1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2008 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Build MM entity from NIT AST and check conformance of these entities.
18 # This module introduce specific MM class (MMSrcXXX) that specialize the abstract one from metamodel
24 # Class specialization hierarchy sorter
25 private class CSHSorter
26 special AbstractSorter[MMLocalClass]
27 redef fun compare
(a
, b
)
29 return a
.cshe
.rank
<=> b
.cshe
.rank
35 redef class MMSrcModule
36 # Syntax analysis and MM construction for the module
37 # Require that supermodules are processed
38 fun do_mmbuilder
(tc
: ToolContext)
40 # Import global classes
43 # Create local classes and attach them to global classes
44 var mmbv
= new ClassBuilderVisitor(tc
, self)
45 mmbv
.enter_visit
(node
)
48 if mhe
.direct_greaters
.is_empty
then
49 process_default_classes
(tc
)
52 # Import unrefined local classes and attach them to global classes
55 # Resolve classes in super clauses
56 var mmbv1
= new ClassSpecializationBuilderVisitor(tc
, self)
57 mmbv1
.enter_visit
(node
)
60 # Compute specialization relation
61 for c
in local_classes
do
62 if visibility_for
(c
.global
.intro
.module) < c
.global
.visibility_level
then
65 c
.compute_super_classes
69 # Class that we will process now are those in the hierarchy
70 # Its mean all the visible classes and their super-classes
71 # Note that leaves invisible classes are not in the 'classes' set
72 var classes
= class_specialization_hierarchy
.to_a
74 # Prepare class list to process the following in a right order
75 var sorter
= once
new CSHSorter
78 # Compute class ancestors types
79 var mmbv1b
= new ClassAncestorBuilder(tc
, self)
81 c
.accept_class_visitor
(mmbv1b
)
86 # Check class conformity
87 var mmbv1b
= new ClassVerifierVisitor(tc
, self)
89 c
.accept_class_visitor
(mmbv1b
)
93 # Property inhritance and introduction
94 var mmbv2
= new PropertyBuilderVisitor(tc
, self)
96 # Inherit global properties
97 c
.inherit_global_properties
99 # Global property introduction and redefinition
100 c
.accept_class_visitor
(mmbv2
)
102 # Default and inherited constructor if needed
103 if c
isa MMSrcLocalClass and c
.global
.intro
== c
and not c
.global
.is_universal
and not c
.global
.is_interface
then
104 c
.process_default_constructors
(mmbv2
)
107 # Note that inherited unredefined property are processed on demand latter
111 # Property signature analysis and inheritance conformance
112 var mmbv3
= new PropertyVerifierVisitor(tc
, self)
114 c
.accept_properties_visitor
(mmbv3
)
117 # Check inherited local properties
119 for g
in c
.global_properties
do
120 if visibility_for
(g
.intro
.module) < g
.visibility_level
then continue
128 # Create some primitive default classes if they do not exists
129 fun process_default_classes
(tc
: ToolContext)
131 var name
= once
("Object".to_symbol
)
132 if not has_global_class_named
(name
) then
133 var c
= new MMSrcLocalClass(self, name
, null, 0)
135 src_local_classes
[name
] = c
137 name
= once
("Bool".to_symbol
)
138 if not has_global_class_named
(name
) then
139 var c
= new MMSrcLocalClass(self, name
, null, 0)
141 src_local_classes
[name
] = c
146 redef class MMLocalClass
147 # Accept a class visitor (on class nodes)
148 private fun accept_class_visitor
(v
: AbsSyntaxVisitor)
152 # Accept a class visitor (on class properties)
153 private fun accept_properties_visitor
(v
: AbsSyntaxVisitor)
158 redef class MMSrcLocalClass
159 redef fun accept_class_visitor
(v
)
166 # Accept a class visitor (on class properties)
167 redef fun accept_properties_visitor
(v
)
173 for p
in src_local_properties
do
174 p
.accept_property_visitor
(v
)
178 # Introduce or inherit default constructors
179 private fun process_default_constructors
(v
: PropertyBuilderVisitor)
181 # Is there already a constructor ?
