1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2008 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Build MM entity from NIT AST and check conformance of these entities.
18 # This module introduce specific MM class (MMSrcXXX) that specialize the abstract one from metamodel
24 # Class specialization hierarchy sorter
25 private class CSHSorter
26 special AbstractSorter[MMLocalClass]
27 redef fun compare
(a
, b
)
29 return a
.cshe
.rank
<=> b
.cshe
.rank
35 redef class MMSrcModule
36 # Syntax analysis and MM construction for the module
37 # Require that supermodules are processed
38 fun do_mmbuilder
(tc
: ToolContext)
40 # Import global classes
43 # Create local classes and attach them to global classes
44 var mmbv
= new ClassBuilderVisitor(tc
, self)
46 if tc
.error_count
> 0 then exit
(1)
48 # Import unrefined local classes and attach them to global classes
51 # Resolve classes in super clauses
52 var mmbv1
= new ClassSpecializationBuilderVisitor(tc
, self)
54 if tc
.error_count
> 0 then exit
(1)
56 # Compute specialization relation
57 for c
in local_classes
do
58 if visibility_for
(c
.global
.intro
.module) < c
.global
.visibility_level
then
61 c
.compute_super_classes
64 # Class that we will process now are those in the hierarchy
65 # Its mean all the visible classes and their super-classes
66 # Note that leaves invisible classes are not in the 'classes' set
67 var classes
= class_specialization_hierarchy
.to_a
69 # Prepare class list to process the following in a right order
70 var sorter
= once
new CSHSorter
73 # Compute class ancestors types
74 var mmbv1b
= new ClassAncestorBuilder(tc
, self)
76 c
.accept_class_visitor
(mmbv1b
)
79 if tc
.error_count
> 0 then exit
(1)
81 # Check class conformity
82 var mmbv1b
= new ClassVerifierVisitor(tc
, self)
84 c
.accept_class_visitor
(mmbv1b
)
86 if tc
.error_count
> 0 then exit
(1)
88 # Property inhritance and introduction
89 var mmbv2
= new PropertyBuilderVisitor(tc
, self)
91 # Inherit global properties
92 c
.inherit_global_properties
94 # Global property introduction and redefinition
95 c
.accept_class_visitor
(mmbv2
)
97 # Default and inherited constructor if needed
98 if c
isa MMSrcLocalClass and c
.global
.intro
== c
and not c
.global
.is_universal
and not c
.global
.is_interface
then
99 c
.process_default_constructors
(mmbv2
)
102 # Note that inherited unredefined property are processed on demand latter
104 if tc
.error_count
> 0 then exit
(1)
106 # Property signature analysis and inheritance conformance
107 var mmbv3
= new PropertyVerifierVisitor(tc
, self)
109 c
.accept_properties_visitor
(mmbv3
)
112 # Check inherited local properties
114 for g
in c
.global_properties
do
115 if visibility_for
(g
.intro
.module) < g
.visibility_level
then continue
120 if tc
.error_count
> 0 then exit
(1)
124 redef class MMLocalClass
125 # Accept a class visitor (on class nodes)
126 private fun accept_class_visitor
(v
: AbsSyntaxVisitor)
130 # Accept a class visitor (on class properties)
131 private fun accept_properties_visitor
(v
: AbsSyntaxVisitor)
136 redef class MMSrcLocalClass
137 redef fun accept_class_visitor
(v
)
144 # Accept a class visitor (on class properties)
145 redef fun accept_properties_visitor
(v
)
151 for p
in src_local_properties
do
152 p
.accept_property_visitor
(v
)
156 # Introduce or inherit default constructors
157 private fun process_default_constructors
(v
: PropertyBuilderVisitor)
159 # Is there already a constructor ?
