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
63 if tc
.error_count
> 0 then exit
(1)
65 # Class that we will process now are those in the hierarchy
66 # Its mean all the visible classes and their super-classes
67 # Note that leaves invisible classes are not in the 'classes' set
68 var classes
= class_specialization_hierarchy
.to_a
70 # Prepare class list to process the following in a right order
71 var sorter
= once
new CSHSorter
74 # Compute class ancestors types
75 var mmbv1b
= new ClassAncestorBuilder(tc
, self)
77 c
.accept_class_visitor
(mmbv1b
)
78 if tc
.error_count
> 0 then exit
(1)
82 # Check class conformity
83 var mmbv1b
= new ClassVerifierVisitor(tc
, self)
85 c
.accept_class_visitor
(mmbv1b
)
87 if tc
.error_count
> 0 then exit
(1)
89 # Property inhritance and introduction
90 var mmbv2
= new PropertyBuilderVisitor(tc
, self)
92 # Inherit global properties
93 c
.inherit_global_properties
95 # Global property introduction and redefinition
96 c
.accept_class_visitor
(mmbv2
)
98 # Default and inherited constructor if needed
99 if c
isa MMSrcLocalClass and c
.global
.intro
== c
and not c
.global
.is_universal
and not c
.global
.is_interface
then
100 c
.process_default_constructors
(mmbv2
)
103 # Note that inherited unredefined property are processed on demand latter
105 if tc
.error_count
> 0 then exit
(1)
107 # Property signature analysis and inheritance conformance
108 var mmbv3
= new PropertyVerifierVisitor(tc
, self)
110 c
.accept_properties_visitor
(mmbv3
)
113 # Check inherited local properties
115 for g
in c
.global_properties
do
116 if visibility_for
(g
.intro
.module) < g
.visibility_level
then continue
121 if tc
.error_count
> 0 then exit
(1)
125 redef class MMLocalClass
126 # Accept a class visitor (on class nodes)
127 private fun accept_class_visitor
(v
: AbsSyntaxVisitor)
131 # Accept a class visitor (on class properties)
132 private fun accept_properties_visitor
(v
: AbsSyntaxVisitor)
137 redef class MMSrcLocalClass
138 redef fun accept_class_visitor
(v
)
145 # Accept a class visitor (on class properties)
146 redef fun accept_properties_visitor
(v
)
152 for p
in src_local_properties
do
153 p
.accept_property_visitor
(v
)
157 # Introduce or inherit default constructors
158 private fun process_default_constructors
(v
: PropertyBuilderVisitor)
160 # Is there already a constructor ?
161 for gp
in global_properties
do
163 # Return if explicit constructor in the class
164 if gp
.intro
.local_class
== self then return
168 # Collect visible constructors in super stateful classes
169 var super_inits
= new ArraySet[MMLocalProperty]
170 var super_constructors
= new ArraySet[MMGlobalProperty]
171 for sc
in che
.direct_greaters
do
172 if sc
.global
.is_universal
or sc
.global
.is_interface
then continue
173 for gp
in sc
.global_properties
do
174 if not gp
.is_init
then continue
175 super_constructors
.add
(gp
)
177 var initname
= once
("init".to_symbol
)
178 if sc
.has_global_property_by_name
(initname
) then
179 var gp
= sc
.get_property_by_name
(initname
)
180 super_inits
.add
(self[gp
])
184 # Collect unassigned attributes
185 var unassigned_attributes
= new Array[MMSrcAttribute]
186 for a
in src_local_properties
do
187 if a
isa MMSrcAttribute then
189 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
193 if not super_constructors
.is_empty
then
194 # Select most specific classes introducing inheritable constructors
195 # Mixin classes are skipped
196 var supers
= new Array[MMLocalClass]
197 for gp
in super_constructors
do
198 var sc
= gp
.local_class
199 if supers
.has
(sc
) then continue
200 if not sc
.global
.is_mixin
then
204 supers
= che
.order
.select_smallests
(supers
)
206 # A mixin class can only have 0 or 1 most specific non-mixin superclass
207 var superclass
: nullable MMLocalClass = null # This most specific non-mixin superclass (if any)
209 if supers
.length
> 1 then
210 v
.error
(nodes
.first
, "Error: Explicit constructor required in {self} since multiple inheritance of constructor is forbiden. Conflicting classes are {supers.join(", ")}. Costructors are {super_constructors.join(", ")}.")
