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 gp
= sc
.get_property_by_name
(once
("init".to_symbol
))
178 super_inits
.add
(self[gp
])
182 # Collect unassigned attributes
183 var unassigned_attributes
= new Array[MMSrcAttribute]
184 for a
in src_local_properties
do
185 if a
isa MMSrcAttribute then
187 assert n
isa AAttrPropdef
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
: 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
.global
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 meth 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 globs
= properties_by_name
[pname
]
247 if globs
.length
> 1 then
248 v
.error
(prop
.node
, "Name error: {self} inherits {globs.length} global properties named {pname}.")
251 prop
.inherit_global
(g
)
254 if prop
.global
== null then
256 prop
.global
.is_init
= prop
.is_init
261 redef class MMLocalProperty
262 private meth accept_property_visitor
(v
: AbsSyntaxVisitor)
267 redef class MMImplicitInit
268 readable attr _super_init
: MMLocalProperty = null
269 redef meth accept_property_visitor
(v
)
271 var base
: MMLocalProperty = null
272 for p
in super_inits
do
273 if p
.signature
.arity
> 0 then
277 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
284 var params
= new Array[MMType]
286 var sig
= base
.signature
287 for i
in [0..sig
.arity
[ do
291 for a
in unassigned_attributes
do
292 params
.add
(a
.signature
.return_type
)
294 signature
= new MMSignature(params
, null, local_class
.get_type
)
299 # Concrete NIT class specialization relation
302 # The related AST node
303 readable attr _node
: ASuperclass
304 redef readable attr _local_class
: MMLocalClass
306 init(n
: ASuperclass, c
: MMLocalClass)
313 ###############################################################################
315 # A pass visitor for syntax analysis.
316 # * Build the classes and attach them to global classes
317 # * Collect generic formal parameters.
318 private class ClassBuilderVisitor
319 special AbsSyntaxVisitor
320 # Current class arity
321 readable writable attr _local_class_arity
: Int
323 # Current class formal parameters
324 readable writable attr _formals
: Map[Symbol, MMTypeFormalParameter]
326 redef meth visit
(n
) do n
.accept_class_builder
(self)
330 # Another pass visitor for syntax analysis.
331 # * Build ancertors (with only class informations not the type one)
332 private class ClassSpecializationBuilderVisitor
333 special AbsSyntaxVisitor
334 redef meth visit
(n
) do n
.accept_class_specialization_builder
(self)
338 # Another pass visitor for syntax analysis.
339 # * Compute types in ancestors
340 private class ClassAncestorBuilder
341 special AbsSyntaxVisitor
342 redef meth visit
(n
) do n
.accept_class_ancestor_builder
(self)
346 # Another pass visitor for syntax analysis.
347 # * Checks classes in regard to superclasses
348 private class ClassVerifierVisitor
349 special AbsSyntaxVisitor
350 redef meth visit
(n
) do n
.accept_class_verifier
(self)
355 # Another pass visitor for syntax analysis.
356 # * Build propertie names
357 # * Build local properties and attache them to global properties
358 # * Attach bound to formal types
359 private class PropertyBuilderVisitor
360 special AbsSyntaxVisitor
361 redef meth visit
(n
) do n
.accept_property_builder
(self)
365 # Another pass pass visitor for syntax analysis.
366 # * Check property conformance
367 private class PropertyVerifierVisitor
368 special AbsSyntaxVisitor
370 # The signature currently build
371 readable writable attr _signature_builder
: SignatureBuilder
373 redef meth visit
(n
) do n
.accept_property_verifier
(self)
378 _signature_builder
= new SignatureBuilder
382 # Information about a signature currently build
383 private class SignatureBuilder
384 # Current visited parameter types
385 readable writable attr _params
: Array[PParam] = new Array[PParam]
387 # Visited parameters without type information added
388 readable writable attr _untyped_params
: Array[PParam] = new Array[PParam]
390 # Position of the current star parameter
391 readable writable attr _vararg_rank
: Int = -1
393 # Current closure declarations
394 readable writable attr _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
397 readable writable attr _signature
: MMSignature = null
400 ###############################################################################
403 private meth accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
404 private meth accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
405 private meth accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
406 private meth accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
407 private meth accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
408 private meth accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
412 # Import supermodules and compute visibility
413 meth import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
415 # Import super-modules
416 var module_names_to_import
= new Array[Symbol]
417 var module_visibility
= new HashMap[Symbol, Int]
418 var no_import
: PImport = null
419 for i
in n_imports
do
420 var n
= i
.module_name
422 module_names_to_import
.add
(n
)
423 module_visibility
[n
] = i
.visibility_level
428 if no_import
!= null then
429 if not module_names_to_import
.is_empty
then
430 tc
.error
("{no_import.locate}: Error: Top modules cannot import other modules.")
