1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2008 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Build MM entity from NIT AST and check conformance of these entities.
18 # This module introduce specific MM class (MMSrcXXX) that specialize the abstract one from metamodel
24 # Class specialization hierarchy sorter
25 private class CSHSorter
26 special AbstractSorter[MMLocalClass]
27 redef meth compare
(a
, b
)
29 return a
.cshe
.rank
<=> b
.cshe
.rank
35 redef class MMSrcModule
36 # Syntax analysis and MM construction for the module
37 # Require that supermodules are processed
38 meth do_mmbuilder
(tc
: ToolContext)
40 # Import global classes
43 # Create local classes and attach them to global classes
44 var mmbv
= new ClassBuilderVisitor(tc
, self)
46 if tc
.error_count
> 0 then exit
(1)
48 # Import unrefined local classes and attach them to global classes
51 # Resolve classes in super clauses
52 var mmbv1
= new ClassSpecializationBuilderVisitor(tc
, self)
54 if tc
.error_count
> 0 then exit
(1)
56 # Compute specialization relation
57 for c
in local_classes
do
58 if visibility_for
(c
.global
.intro
.module) < c
.global
.visibility_level
then
61 c
.compute_super_classes
64 # Class that we will process now are those in the hierarchy
65 # Its mean all the visible classes and their super-classes
66 # Note that leaves invisible classes are not in the 'classes' set
67 var classes
= class_specialization_hierarchy
.to_a
69 # Prepare class list to process the following in a right order
70 var sorter
= once
new CSHSorter
73 # Compute class ancestors types
74 var mmbv1b
= new ClassAncestorBuilder(tc
, self)
76 c
.accept_class_visitor
(mmbv1b
)
79 if tc
.error_count
> 0 then exit
(1)
81 # Check class conformity
82 var mmbv1b
= new ClassVerifierVisitor(tc
, self)
84 c
.accept_class_visitor
(mmbv1b
)
86 if tc
.error_count
> 0 then exit
(1)
88 # Property inhritance and introduction
89 var mmbv2
= new PropertyBuilderVisitor(tc
, self)
91 # Inherit global properties
92 c
.inherit_global_properties
94 # Global property introduction and redefinition
95 c
.accept_class_visitor
(mmbv2
)
97 # Default and inherited constructor if needed
98 if c
isa MMSrcLocalClass and c
.global
.intro
== c
and not c
.global
.is_universal
and not c
.global
.is_interface
then
99 c
.process_default_constructors
(mmbv2
)
102 # Note that inherited unredefined property are processed on demand latter
104 if tc
.error_count
> 0 then exit
(1)
106 # Property signature analysis and inheritance conformance
107 var mmbv3
= new PropertyVerifierVisitor(tc
, self)
109 c
.accept_properties_visitor
(mmbv3
)
112 # Check inherited local properties
114 for g
in c
.global_properties
do
115 if visibility_for
(g
.intro
.module) < g
.visibility_level
then continue
120 if tc
.error_count
> 0 then exit
(1)
124 redef class MMLocalClass
125 # Accept a class visitor (on class nodes)
126 private meth accept_class_visitor
(v
: AbsSyntaxVisitor)
130 # Accept a class visitor (on class properties)
131 private meth accept_properties_visitor
(v
: AbsSyntaxVisitor)
136 redef class MMSrcLocalClass
137 redef meth accept_class_visitor
(v
)
144 # Accept a class visitor (on class properties)
145 redef meth accept_properties_visitor
(v
)
151 for p
in src_local_properties
do
152 p
.accept_property_visitor
(v
)
156 # A mixin class can be build the same way that one of its superclasses
157 readable attr _is_mixin
: Bool = false
159 # Introduce or inherit default constructors
160 private meth process_default_constructors
(v
: PropertyBuilderVisitor)
162 # Is there already a constructor ?
