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 var g
= mod
.global_class_named
(name
)
532 local_class
.new_global
533 g
= local_class
.global
535 local_class
.set_global
(g
)
539 _local_class
= local_class
540 v
.local_class_arity
= 0
541 v
.formals
= new HashMap[Symbol, MMTypeFormalParameter]
547 _local_class
.formal_dict
= v
.formals
551 redef meth accept_abs_syntax_visitor
(v
)
553 v
.local_class
= _local_class
559 redef class PClasskind
560 meth is_interface
: Bool do return false
561 meth is_universal
: Bool do return false
562 meth is_abstract
: Bool do return false
565 redef class AInterfaceClasskind
566 redef meth is_interface
do return true
568 redef class AUniversalClasskind
569 redef meth is_universal
do return true
571 redef class AAbstractClasskind
572 redef meth is_abstract
do return true
575 redef class AClassdef
578 return n_id
.to_symbol
582 return n_formaldefs
.length
584 redef meth accept_class_verifier
(v
)
587 var glob
= _local_class
.global
588 if glob
.intro
== _local_class
then
590 glob
.visibility_level
= visibility_level
591 glob
.is_interface
= n_classkind
.is_interface
592 glob
.is_abstract
= n_classkind
.is_abstract
593 glob
.is_universal
= n_classkind
.is_universal
594 if n_kwredef
!= null then
595 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
598 for c
in _local_class
.cshe
.direct_greaters
do
600 if glob
.is_interface
then
601 if cg
.is_universal
then
602 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
603 else if not cg
.is_interface
then
604 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
606 else if glob
.is_universal
then
607 if not cg
.is_interface
and not cg
.is_universal
then
608 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
611 if cg
.is_universal
then
612 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
622 glob
.check_visibility
(v
, self, v
.module)
623 if n_kwredef
== null then
624 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
628 if glob
.intro
.arity
!= _local_class
.arity
then
629 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
633 not glob
.is_interface
and n_classkind
.is_interface
or
634 not glob
.is_abstract
and n_classkind
.is_abstract
or
635 not glob
.is_universal
and n_classkind
.is_universal
637 v
.error
(self, "Redef error: cannot change kind of class {name}.")
641 redef meth visibility_level
643 return n_visibility
.level
647 redef class AMainClassdef
650 return once
"Sys".to_symbol
654 redef class ATopClassdef
657 return once
"Object".to_symbol
661 class MMSrcTypeFormalParameter
662 special MMTypeFormalParameter
663 # The associated node
664 readable attr _node
: AFormaldef
666 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
668 super(name
, pos
, local_class
)
673 redef class AFormaldef
674 # The associated formal generic parameter (MM entity)
675 attr _formal
: MMSrcTypeFormalParameter
677 redef meth accept_class_builder
(v
)
679 var name
= n_id
.to_symbol
680 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
681 _formal
= formal_type
682 v
.local_class_arity
= v
.local_class_arity
+ 1
683 v
.local_class
.register_formal
(formal_type
)
684 v
.formals
[name
] = formal_type
688 redef meth accept_class_verifier
(v
)
691 var c
= v
.local_class
692 var o
= c
.global
.intro
694 if n_type
== null then
695 _formal
.bound
= v
.module.type_any
697 _formal
.bound
= n_type
.get_stype
(v
)
700 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
701 if n_type
== null then
704 _formal
.bound
= n_type
.get_stype
(v
)
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 attr _ancestor
: MMSrcAncestor
716 redef meth accept_class_specialization_builder
(v
)
719 var c
= n_type
.get_local_class
(v
)
720 var ancestor
= new MMSrcAncestor(self, c
)
722 v
.local_class
.add_direct_parent
(ancestor
)
725 redef meth accept_class_ancestor_builder
(v
)
728 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
729 _ancestor
.inheriter
= v
.local_class
.get_type
732 redef meth accept_class_verifier
(v
)
735 n_type
.check_conform
(v
)
740 # Process and check properties of the property.
741 # * Distinguish inits and methods
742 # * Inherit or check visibility.
743 # * Check redef errors.
744 # * Check forbiden attribute definitions.
745 # * Check signature conformance.