432 else if module_names_to_import
.is_empty
then
433 var stdname
= once
"standard".to_symbol
434 module_names_to_import
.add
(stdname
)
435 module_visibility
[stdname
] = 1
438 mod
.import_supers_modules
(module_names_to_import
)
440 for mname
in module_names_to_import
do
441 var level
= module_visibility
[mname
]
442 var m
= tc
.get_module
(mname
, mod
)
443 mod
.add_super_module
(m
, level
)
448 redef class APackagedecl
449 redef meth accept_class_builder
(v
)
451 if n_id
.to_symbol
!= v
.module.name
then
452 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
458 # Imported module name (or null)
459 meth module_name
: Symbol is abstract
461 # Visibility level (intrude/public/private)
462 meth visibility_level
: Int is abstract
465 redef meth module_name
467 return n_id
.to_symbol
469 redef meth visibility_level
471 return n_visibility
.level
474 redef class ANoImport
475 redef meth module_name
481 redef class PVisibility
483 meth level
: Int is abstract
485 redef class APublicVisibility
486 redef meth level
do return 1
488 redef class AProtectedVisibility
489 redef meth level
do return 2
491 redef class APrivateVisibility
492 redef meth level
do return 3
494 redef class AIntrudeVisibility
495 redef meth level
do return 0
499 redef class PClassdef
500 redef readable attr _local_class
: MMSrcLocalClass
503 meth name
: Symbol is abstract
505 # Number of formal parameters
506 meth arity
: Int do return 0
508 # Visibility of the class
509 meth visibility_level
: Int do return 1
511 redef meth accept_class_builder
(v
)
513 var local_class
: MMSrcLocalClass
515 var local_classes
= mod
.src_local_classes
516 if (local_classes
.has_key
(name
)) then
517 local_class
= local_classes
[name
]
518 if self isa AClassdef then
519 # If we are not a special implicit class then rant
520 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
523 local_class
.nodes
.add
(self)
525 local_class
= new MMSrcLocalClass(name
, self, arity
)
526 mod
.add_local_class
(local_class
)
527 local_classes
[name
] = local_class
528 var g
= mod
.global_class_named
(name
)
531 local_class
.new_global
532 g
= local_class
.global
534 local_class
.set_global
(g
)
538 _local_class
= local_class
539 v
.local_class_arity
= 0
540 v
.formals
= new HashMap[Symbol, MMTypeFormalParameter]
546 _local_class
.formal_dict
= v
.formals
550 redef meth accept_abs_syntax_visitor
(v
)
552 v
.local_class
= _local_class
558 redef class PClasskind
559 meth is_interface
: Bool do return false
560 meth is_universal
: Bool do return false
561 meth is_abstract
: Bool do return false
564 redef class AInterfaceClasskind
565 redef meth is_interface
do return true
567 redef class AUniversalClasskind
568 redef meth is_universal
do return true
570 redef class AAbstractClasskind
571 redef meth is_abstract
do return true
574 redef class AClassdef
577 return n_id
.to_symbol
581 return n_formaldefs
.length
583 redef meth accept_class_verifier
(v
)
586 var glob
= _local_class
.global
587 if glob
.intro
== _local_class
then
589 glob
.visibility_level
= visibility_level
590 glob
.is_interface
= n_classkind
.is_interface
591 glob
.is_abstract
= n_classkind
.is_abstract
592 glob
.is_universal
= n_classkind
.is_universal
593 if n_kwredef
!= null then
594 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
597 for c
in _local_class
.cshe
.direct_greaters
do
599 if glob
.is_interface
then
600 if cg
.is_universal
then
601 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
602 else if not cg
.is_interface
then
603 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
605 else if glob
.is_universal
then
606 if not cg
.is_interface
and not cg
.is_universal
then
607 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
610 if cg
.is_universal
then
611 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
621 glob
.check_visibility
(v
, self, v
.module)
622 if n_kwredef
== null then
623 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
627 if glob
.intro
.arity
!= _local_class
.arity
then
628 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
632 not glob
.is_interface
and n_classkind
.is_interface
or
633 not glob
.is_abstract
and n_classkind
.is_abstract
or
634 not glob
.is_universal
and n_classkind
.is_universal
636 v
.error
(self, "Redef error: cannot change kind of class {name}.")