163 for gp
in global_properties
do
165 # Return if explicit constructor in the class
166 if gp
.intro
.local_class
== self then return
170 # Collect visible constructors in super stateful classes
171 var super_inits
= new ArraySet[MMLocalProperty]
172 var super_constructors
= new ArraySet[MMGlobalProperty]
173 for sc
in che
.direct_greaters
do
174 if sc
.global
.is_universal
or sc
.global
.is_interface
then continue
175 for gp
in sc
.global_properties
do
176 if not gp
.is_init
then continue
177 super_constructors
.add
(gp
)
179 var gp
= sc
.get_property_by_name
(once
("init".to_symbol
))
181 super_inits
.add
(self[gp
])
185 # Collect unassigned attributes
186 var unassigned_attributes
= new Array[MMSrcAttribute]
187 for a
in src_local_properties
do
188 if a
isa MMSrcAttribute then
190 assert n
isa AAttrPropdef
191 if n
.n_expr
== null then unassigned_attributes
.add
(a
)
195 if not super_constructors
.is_empty
then
196 # Select most specific classes introducing inheritable constructors
197 # Mixin classes are skipped
198 var supers
= new Array[MMLocalClass]
199 for gp
in super_constructors
do
200 var sc
= gp
.local_class
201 if supers
.has
(sc
) then continue
202 assert sc
isa MMSrcLocalClass
203 if not sc
.is_mixin
then
207 supers
= che
.order
.select_smallests
(supers
)
209 # A mixin class can only have 0 or 1 most specific non-mixin superclass
210 var superclass
: MMLocalClass = null # This most specific non-mixin superclass (if any)
212 if supers
.length
> 1 then
213 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(", ")}.")
215 else if supers
.length
== 1 then
216 superclass
= supers
.first
219 for gp
in super_constructors
do
220 # Inherit constructors : the one of the non-mixin super class or all from the all mixin super-classes
221 if superclass
== null or gp
.local_class
== superclass
then
222 make_visible_an_inherited_global_property
(gp
)
227 # v.error(nodes.first, "Error, constructor required in {self} since no anonimous init found in {sc}.")
229 # unassigned attributes, then implicit consructors are generated
230 var p
= new MMImplicitInit(self, unassigned_attributes
, super_inits
.to_a
)
231 add_src_local_property
(v
, p
)
232 #print("Create implicit init {p} in {self} from {super_inits.join(", ")} + {unassigned_attributes.length} args")
236 # Add a source property
237 # Register it to the class and attach it to global property
238 private meth add_src_local_property
(v
: PropertyBuilderVisitor, prop
: MMLocalProperty)
240 var pname
= prop
.name
241 # Check double definition in the same class
242 if src_local_properties
.has_key
(pname
) then
243 v
.error
(prop
.node
, "Error: A property {pname} is already defined in class {name}.")
246 src_local_properties
[pname
] = prop
248 # Intro or redefinition ?
249 if has_global_property_by_name
(pname
) then
250 var globs
= properties_by_name
[pname
]
251 if globs
.length
> 1 then
252 v
.error
(prop
.node
, "Name error: {self} inherits {globs.length} global properties named {pname}.")
255 prop
.inherit_global
(g
)
258 if prop
.global
== null then
260 prop
.global
.is_init
= prop
.is_init
265 redef class MMLocalProperty
266 private meth accept_property_visitor
(v
: AbsSyntaxVisitor)
271 redef class MMImplicitInit
272 readable attr _super_init
: MMLocalProperty = null
273 redef meth accept_property_visitor
(v
)
275 var base
: MMLocalProperty = null
276 for p
in super_inits
do
277 if p
.signature
.arity
> 0 then
281 v
.error
(null, "Error: explicit constructor needed in {local_class} since both super-constructor {base.full_name} and {p.full_name} have paramters")
288 var params
= new Array[MMType]
290 var sig
= base
.signature
291 for i
in [0..sig
.arity
[ do
295 for a
in unassigned_attributes
do
296 params
.add
(a
.signature
.return_type
)
298 signature
= new MMSignature(params
, null, local_class
.get_type
)
303 # Concrete NIT class specialization relation
306 # The related AST node
307 readable attr _node
: ASuperclass
308 redef readable attr _local_class
: MMLocalClass
310 init(n
: ASuperclass, c
: MMLocalClass)
317 ###############################################################################
319 # A pass visitor for syntax analysis.
320 # * Build the classes and attach them to global classes
321 # * Collect generic formal parameters.