212 else if supers
.length
== 1 then
213 superclass
= supers
.first
216 for gp
in super_constructors
do
217 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
218 if superclass
== null or gp
.local_class
== superclass
then
219 make_visible_an_inherited_global_property
(gp
)
222 global
.mixin_of
= superclass
.as(not null).global
# FIXME Dear! this should break!
224 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
226 # unassigned attributes, then implicit consructors are generated
227 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
228 add_src_local_property
(v
, p
)
229 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
233 # Add a source property
234 # Register it to the class and attach it to global property
235 private fun add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
237 var pname
= prop
.name
238 # Check double definition in the same class
239 if src_local_properties
.has_key
(pname
) then
240 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
243 src_local_properties
[pname
] = prop
245 # Intro or redefinition ?
246 if has_global_property_by_name
(pname
) then
247 var g
= get_property_by_name
(pname
)
248 prop
.inherit_global
(g
)
251 if not prop
.is_global_set
then
253 prop
.global
.is_init
= prop
.is_init
258 redef class MMLocalProperty
259 private fun accept_property_visitor
(v
: AbsSyntaxVisitor)
264 redef class MMImplicitInit
265 readable var _super_init
: nullable MMLocalProperty = null
266 redef fun accept_property_visitor
(v
)
268 var base
: nullable MMLocalProperty = null
269 for p
in super_inits
do
270 if p
.signature
.arity
> 0 then
274 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
281 var params
= new Array[MMType]
283 var sig
= base
.signature
284 for i
in [0..sig
.arity
[ do
288 for a
in unassigned_attributes
do
289 var sig
= a
.signature
290 if sig
== null then return # Broken attribute definition
291 params
.add
(sig
.return_type
.as(not null))
293 signature
= new MMSignature(params
, null, local_class
.get_type
)
298 # Concrete NIT class specialization relation
301 # The related AST node
302 readable var _node
: ASuperclass
303 redef readable var _local_class
: MMLocalClass
305 init(n
: ASuperclass, c
: MMLocalClass)
312 ###############################################################################
314 # A pass visitor for syntax analysis.
315 # * Build the classes and attach them to global classes
316 # * Collect generic formal parameters.
317 private class ClassBuilderVisitor
318 special AbsSyntaxVisitor
319 # Current class arity
320 readable writable var _local_class_arity
: Int = 0
322 # Current class formal parameters
323 readable writable var _formals
: nullable Map[Symbol, MMTypeFormalParameter]
325 redef fun visit
(n
) do n
.accept_class_builder
(self)
329 # Another pass visitor for syntax analysis.
330 # * Build ancertors (with only class informations not the type one)
331 private class ClassSpecializationBuilderVisitor
332 special AbsSyntaxVisitor
333 redef fun visit
(n
) do n
.accept_class_specialization_builder
(self)
337 # Another pass visitor for syntax analysis.
338 # * Compute types in ancestors
339 private class ClassAncestorBuilder
340 special AbsSyntaxVisitor
341 redef fun visit
(n
) do n
.accept_class_ancestor_builder
(self)
345 # Another pass visitor for syntax analysis.
346 # * Checks classes in regard to superclasses
347 private class ClassVerifierVisitor
348 special AbsSyntaxVisitor
349 redef fun visit
(n
) do n
.accept_class_verifier
(self)
354 # Another pass visitor for syntax analysis.
355 # * Build propertie names
356 # * Build local properties and attache them to global properties
357 # * Attach bound to formal types
358 private class PropertyBuilderVisitor
359 special AbsSyntaxVisitor
360 redef fun visit
(n
) do n
.accept_property_builder
(self)
364 # Another pass pass visitor for syntax analysis.