640 redef meth visibility_level
642 return n_visibility
.level
646 redef class AMainClassdef
649 return once
"Sys".to_symbol
653 redef class ATopClassdef
656 return once
"Object".to_symbol
660 class MMSrcTypeFormalParameter
661 special MMTypeFormalParameter
662 # The associated node
663 readable attr _node
: AFormaldef
665 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
667 super(name
, pos
, local_class
)
672 redef class AFormaldef
673 # The associated formal generic parameter (MM entity)
674 attr _formal
: MMSrcTypeFormalParameter
676 redef meth accept_class_builder
(v
)
678 var name
= n_id
.to_symbol
679 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
680 _formal
= formal_type
681 v
.local_class_arity
= v
.local_class_arity
+ 1
682 v
.local_class
.register_formal
(formal_type
)
683 v
.formals
[name
] = formal_type
687 redef meth accept_class_verifier
(v
)
690 var c
= v
.local_class
691 var o
= c
.global
.intro
693 if n_type
== null then
694 _formal
.bound
= v
.module.type_any
696 _formal
.bound
= n_type
.get_stype
(v
)
699 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
700 if n_type
== null then
703 _formal
.bound
= n_type
.get_stype
(v
)
704 if _formal
.bound
!= ob
then
705 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
712 redef class ASuperclass
713 readable attr _ancestor
: MMSrcAncestor
715 redef meth accept_class_specialization_builder
(v
)
718 var c
= n_type
.get_local_class
(v
)
719 var ancestor
= new MMSrcAncestor(self, c
)
721 v
.local_class
.add_direct_parent
(ancestor
)
724 redef meth accept_class_ancestor_builder
(v
)
727 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
728 _ancestor
.inheriter
= v
.local_class
.get_type
731 redef meth accept_class_verifier
(v
)
734 n_type
.check_conform
(v
)
739 # Process and check properties of the property.
740 # * Distinguish inits and methods
741 # * Inherit or check visibility.
742 # * Check redef errors.
743 # * Check forbiden attribute definitions.
744 # * Check signature conformance.