322 private class ClassBuilderVisitor
323 special AbsSyntaxVisitor
324 # Current class arity
325 readable writable attr _local_class_arity
: Int
327 # Current class formal parameters
328 readable writable attr _formals
: Map[Symbol, MMTypeFormalParameter]
330 redef meth visit
(n
) do n
.accept_class_builder
(self)
334 # Another pass visitor for syntax analysis.
335 # * Build ancertors (with only class informations not the type one)
336 private class ClassSpecializationBuilderVisitor
337 special AbsSyntaxVisitor
338 redef meth visit
(n
) do n
.accept_class_specialization_builder
(self)
342 # Another pass visitor for syntax analysis.
343 # * Compute types in ancestors
344 private class ClassAncestorBuilder
345 special AbsSyntaxVisitor
346 redef meth visit
(n
) do n
.accept_class_ancestor_builder
(self)
350 # Another pass visitor for syntax analysis.
351 # * Checks classes in regard to superclasses
352 private class ClassVerifierVisitor
353 special AbsSyntaxVisitor
354 redef meth visit
(n
) do n
.accept_class_verifier
(self)
359 # Another pass visitor for syntax analysis.
360 # * Build propertie names
361 # * Build local properties and attache them to global properties
362 # * Attach bound to formal types
363 private class PropertyBuilderVisitor
364 special AbsSyntaxVisitor
365 redef meth visit
(n
) do n
.accept_property_builder
(self)
369 # Another pass pass visitor for syntax analysis.
370 # * Check property conformance
371 private class PropertyVerifierVisitor
372 special AbsSyntaxVisitor
374 # The signature currently build
375 readable writable attr _signature_builder
: SignatureBuilder
377 redef meth visit
(n
) do n
.accept_property_verifier
(self)
382 _signature_builder
= new SignatureBuilder
386 # Information about a signature currently build
387 private class SignatureBuilder
388 # Current visited parameter types
389 readable writable attr _params
: Array[PParam] = new Array[PParam]
391 # Visited parameters without type information added
392 readable writable attr _untyped_params
: Array[PParam] = new Array[PParam]
394 # Position of the current star parameter
395 readable writable attr _vararg_rank
: Int = -1
398 readable writable attr _signature
: MMSignature = null
401 ###############################################################################
404 private meth accept_class_builder
(v
: ClassBuilderVisitor) do accept_abs_syntax_visitor
(v
)
405 private meth accept_class_specialization_builder
(v
: ClassSpecializationBuilderVisitor) do accept_abs_syntax_visitor
(v
)
406 private meth accept_class_ancestor_builder
(v
: ClassAncestorBuilder) do accept_abs_syntax_visitor
(v
)
407 private meth accept_class_verifier
(v
: ClassVerifierVisitor) do accept_abs_syntax_visitor
(v
)
408 private meth accept_property_builder
(v
: PropertyBuilderVisitor) do accept_abs_syntax_visitor
(v
)
409 private meth accept_property_verifier
(v
: PropertyVerifierVisitor) do accept_abs_syntax_visitor
(v
)
413 # Import supermodules and compute visibility
414 meth import_super_modules
(tc
: ToolContext, mod
: MMSrcModule)
416 # Import super-modules
417 var module_names_to_import
= new Array[Symbol]
418 var module_visibility
= new HashMap[Symbol, Int]
419 var no_import
: PImport = null
420 for i
in n_imports
do
421 var n
= i
.module_name
423 module_names_to_import
.add
(n
)
424 module_visibility
[n
] = i
.visibility_level
429 if no_import
!= null then
430 if not module_names_to_import
.is_empty
then
431 tc
.error
("{no_import.locate}: Error: Top modules cannot import other modules.")