365 # * Check property conformance
366 private class PropertyVerifierVisitor
367 special AbsSyntaxVisitor
369 # The signature currently build
370 readable writable var _signature_builder
: SignatureBuilder
372 redef fun visit
(n
) do n
.accept_property_verifier
(self)
377 _signature_builder
= new SignatureBuilder
381 # Information about a signature currently build
382 private class SignatureBuilder
383 # Current visited parameter types
384 readable writable var _params
: Array[PParam] = new Array[PParam]
386 # Visited parameters without type information added
387 readable writable var _untyped_params
: Array[PParam] = new Array[PParam]
389 # Position of the current star parameter
390 readable writable var _vararg_rank
: Int = -1
392 # Current closure declarations
393 readable writable var _closure_decls
: Array[AClosureDecl] = new Array[AClosureDecl]
395 # True is a problen occured durring building
396 readable writable var _has_error_occured
: Bool = false
399 readable writable var _signature
: nullable MMSignature = null
402 ###############################################################################
405 private fun accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
406 private fun accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
407 private fun accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
408 private fun accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
409 private fun accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
410 private fun accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
414 # Import supermodules and compute visibility
415 fun import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
417 # Import super-modules
418 var module_names_to_import
= new Array[Symbol]
419 var module_visibility
= new HashMap[Symbol, Int]
420 var no_import
: nullable PImport = null
421 for i
in n_imports
do
422 var n
= i
.module_name
424 module_names_to_import
.add
(n
)
425 module_visibility
[n
] = i
.visibility_level
430 if no_import
!= null then
431 if not module_names_to_import
.is_empty
then
432 tc
.error
("{no_import.locate}: Error: Top modules cannot import other modules.")
434 else if module_names_to_import
.is_empty
then
435 var stdname
= once
"standard".to_symbol
436 module_names_to_import
.add
(stdname
)
437 module_visibility
[stdname
] = 1
440 mod
.import_supers_modules
(module_names_to_import
)
442 for mname
in module_names_to_import
do
443 var level
= module_visibility
[mname
]
444 var m
= tc
.get_module
(mname
, mod
)
445 mod
.add_super_module
(m
, level
)
450 redef class APackagedecl
451 redef fun accept_class_builder
(v
)
453 if n_id
.to_symbol
!= v
.module.name
then
454 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
460 # Imported module name (or null)
461 fun module_name
: nullable Symbol is abstract
463 # Visibility level (intrude/public/private)
464 fun visibility_level
: Int is abstract
467 redef fun module_name
469 return n_id
.to_symbol
471 redef fun visibility_level
473 return n_visibility
.level
476 redef class ANoImport
477 redef fun module_name
483 redef class PVisibility
485 fun level
: Int is abstract
487 redef class APublicVisibility
488 redef fun level
do return 1
490 redef class AProtectedVisibility
491 redef fun level
do return 2
493 redef class APrivateVisibility
494 redef fun level
do return 3
496 redef class AIntrudeVisibility
497 redef fun level
do return 0
501 redef class PClassdef
502 redef fun local_class
: MMSrcLocalClass do return _local_class
.as(not null)
503 var _local_class
: nullable MMSrcLocalClass
506 fun name
: Symbol is abstract
508 # Number of formal parameters
509 fun arity
: Int do return 0
511 # Visibility of the class
512 fun visibility_level
: Int do return 1
514 redef fun accept_class_builder
(v
)
516 var local_class
: MMSrcLocalClass
518 var local_classes
= mod
.src_local_classes
519 if (local_classes
.has_key
(name
)) then
520 local_class
= local_classes
[name
]
521 if self isa AClassdef then
522 # If we are not a special implicit class then rant
523 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
526 local_class
.nodes
.add
(self)
528 local_class
= new MMSrcLocalClass(mod
, name
, self, arity
)
529 local_classes
[name
] = local_class
530 if not mod
.has_global_class_named
(name
) then
531 local_class
