind
566 redef meth is_universal
do return true
568 redef class AAbstractClasskind
569 redef meth is_abstract
do return true
572 redef class AClassdef
575 return n_id
.to_symbol
579 return n_formaldefs
.length
581 redef meth accept_class_verifier
(v
)
584 var glob
= _local_class
.global
585 if glob
.intro
== _local_class
then
587 glob
.visibility_level
= visibility_level
588 glob
.is_interface
= n_classkind
.is_interface
589 glob
.is_abstract
= n_classkind
.is_abstract
590 glob
.is_universal
= n_classkind
.is_universal
591 if n_kwredef
!= null then
592 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
595 for c
in _local_class
.cshe
.direct_greaters
do
597 if glob
.is_interface
then
598 if cg
.is_universal
then
599 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
600 else if not cg
.is_interface
then
601 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
603 else if glob
.is_universal
then
604 if not cg
.is_interface
and not cg
.is_universal
then
605 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
608 if cg
.is_universal
then
609 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
619 glob
.check_visibility
(v
, self, v
.module)
620 if n_kwredef
== null then
621 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
625 if glob
.intro
.arity
!= _local_class
.arity
then
626 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
630 not glob
.is_interface
and n_classkind
.is_interface
or
631 not glob
.is_abstract
and n_classkind
.is_abstract
or
632 not glob
.is_universal
and n_classkind
.is_universal
634 v
.error
(self, "Redef error: cannot change kind of class {name}.")
638 redef meth visibility_level
640 return n_visibility
.level
644 redef class AMainClassdef
647 return once
"Sys".to_symbol
651 redef class ATopClassdef
654 return once
"Object".to_symbol
658 class MMSrcTypeFormalParameter
659 special MMTypeFormalParameter
660 # The associated node
661 readable attr _node
: AFormaldef
663 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
665 super(name
, pos
, local_class
)
670 redef class AFormaldef
671 # The associated formal generic parameter (MM entity)
672 attr _formal
: MMSrcTypeFormalParameter
674 redef meth accept_class_builder
(v
)
676 var name
= n_id
.to_symbol
677 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
678 _formal
= formal_type
679 v
.local_class_arity
= v
.local_class_arity
+ 1
680 v
.local_class
.register_formal
(formal_type
)
681 v
.formals
[name
] = formal_type
685 redef meth accept_class_verifier
(v
)
688 var c
= v
.local_class
689 var o
= c
.global
.intro
691 if n_type
== null then
692 _formal
.bound
= v
.module.type_any
694 _formal
.bound
= n_type
.get_stype
(v
)
697 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
698 if n_type
== null then
701 _formal
.bound
= n_type
.get_stype
(v
)
702 if _formal
.bound
!= ob
then
703 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
710 redef class ASuperclass
711 readable attr _ancestor
: MMSrcAncestor
713 redef meth accept_class_specialization_builder
(v
)
716 var c
= n_type
.get_local_class
(v
)
717 var ancestor
= new MMSrcAncestor(self, c
)
719 v
.local_class
.add_direct_parent
(ancestor
)
722 redef meth accept_class_ancestor_builder
(v
)
725 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
726 _ancestor
.inheriter
= v
.local_class
.get_type
729 redef meth accept_class_verifier
(v
)
732 n_type
.check_conform
(v
)
737 # Process and check properties of the property.
738 # * Distinguish inits and methods
739 # * Inherit or check visibility.
740 # * Check redef errors.
741 # * Check forbiden attribute definitions.
742 # * Check signature conformance.
