1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 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 # Load nit source files and build the associated model
21 # FIXME split this module into submodules
22 # FIXME add missing error checks
33 redef class ToolContext
35 readable var _opt_path
: OptionArray = new OptionArray("Set include path for loaders (may be used more than once)", "-I", "--path")
37 # Option --only-metamodel
38 readable var _opt_only_metamodel
: OptionBool = new OptionBool("Stop after meta-model processing", "--only-metamodel")
41 readable var _opt_only_parse
: OptionBool = new OptionBool("Only proceed to parse step of loaders", "--only-parse")
46 option_context
.add_option
(opt_path
, opt_only_parse
, opt_only_metamodel
)
50 # A model builder knows how to load nit source files and build the associated model
51 # The important function is `parse_and_build' that does all the job.
52 # The others function can be used for specific tasks
54 # The model where new modules, classes and properties are added
57 # The toolcontext used to control the interaction with the user (getting options and displaying messages)
58 var toolcontext
: ToolContext
60 # Instantiate a modelbuilder for a model and a toolcontext
61 # Important, the options of the toolcontext must be correctly set (parse_option already called)
62 init(model
: Model, toolcontext
: ToolContext)
65 self.toolcontext
= toolcontext
67 # Setup the paths value
68 paths
.append
(toolcontext
.opt_path
.value
)
70 var path_env
= "NIT_PATH".environ
71 if not path_env
.is_empty
then
72 paths
.append
(path_env
.split_with
(':'))
75 path_env
= "NIT_DIR".environ
76 if not path_env
.is_empty
then
77 var libname
= "{path_env}/lib"
78 if libname
.file_exists
then paths
.add
(libname
)
81 var libname
= "{sys.program_name.dirname}/../lib"
82 if libname
.file_exists
then paths
.add
(libname
.simplify_path
)
85 # Load and analyze a bunch of modules.
86 # `modules' can contains filenames or module names.
87 # Imported modules are automatically loaded, builds and analysed.
88 # The result is the corresponding built modules.
89 # Errors and warnings are printed with the toolcontext.
91 # FIXME: Maybe just let the client do the loop (instead of playing with Sequences)
92 fun parse_and_build
(modules
: Sequence[String]): Array[MModule]
95 # Parse and recursively load
96 self.toolcontext
.info
("*** PARSE ***", 1)
97 var mmodules
= new Array[MModule]
99 var nmodule
= self.load_module
(null, a
)
100 if nmodule
== null then continue # Skip error
101 mmodules
.add
(nmodule
.mmodule
.as(not null))
104 self.toolcontext
.info
("*** END PARSE: {time1-time0} ***", 2)
106 self.toolcontext
.check_errors
108 if self.toolcontext
.opt_only_parse
.value
then
109 self.toolcontext
.info
("--only-parse: stop processing", 2)
110 return new Array[MModule]
114 self.toolcontext
.info
("*** BUILD MODEL ***", 1)
115 self.build_all_classes
117 self.toolcontext
.info
("*** END BUILD MODEL: {time2-time1} ***", 2)
119 self.toolcontext
.check_errors
124 # Return a class named `name' visible by the module `mmodule'.
125 # Visibility in modules is correctly handled.
126 # If no such a class exists, then null is returned.
127 # If more than one class exists, then an error on `anode' is displayed and null is returned.
128 # FIXME: add a way to handle class name conflict
129 fun try_get_mclass_by_name
(anode
: ANode, mmodule
: MModule, name
: String): nullable MClass
131 var classes
= model
.get_mclasses_by_name
(name
)
132 if classes
== null then
136 var res
: nullable MClass = null
137 for mclass
in classes
do
138 if not mmodule
.in_importation
<= mclass
.intro_mmodule
then continue
139 if not mmodule
.is_visible
(mclass
.intro_mmodule
, mclass
.visibility
) then continue
143 error
(anode
, "Ambigous class name '{name}'; conflict between {mclass.full_name} and {res.full_name}")
150 # Return a property named `name' on the type `mtype' visible in the module `mmodule'.
151 # Visibility in modules is correctly handled.
152 # Protected properties are returned (it is up to the caller to check and reject protected properties).
153 # If no such a property exists, then null is returned.
154 # If more than one property exists, then an error on `anode' is displayed and null is returned.