.new_global
533 local_class
.set_global
(mod
.global_class_named
(name
))
537 _local_class
= local_class
538 v
.local_class_arity
= 0
539 v
.formals
= local_class
.formal_dict
548 redef fun accept_abs_syntax_visitor
(v
)
550 v
.local_class
= _local_class
556 redef class PClasskind
557 fun is_interface
: Bool do return false
558 fun is_universal
: Bool do return false
559 fun is_abstract
: Bool do return false
562 redef class AInterfaceClasskind
563 redef fun is_interface
do return true
565 redef class AUniversalClasskind
566 redef fun is_universal
do return true
568 redef class AAbstractClasskind
569 redef fun is_abstract
do return true
572 redef class AClassdef
575 return n_id
.to_symbol
579 return n_formaldefs
.length
581 redef fun accept_class_verifier
(v
)
584 var glob
= _local_class
.global
585 if glob
.intro
== _local_class
then
587 glob
.visibility_level
= visibility_level
588 glob
.is_interface
= n_classkind
.is_interface
589 glob
.is_abstract
= n_classkind
.is_abstract
590 glob
.is_universal
= n_classkind
.is_universal
591 if n_kwredef
!= null then
592 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
595 for c
in _local_class
.cshe
.direct_greaters
do
597 if glob
.is_interface
then
598 if cg
.is_universal
then
599 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
600 else if not cg
.is_interface
then
601 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
603 else if glob
.is_universal
then
604 if not cg
.is_interface
and not cg
.is_universal
then
605 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
608 if cg
.is_universal
then
609 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
619 glob
.check_visibility
(v
, self, v
.module)
620 if n_kwredef
== null then
621 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
625 if glob
.intro
.arity
!= _local_class
.arity
then
626 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
630 not glob
.is_interface
and n_classkind
.is_interface
or
631 not glob
.is_abstract
and n_classkind
.is_abstract
or
632 not glob
.is_universal
and n_classkind
.is_universal
634 v
.error
(self, "Redef error: cannot change kind of class {name}.")
638 redef fun visibility_level
640 return n_visibility
.level
644 redef class AMainClassdef
647 return once
"Sys".to_symbol
651 redef class ATopClassdef
654 return once
"Object".to_symbol
658 class MMSrcTypeFormalParameter
659 special MMTypeFormalParameter
660 # The associated node
661 readable var _node
: AFormaldef
663 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
665 super(name
, pos
, local_class
)
670 redef class AFormaldef
671 # The associated formal generic parameter (MM entity)
672 var _formal
: nullable MMSrcTypeFormalParameter
674 redef fun accept_class_builder
(v
)
676 var name
= n_id
.to_symbol
677 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
678 _formal
= formal_type
679 v
.local_class_arity
= v
.local_class_arity
+ 1
680 v
.local_class
.register_formal
(formal_type
)
681 v
.formals
[name
] = formal_type
685 redef fun accept_class_verifier
(v
)
688 var c
= v
.local_class
689 var o
= c
.global
.intro
691 if n_type
== null then
692 _formal
.bound
= v
.module.type_any
.as_nullable
694 var stype
= n_type
.get_stype
(v
)
695 if stype
== null then return
696 _formal
.bound
= stype
699 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
700 if n_type
== null then
703 var stype
= n_type
.get_stype
(v
)
704 if stype
== null then return
705 _formal
.bound
= stype
706 if _formal
.bound
!= ob
then
707 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
714 redef class ASuperclass
715 readable var _ancestor
: nullable MMSrcAncestor
717 redef fun accept_class_specialization_builder
(v
)
720 var c
= n_type
.get_local_class
(v
)
721 if c
== null then return
722 var ancestor
= new MMSrcAncestor(self, c
)
724 v
.local_class
.add_direct_parent
(ancestor
)
727 redef fun accept_class_ancestor_builder
(v
)
730 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
731 _ancestor
.inheriter
= v
.local_class
.get_type
734 redef fun accept_class_verifier
(v
)
737 n_type
.check_conform
(v
)
742 # Process and check properties of the property.
743 # * Distinguish inits and methods
744 # * Inherit or check visibility.
745 # * Check redef errors.
746 # * Check forbiden attribute definitions.
747 # * Check signature conformance.