746 private meth process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
748 if prop
.global
.intro
== prop
then
749 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
751 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
755 # The part of process_and_check when prop is an introduction
756 private meth do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
758 var glob
= prop
.global
759 var gbc
= prop
.local_class
.global
760 if v
.local_class
.global
.visibility_level
>= 3 then
761 # Method of private classes are private
764 glob
.visibility_level
= visibility_level
766 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
768 if glob
.is_attribute
then
769 if gbc
.is_interface
then
770 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
771 else if gbc
.is_universal
then
772 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
774 else if glob
.is_init
then
775 if gbc
.is_interface
then
776 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
777 else if gbc
.is_universal
then
778 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
781 if prop
.signature
== null then
783 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
784 inherit_signature
(v
, prop
, supers
)
786 if prop
.signature
!= null then
788 else if not v
.signature_builder
.untyped_params
.is_empty
then
789 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
791 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
792 if v
.signature_builder
.closure_decls
!= null then
793 for clos
in v
.signature_builder
.closure_decls
do
794 prop
.signature
.closures
.add
(clos
.variable
.closure
)
801 private meth inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
803 var s
= prop
.signature
805 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
808 if v
.signature_builder
.params
.length
!= isig
.arity
then
809 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
812 for p
in v
.signature_builder
.params
do
813 var t
= isig
[p
.position
]
815 if p
.position
== isig
.vararg_rank
then
827 # The part of process_and_check when prop is a redefinition
828 private meth do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
830 var is_init
= self isa AConcreteInitPropdef
831 var glob
= prop
.global
833 if not has_redef
then
834 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
837 if glob
.is_init
and not is_init
then
838 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
839 else if not glob
.is_init
and is_init
then
840 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
843 var s
= prop
.signature
844 #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}"
845 for i
in prop
.prhe
.direct_greaters
do
846 var ip
= i
.local_class
[prop
.global
]
847 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
850 #print "{prop.full_name} inherits signature from {ip.full_name}"
851 if v
.signature_builder
.params
.length
!= isig
.arity
then
852 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
855 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
856 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
859 for p
in v
.signature_builder
.params
do
860 var t
= isig
[p
.position
]
862 if p
.position
== isig
.vararg_rank
then
872 var nberr
= v
.tc
.error_count
873 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
874 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
876 #print "orig signature: {i.signature.recv} . {i.signature}"
877 #print "inh signature: {isig.recv} . {isig}"
878 #print "redef signature: {s.recv} . {s}"
880 if s
.arity
!= isig
.arity
then
881 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
883 for i
in [0..s
.arity
[ do
884 if s
[i
] != isig
[i
] then
885 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
890 var srt
= s
.return_type
891 var isrt
= isig
.return_type
892 if srt
== null and isrt
!= null then
893 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
894 else if srt
!= null and isrt
== null then
895 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
896 else if srt
!= null and isrt
!= null and not srt
< isrt
then
897 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
898 else if not s
< isig
and nberr
== v
.tc
.error_count
then
899 # Systematic fallback for conformance check
900 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
901 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
903 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
907 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
908 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
910 glob
.check_visibility
(v
, self, v
.module, true)
914 redef class AAttrPropdef
915 redef readable attr _readmethod
: MMSrcMethod
916 redef readable attr _writemethod
: MMSrcMethod
917 redef readable attr _prop
: MMSrcAttribute
919 redef meth accept_property_builder
(v
)
922 var name
= n_id
.to_symbol
923 var prop
= new MMSrcAttribute(name
, v
.local_class
, self)
925 v
.local_class
.add_src_local_property
(v
, prop
)
927 if n_readable
!= null then
928 name
= n_id
.text
.substring_from
(1).to_symbol
929 _readmethod
= new MMReadImplementationMethod(name
, v
.local_class
, self)
930 v
.local_class
.add_src_local_property
(v
, _readmethod
)
932 if n_writable
!= null then
933 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
934 _writemethod
= new MMWriteImplementationMethod(name
, v
.local_class
, self)
935 v
.local_class
.add_src_local_property
(v
, _writemethod
)
939 redef meth accept_property_verifier
(v
)
943 if n_type
!= null then
944 t
= n_type
.get_stype
(v
)
946 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
950 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
951 _prop
.signature
= signature
952 var visibility_level
= n_visibility
.level
953 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
954 if n_readable
!= null then
955 _readmethod
.signature
= signature
956 process_and_check
(v
, _readmethod
, n_readable
.n_kwredef
!= null, visibility_level
)
957 n_type
.check_visibility
(v
, _readmethod
)
959 if n_writable
!= null then
960 _writemethod
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
961 process_and_check
(v
, _writemethod
, n_writable
.n_kwredef
!= null, visibility_level
)
962 n_type
.check_visibility
(v
, _writemethod
)
966 redef meth accept_abs_syntax_visitor
(v
)
968 v