433 else if module_names_to_import
.is_empty
then
434 var stdname
= once
"standard".to_symbol
435 module_names_to_import
.add
(stdname
)
436 module_visibility
[stdname
] = 1
439 mod
.import_supers_modules
(module_names_to_import
)
441 for mname
in module_names_to_import
do
442 var level
= module_visibility
[mname
]
443 var m
= tc
.get_module
(mname
, mod
)
444 mod
.add_super_module
(m
, level
)
449 redef class APackagedecl
450 redef meth accept_class_builder
(v
)
452 if n_id
.to_symbol
!= v
.module.name
then
453 v
.error
(n_id
, "Error: Package name missmatch between {v.module.name} and {n_id.to_symbol}")
459 # Imported module name (or null)
460 meth module_name
: Symbol is abstract
462 # Visibility level (intrude/public/private)
463 meth visibility_level
: Int is abstract
466 redef meth module_name
468 return n_id
.to_symbol
470 redef meth visibility_level
472 return n_visibility
.level
475 redef class ANoImport
476 redef meth module_name
482 redef class PVisibility
484 meth level
: Int is abstract
486 redef class APublicVisibility
487 redef meth level
do return 1
489 redef class AProtectedVisibility
490 redef meth level
do return 2
492 redef class APrivateVisibility
493 redef meth level
do return 3
495 redef class AIntrudeVisibility
496 redef meth level
do return 0
500 redef class PClassdef
501 redef readable attr _local_class
: MMSrcLocalClass
504 meth name
: Symbol is abstract
506 # Number of formal parameters
507 meth arity
: Int do return 0
509 # Visibility of the class
510 meth visibility_level
: Int do return 1
512 redef meth accept_class_builder
(v
)
514 var local_class
: MMSrcLocalClass
516 var local_classes
= mod
.src_local_classes
517 if (local_classes
.has_key
(name
)) then
518 local_class
= local_classes
[name
]
519 if self isa AClassdef then
520 # If we are not a special implicit class then rant
521 v
.error
(self, "Error: A class {name} is already defined at line {local_class.nodes.first.first_token.line}.")
524 local_class
.nodes
.add
(self)
526 local_class
= new MMSrcLocalClass(name
, self, arity
)
527 mod
.add_local_class
(local_class
)
528 local_classes
[name
] = local_class
529 var g
= mod
.global_class_named
(name
)
532 local_class
.new_global
533 g
= local_class
.global
535 local_class
.set_global
(g
)
539 _local_class
= local_class
540 v
.local_class_arity
= 0
541 v
.formals
= new HashMap[Symbol, MMTypeFormalParameter]
547 _local_class
.formal_dict
= v
.formals
551 redef meth accept_abs_syntax_visitor
(v
)
553 v
.local_class
= _local_class
559 redef class PClasskind
560 meth is_interface
: Bool do return false
561 meth is_universal
: Bool do return false
562 meth is_abstract
: Bool do return false
565 redef class AInterfaceClasskind
566 redef meth is_interface
do return true
568 redef class AUniversalClasskind
569 redef meth is_universal
do return true
571 redef class AAbstractClasskind
572 redef meth is_abstract
do return true
575 redef class AClassdef
578 return n_id
.to_symbol
582 return n_formaldefs
.length
584 redef meth accept_class_verifier
(v
)
587 var glob
= _local_class
.global
588 if glob
.intro
== _local_class
then
590 glob
.visibility_level
= visibility_level
591 glob
.is_interface
= n_classkind
.is_interface
592 glob
.is_abstract
= n_classkind
.is_abstract
593 glob
.is_universal
= n_classkind
.is_universal
594 if n_kwredef
!= null then
595 v
.error
(self, "Redef error: No class {name} is imported. Remove the redef keyword to define a new class.")
598 for c
in _local_class
.cshe
.direct_greaters
do
600 if glob
.is_interface
then
601 if cg
.is_universal
then
602 v
.error
(self, "Special error: Interface {name} try to specialise universal class {c.name}.")
603 else if not cg
.is_interface
then
604 v
.error
(self, "Special error: Interface {name} try to specialise class {c.name}.")
606 else if glob
.is_universal
then
607 if not cg
.is_interface
and not cg
.is_universal
then
608 v
.error
(self, "Special error: Universal class {name} try to specialise class {c.name}.")
611 if cg
.is_universal
then
612 v
.error
(self, "Special error: Class {name} try to specialise universal class {c.name}.")
622 glob
.check_visibility
(v
, self, v
.module)
623 if n_kwredef
== null then
624 v
.error
(self, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
628 if glob
.intro
.arity
!= _local_class
.arity
then
629 v
.error
(self, "Redef error: Formal parameter arity missmatch; got {_local_class.arity}, expected {glob.intro.arity}.")