743 private meth process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
745 if prop
.global
.intro
== prop
then
746 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
748 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
752 # The part of process_and_check when prop is an introduction
753 private meth do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
755 var glob
= prop
.global
756 var gbc
= prop
.local_class
.global
757 if v
.local_class
.global
.visibility_level
>= 3 then
758 # Method of private classes are private
761 glob
.visibility_level
= visibility_level
763 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
765 if glob
.is_attribute
then
766 if gbc
.is_interface
then
767 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
768 else if gbc
.is_universal
then
769 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
771 else if glob
.is_init
then
772 if gbc
.is_interface
then
773 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
774 else if gbc
.is_universal
then
775 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
778 if prop
.signature
== null then
780 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
781 inherit_signature
(v
, prop
, supers
)
783 if prop
.signature
!= null then
785 else if not v
.signature_builder
.untyped_params
.is_empty
then
786 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
788 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
789 if v
.signature_builder
.closure_decls
!= null then
790 for clos
in v
.signature_builder
.closure_decls
do
791 prop
.signature
.closures
.add
(clos
.variable
.closure
)
798 private meth inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
800 var s
= prop
.signature
802 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
805 if v
.signature_builder
.params
.length
!= isig
.arity
then
806 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
809 for p
in v
.signature_builder
.params
do
810 var t
= isig
[p
.position
]
812 if p
.position
== isig
.vararg_rank
then
824 # The part of process_and_check when prop is a redefinition
825 private meth do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
827 var is_init
= self isa AConcreteInitPropdef
828 var glob
= prop
.global
830 if not has_redef
then
831 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
834 if glob
.is_init
and not is_init
then
835 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
836 else if not glob
.is_init
and is_init
then
837 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
840 var s
= prop
.signature
841 #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}"
842 for i
in prop
.prhe
.direct_greaters
do
843 var ip
= i
.local_class
[prop
.global
]
844 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
847 #print "{prop.full_name} inherits signature from {ip.full_name}"
848 if v
.signature_builder
.params
.length
!= isig
.arity
then
849 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
852 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
853 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
856 for p
in v
.signature_builder
.params
do
857 var t
= isig
[p
.position
]
859 if p
.position
== isig
.vararg_rank
then
869 var nberr
= v
.tc
.error_count
870 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
871 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
873 #print "orig signature: {i.signature.recv} . {i.signature}"
874 #print "inh signature: {isig.recv} . {isig}"
875 #print "redef signature: {s.recv} . {s}"
877 if s
.arity
!= isig
.arity
then
878 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
880 for i
in [0..s
.arity
[ do
881 if s
[i
] != isig
[i
] then
882 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
887 var srt
= s
.return_type
888 var isrt
= isig
.return_type
889 if srt
== null and isrt
!= null then
890 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
891 else if srt
!= null and isrt
== null then
892 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
893 else if srt
!= null and isrt
!= null and not srt
< isrt
then
894 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
895 else if not s
< isig
and nberr
== v
.tc
.error_count
then
896 # Systematic fallback for conformance check
897 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
898 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
900 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
904 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
905 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
907 glob
.check_visibility
(v
, self, v
.module, true)
911 redef class AAttrPropdef
912 redef readable attr _readmethod
: MMSrcMethod
913 redef readable attr _writemethod
: MMSrcMethod
914 redef readable attr _prop
: MMSrcAttribute
916 redef meth accept_property_builder
(v
)
919 var name
= n_id
.to_symbol
920 var prop
= new MMSrcAttribute(name
, v
.local_class
, self)
922 v
.local_class
.add_src_local_property
(v
, prop
)
924 if n_readable
!= null then
925 name
= n_id
.text
.substring_from
(1).to_symbol
926 _readmethod
= new MMReadImplementationMethod(name
, v
.local_class
, self)
927 v
.local_class
.add_src_local_property
(v
, _readmethod
)
929 if n_writable
!= null then
930 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
931 _writemethod
= new MMWriteImplementationMethod(name
, v
.local_class
, self)
932 v
.local_class
.add_src_local_property
(v
, _writemethod
)
936 redef meth accept_property_verifier
(v
)
940 if n_type
!= null then
941 t
= n_type
.get_stype
(v
)
943 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
947 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
948 _prop
.signature
= signature
949 var visibility_level
= n_visibility
.level
950 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
951 if n_readable
!= null then
952 _readmethod
.signature
= signature
953 process_and_check
(v
, _readmethod
, n_readable
.n_kwredef
!= null, visibility_level
)
954 n_type
.check_visibility
(v
, _readmethod
)
956 if n_writable
!= null then
957 _writemethod
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
958 process_and_check
(v
, _writemethod
, n_writable
.n_kwredef
!= null, visibility_level
)
959 n_type
.check_visibility
(v
, _writemethod
)
963 redef meth accept_abs_syntax_visitor
(v
)
965 v