182 for gp
in global_properties
do
184 # Return if explicit constructor in the class
185 if gp
.intro
.local_class
== self then return
189 # Collect visible constructors in super stateful classes
190 var super_inits
= new ArraySet[MMLocalProperty]
191 var super_constructors
= new ArraySet[MMGlobalProperty]
192 for sc
in che
.direct_greaters
do
193 if sc
.global
.is_universal
or sc
.global
.is_interface
then continue
194 for gp
in sc
.global_properties
do
195 if not gp
.is_init
then continue
196 super_constructors
.add
(gp
)
198 var initname
= once
("init".to_symbol
)
199 if sc
.has_global_property_by_name
(initname
) then
200 var gp
= sc
.get_property_by_name
(initname
)
201 super_inits
.add
(self[gp
])
205 # Collect unassigned attributes
206 var unassigned_attributes
= new Array[MMSrcAttribute]
207 for a
in src_local_properties
do
208 if a
isa MMSrcAttribute then
210 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
214 if not super_constructors
.is_empty
then
215 # Select most specific classes introducing inheritable constructors
216 # Mixin classes are skipped
217 var supers
= new Array[MMLocalClass]
218 for gp
in super_constructors
do
219 var sc
= gp
.local_class
220 if supers
.has
(sc
) then continue
221 if not sc
.global
.is_mixin
then
225 supers
= che
.order
.select_smallests
(supers
)
227 # A mixin class can only have 0 or 1 most specific non-mixin superclass
228 var superclass
: nullable MMLocalClass = null # This most specific non-mixin superclass (if any)
230 if supers
.length
> 1 then
231 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(", ")}.")
233 else if supers
.length
== 1 then
234 superclass
= supers
.first
237 for gp
in super_constructors
do
238 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
239 if superclass
== null or gp
.local_class
== superclass
then
240 make_visible_an_inherited_global_property
(gp
)
243 global
.mixin_of
= superclass
.as(not null).global
# FIXME Dear! this should break!
245 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
247 # unassigned attributes, then implicit consructors are generated
248 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
249 add_src_local_property
(v
, p
)
250 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
254 # Add a source property
255 # Register it to the class and attach it to global property
256 private fun add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
258 var pname
= prop
.name
259 # Check double definition in the same class
260 if src_local_properties
.has_key
(pname
) then
261 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
264 src_local_properties
[pname
] = prop
266 # Intro or redefinition ?
267 if has_global_property_by_name
(pname
) then
268 var g
= get_property_by_name
(pname
)
269 prop
.inherit_global
(g
)
272 if not prop
.is_global_set
then
274 prop
.global
.is_init
= prop
.is_init
279 redef class MMLocalProperty
280 private fun accept_property_visitor
(v
: AbsSyntaxVisitor)
285 redef class MMImplicitInit
286 redef readable var _super_init
: nullable MMLocalProperty = null
287 redef fun accept_property_visitor
(v
)
289 var base
: nullable MMLocalProperty = null
290 for p
in super_inits
do
291 if p
.signature
.arity
> 0 then
295 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
302 var params
= new Array[MMType]
304 var sig
= base
.signature
305 for i
in [0..sig
.arity
[ do
309 for a
in unassigned_attributes
do
310 var sig
= a
.signature
311 if sig
== null then return # Broken attribute definition
312 params
.add
(sig
.return_type
.as(not null))
314 signature
= new MMSignature(params
, null, local_class
.get_type
)
319 # Concrete NIT class specialization relation
322 redef readable var _local_class
: MMLocalClass
324 init(c
: MMLocalClass)
330 ###############################################################################
332 # A pass visitor for syntax analysis.
333 # * Build the classes and attach them to global classes
334 # * Collect generic formal parameters.
335 private class ClassBuilderVisitor
336 special AbsSyntaxVisitor
337 # Current class arity
338 readable writable var _local_class_arity
: Int = 0
340 # Current class formal parameters
341 readable writable var _formals
: nullable Map[Symbol, MMTypeFormalParameter]
343 redef fun visit
(n
) do n
.accept_class_builder
(self)
347 # Another pass visitor for syntax analysis.