633 not glob
.is_interface
and n_classkind
.is_interface
or
634 not glob
.is_abstract
and n_classkind
.is_abstract
or
635 not glob
.is_universal
and n_classkind
.is_universal
637 v
.error
(self, "Redef error: cannot change kind of class {name}.")
641 redef meth visibility_level
643 return n_visibility
.level
647 redef class AMainClassdef
650 return once
"Sys".to_symbol
654 redef class ATopClassdef
657 return once
"Object".to_symbol
661 class MMSrcTypeFormalParameter
662 special MMTypeFormalParameter
663 # The associated node
664 readable attr _node
: AFormaldef
666 init(name
: Symbol, pos
: Int, local_class
: MMLocalClass, n
: AFormaldef)
668 super(name
, pos
, local_class
)
673 redef class AFormaldef
674 # The associated formal generic parameter (MM entity)
675 attr _formal
: MMSrcTypeFormalParameter
677 redef meth accept_class_builder
(v
)
679 var name
= n_id
.to_symbol
680 var formal_type
= new MMSrcTypeFormalParameter(name
, v
.local_class_arity
, v
.local_class
, self)
681 _formal
= formal_type
682 v
.local_class_arity
= v
.local_class_arity
+ 1
683 v
.local_class
.register_formal
(formal_type
)
684 v
.formals
[name
] = formal_type
688 redef meth accept_class_verifier
(v
)
691 var c
= v
.local_class
692 var o
= c
.global
.intro
694 if n_type
== null then
695 _formal
.bound
= v
.module.type_any
697 _formal
.bound
= n_type
.get_stype
(v
)
700 var ob
= o
.get_formal
(_formal
.position
).bound
.for_module
(v
.module)
701 if n_type
== null then
704 _formal
.bound
= n_type
.get_stype
(v
)
705 if _formal
.bound
!= ob
then
706 v
.error
(self, "Redef error: Cannot change formal parameter type of class {c}; got {_formal.bound}, expected {ob}.")
713 redef class ASuperclass
714 readable attr _ancestor
: MMSrcAncestor
716 redef meth accept_class_specialization_builder
(v
)
719 var c
= n_type
.get_local_class
(v
)
720 var ancestor
= new MMSrcAncestor(self, c
)
722 v
.local_class
.add_direct_parent
(ancestor
)
725 redef meth accept_class_ancestor_builder
(v
)
728 _ancestor
.stype
= n_type
.get_unchecked_stype
(v
)
729 _ancestor
.inheriter
= v
.local_class
.get_type
732 redef meth accept_class_verifier
(v
)
735 n_type
.check_conform
(v
)
740 # Process and check properties of the property.
741 # * Distinguish inits and methods
742 # * Inherit or check visibility.
743 # * Check redef errors.
744 # * Check forbiden attribute definitions.
745 # * Check signature conformance.
746 private meth process_and_check
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
748 if prop
.global
.intro
== prop
then
749 do_and_check_intro
(v
, prop
, has_redef
, visibility_level
)
751 do_and_check_redef
(v
, prop
, has_redef
, visibility_level
)
755 # The part of process_and_check when prop is an introduction
756 private meth do_and_check_intro
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
758 var glob
= prop
.global
759 var gbc
= prop
.local_class
.global
760 if v
.local_class
.global
.visibility_level
>= 3 then
761 # Method of private classes are private
764 glob
.visibility_level
= visibility_level
766 v
.error
(self, "Error: No property {prop.local_class}::{prop} is inherited. Remove the redef keyword to define a new property.")
768 if glob
.is_attribute
then
769 if gbc
.is_interface
then
770 v
.error
(self, "Error: Attempt to define attribute {prop} in the interface {prop.local_class}.")
771 else if gbc
.is_universal
then
772 v
.error
(self, "Error: Attempt to define attribute {prop} in the universal class {prop.local_class}.")
774 else if glob
.is_init
then
775 if gbc
.is_interface
then
776 v
.error
(self, "Error: Attempt to define a constructor {prop} in the class {prop.local_class}.")
777 else if gbc
.is_universal
then
778 v
.error
(self, "Error: Attempt to define a constructor {prop} in the universal {prop.local_class}.")