160 for gp
in global_properties
do
162 # Return if explicit constructor in the class
163 if gp
.intro
.local_class
== self then return
167 # Collect visible constructors in super stateful classes
168 var super_inits
= new ArraySet[MMLocalProperty]
169 var super_constructors
= new ArraySet[MMGlobalProperty]
170 for sc
in che
.direct_greaters
do
171 if sc
.global
.is_universal
or sc
.global
.is_interface
then continue
172 for gp
in sc
.global_properties
do
173 if not gp
.is_init
then continue
174 super_constructors
.add
(gp
)
176 var initname
= once
("init".to_symbol
)
177 if sc
.has_global_property_by_name
(initname
) then
178 var gp
= sc
.get_property_by_name
(initname
)
179 super_inits
.add
(self[gp
])
183 # Collect unassigned attributes
184 var unassigned_attributes
= new Array[MMSrcAttribute]
185 for a
in src_local_properties
do
186 if a
isa MMSrcAttribute then
188 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
192 if not super_constructors
.is_empty
then
193 # Select most specific classes introducing inheritable constructors
194 # Mixin classes are skipped
195 var supers
= new Array[MMLocalClass]
196 for gp
in super_constructors
do
197 var sc
= gp
.local_class
198 if supers
.has
(sc
) then continue
199 if not sc
.global
.is_mixin
then
203 supers
= che
.order
.select_smallests
(supers
)
205 # A mixin class can only have 0 or 1 most specific non-mixin superclass
206 var superclass
: nullable MMLocalClass = null # This most specific non-mixin superclass (if any)
208 if supers
.length
> 1 then
209 v
.error
(nodes
.first
, "Error: Explicit constructor required in {self} since multiple inheritance of constructor is forbiden. Conflicting classes are {supers.join(", ")}. Costructors are {super_constructors.join(", ")}.")
211 else if supers
.length
== 1 then
212 superclass
= supers
.first
215 for gp
in super_constructors
do
216 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
217 if superclass
== null or gp
.local_class
== superclass
then
218 make_visible_an_inherited_global_property
(gp
)
221 global
.mixin_of
= superclass
.as(not null).global
# FIXME Dear! this should break!
223 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
225 # unassigned attributes, then implicit consructors are generated
226 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
227 add_src_local_property
(v
, p
)
228 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
232 # Add a source property
233 # Register it to the class and attach it to global property
234 private fun add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
236 var pname
= prop
.name
237 # Check double definition in the same class
238 if src_local_properties
.has_key
(pname
) then
239 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
242 src_local_properties
[pname
] = prop
244 # Intro or redefinition ?
245 if has_global_property_by_name
(pname
) then
246 var g
= get_property_by_name
(pname
)
247 prop
.inherit_global
(g
)
250 if not prop
.is_global_set
then
252 prop
.global
.is_init
= prop
.is_init
257 redef class MMLocalProperty
258 private fun accept_property_visitor
(v
: AbsSyntaxVisitor)
263 redef class MMImplicitInit
264 readable var _super_init
: nullable MMLocalProperty = null
265 redef fun accept_property_visitor
(v
)
267 var base
: nullable MMLocalProperty = null
268 for p
in super_inits
do
269 if p
.signature
.arity
> 0 then
273 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
280 var params
= new Array[MMType]
282 var sig
= base
.signature
283 for i
in [0..sig
.arity
[ do
287 for a
in unassigned_attributes
do
288 var sig
= a
.signature
289 if sig
== null then return # Broken attribute definition
290 params
.add
(sig
.return_type
.as(not null))
292 signature
= new MMSignature(params
, null, local_class
.get_type
)
297 # Concrete NIT class specialization relation
300 # The related AST node
301 readable var _node
: ASuperclass
302 redef readable var _local_class
: MMLocalClass
304 init(n
: ASuperclass, c
: MMLocalClass)
311 ###############################################################################
313 # A pass visitor for syntax analysis.
314 # * Build the classes and attach them to global classes
315 # * Collect generic formal parameters.
316 private class ClassBuilderVisitor
317 special AbsSyntaxVisitor
318 # Current class arity
319 readable writable var _local_class_arity
: Int = 0
321 # Current class formal parameters
322 readable writable var _formals
: nullable Map[Symbol, MMTypeFormalParameter]
324 redef fun visit
(n
) do n
.accept_class_builder
(self)
328 # Another pass visitor for syntax analysis.