348 # * Build ancertors (with only class informations not the type one)
349 private class ClassSpecializationBuilderVisitor
350 special AbsSyntaxVisitor
351 redef fun visit
(n
) do n
.accept_class_specialization_builder
(self)
355 # Another pass visitor for syntax analysis.
356 # * Compute types in ancestors
357 private class ClassAncestorBuilder
358 special AbsSyntaxVisitor
359 redef fun visit
(n
) do n
.accept_class_ancestor_builder
(self)
363 # Another pass visitor for syntax analysis.
364 # * Checks classes in regard to superclasses
365 private class ClassVerifierVisitor
366 special AbsSyntaxVisitor
367 redef fun visit
(n
) do n
.accept_class_verifier
(self)
372 # Another pass visitor for syntax analysis.
373 # * Build propertie names
374 # * Build local properties and attache them to global properties
375 # * Attach bound to formal types
376 private class PropertyBuilderVisitor
377 special AbsSyntaxVisitor
378 redef fun visit
(n
) do n
.accept_property_builder
(self)
382 # Another pass pass visitor for syntax analysis.
383 # * Check property conformance
384 private class PropertyVerifierVisitor
385 special AbsSyntaxVisitor
387 # The signature currently build
388 readable writable var _signature_builder
: SignatureBuilder
390 redef fun visit
(n
) do n
.accept_property_verifier
(self)
395 _signature_builder
= new SignatureBuilder
399 # Information about a signature currently build
400 private class SignatureBuilder
401 # Current visited parameter types
402 readable writable var _params
: Array[PParam] = new Array[PParam]
404 # Visited parameters without type information added
405 readable writable var _untyped_params
: Array[PParam] = new Array[PParam]
407 # Position of the current star parameter
408 readable writable var _vararg_rank
: Int = -1
410 # Current closure declarations
411 readable writable var _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
413 # True is a problen occured durring building
414 readable writable var _has_error_occured
: Bool = false
417 readable writable var _signature
: nullable MMSignature = null
420 ###############################################################################
423 private fun accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
424 private fun accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
425 private fun accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
426 private fun accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
427 private fun accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
428 private fun accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
432 # Import supermodules and compute visibility
433 fun import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
435 # Import super-modules
436 var module_names_to_import
= new Array[Symbol]
437 var module_visibility
= new HashMap[Symbol, Int]
438 var no_import
: nullable PImport = null
439 for i
in n_imports
do
440 var n
= i
.module_name
442 module_names_to_import
.add
(n
)
443 module_visibility
[n
] = i
.visibility_level
448 if no_import
!= null then
449 if not module_names_to_import
.is_empty
then
450 tc
.error
(no_import
.location
, "Error: Top modules cannot import other modules.")
452 else if module_names_to_import
.is_empty
then
453 var stdname
= once
"standard".to_symbol
454 module_names_to_import
.add
(stdname
)
455 module_visibility
[stdname
] = 1
458 mod
.import_supers_modules
(module_names_to_import
)
460 for mname
in module_names_to_import
do
461 var level
= module_visibility
[mname
]
462 var m
= tc
.get_module
(mname
, mod
)
463 mod
.add_super_module
(m
, level
)
468 redef class APackagedecl
469 redef fun accept_class_builder
(v
)
471 if n_id
.to_symbol
!= v
.module.name
then
472 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
478 # Imported module name (or null)
479 fun module_name
: nullable Symbol is abstract
481 # Visibility level (intrude/public/private)
482 fun visibility_level
: Int is abstract
485 redef fun module_name
487 return n_id
.to_symbol
489 redef fun visibility_level
491 return n_visibility
.level
494 redef class ANoImport
495 redef fun module_name
501 redef class PVisibility
503 fun level
: Int is abstract
505 redef class APublicVisibility
506 redef fun level
do return 1
508 redef class AProtectedVisibility
509 redef fun level
do return 2
511 redef class APrivateVisibility
512 redef fun level
do return 3
514 redef class AIntrudeVisibility
515 redef fun level
do return 0
519 redef class PClassdef
520 redef fun local_class
: MMSrcLocalClass do return _local_class
.as(not null)
521 var _local_class
: nullable MMSrcLocalClass
524 fun name
: Symbol is abstract
526 # Number of formal parameters
527 fun arity
: Int do return 0
529 # Visibility of the class
530 fun visibility_level
: Int do return 1
532 redef fun accept_class_builder
(v
)
534 var local_class
: MMSrcLocalClass
536 var local_classes
= mod
.src_local_classes
537 if (local_classes
.has_key
(name
)) then
538 local_class
= local_classes
[name
]
539 if self isa AClassdef then
540 # If we are not a special implicit class then rant
541 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.location.line_start}.")