781 if prop
.signature
== null then
783 var supers
= prop
.local_class
.super_methods_named
(prop
.name
)
784 inherit_signature
(v
, prop
, supers
)
786 if prop
.signature
!= null then
788 else if not v
.signature_builder
.untyped_params
.is_empty
then
789 v
.error
(v
.signature_builder
.untyped_params
.first
, "Error: Untyped parameter.")
791 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
796 private meth inherit_signature
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, supers
: Array[MMLocalProperty])
798 var s
= prop
.signature
800 var isig
= ip
.signature
.adaptation_to
(v
.local_class
.get_type
)
803 if v
.signature_builder
.params
.length
!= isig
.arity
then
804 #prop.node.printl("v.params.length {v.params.length} != isig.arity {isig.arity} ; {prop.full_name} vs {ip.full_name}")
807 for p
in v
.signature_builder
.params
do
808 var t
= isig
[p
.position
]
810 if p
.position
== isig
.vararg_rank
then
822 # The part of process_and_check when prop is a redefinition
823 private meth do_and_check_redef
(v
: PropertyVerifierVisitor, prop
: MMLocalProperty, has_redef
: Bool, visibility_level
: Int)
825 var is_init
= self isa AConcreteInitPropdef
826 var glob
= prop
.global
828 if not has_redef
then
829 v
.error
(self, "Redef error: {prop.local_class}::{prop} is an inherited property. To redefine it, add the redef keyword.")
832 if glob
.is_init
and not is_init
then
833 v
.error
(self, "Redef error: A method {prop.local_class}::{prop} cannot redefine a constructor.")
834 else if not glob
.is_init
and is_init
then
835 v
.error
(self, "Redef error: A constructor {prop.local_class}::{prop} cannot redefine a method.")
838 var s
= prop
.signature
839 #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}"
840 for i
in prop
.prhe
.direct_greaters
do
841 var ip
= i
.local_class
[prop
.global
]
842 var isig
= i
.signature
.adaptation_to
(v
.local_class
.get_type
)
845 #print "{prop.full_name} inherits signature from {ip.full_name}"
846 if v
.signature_builder
.params
.length
!= isig
.arity
then
847 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
850 for p
in v
.signature_builder
.params
do
851 var t
= isig
[p
.position
]
853 if p
.position
== isig
.vararg_rank
then
862 #print "orig signature: {i.signature.recv} . {i.signature}"
863 #print "inh signature: {isig.recv} . {isig}"
864 #print "redef signature: {s.recv} . {s}"
866 if glob
.is_init
and i
.local_class
.global
!= prop
.local_class
.global
then
867 # Do not check signature
868 else if s
.arity
!= isig
.arity
then
869 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefines {ip.local_class}::{ip} with {isig.arity} parameter(s).")
871 for i
in [0..s
.arity
[ do
872 if s
[i
] != isig
[i
] then
873 v
.error
(self, "Redef error: Expected {isig[i]} (as in {ip.local_class}::{ip}), got {s[i]} in {prop.local_class}::{prop}.")
878 var srt
= s
.return_type
879 var isrt
= isig
.return_type
880 if srt
== null and isrt
!= null then
881 v
.error
(self, "Redef error: The procedure {prop.local_class}::{prop} redefines the function {ip.local_class}::{ip}.")
882 else if srt
!= null and isrt
== null then
883 v
.error
(self, "Redef error: The function {prop.local_class}::{prop} redefines the procedure {ip.local_class}::{ip}.")
884 else if srt
!= null and isrt
!= null and not srt
< isrt
then
885 v
.error
(self, "Redef error: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
886 else if srt
!= null and isrt
!= null and srt
!= isrt
and prop
isa MMAttribute then
888 v
.warning
(self, "Redef warning: Expected {isrt} (as in {ip.local_class}::{ip}), got {srt} in {prop.local_class}::{prop}.")
892 if visibility_level
!= 1 and glob
.visibility_level
!= visibility_level
then
893 v
.error
(self, "Redef error: {prop.local_class}::{prop} redefinition cannot change visibility.")