329 # * Build ancertors (with only class informations not the type one)
330 private class ClassSpecializationBuilderVisitor
331 special AbsSyntaxVisitor
332 redef fun visit
(n
) do n
.accept_class_specialization_builder
(self)
336 # Another pass visitor for syntax analysis.
337 # * Compute types in ancestors
338 private class ClassAncestorBuilder
339 special AbsSyntaxVisitor
340 redef fun visit
(n
) do n
.accept_class_ancestor_builder
(self)
344 # Another pass visitor for syntax analysis.
345 # * Checks classes in regard to superclasses
346 private class ClassVerifierVisitor
347 special AbsSyntaxVisitor
348 redef fun visit
(n
) do n
.accept_class_verifier
(self)
353 # Another pass visitor for syntax analysis.
354 # * Build propertie names
355 # * Build local properties and attache them to global properties
356 # * Attach bound to formal types
357 private class PropertyBuilderVisitor
358 special AbsSyntaxVisitor
359 redef fun visit
(n
) do n
.accept_property_builder
(self)
363 # Another pass pass visitor for syntax analysis.
364 # * Check property conformance
365 private class PropertyVerifierVisitor
366 special AbsSyntaxVisitor
368 # The signature currently build
369 readable writable var _signature_builder
: SignatureBuilder
371 redef fun visit
(n
) do n
.accept_property_verifier
(self)
376 _signature_builder
= new SignatureBuilder
380 # Information about a signature currently build
381 private class SignatureBuilder
382 # Current visited parameter types
383 readable writable var _params
: Array[PParam] = new Array[PParam]
385 # Visited parameters without type information added
386 readable writable var _untyped_params
: Array[PParam] = new Array[PParam]
388 # Position of the current star parameter
389 readable writable var _vararg_rank
: Int = -1
391 # Current closure declarations
392 readable writable var _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
395 readable writable var _signature
: nullable MMSignature = null
398 ###############################################################################
401 private fun accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
402 private fun accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
403 private fun accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
404 private fun accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
405 private fun accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
406 private fun accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
410 # Import supermodules and compute visibility
411 fun import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
413 # Import super-modules
414 var module_names_to_import
= new Array[Symbol]
415 var module_visibility
= new HashMap[Symbol, Int]
416 var no_import
: nullable PImport = null
417 for i
in n_imports
do
418 var n
= i
.module_name
420 module_names_to_import
.add
(n
)
421 module_visibility
[n
] = i
.visibility_level
426 if no_import
!= null then
427 if not module_names_to_import
.is_empty
then
428 tc
.error
("{no_import.locate}: Error: Top modules cannot import other modules.")
430 else if module_names_to_import
.is_empty
then
431 var stdname
= once
"standard".to_symbol
432 module_names_to_import
.add
(stdname
)
433 module_visibility
[stdname
] = 1
436 mod
.import_supers_modules
(module_names_to_import
)
438 for mname
in module_names_to_import
do
439 var level
= module_visibility
[mname
]
440 var m
= tc
.get_module
(mname
, mod
)
441 mod
.add_super_module
(m
, level
)
446 redef class APackagedecl
447 redef fun accept_class_builder
(v
)
449 if n_id
.to_symbol
!= v
.module.name
then
450 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
456 # Imported module name (or null)
457 fun module_name
: nullable Symbol is abstract
459 # Visibility level (intrude/public/private)
460 fun visibility_level
: Int is abstract
463 redef fun module_name
465 return n_id
.to_symbol
467 redef fun visibility_level
469 return n_visibility
.level
472 redef class ANoImport
473 redef fun module_name
479 redef class PVisibility
481 fun level
: Int is abstract
483 redef class APublicVisibility
484 redef fun level
do return 1
486 redef class AProtectedVisibility
487 redef fun level
do return 2
489 redef class APrivateVisibility
490 redef fun level
do return 3
492 redef class AIntrudeVisibility
493 redef fun level
do return 0
497 redef class PClassdef
498 redef fun local_class
: MMSrcLocalClass do return _local_class
.as(not null)
499 var _local_class
: nullable MMSrcLocalClass
502 fun name
: Symbol is abstract
504 # Number of formal parameters
505 fun arity
: Int do return 0
507 # Visibility of the class
508 fun visibility_level