544 local_class
.nodes
.add
(self)
546 local_class
= new MMSrcLocalClass(mod
, name
, self, arity
)
547 local_classes
[name
] = local_class
548 if not mod
.has_global_class_named
(name
) then
549 local_class
.new_global
551 local_class
.set_global
(mod
.global_class_named
(name
))
555 _local_class
= local_class
556 v
.local_class_arity
= 0
557 v
.formals
= local_class
.formal_dict
566 redef fun accept_abs_syntax_visitor
(v
)
568 v
.local_class
= _local_class
574 redef class PClasskind
575 fun is_interface
: Bool do return false
576 fun is_universal
: Bool do return false
577 fun is_abstract
: Bool do return false
580 redef class AInterfaceClasskind
581 redef fun is_interface
do return true
583 redef class AUniversalClasskind
584 redef fun is_universal
do return true
586 redef class AAbstractClasskind
587 redef fun is_abstract
do return true
590 redef class AClassdef
593 return n_id
.to_symbol
597 return n_formaldefs
.length
599 redef fun accept_class_verifier
(v
)
602 var glob
= _local_class
.global
603 if glob
.intro
== _local_class
then
605 glob
.visibility_level
= visibility_level
606 glob
.is_interface
= n_classkind
.is_interface
607 glob
.is_abstract
= n_classkind
.is_abstract
608 glob
.is_universal
= n_classkind
.is_universal
609 if n_kwredef
!= null then
610 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
613 for c
in _local_class
.cshe
.direct_greaters
do
615 if glob
.is_interface
then
616 if cg
.is_universal
then
617 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
618 else if not cg
.is_interface
then
619 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
621 else if glob
.is_universal
then
622 if not cg
.is_interface
and not cg
.is_universal
then
623 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
626 if cg
.is_universal
then
627 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
637 glob
.check_visibility
(v
, self, v
.module)
638 if n_kwredef
== null then
639 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
643 if glob
.intro
.arity
!= _local_class
.arity
then
644 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
648 not glob
.is_interface
and n_classkind
.is_interface
or
649 not glob
.is_abstract
and n_classkind
.is_abstract
or
650 not glob
.is_universal
and n_classkind
.is_universal
652 v
.error
(self, "Redef error: cannot change kind of class {name}.")
656 redef fun visibility_level
658 return n_visibility
.level
662 redef class AMainClassdef
665 return once
"Sys".to_symbol
669 redef class ATopClassdef
672 return once
"Object".to_symbol
676 redef class AFormaldef
677 # The associated formal generic parameter (MM entity)
678 var _formal
: nullable MMTypeFormalParameter
680 redef fun accept_class_builder
(v
)
682 var name
= n_id
.to_symbol
683 var formal_type
= new MMTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
)
684 _formal
= formal_type
685 v
.local_class_arity
= v
.local_class_arity
+ 1
686 v
.local_class
.register_formal
(formal_type
)
687 v
.formals
[name
] = formal_type
691 redef fun accept_class_verifier
(v
)
694 var c
= v
.local_class
695 var o
= c
.global
.intro
697 if n_type
== null then
698 _formal
.bound
= v
.module.type_any
.as_nullable
700 var stype
= n_type
.get_stype
(v
)
701 if stype
== null then return
702 _formal
.bound
= stype
705 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
706 if n_type
== null then
709 var stype
= n_type
.get_stype
(v
)
710 if stype
== null then return
711 _formal
.bound
= stype
712 if _formal
.bound
!= ob
then
713 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
720 redef class ASuperclass
721 readable var _ancestor
: nullable MMSrcAncestor
723 redef fun accept_class_specialization_builder
(v
)
726 var c
= n_type
.get_local_class
(v
)
727 if c
== null then return
728 var ancestor
= new MMSrcAncestor(c
)
730 v
.local_class
.add_direct_parent
(ancestor
)
733 redef fun accept_class_ancestor_builder
(v
)
736 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
737 _ancestor
.inheriter
= v
.local_class
.get_type
740 redef fun accept_class_verifier
(v
)
743 n_type
.check_conform
(v
)
748 # Process and check properties of the property.