748 private fun process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
750 if prop
.global
.intro
== prop
then
751 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
753 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
757 # The part of process_and_check when prop is an introduction
758 private fun do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
760 var glob
= prop
.global
761 var gbc
= prop
.local_class
.global
762 if v
.local_class
.global
.visibility_level
>= 3 then
763 # Method of private classes are private
766 glob
.visibility_level
= visibility_level
768 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
770 if glob
.is_attribute
then
771 if gbc
.is_interface
then
772 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
773 else if gbc
.is_universal
then
774 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
776 else if glob
.is_init
then
777 if gbc
.is_interface
then
778 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
779 else if gbc
.is_universal
then
780 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
783 if prop
.signature
== null then
785 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
786 inherit_signature
(v
, prop
, supers
)
788 if prop
.signature
!= null or v
.signature_builder
.has_error_occured
then
790 else if not v
.signature_builder
.untyped_params
.is_empty
then
791 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
793 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
794 for clos
in v
.signature_builder
.closure_decls
do
795 prop
.signature
.closures
.add
(clos
.variable
.closure
)
801 private fun inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
803 var s
= prop
.signature
805 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
808 if v
.signature_builder
.params
.length
!= isig
.arity
then
809 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
812 for p
in v
.signature_builder
.params
do
813 var t
= isig
[p
.position
]
815 if p
.position
== isig
.vararg_rank
then
827 # The part of process_and_check when prop is a redefinition
828 private fun do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
830 var is_init
= self isa AConcreteInitPropdef
831 var glob
= prop
.global
833 if not has_redef
then
834 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
837 if glob
.is_init
and not is_init
then
838 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
839 else if not glob
.is_init
and is_init
then
840 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
843 var s
= prop
.signature
844 #print "process {prop.local_class.module}::{prop.local_class}::{prop} from global {prop.global.local_property.local_class.module}::{prop.global.local_property.local_class}::{prop.global.local_property}"
845 for i
in prop
.prhe
.direct_greaters
do
846 var ip
= i
.local_class
[prop
.global
]
847 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
850 #print "{prop.full_name} inherits signature from {ip.full_name}"
851 if v
.signature_builder
.params
.length
!= isig
.arity
then
852 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
855 if v
.signature_builder
.closure_decls
.length
!= isig
.closures
.length
then
856 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} closure(s).")
859 for p
in v
.signature_builder
.params
do
860 var t
= isig
[p
.position
]
862 if p
.position
== isig
.vararg_rank
then
872 var nberr
= v
.tc
.error_count
873 #print "Check {prop.local_class}::{prop}{s} vs {ip.local_class}::{ip}{isig}"
874 #print "s={s.object_id} isig={isig.object_id} isigorig={i.signature.object_id}"
876 #print "orig signature: {i.signature.recv} . {i.signature}"
877 #print "inh signature: {isig.recv} . {isig}"
878 #print "redef signature: {s.recv} . {s}"
880 if s
.arity
!= isig
.arity
then
881 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
883 for i
in [0..s
.arity
[ do
884 if s
[i
] != isig
[i
] then
885 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
890 var srt
= s
.return_type
891 var isrt
= isig
.return_type
892 if srt
== null and isrt
!= null then
893 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
894 else if srt
!= null and isrt
== null then
895 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
896 else if srt
!= null and isrt
!= null and not srt
< isrt
then
897 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
898 else if not s
< isig
and nberr
== v
.tc
.error_count
then
899 # Systematic fallback for conformance check
900 v
.error
(self, "Redef error: Incompatible redefinition of {ip.local_class}::{ip} with {prop.local_class}::{prop}")