895 glob
.check_visibility
(v
, self, v
.module, true)
899 redef class AAttrPropdef
900 redef readable attr _readmethod
: MMSrcMethod
901 redef readable attr _writemethod
: MMSrcMethod
902 redef readable attr _prop
: MMSrcAttribute
904 redef meth accept_property_builder
(v
)
907 var name
= n_id
.to_symbol
908 var prop
= new MMSrcAttribute(name
, v
.local_class
, self)
910 v
.local_class
.add_src_local_property
(v
, prop
)
912 if n_readable
!= null then
913 name
= n_id
.text
.substring_from
(1).to_symbol
914 _readmethod
= new MMReadImplementationMethod(name
, v
.local_class
, self)
915 v
.local_class
.add_src_local_property
(v
, _readmethod
)
917 if n_writable
!= null then
918 name
= (n_id
.text
.substring_from
(1) + "=").to_symbol
919 _writemethod
= new MMWriteImplementationMethod(name
, v
.local_class
, self)
920 v
.local_class
.add_src_local_property
(v
, _writemethod
)
924 redef meth accept_property_verifier
(v
)
928 if n_type
!= null then
929 t
= n_type
.get_stype
(v
)
931 v
.error
(self, "Not yet implemented: Attribute definition {_prop.local_class}::{_prop} requires an explicit type.")
935 var signature
= new MMSignature(new Array[MMType], t
, v
.local_class
.get_type
)
936 _prop
.signature
= signature
937 var visibility_level
= n_visibility
.level
938 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
939 if n_readable
!= null then
940 _readmethod
.signature
= signature
941 process_and_check
(v
, _readmethod
, n_readable
.n_kwredef
!= null, visibility_level
)
942 n_type
.check_visibility
(v
, _readmethod
)
944 if n_writable
!= null then
945 _writemethod
.signature
= new MMSignature(new Array[MMType].with_items
(t
), null, v
.local_class
.get_type
)
946 process_and_check
(v
, _writemethod
, n_writable
.n_kwredef
!= null, visibility_level
)
947 n_type
.check_visibility
(v
, _writemethod
)
951 redef meth accept_abs_syntax_visitor
(v
)
953 v
.local_property
= prop
955 v
.local_property
= null
959 redef class AMethPropdef
961 readable attr _name
: Symbol
963 redef readable attr _method
: MMMethSrcMethod
965 redef meth accept_property_builder
(v
)
968 if n_methid
== null then
969 if self isa AConcreteInitPropdef then
970 _name
= once
"init".to_symbol
972 _name
= once
"main".to_symbol
975 _name
= n_methid
.name
976 # FIXME: Add the 'unary' keyword
977 if n_methid
.name
== (once
"-".to_symbol
) then
979 if ns
isa ASignature and ns
.n_params
.length
== 0 then
980 _name
= once
"unary -".to_symbol
984 var prop
= new MMMethSrcMethod(_name
, v
.local_class
, self)
986 v
.local_class
.add_src_local_property
(v
, prop
)
989 redef meth accept_property_verifier
(v
)
991 v
.signature_builder
= new SignatureBuilder
994 if v
.signature_builder
.signature
== null then
995 #_method.signature = new MMSignature(new Array[MMType], null, v.local_class.get_type)
997 _method
.signature
= v
.signature_builder
.signature
999 var visibility_level
= 1
1000 if n_visibility
!= null and n_visibility
.level
> 1 then
1001 visibility_level
= n_visibility
.level
1003 process_and_check
(v
, _method
, n_kwredef
!= null, visibility_level
)
1004 if n_signature
!= null then n_signature
.check_visibility
(v
, _method
)
1007 redef meth accept_abs_syntax_visitor
(v
)
1009 v
.local_property
= method
1011 v
.local_property
= null
1015 redef class AMainMethPropdef
1016 redef meth process_and_check
(v
, prop
, has_redef
, visibility_level
)
1018 prop
.global
.visibility_level
= visibility_level
1019 prop
.signature
= new MMSignature(new Array[MMType], null, v
.local_class
.get_type
)
1020 # Disable all checks for main
1024 redef class ATypePropdef
1025 redef readable attr _prop
: MMSrcTypeProperty
1027 redef meth accept_property_builder
(v
)
1030 var name
= n_id
.to_symbol
1031 var prop
= new MMSrcTypeProperty(name
, v
.local_class
, self)
1033 v