749 # * Distinguish inits and methods
750 # * Inherit or check visibility.
751 # * Check redef errors.
752 # * Check forbiden attribute definitions.
753 # * Check signature conformance.
754 private fun process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
756 if prop
.global
.intro
== prop
then
757 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
759 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
763 # The part of process_and_check when prop is an introduction
764 private fun do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
766 var glob
= prop
.global
767 var gbc
= prop
.local_class
.global
768 if v
.local_class
.global
.visibility_level
>= 3 then
769 # Method of private classes are private
772 glob
.visibility_level
= visibility_level
774 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
776 if glob
.is_attribute
then
777 if gbc
.is_interface
then
778 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
779 else if gbc
.is_universal
then
780 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
782 else if glob
.is_init
then
783 if gbc
.is_interface
then
784 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
785 else if gbc
.is_universal
then
786 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
789 if prop
.signature
== null then
791 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
792 inherit_signature
(v
, prop
, supers
)
794 if prop
.signature
!= null or v
.signature_builder
.has_error_occured
then
796 else if not v
.signature_builder
.untyped_params
.is_empty
then
797 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
799 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
800 for clos
in v
.signature_builder
.closure_decls
do
801 prop
.signature
.closures
.add
(clos
.variable
.closure
)
807 private fun inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
809 var s
= prop
.signature
811 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
814 if v
.signature_builder
.params
.length
!= isig
.arity
then
815 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
818 for p
in v
.signature_builder
.params
do
819 var t
= isig
[p
.position
]
821 if p
.position
== isig
.vararg_rank
then
833 # The part of process_and_check when prop is a redefinition
834 private fun do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
836 var is_init
= self isa AConcreteInitPropdef
837 var glob
= prop
.global
839 if not has_redef
then
840 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
843 if glob
.is_init
and not is_init
then
844 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
845 else if not glob
.is_init
and is_init
then
846 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
849 var s
= prop
.signature
850 #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}"
851 for i
in prop
.prhe
.direct_greaters
do
852 var ip
= i
.local_class
[prop
.global
]
853 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
856 #print "{prop.full_name} inherits signature from {ip.full_name}"
857 if v
.signature_builder
.params
.length
!= isig
.arity
then
858 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
861 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
862 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
865 for p
in v
.signature_builder
.params
do
866 var t
= isig
[p
.position
]
868 if p
.position
== isig
.vararg_rank
then
878 var nberr
= v
.tc
.error_count
879 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
880 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
882 #print "orig signature: {i.signature.recv} . {i.signature}"
883 #print "inh signature: {isig.recv} . {isig}"
884 #print "redef signature: {s.recv} . {s}"
886 if s
.arity
!= isig
.arity
then
887 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
889 for i
in [0..s
.arity
[ do
890 if s
[i
] != isig
[i
] then
891 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
896 var srt
= s
.return_type
897 var isrt
= isig
.return_type
898 if srt
== null and isrt
!= null then
899 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
900 else if srt
!= null and isrt
== null then
901 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
902 else if srt
!= null and isrt
!= null and not srt
< isrt
then
903 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
904 else if not s
< isig
and nberr
== v
.tc
.error_count
then
905 # Systematic fallback for conformance check
906 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
907 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
909 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