: Int do return 1
510 redef fun accept_class_builder
(v
)
512 var local_class
: MMSrcLocalClass
514 var local_classes
= mod
.src_local_classes
515 if (local_classes
.has_key
(name
)) then
516 local_class
= local_classes
[name
]
517 if self isa AClassdef then
518 # If we are not a special implicit class then rant
519 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
522 local_class
.nodes
.add
(self)
524 local_class
= new MMSrcLocalClass(mod
, name
, self, arity
)
525 local_classes
[name
] = local_class
526 if not mod
.has_global_class_named
(name
) then
527 local_class
.new_global
529 local_class
.set_global
(mod
.global_class_named
(name
))
533 _local_class
= local_class
534 v
.local_class_arity
= 0
535 v
.formals
= local_class
.formal_dict
544 redef fun accept_abs_syntax_visitor
(v
)
546 v
.local_class
= _local_class
552 redef class PClasskind
553 fun is_interface
: Bool do return false
554 fun is_universal
: Bool do return false
555 fun is_abstract
: Bool do return false
558 redef class AInterfaceClasskind
559 redef fun is_interface
do return true
561 redef class AUniversalClasskind
562 redef fun is_universal
do return true
564 redef class AAbstractClasskind
565 redef fun is_abstract
do return true
568 redef class AClassdef
571 return n_id
.to_symbol
575 return n_formaldefs
.length
577 redef fun accept_class_verifier
(v
)
580 var glob
= _local_class
.global
581 if glob
.intro
== _local_class
then
583 glob
.visibility_level
= visibility_level
584 glob
.is_interface
= n_classkind
.is_interface
585 glob
.is_abstract
= n_classkind
.is_abstract
586 glob
.is_universal
= n_classkind
.is_universal
587 if n_kwredef
!= null then
588 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
591 for c
in _local_class
.cshe
.direct_greaters
do
593 if glob
.is_interface
then
594 if cg
.is_universal
then
595 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
596 else if not cg
.is_interface
then
597 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
599 else if glob
.is_universal
then
600 if not cg
.is_interface
and not cg
.is_universal
then
601 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
604 if cg
.is_universal
then
605 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
615 glob
.check_visibility
(v
, self, v
.module)
616 if n_kwredef
== null then
617 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
621 if glob
.intro
.arity
!= _local_class
.arity
then
622 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
626 not glob
.is_interface
and n_classkind
.is_interface
or
627 not glob
.is_abstract
and n_classkind
.is_abstract
or
628 not glob
.is_universal
and n_classkind
.is_universal
630 v
.error
(self, "Redef error: cannot change kind of class {name}.")
634 redef fun visibility_level
636 return n_visibility
.level
640 redef class AMainClassdef
643 return once
"Sys".to_symbol
647 redef class ATopClassdef
650 return once
"Object".to_symbol
654 class MMSrcTypeFormalParameter
655 special MMTypeFormalParameter
656 # The associated node
657 readable var _node
: AFormaldef
659 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
661 super(name
, pos
, local_class
)
666 redef class AFormaldef
667 # The associated formal generic parameter (MM entity)
668 var _formal
: nullable MMSrcTypeFormalParameter
670 redef fun accept_class_builder
(v
)
672 var name
= n_id
.to_symbol
673 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
674 _formal
= formal_type
675 v
.local_class_arity
= v
.local_class_arity
+ 1
676 v
.local_class
.register_formal
(formal_type
)
677 v
.formals
[name
] = formal_type
681 redef fun accept_class_verifier
(v
)
684 var c
= v
.local_class
685 var o
= c
.global
.intro
687 if n_type
== null then
688 _formal
.bound
= v
.module.type_any
.as_nullable
690 _formal
.bound
= n_type
.get_stype
(v
).as(not null)
693 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
694 if n_type
== null then
697 _formal
.bound
= n_type
.get_stype
(v
).as(not null)
698 if _formal
.bound
!= ob
then
699 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
706 redef class ASuperclass
707 readable var _ancestor
: nullable MMSrcAncestor
709 redef fun accept_class_specialization_builder
(v
)
712 var c
= n_type
.get_local_class
(v
)
713 if c
== null then return
714 var ancestor
= new MMSrcAncestor(self, c
)
716 v
.local_class
.add_direct_parent
(ancestor
)
719 redef fun accept_class_ancestor_builder
(v
)
722 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
723 _ancestor
.inheriter
= v
.local_class
.get_type
726 redef fun accept_class_verifier
(v
)
729 n_type
.check_conform
(v
)
734 # Process and check properties of the property.