901 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
903 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
907 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
908 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
910 glob
.check_visibility
(v
, self, v
.module, true)
914 redef class AAttrPropdef
915 redef readable var _readmethod
: nullable MMSrcMethod
916 redef readable var _writemethod
: nullable MMSrcMethod
917 var _prop
: nullable MMSrcAttribute
918 redef fun prop
do return _prop
.as(not null)
920 redef fun accept_property_builder
(v
)
923 var name
= n_id
.to_symbol
924 var lc
= v
.local_class
925 var prop
= new MMSrcAttribute(name
, lc
, self)
927 v
.local_class
.add_src_local_property
(v
, prop
)
929 if n_readable
!= null then
930 name
= n_id
.text
.substring_from
(1).to_symbol
931 var readmethod
= new MMReadImplementationMethod(name
, lc
, self)
932 _readmethod
= readmethod
933 v
.local_class
.add_src_local_property
(v
, readmethod
)
935 if n_writable
!= null then
936 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
937 var writemethod
= new MMWriteImplementationMethod(name
, lc
, self)
938 _writemethod
= writemethod
939 v
.local_class
.add_src_local_property
(v
, writemethod
)
943 redef fun accept_property_verifier
(v
)
947 if n_type
!= null then
948 var t0
= n_type
.get_stype
(v
)
949 if t0
!= null then t
= t0
else return
951 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
956 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
957 prop
.signature
= signature
958 var visibility_level
= n_visibility
.level
959 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
960 if n_readable
!= null then
961 var m
= _readmethod
.as(not null)
962 m
.signature
= signature
963 process_and_check
(v
, m
, n_readable
.n_kwredef
!= null, visibility_level
)
964 n_type
.check_visibility
(v
, m
)
966 if n_writable
!= null then
967 var m
= _writemethod
.as(not null)
968 m
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
969 process_and_check
(v
, m
, n_writable
.n_kwredef
!= null, visibility_level
)
970 n_type
.check_visibility
(v
, m
)
974 redef fun accept_abs_syntax_visitor
(v
)
976 v
.local_property
= _prop
978 v
.local_property
= null
982 redef class AMethPropdef
984 readable var _name
: nullable Symbol
986 var _method
: nullable MMMethSrcMethod
987 redef fun method
do return _method
.as(not null)
989 redef fun accept_property_builder
(v
)
993 if n_methid
== null then
994 if self isa AConcreteInitPropdef then
995 name
= once
"init".to_symbol
997 name
= once
"main".to_symbol
1000 name
= n_methid
.name
.as(not null)
1001 # FIXME: Add the 'unary' keyword
1002 if n_methid
.name
== (once
"-".to_symbol
) then
1003 var ns
= n_signature
1004 if ns
isa ASignature and ns
.n_params
.length
== 0 then
1005 name
= once
"unary -".to_symbol
1010 var prop
= new MMMethSrcMethod(name
, v
.local_class
, self)
1012 v
.local_class
.add_src_local_property
(v
, prop
)
1015 redef fun accept_property_verifier
(v
)
1017 v
.signature_builder
= new SignatureBuilder
1020 if v
.signature_builder
.has_error_occured
then return
1022 if v
.signature_builder
.signature
== null then
1023 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
1025 method
.signature
= v
.signature_builder
.signature
.as(not null)
1027 var visibility_level
= 1
1028 if n_visibility
!= null and n_visibility
.level
> 1 then
1029 visibility_level
= n_visibility
.level
1031 process_and_check
(v
, method
, n_kwredef
!= null, visibility_level
)
1032 if n_signature
!= null then n_signature
.check_visibility
(v
, method
)
1035 redef fun accept_abs_syntax_visitor
(v
)
1037 v
.local_property
= _method
1039 v
.local_property
= null
1043 redef class AMainMethPropdef
1044 redef fun process_and_check
(v
, prop
, has_redef
, visibility_level
)
1046 prop
.global
.visibility_level
= visibility_level
1047 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1048 # Disable all checks for main
1052 redef class ATypePropdef
1053 redef fun prop
do return _prop
.as(not null)
1054 var _prop
: nullable MMSrcTypeProperty
1056 redef fun accept_property_builder
(v
)
1059 var name
= n_id
.to_symbol
1060 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1062 v
.local_class
.add_src_local_property
(v
, prop
)
1065 redef fun accept_property_verifier
(v
)
1068 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1069 prop
.signature
= signature
1070 var visibility_level
= n_visibility
.level
1071 process_and_check
(v
, prop
, n_kwredef
!= null, visibility_level
)
1074 redef fun accept_abs_syntax_visitor
(v
)
1076 v
.local_property
= _prop
1078 v
.local_property