913 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
914 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
916 glob
.check_visibility
(v
, self, v
.module, true)
920 redef class AAttrPropdef
921 redef readable var _readmethod
: nullable MMSrcMethod
922 redef readable var _writemethod
: nullable MMSrcMethod
923 var _prop
: nullable MMSrcAttribute
924 redef fun prop
do return _prop
.as(not null)
926 redef fun accept_property_builder
(v
)
929 var name
= n_id
.to_symbol
930 var lc
= v
.local_class
931 var prop
= new MMSrcAttribute(name
, lc
, self)
933 v
.local_class
.add_src_local_property
(v
, prop
)
935 if n_readable
!= null then
936 name
= n_id
.text
.substring_from
(1).to_symbol
937 var readmethod
= new MMReadImplementationMethod(name
, lc
, self)
938 _readmethod
= readmethod
939 v
.local_class
.add_src_local_property
(v
, readmethod
)
941 if n_writable
!= null then
942 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
943 var writemethod
= new MMWriteImplementationMethod(name
, lc
, self)
944 _writemethod
= writemethod
945 v
.local_class
.add_src_local_property
(v
, writemethod
)
949 redef fun accept_property_verifier
(v
)
953 if n_type
!= null then
954 var t0
= n_type
.get_stype
(v
)
955 if t0
!= null then t
= t0
else return
957 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
962 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
963 prop
.signature
= signature
964 var visibility_level
= n_visibility
.level
965 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
966 if n_readable
!= null then
967 var m
= _readmethod
.as(not null)
968 m
.signature
= signature
969 process_and_check
(v
, m
, n_readable
.n_kwredef
!= null, visibility_level
)
970 n_type
.check_visibility
(v
, m
)
972 if n_writable
!= null then
973 var m
= _writemethod
.as(not null)
974 m
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
975 process_and_check
(v
, m
, n_writable
.n_kwredef
!= null, visibility_level
)
976 n_type
.check_visibility
(v
, m
)
980 redef fun accept_abs_syntax_visitor
(v
)
982 v
.local_property
= _prop
984 v
.local_property
= null
988 redef class AMethPropdef
990 readable var _name
: nullable Symbol
992 var _method
: nullable MMMethSrcMethod
993 redef fun method
do return _method
.as(not null)
995 redef fun accept_property_builder
(v
)
999 if n_methid
== null then
1000 if self isa AConcreteInitPropdef then
1001 name
= once
"init".to_symbol
1003 name
= once
"main".to_symbol
1006 name
= n_methid
.name
.as(not null)
1007 # FIXME: Add the 'unary' keyword
1008 if n_methid
.name
== (once
"-".to_symbol
) then
1009 var ns
= n_signature
1010 if ns
isa ASignature and ns
.n_params
.length
== 0 then
1011 name
= once
"unary -".to_symbol
1016 var prop
= new MMMethSrcMethod(name
, v
.local_class
, self)
1018 v
.local_class
.add_src_local_property
(v
, prop
)
1021 redef fun accept_property_verifier
(v
)
1023 v
.signature_builder
= new SignatureBuilder
1026 if v
.signature_builder
.has_error_occured
then return
1028 if v
.signature_builder
.signature
== null then
1029 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1031 method
.signature
= v
.signature_builder
.signature
.as(not null)
1033 var visibility_level
= 1
1034 if n_visibility
!= null and n_visibility
.level
> 1 then
1035 visibility_level
= n_visibility
.level
1037 process_and_check
(v
, method
, n_kwredef
!= null, visibility_level
)
1038 if n_signature
!= null then n_signature
.check_visibility
(v
, method
)
1041 redef fun accept_abs_syntax_visitor
(v
)
1043 v
.local_property
= _method
1045 v
.local_property
= null
1049 redef class AMainMethPropdef
1050 redef fun process_and_check
(v
, prop
, has_redef
, visibility_level
)
1052 prop
.global
.visibility_level
= visibility_level
1053 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1054 # Disable all checks for main
1058 redef class ATypePropdef
1059 redef fun prop
do return _prop
.as(not null)
1060 var _prop
: nullable MMSrcTypeProperty
1062 redef fun accept_property_builder
(v
)
1065 var name
= n_id
.to_symbol
1066 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1068 v
.local_class
.add_src_local_property
(v
, prop
)
1071 redef fun accept_property_verifier
(v
)
1074 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1075 prop
.signature
= signature
1076 var visibility_level
= n_visibility
.level
1077 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
1080 redef fun accept_abs_syntax_visitor
(v
)
1082 v
.local_property
= _prop
1084 v
.local_property
= null
1088 # Visitor used to build a full method name from multiple tokens