735 # * Distinguish inits and methods
736 # * Inherit or check visibility.
737 # * Check redef errors.
738 # * Check forbiden attribute definitions.
739 # * Check signature conformance.
740 private fun process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
742 if prop
.global
.intro
== prop
then
743 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
745 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
749 # The part of process_and_check when prop is an introduction
750 private fun do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
752 var glob
= prop
.global
753 var gbc
= prop
.local_class
.global
754 if v
.local_class
.global
.visibility_level
>= 3 then
755 # Method of private classes are private
758 glob
.visibility_level
= visibility_level
760 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
762 if glob
.is_attribute
then
763 if gbc
.is_interface
then
764 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
765 else if gbc
.is_universal
then
766 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
768 else if glob
.is_init
then
769 if gbc
.is_interface
then
770 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
771 else if gbc
.is_universal
then
772 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
775 if prop
.signature
== null then
777 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
778 inherit_signature
(v
, prop
, supers
)
780 if prop
.signature
!= null then
782 else if not v
.signature_builder
.untyped_params
.is_empty
then
783 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
785 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
786 for clos
in v
.signature_builder
.closure_decls
do
787 prop
.signature
.closures
.add
(clos
.variable
.closure
)
793 private fun inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
795 var s
= prop
.signature
797 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
800 if v
.signature_builder
.params
.length
!= isig
.arity
then
801 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
804 for p
in v
.signature_builder
.params
do
805 var t
= isig
[p
.position
]
807 if p
.position
== isig
.vararg_rank
then
819 # The part of process_and_check when prop is a redefinition
820 private fun do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
822 var is_init
= self isa AConcreteInitPropdef
823 var glob
= prop
.global
825 if not has_redef
then
826 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
829 if glob
.is_init
and not is_init
then
830 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
831 else if not glob
.is_init
and is_init
then
832 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
835 var s
= prop
.signature
836 #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}"
837 for i
in prop
.prhe
.direct_greaters
do
838 var ip
= i
.local_class
[prop
.global
]
839 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
842 #print "{prop.full_name} inherits signature from {ip.full_name}"
843 if v
.signature_builder
.params
.length
!= isig
.arity
then
844 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
847 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
848 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
851 for p
in v
.signature_builder
.params
do
852 var t
= isig
[p
.position
]
854 if p
.position
== isig
.vararg_rank
then
864 var nberr
= v
.tc
.error_count
865 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
866 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
868 #print "orig signature: {i.signature.recv} . {i.signature}"
869 #print "inh signature: {isig.recv} . {isig}"
870 #print "redef signature: {s.recv} . {s}"
872 if s
.arity
!= isig
.arity
then
873 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
875 for i
in [0..s
.arity
[ do
876 if s
[i
] != isig
[i
] then
877 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
882 var srt
= s
.return_type
883 var isrt
= isig
.return_type
884 if srt
== null and isrt
!= null then
885 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
886 else if srt
!= null and isrt
== null then
887 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
888 else if srt
!= null and isrt
!= null and not srt
< isrt
then
889 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
890 else if not s
< isig
and nberr
== v
.tc
.error_count
then
891 # Systematic fallback for conformance check
892 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