745 private meth process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
747 if prop
.global
.intro
== prop
then
748 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
750 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
754 # The part of process_and_check when prop is an introduction
755 private meth do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
757 var glob
= prop
.global
758 var gbc
= prop
.local_class
.global
759 if v
.local_class
.global
.visibility_level
>= 3 then
760 # Method of private classes are private
763 glob
.visibility_level
= visibility_level
765 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
767 if glob
.is_attribute
then
768 if gbc
.is_interface
then
769 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
770 else if gbc
.is_universal
then
771 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
773 else if glob
.is_init
then
774 if gbc
.is_interface
then
775 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
776 else if gbc
.is_universal
then
777 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
780 if prop
.signature
== null then
782 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
783 inherit_signature
(v
, prop
, supers
)
785 if prop
.signature
!= null then
787 else if not v
.signature_builder
.untyped_params
.is_empty
then
788 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
790 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
791 if v
.signature_builder
.closure_decls
!= null then
792 for clos
in v
.signature_builder
.closure_decls
do
793 prop
.signature
.closures
.add
(clos
.signature
)
800 private meth 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 meth 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 for p
in v
.signature_builder
.params
do
855 var t
= isig
[p
.position
]
857 if p
.position
== isig
.vararg_rank
then
866 #print "orig signature: {i.signature.recv} . {i.signature}"
867 #print "inh signature: {isig.recv} . {isig}"
868 #print "redef signature: {s.recv} . {s}"
870 if s
.arity
!= isig
.arity
then
871 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
873 for i
in [0..s
.arity
[ do
874 if s
[i
] != isig
[i
] then
875 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
880 var srt
= s
.return_type
881 var isrt
= isig
.return_type
882 if srt
== null and isrt
!= null then
883 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
884 else if srt
!= null and isrt
== null then
885 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
886 else if srt
!= null and isrt
!= null and not srt
< isrt
then
887 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
888 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
890 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
894 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
895 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
897 glob
.check_visibility
(v
, self, v
.module, true)
901 redef class AAttrPropdef
902 redef readable attr _readmethod
: MMSrcMethod
903 redef readable attr _writemethod
: MMSrcMethod
904 redef readable attr _prop
: MMSrcAttribute
906 redef meth accept_property_builder
(v
)
909 var name
= n_id
.to_symbol
910 var prop
= new MMSrcAttribute(name
, v
.local_class
, self)
912 v
.local_class
.add_src_local_property
(v
, prop
)
914 if n_readable
!= null then
915 name
= n_id
.text
.substring_from
(1).to_symbol
916 _readmethod
= new MMReadImplementationMethod(name
, v
.local_class
, self)
917 v
.local_class
.add_src_local_property
(v
, _readmethod
)
919 if n_writable
!= null then
920 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
921 _writemethod
= new MMWriteImplementationMethod(name
, v
.local_class
, self)
922 v
.local_class
.add_src_local_property
(v
, _writemethod
)
926 redef meth accept_property_verifier
(v
)
930 if n_type
!= null then
931 t
= n_type
.get_stype
(v
)
933 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
937 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
938 _prop
.signature
= signature
939 var visibility_level
= n_visibility
.level
940 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
941 if n_readable
!= null then
942 _readmethod
.signature
= signature
943 process_and_check
(v
, _readmethod
, n_readable
.n_kwredef
!= null, visibility_level
)
944 n_type
.check_visibility
(v
, _readmethod
)
946 if n_writable
!= null then
947 _writemethod
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
948 process_and_check
(v
, _writemethod
, n_writable
.n_kwredef
!= null, visibility_level
)
949 n_type
.check_visibility
(v
, _writemethod
)
953 redef meth accept_abs_syntax_visitor
(v
)
955 v
.local_property
= prop
957 v
.local_property
= null
961 redef class AMethPropdef
963 readable attr _name
: Symbol
965 redef readable attr _method
: MMMethSrcMethod
967 redef meth accept_property_builder
(v
)
970 if n_methid
== null then
971 if self isa AConcreteInitPropdef then
972 _name
= once
"init".to_symbol
974 _name
= once
"main".to_symbol
977 _name
= n_methid
.name
978 # FIXME: Add the 'unary' keyword
979 if n_methid
.name
== (once
"-".to_symbol
) then
981 if ns
isa ASignature and ns
.n_params
.length
== 0 then
982 _name
= once
"unary -".to_symbol
986 var prop
= new MMMethSrcMethod(_name
, v
.local_class
, self)
988 v
.local_class