1089 private class MethidAccumulator
1091 readable var _name
: Buffer = new Buffer
1095 _name
.append
(n
.text
)
1104 readable var _name
: nullable Symbol
1106 redef fun accept_property_builder
(v
)
1108 var accumulator
= new MethidAccumulator
1109 accumulator
.enter_visit
(self)
1110 _name
= accumulator
.name
.to_s
.to_symbol
1115 redef class PSignature
1116 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1117 fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1120 redef class ASignature
1121 redef fun accept_property_verifier
(v
)
1124 if v
.signature_builder
.has_error_occured
then
1126 else if not v
.signature_builder
.untyped_params
.is_empty
then
1127 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1128 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1131 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1132 var pars
= new Array[MMType]
1133 for p
in v
.signature_builder
.params
do
1134 pars
.add
(p
.stype
.as(not null))
1136 var ret
: nullable MMType = null
1137 if n_type
!= null then
1138 ret
= n_type
.get_stype
(v
)
1140 v
.signature_builder
.has_error_occured
= true
1144 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1145 if v
.signature_builder
.vararg_rank
>= 0 then
1146 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1148 for clos
in v
.signature_builder
.closure_decls
do
1149 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1154 redef fun check_visibility
(v
, p
)
1156 if p
.global
.visibility_level
>= 3 then return
1157 for n
in n_params
do
1158 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1160 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1165 redef readable var _position
: Int = 0
1167 redef fun variable
: ParamVariable do return _variable
.as(not null)
1168 var _variable
: nullable ParamVariable
1170 # The type of the parameter in signature
1171 readable writable var _stype
: nullable MMType
1173 redef fun accept_property_verifier
(v
)
1176 _position
= v
.signature_builder
.params
.length
1177 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1178 v
.signature_builder
.params
.add
(self)
1179 v
.signature_builder
.untyped_params
.add
(self)
1180 if n_type
!= null then
1181 var stype
= n_type
.get_stype
(v
)
1182 if stype
== null then
1183 v
.signature_builder
.has_error_occured
= true
1186 for p
in v
.signature_builder
.untyped_params
do
1189 if v
.signature_builder
.vararg_rank
== -1 then
1190 v
.signature_builder
.vararg_rank
= p
.position
1192 v
.error
(self, "Error: A vararg parameter is already defined.")
1194 stype
= v
.type_array
(stype
)
1196 p
.variable
.stype
= stype
1198 v
.signature_builder
.untyped_params
.clear
1202 fun is_vararg
: Bool is abstract
1206 redef fun is_vararg
do return n_dotdotdot
!= null
1209 redef class AClosureDecl
1210 redef readable var _position
: Int = 0
1212 redef fun variable
: ClosureVariable do return _variable
.as(not null)
1213 var _variable
: nullable ClosureVariable
1215 redef fun accept_property_verifier
(v
)
1217 var old_signature_builder
= v
.signature_builder
1218 v
.signature_builder
= new SignatureBuilder
1220 if v
.signature_builder
.has_error_occured
then
1223 var sig
= v
.signature_builder
.signature
1225 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1227 if sig
.return_type
!= null and n_kwbreak
!= null then
1228 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1231 # Add the finalizer to the closure signature
1232 var finalize_sig
= new MMSignature(new Array[MMType], null, v
.module.type_any
) # FIXME should be no receiver
1233 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1234 sig
.closures
.add
(finalizer_clos
)
1236 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1237 v
.signature_builder
= old_signature_builder
1238 _position
= old_signature_builder
.closure_decls
.length
1239 old_signature_builder
.closure_decls
.add
(self)
1240 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1245 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1246 private fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1250 redef fun check_visibility
(v
, p
)
1252 if p
.global
.visibility_level
>= 3 then return
1253 var t
= get_stype
(v
)
1254 if t
== null then return
1255 var bc
= t
.local_class
1256 if bc
.global
.visibility_level
>= 3 then
1257 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1260 n
.check_visibility
(v
, p
)
1266 redef fun accept_class_builder
(v
) do end
1267 redef fun accept_property_builder
(v
) do end
1268 redef fun accept_property_verifier
(v
) do end