.local_property
= prop
970 v
.local_property
= null
974 redef class AMethPropdef
976 readable attr _name
: Symbol
978 redef readable attr _method
: MMMethSrcMethod
980 redef meth accept_property_builder
(v
)
983 if n_methid
== null then
984 if self isa AConcreteInitPropdef then
985 _name
= once
"init".to_symbol
987 _name
= once
"main".to_symbol
990 _name
= n_methid
.name
991 # FIXME: Add the 'unary' keyword
992 if n_methid
.name
== (once
"-".to_symbol
) then
994 if ns
isa ASignature and ns
.n_params
.length
== 0 then
995 _name
= once
"unary -".to_symbol
999 var prop
= new MMMethSrcMethod(_name
, v
.local_class
, self)
1001 v
.local_class
.add_src_local_property
(v
, prop
)
1004 redef meth accept_property_verifier
(v
)
1006 v
.signature_builder
= new SignatureBuilder
1009 if v
.signature_builder
.signature
== null then
1010 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1012 _method
.signature
= v
.signature_builder
.signature
1014 var visibility_level
= 1
1015 if n_visibility
!= null and n_visibility
.level
> 1 then
1016 visibility_level
= n_visibility
.level
1018 process_and_check
(v
, _method
, n_kwredef
!= null, visibility_level
)
1019 if n_signature
!= null then n_signature
.check_visibility
(v
, _method
)
1022 redef meth accept_abs_syntax_visitor
(v
)
1024 v
.local_property
= method
1026 v
.local_property
= null
1030 redef class AMainMethPropdef
1031 redef meth process_and_check
(v
, prop
, has_redef
, visibility_level
)
1033 prop
.global
.visibility_level
= visibility_level
1034 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1035 # Disable all checks for main
1039 redef class ATypePropdef
1040 redef readable attr _prop
: MMSrcTypeProperty
1042 redef meth accept_property_builder
(v
)
1045 var name
= n_id
.to_symbol
1046 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1048 v
.local_class
.add_src_local_property
(v
, prop
)
1051 redef meth accept_property_verifier
(v
)
1054 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1055 _prop
.signature
= signature
1056 var visibility_level
= n_visibility
.level
1057 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
1060 redef meth accept_abs_syntax_visitor
(v
)
1062 v
.local_property
= prop
1064 v
.local_property
= null
1068 # Visitor used to build a full method name from multiple tokens
1069 private class MethidAccumulator
1071 readable attr _name
: Buffer = new Buffer
1075 _name
.append
(n
.text
)
1084 readable attr _name
: Symbol
1086 redef meth accept_property_builder
(v
)
1088 var accumulator
= new MethidAccumulator
1089 accumulator
.visit
(self)
1090 _name
= accumulator
.name
.to_s
.to_symbol
1095 redef class PSignature
1096 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1097 meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1100 redef class ASignature
1101 redef meth accept_property_verifier
(v
)
1104 if not v
.signature_builder
.untyped_params
.is_empty
then
1105 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1106 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1109 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1110 var pars
= new Array[MMType]
1111 for p
in v
.signature_builder
.params
do
1114 var ret
: MMType = null
1115 if n_type
!= null then
1116 ret
= n_type
.get_stype
(v
)
1118 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1119 if v
.signature_builder
.vararg_rank
>= 0 then
1120 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1122 for clos
in v
.signature_builder
.closure_decls
do
1123 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1128 redef meth check_visibility
(v
, p
)
1130 if p
.global
.visibility_level
>= 3 then return
1131 for n
in n_params
do
1132 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1134 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1139 redef readable attr _position
: Int
1141 redef readable attr _variable
: ParamVariable
1143 # The type of the parameter in signature
1144 readable writable attr _stype
: MMType
1146 redef meth accept_property_verifier
(v
)
1149 _position
= v
.signature_builder
.params
.length
1150 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1151 v
.signature_builder
.params
.add
(self)
1152 v
.signature_builder
.untyped_params
.add
(self)
1153 if n_type
!= null then
1154 var stype
= n_type
.get_stype
(v
)
1155 for p
in v
.signature_builder
.untyped_params
do
1158 if v
.signature_builder
.vararg_rank
== -1 then
1159 v
.signature_builder
.vararg_rank
= p
.position
1161 v
.error
(self, "Error: A vararg parameter is already defined.")
1163 stype
= v
.type_array
(stype
)
1165 p
.variable
.stype
= stype
1167 v
.signature_builder
.untyped_params
.clear
1171 meth is_vararg
: Bool is abstract
1175 redef meth is_vararg
do return n_dotdotdot
!= null
1178 redef class AClosureDecl
1179 redef readable attr _variable
: ClosureVariable
1181 redef meth accept_property_verifier
(v
)
1183 var old_signature_builder
= v
.signature_builder
1184 v
.signature_builder
= new SignatureBuilder
1186 var sig
= v
.signature_builder
.signature
1188 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1190 if sig
.return_type
!= null and n_kwbreak
!= null then
1191 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1194 # Add the finalizer to the closure signature
1195 var finalize_sig
= new MMSignature(new Array[MMType], null, null)
1196 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1197 sig
.closures
.add
(finalizer_clos
)
1199 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1200 v
.signature_builder
= old_signature_builder
1201 old_signature_builder
.closure_decls
.add
(self)
1202 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1207 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1208 private meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1212 redef meth check_visibility
(v
, p
)
1214 if p
.global
.visibility_level
>= 3 then return
1215 var t
= get_stype
(v
)
1216 if t
== null then return
1217 var bc
= t
.local_class
1218 if bc
== null then return
1219 if bc
.global
.visibility_level
>= 3 then
1220 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1223 n
.check_visibility
(v
, p
)
1229 redef meth accept_class_builder
(v
) do end
1230 redef meth accept_property_builder
(v
) do end
1231 redef meth accept_property_verifier
(v
) do end