893 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
895 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
899 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
900 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
902 glob
.check_visibility
(v
, self, v
.module, true)
906 redef class AAttrPropdef
907 redef readable var _readmethod
: nullable MMSrcMethod
908 redef readable var _writemethod
: nullable MMSrcMethod
909 var _prop
: nullable MMSrcAttribute
910 redef fun prop
do return _prop
.as(not null)
912 redef fun accept_property_builder
(v
)
915 var name
= n_id
.to_symbol
916 var lc
= v
.local_class
917 var prop
= new MMSrcAttribute(name
, lc
, self)
919 v
.local_class
.add_src_local_property
(v
, prop
)
921 if n_readable
!= null then
922 name
= n_id
.text
.substring_from
(1).to_symbol
923 var readmethod
= new MMReadImplementationMethod(name
, lc
, self)
924 _readmethod
= readmethod
925 v
.local_class
.add_src_local_property
(v
, readmethod
)
927 if n_writable
!= null then
928 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
929 var writemethod
= new MMWriteImplementationMethod(name
, lc
, self)
930 _writemethod
= writemethod
931 v
.local_class
.add_src_local_property
(v
, writemethod
)
935 redef fun accept_property_verifier
(v
)
939 if n_type
!= null then
940 var t0
= n_type
.get_stype
(v
)
941 if t0
!= null then t
= t0
else return
943 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
948 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
949 prop
.signature
= signature
950 var visibility_level
= n_visibility
.level
951 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
952 if n_readable
!= null then
953 var m
= _readmethod
.as(not null)
954 m
.signature
= signature
955 process_and_check
(v
, m
, n_readable
.n_kwredef
!= null, visibility_level
)
956 n_type
.check_visibility
(v
, m
)
958 if n_writable
!= null then
959 var m
= _writemethod
.as(not null)
960 m
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
961 process_and_check
(v
, m
, n_writable
.n_kwredef
!= null, visibility_level
)
962 n_type
.check_visibility
(v
, m
)
966 redef fun accept_abs_syntax_visitor
(v
)
968 v
.local_property
= _prop
970 v
.local_property
= null
974 redef class AMethPropdef
976 readable var _name
: nullable Symbol
978 var _method
: nullable MMMethSrcMethod
979 redef fun method
do return _method
.as(not null)
981 redef fun accept_property_builder
(v
)
985 if n_methid
== null then
986 if self isa AConcreteInitPropdef then
987 name
= once
"init".to_symbol
989 name
= once
"main".to_symbol
992 name
= n_methid
.name
.as(not null)
993 # FIXME: Add the 'unary' keyword
994 if n_methid
.name
== (once
"-".to_symbol
) then
996 if ns
isa ASignature and ns
.n_params
.length
== 0 then
997 name
= once
"unary -".to_symbol
1002 var prop
= new MMMethSrcMethod(name
, v
.local_class
, self)
1004 v
.local_class
.add_src_local_property
(v
, prop
)
1007 redef fun accept_property_verifier
(v
)
1009 v
.signature_builder
= new SignatureBuilder
1012 if v
.signature_builder
.signature
== null then
1013 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1015 method
.signature
= v
.signature_builder
.signature
.as(not null)
1017 var visibility_level
= 1
1018 if n_visibility
!= null and n_visibility
.level
> 1 then
1019 visibility_level
= n_visibility
.level
1021 process_and_check
(v
, method
, n_kwredef
!= null, visibility_level
)
1022 if n_signature
!= null then n_signature
.check_visibility
(v
, method
)
1025 redef fun accept_abs_syntax_visitor
(v
)
1027 v
.local_property
= _method
1029 v
.local_property
= null
1033 redef class AMainMethPropdef
1034 redef fun process_and_check
(v
, prop
, has_redef
, visibility_level
)
1036 prop
.global
.visibility_level
= visibility_level
1037 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1038 # Disable all checks for main
1042 redef class ATypePropdef
1043 redef fun prop
do return _prop
.as(not null)
1044 var _prop
: nullable MMSrcTypeProperty
1046 redef fun accept_property_builder
(v
)
1049 var name
= n_id
.to_symbol
1050 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1052 v
.local_class
.add_src_local_property
(v
, prop
)
1055 redef fun accept_property_verifier
(v
)
1058 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1059 prop
.signature
= signature
1060 var visibility_level
= n_visibility
.level
1061 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