= null
1082 # Visitor used to build a full method name from multiple tokens
1083 private class MethidAccumulator
1085 readable var _name
: Buffer = new Buffer
1089 _name
.append
(n
.text
)
1098 readable var _name
: nullable Symbol
1100 redef fun accept_property_builder
(v
)
1102 var accumulator
= new MethidAccumulator
1103 accumulator
.visit
(self)
1104 _name
= accumulator
.name
.to_s
.to_symbol
1109 redef class PSignature
1110 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1111 fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1114 redef class ASignature
1115 redef fun accept_property_verifier
(v
)
1118 if v
.signature_builder
.has_error_occured
then
1120 else if not v
.signature_builder
.untyped_params
.is_empty
then
1121 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1122 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1125 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1126 var pars
= new Array[MMType]
1127 for p
in v
.signature_builder
.params
do
1128 pars
.add
(p
.stype
.as(not null))
1130 var ret
: nullable MMType = null
1131 if n_type
!= null then
1132 ret
= n_type
.get_stype
(v
)
1134 v
.signature_builder
.has_error_occured
= true
1138 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1139 if v
.signature_builder
.vararg_rank
>= 0 then
1140 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1142 for clos
in v
.signature_builder
.closure_decls
do
1143 v
.signature_builder
.signature
.closures
.add
(clos
.variable
.closure
)
1148 redef fun check_visibility
(v
, p
)
1150 if p
.global
.visibility_level
>= 3 then return
1151 for n
in n_params
do
1152 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1154 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1159 redef readable var _position
: Int = 0
1161 redef fun variable
: ParamVariable do return _variable
.as(not null)
1162 var _variable
: nullable ParamVariable
1164 # The type of the parameter in signature
1165 readable writable var _stype
: nullable MMType
1167 redef fun accept_property_verifier
(v
)
1170 _position
= v
.signature_builder
.params
.length
1171 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1172 v
.signature_builder
.params
.add
(self)
1173 v
.signature_builder
.untyped_params
.add
(self)
1174 if n_type
!= null then
1175 var stype
= n_type
.get_stype
(v
)
1176 if stype
== null then
1177 v
.signature_builder
.has_error_occured
= true
1180 for p
in v
.signature_builder
.untyped_params
do
1183 if v
.signature_builder
.vararg_rank
== -1 then
1184 v
.signature_builder
.vararg_rank
= p
.position
1186 v
.error
(self, "Error: A vararg parameter is already defined.")
1188 stype
= v
.type_array
(stype
)
1190 p
.variable
.stype
= stype
1192 v
.signature_builder
.untyped_params
.clear
1196 fun is_vararg
: Bool is abstract
1200 redef fun is_vararg
do return n_dotdotdot
!= null
1203 redef class AClosureDecl
1204 redef fun variable
: ClosureVariable do return _variable
.as(not null)
1205 var _variable
: nullable ClosureVariable
1207 redef fun accept_property_verifier
(v
)
1209 var old_signature_builder
= v
.signature_builder
1210 v
.signature_builder
= new SignatureBuilder
1212 if v
.signature_builder
.has_error_occured
then
1215 var sig
= v
.signature_builder
.signature
1217 sig
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1219 if sig
.return_type
!= null and n_kwbreak
!= null then
1220 v
.error
(self, "Syntax Error: A break block cannot have a return value.")
1223 # Add the finalizer to the closure signature
1224 var finalize_sig
= new MMSignature(new Array[MMType], null, v
.module.type_any
) # FIXME should be no receiver
1225 var finalizer_clos
= new MMClosure(finalize_sig
, false, true)
1226 sig
.closures
.add
(finalizer_clos
)
1228 var clos
= new MMClosure(sig
, n_kwbreak
!= null, n_expr
!= null)
1229 v
.signature_builder
= old_signature_builder
1230 old_signature_builder
.closure_decls
.add
(self)
1231 _variable
= new ClosureVariable(n_id
.to_symbol
, self, clos
)
1236 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1237 private fun check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1241 redef fun check_visibility
(v
, p
)
1243 if p
.global
.visibility_level
>= 3 then return
1244 var t
= get_stype
(v
)
1245 if t
== null then return
1246 var bc
= t
.local_class
1247 if bc
.global
.visibility_level
>= 3 then
1248 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1251 n
.check_visibility
(v
, p
)
1257 redef fun accept_class_builder
(v
) do end
1258 redef fun accept_property_builder
(v
) do end
1259 redef fun accept_property_verifier
(v
) do end