.add_src_local_property
(v
, prop
)
991 redef meth accept_property_verifier
(v
)
993 v
.signature_builder
= new SignatureBuilder
996 if v
.signature_builder
.signature
== null then
997 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
999 _method
.signature
= v
.signature_builder
.signature
1001 var visibility_level
= 1
1002 if n_visibility
!= null and n_visibility
.level
> 1 then
1003 visibility_level
= n_visibility
.level
1005 process_and_check
(v
, _method
, n_kwredef
!= null, visibility_level
)
1006 if n_signature
!= null then n_signature
.check_visibility
(v
, _method
)
1009 redef meth accept_abs_syntax_visitor
(v
)
1011 v
.local_property
= method
1013 v
.local_property
= null
1017 redef class AMainMethPropdef
1018 redef meth process_and_check
(v
, prop
, has_redef
, visibility_level
)
1020 prop
.global
.visibility_level
= visibility_level
1021 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1022 # Disable all checks for main
1026 redef class ATypePropdef
1027 redef readable attr _prop
: MMSrcTypeProperty
1029 redef meth accept_property_builder
(v
)
1032 var name
= n_id
.to_symbol
1033 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1035 v
.local_class
.add_src_local_property
(v
, prop
)
1038 redef meth accept_property_verifier
(v
)
1041 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1042 _prop
.signature
= signature
1043 var visibility_level
= n_visibility
.level
1044 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
1047 redef meth accept_abs_syntax_visitor
(v
)
1049 v
.local_property
= prop
1051 v
.local_property
= null
1055 # Visitor used to build a full method name from multiple tokens
1056 private class MethidAccumulator
1058 readable attr _name
: String
1062 _name
.append
(n
.text
)
1076 readable attr _name
: Symbol
1078 redef meth accept_property_builder
(v
)
1080 var accumulator
= new MethidAccumulator
1081 accumulator
.visit
(self)
1082 _name
= accumulator
.name
.to_symbol
1087 redef class PSignature
1088 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1089 meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1092 redef class ASignature
1093 redef meth accept_property_verifier
(v
)
1096 if not v
.signature_builder
.untyped_params
.is_empty
then
1097 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1098 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1101 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1102 var pars
= new Array[MMType]
1103 for p
in v
.signature_builder
.params
do
1106 var ret
: MMType = null
1107 if n_type
!= null then
1108 ret
= n_type
.get_stype
(v
)
1110 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1111 if v
.signature_builder
.vararg_rank
>= 0 then
1112 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1114 for clos
in v
.signature_builder
.closure_decls
do
1115 v
.signature_builder
.signature
.closures
.add
(clos
.signature
)
1120 redef meth check_visibility
(v
, p
)
1122 if p
.global
.visibility_level
>= 3 then return
1123 for n
in n_params
do
1124 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1126 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1131 redef readable attr _position
: Int
1133 redef readable attr _variable
: ParamVariable
1135 # The type of the parameter in signature
1136 readable writable attr _stype
: MMType
1138 redef meth accept_property_verifier
(v
)
1141 _position
= v
.signature_builder
.params
.length
1142 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1143 v
.signature_builder
.params
.add
(self)
1144 v
.signature_builder
.untyped_params
.add
(self)
1145 if n_type
!= null then
1146 var stype
= n_type
.get_stype
(v
)
1147 for p
in v
.signature_builder
.untyped_params
do
1150 if v
.signature_builder
.vararg_rank
== -1 then
1151 v
.signature_builder
.vararg_rank
= p
.position
1153 v
.error
(self, "Error: A vararg parameter is already defined.")
1155 stype
= v
.type_array
(stype
)
1157 p
.variable
.stype
= stype
1159 v
.signature_builder
.untyped_params
.clear
1163 meth is_vararg
: Bool is abstract
1167 redef meth is_vararg
do return n_dotdotdot
!= null
1170 redef class AClosureDecl
1172 redef readable attr _signature
: MMSignature
1174 redef readable attr _variable
: ClosureVariable
1176 redef meth accept_property_verifier
(v
)
1178 var old_signature_builder
= v
.signature_builder
1179 v
.signature_builder
= new SignatureBuilder
1181 var sig
= v
.signature_builder
.signature
1183 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1186 v
.signature_builder
= old_signature_builder
1187 old_signature_builder
.closure_decls
.add
(self)
1188 _variable
= new ClosureVariable(n_id
.to_symbol
, self, sig
)
1193 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1194 private meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1198 redef meth check_visibility
(v
, p
)
1200 if p
.global
.visibility_level
>= 3 then return
1201 var t
= get_stype
(v
)
1202 if t
== null then return
1203 var bc
= t
.local_class
1204 if bc
== null then return
1205 if bc
.global
.visibility_level
>= 3 then
1206 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1209 n
.check_visibility
(v
, p
)
1215 redef meth accept_class_builder
(v
) do end
1216 redef meth accept_property_builder
(v
) do end
1217 redef meth accept_property_verifier
(v
) do end