1064 redef fun accept_abs_syntax_visitor
(v
)
1066 v
.local_property
= _prop
1068 v
.local_property
= null
1072 # Visitor used to build a full method name from multiple tokens
1073 private class MethidAccumulator
1075 readable var _name
: Buffer = new Buffer
1079 _name
.append
(n
.text
)
1088 readable var _name
: nullable Symbol
1090 redef fun accept_property_builder
(v
)
1092 var accumulator
= new MethidAccumulator
1093 accumulator
.visit
(self)
1094 _name
= accumulator
.name
.to_s
.to_symbol
1099 redef class PSignature
1100 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1101 fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1104 redef class ASignature
1105 redef fun accept_property_verifier
(v
)
1108 if not v
.signature_builder
.untyped_params
.is_empty
then
1109 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1110 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1113 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1114 var pars
= new Array[MMType]
1115 for p
in v
.signature_builder
.params
do
1116 pars
.add
(p
.stype
.as(not null))
1118 var ret
: nullable MMType = null
1119 if n_type
!= null then
1120 ret
= n_type
.get_stype
(v
)
1122 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1123 if v
.signature_builder
.vararg_rank
>= 0 then
1124 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1126 for clos
in v
.signature_builder
.closure_decls
do
1127 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1132 redef fun check_visibility
(v
, p
)
1134 if p
.global
.visibility_level
>= 3 then return
1135 for n
in n_params
do
1136 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1138 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1143 redef readable var _position
: Int = 0
1145 redef fun variable
: ParamVariable do return _variable
.as(not null)
1146 var _variable
: nullable ParamVariable
1148 # The type of the parameter in signature
1149 readable writable var _stype
: nullable MMType
1151 redef fun accept_property_verifier
(v
)
1154 _position
= v
.signature_builder
.params
.length
1155 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1156 v
.signature_builder
.params
.add
(self)
1157 v
.signature_builder
.untyped_params
.add
(self)
1158 if n_type
!= null then
1159 var stype
= n_type
.get_stype
(v
).as(not null)
1160 for p
in v
.signature_builder
.untyped_params
do
1163 if v
.signature_builder
.vararg_rank
== -1 then
1164 v
.signature_builder
.vararg_rank
= p
.position
1166 v
.error
(self, "Error: A vararg parameter is already defined.")
1168 stype
= v
.type_array
(stype
)
1170 p
.variable
.stype
= stype
1172 v
.signature_builder
.untyped_params
.clear
1176 fun is_vararg
: Bool is abstract
1180 redef fun is_vararg
do return n_dotdotdot
!= null
1183 redef class AClosureDecl
1184 redef fun variable
: ClosureVariable do return _variable
.as(not null)
1185 var _variable
: nullable ClosureVariable
1187 redef fun accept_property_verifier
(v
)
1189 var old_signature_builder
= v
.signature_builder
1190 v
.signature_builder
= new SignatureBuilder
1192 var sig
= v
.signature_builder
.signature
1194 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1196 if sig
.return_type
!= null and n_kwbreak
!= null then
1197 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1200 # Add the finalizer to the closure signature
1201 var finalize_sig
= new MMSignature(new Array[MMType], null, v
.module.type_any
) # FIXME should be no receiver
1202 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1203 sig
.closures
.add
(finalizer_clos
)
1205 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1206 v
.signature_builder
= old_signature_builder
1207 old_signature_builder
.closure_decls
.add
(self)
1208 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1213 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1214 private fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1218 redef fun check_visibility
(v
, p
)
1220 if p
.global
.visibility_level
>= 3 then return
1221 var t
= get_stype
(v
)
1222 if t
== null then return
1223 var bc
= t
.local_class
1224 if bc
.global
.visibility_level
>= 3 then
1225 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1228 n
.check_visibility
(v
, p
)
1234 redef fun accept_class_builder
(v
) do end
1235 redef fun accept_property_builder
(v
) do end
1236 redef fun accept_property_verifier
(v
) do end