.local_property
= prop
967 v
.local_property
= null
971 redef class AMethPropdef
973 readable attr _name
: Symbol
975 redef readable attr _method
: MMMethSrcMethod
977 redef meth accept_property_builder
(v
)
980 if n_methid
== null then
981 if self isa AConcreteInitPropdef then
982 _name
= once
"init".to_symbol
984 _name
= once
"main".to_symbol
987 _name
= n_methid
.name
988 # FIXME: Add the 'unary' keyword
989 if n_methid
.name
== (once
"-".to_symbol
) then
991 if ns
isa ASignature and ns
.n_params
.length
== 0 then
992 _name
= once
"unary -".to_symbol
996 var prop
= new MMMethSrcMethod(_name
, v
.local_class
, self)
998 v
.local_class
.add_src_local_property
(v
, prop
)
1001 redef meth accept_property_verifier
(v
)
1003 v
.signature_builder
= new SignatureBuilder
1006 if v
.signature_builder
.signature
== null then
1007 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1009 _method
.signature
= v
.signature_builder
.signature
1011 var visibility_level
= 1
1012 if n_visibility
!= null and n_visibility
.level
> 1 then
1013 visibility_level
= n_visibility
.level
1015 process_and_check
(v
, _method
, n_kwredef
!= null, visibility_level
)
1016 if n_signature
!= null then n_signature
.check_visibility
(v
, _method
)
1019 redef meth accept_abs_syntax_visitor
(v
)
1021 v
.local_property
= method
1023 v
.local_property
= null
1027 redef class AMainMethPropdef
1028 redef meth process_and_check
(v
, prop
, has_redef
, visibility_level
)
1030 prop
.global
.visibility_level
= visibility_level
1031 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1032 # Disable all checks for main
1036 redef class ATypePropdef
1037 redef readable attr _prop
: MMSrcTypeProperty
1039 redef meth accept_property_builder
(v
)
1042 var name
= n_id
.to_symbol
1043 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1045 v
.local_class
.add_src_local_property
(v
, prop
)
1048 redef meth accept_property_verifier
(v
)
1051 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1052 _prop
.signature
= signature
1053 var visibility_level
= n_visibility
.level
1054 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
1057 redef meth accept_abs_syntax_visitor
(v
)
1059 v
.local_property
= prop
1061 v
.local_property
= null
1065 # Visitor used to build a full method name from multiple tokens
1066 private class MethidAccumulator
1068 readable attr _name
: Buffer = new Buffer
1072 _name
.append
(n
.text
)
1081 readable attr _name
: Symbol
1083 redef meth accept_property_builder
(v
)
1085 var accumulator
= new MethidAccumulator
1086 accumulator
.visit
(self)
1087 _name
= accumulator
.name
.to_s
.to_symbol
1092 redef class PSignature
1093 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1094 meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1097 redef class ASignature
1098 redef meth accept_property_verifier
(v
)
1101 if not v
.signature_builder
.untyped_params
.is_empty
then
1102 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1103 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1106 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1107 var pars
= new Array[MMType]
1108 for p
in v
.signature_builder
.params
do
1111 var ret
: MMType = null
1112 if n_type
!= null then
1113 ret
= n_type
.get_stype
(v
)
1115 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1116 if v
.signature_builder
.vararg_rank
>= 0 then
1117 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1119 for clos
in v
.signature_builder
.closure_decls
do
1120 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1125 redef meth check_visibility
(v
, p
)
1127 if p
.global
.visibility_level
>= 3 then return
1128 for n
in n_params
do
1129 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1131 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1136 redef readable attr _position
: Int
1138 redef readable attr _variable
: ParamVariable
1140 # The type of the parameter in signature
1141 readable writable attr _stype
: MMType
1143 redef meth accept_property_verifier
(v
)
1146 _position
= v
.signature_builder
.params
.length
1147 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1148 v
.signature_builder
.params
.add
(self)
1149 v
.signature_builder
.untyped_params
.add
(self)
1150 if n_type
!= null then
1151 var stype
= n_type
.get_stype
(v
)
1152 for p
in v
.signature_builder
.untyped_params
do
1155 if v
.signature_builder
.vararg_rank
== -1 then
1156 v
.signature_builder
.vararg_rank
= p
.position
1158 v
.error
(self, "Error: A vararg parameter is already defined.")
1160 stype
= v
.type_array
(stype
)
1162 p
.variable
.stype
= stype
1164 v
.signature_builder
.untyped_params
.clear
1168 meth is_vararg
: Bool is abstract
1172 redef meth is_vararg
do return n_dotdotdot
!= null
1175 redef class AClosureDecl
1176 redef readable attr _variable
: ClosureVariable
1178 redef meth accept_property_verifier
(v
)
1180 var old_signature_builder
= v
.signature_builder
1181 v
.signature_builder
= new SignatureBuilder
1183 var sig
= v
.signature_builder
.signature
1185 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1187 if sig
.return_type
!= null and n_kwbreak
!= null then
1188 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1191 # Add the finalizer to the closure signature
1192 var finalize_sig
= new MMSignature(new Array[MMType], null, null)
1193 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1194 sig
.closures
.add
(finalizer_clos
)
1196 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1197 v
.signature_builder
= old_signature_builder
1198 old_signature_builder
.closure_decls
.add
(self)
1199 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1204 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1205 private meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1209 redef meth check_visibility
(v
, p
)
1211 if p
.global
.visibility_level
>= 3 then return
1212 var t
= get_stype
(v
)
1213 if t
== null then return
1214 var bc
= t
.local_class
1215 if bc
== null then return
1216 if bc
.global
.visibility_level
>= 3 then
1217 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1220 n
.check_visibility
(v
, p
)
1226 redef meth accept_class_builder
(v
) do end
1227 redef meth accept_property_builder
(v
) do end
1228 redef meth accept_property_verifier
(v
) do end