.local_class
.add_src_local_property
(v
, prop
)
1036 redef meth accept_property_verifier
(v
)
1039 var signature
= new MMSignature(new Array[MMType], n_type
.get_stype
(v
), v
.local_class
.get_type
)
1040 _prop
.signature
= signature
1041 var visibility_level
= n_visibility
.level
1042 process_and_check
(v
, _prop
, n_kwredef
!= null, visibility_level
)
1045 redef meth accept_abs_syntax_visitor
(v
)
1047 v
.local_property
= prop
1049 v
.local_property
= null
1053 # Visitor used to build a full method name from multiple tokens
1054 private class MethidAccumulator
1056 readable attr _name
: String
1060 _name
.append
(n
.text
)
1074 readable attr _name
: Symbol
1076 redef meth accept_property_builder
(v
)
1078 var accumulator
= new MethidAccumulator
1079 accumulator
.visit
(self)
1080 _name
= accumulator
.name
.to_symbol
1085 redef class PSignature
1086 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1087 meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1090 redef class ASignature
1091 redef meth accept_property_verifier
(v
)
1094 if not v
.signature_builder
.untyped_params
.is_empty
then
1095 if v
.signature_builder
.untyped_params
.first
!= v
.signature_builder
.params
.first
or n_type
!= null then
1096 v
.error
(v
.signature_builder
.untyped_params
.first
, "Syntax error: untyped parameter.")
1099 else if not v
.signature_builder
.params
.is_empty
or n_type
!= null then
1100 var pars
= new Array[MMType]
1101 for p
in v
.signature_builder
.params
do
1104 var ret
: MMType = null
1105 if n_type
!= null then
1106 ret
= n_type
.get_stype
(v
)
1108 v
.signature_builder
.signature
= new MMSignature(pars
, ret
, v
.local_class
.get_type
)
1109 if v
.signature_builder
.vararg_rank
>= 0 then
1110 v
.signature_builder
.signature
.vararg_rank
= v
.signature_builder
.vararg_rank
1115 redef meth check_visibility
(v
, p
)
1117 if p
.global
.visibility_level
>= 3 then return
1118 for n
in n_params
do
1119 if n
.n_type
!= null then n
.n_type
.check_visibility
(v
, p
)
1121 if n_type
!= null then n_type
.check_visibility
(v
, p
)
1126 redef readable attr _position
: Int
1128 redef readable attr _variable
: ParamVariable
1130 # The type of the parameter in signature
1131 readable writable attr _stype
: MMType
1133 redef meth accept_property_verifier
(v
)
1136 _position
= v
.signature_builder
.params
.length
1137 _variable
= new ParamVariable(n_id
.to_symbol
, self)
1138 v
.signature_builder
.params
.add
(self)
1139 v
.signature_builder
.untyped_params
.add
(self)
1140 if n_type
!= null then
1141 var stype
= n_type
.get_stype
(v
)
1142 for p
in v
.signature_builder
.untyped_params
do
1145 if v
.signature_builder
.vararg_rank
== -1 then
1146 v
.signature_builder
.vararg_rank
= p
.position
1148 v
.error
(self, "Error: A vararg parameter is already defined.")
1150 stype
= v
.type_array
(stype
)
1152 p
.variable
.stype
= stype
1154 v
.signature_builder
.untyped_params
.clear
1158 meth is_vararg
: Bool is abstract
1162 redef meth is_vararg
do return n_dotdotdot
!= null
1166 # Check that visibilities of types in the signature are compatible with the visibility of the property.
1167 private meth check_visibility
(v
: AbsSyntaxVisitor, p
: MMLocalProperty) is abstract
1171 redef meth check_visibility
(v
, p
)
1173 if p
.global
.visibility_level
>= 3 then return
1174 var t
= get_stype
(v
)
1175 if t
== null then return
1176 var bc
= t
.local_class
1177 if bc
== null then return
1178 if bc
.global
.visibility_level
>= 3 then
1179 v
.error
(self, "Access error: Class {bc} is private and cannot be used in the signature of the non-private property {p}.")
1182 n
.check_visibility
(v
, p
)
1188 redef meth accept_class_builder
(v
) do end
1189 redef meth accept_property_builder
(v
) do end
1190 redef meth accept_property_verifier
(v
) do end