155 # FIXME: add a way to handle property name conflict
156 fun try_get_mproperty_by_name2
(anode
: ANode, mmodule
: MModule, mtype
: MType, name
: String): nullable MProperty
158 var props
= self.model
.get_mproperties_by_name
(name
)
159 if props
== null then
163 var cache
= self.try_get_mproperty_by_name2_cache
[mmodule
, mtype
, name
]
164 if cache
!= null then return cache
166 var res
: nullable MProperty = null
167 var ress
: nullable Array[MProperty] = null
168 for mprop
in props
do
169 if not mtype
.has_mproperty
(mmodule
, mprop
) then continue
170 if not mmodule
.is_visible
(mprop
.intro_mclassdef
.mmodule
, mprop
.visibility
) then continue
174 var restype
= res
.intro_mclassdef
.bound_mtype
175 var mproptype
= mprop
.intro_mclassdef
.bound_mtype
176 if restype
.is_subtype
(mmodule
, null, mproptype
) then
178 else if mproptype
.is_subtype
(mmodule
, null, restype
) then
181 if ress
== null then ress
= new Array[MProperty]
187 var restype
= res
.intro_mclassdef
.bound_mtype
189 var mproptype
= mprop
.intro_mclassdef
.bound_mtype
190 if not restype
.is_subtype
(mmodule
, null, mproptype
) then
191 self.error
(anode
, "Ambigous property name '{name}' for {mtype}; conflict between {mprop.full_name} and {res.full_name}")
197 self.try_get_mproperty_by_name2_cache
[mmodule
, mtype
, name
] = res
201 private var try_get_mproperty_by_name2_cache
: HashMap3[MModule, MType, String, nullable MProperty] = new HashMap3[MModule, MType, String, nullable MProperty]
204 # Alias for try_get_mproperty_by_name2(anode, mclassdef.mmodule, mclassdef.mtype, name)
205 fun try_get_mproperty_by_name
(anode
: ANode, mclassdef
: MClassDef, name
: String): nullable MProperty
207 return try_get_mproperty_by_name2
(anode
, mclassdef
.mmodule
, mclassdef
.bound_mtype
, name
)
210 # The list of directories to search for top level modules
211 # The list is initially set with :
212 # * the toolcontext --path option
213 # * the NIT_PATH environment variable
214 # * some heuristics including the NIT_DIR environment variable and the progname of the process
215 # Path can be added (or removed) by the client
216 var paths
: Array[String] = new Array[String]
218 # Get a module by its short name; if required, the module is loaded, parsed and its hierarchies computed.
219 # If `mmodule' is set, then the module search starts from it up to the top level (see `paths');
220 # if `mmodule' is null then the module is searched in the top level only.
221 # If no module exists or there is a name conflict, then an error on `anode' is displayed and null is returned.
222 # FIXME: add a way to handle module name conflict
223 fun get_mmodule_by_name
(anode
: ANode, mmodule
: nullable MModule, name
: String): nullable MModule
225 var origmmodule
= mmodule
226 var modules
= model
.get_mmodules_by_name
(name
)
228 var tries
= new Array[String]
230 var lastmodule
= mmodule
231 while mmodule
!= null do
232 var dirname
= mmodule
.location
.file
.filename
.dirname
234 # Determine the owner
235 var owner
: nullable MModule
236 if dirname
.basename
("") != mmodule
.name
then
237 owner
= mmodule
.direct_owner
242 # First, try the already known nested modules
243 if modules
!= null then
244 for candidate
in modules
do
245 if candidate
.direct_owner
== owner
then
251 # Second, try the directory to find a file
252 var try_file
= dirname
+ "/" + name
+ ".nit"
254 if try_file
.file_exists
then
255 var res
= self.load_module
(owner
, try_file
.simplify_path
)
256 if res
== null then return null # Forward error
257 return res
.mmodule
.as(not null)
260 # Third, try if the requested module is itself an owner
261 try_file
= dirname
+ "/" + name
+ "/" + name
+ ".nit"
262 if try_file
.file_exists
then
263 var res
= self.load_module
(owner
, try_file
.simplify_path
)
264 if res
== null then return null # Forward error
265 return res
.mmodule
.as(not null)
269 mmodule
= mmodule
.direct_owner
272 if modules
!= null then
273 for candidate
in modules
do
274 if candidate
.direct_owner
== null then
280 # Look at some known directories
281 var lookpaths
= self.paths
283 # Look in the directory of the last module also (event if not in the path)
284 if lastmodule
!= null then
285 var dirname
= lastmodule
.location
.file
.filename
.dirname
286 if dirname
.basename
("") == lastmodule
.name
then
287 dirname
= dirname
.dirname
289 if not lookpaths
.has
(dirname
) then
290 lookpaths
= lookpaths
.to_a
291 lookpaths
.add
(dirname
)
295 var candidate
: nullable String = null
296 for dirname
in lookpaths
do
297 var try_file
= (dirname
+ "/" + name
+ ".nit").simplify_path
299 if try_file
.file_exists
then
300 if candidate
== null then
302 else if candidate
!= try_file
then
303 error
(anode
, "Error: conflicting module file for {name}: {candidate} {try_file}")
306 try_file
= (dirname
+ "/" + name
+ "/" + name
+ ".nit").simplify_path
307 if try_file
.file_exists
then
308 if candidate
== null then
310 else if candidate
!= try_file
then
311 error
(anode
, "Error: conflicting module file for {name}: {candidate} {try_file}")
315 if candidate
== null then
316 if origmmodule
!= null then
317 error
(anode
, "Error: cannot find module {name} from {origmmodule}. tried {tries.join(", ")}")
319 error
(anode
, "Error: cannot find module {name}. tried {tries.join(", ")}")
323 var res
= self.load_module
(mmodule
, candidate
)
324 if res
== null then return null # Forward error
325 return res
.mmodule
.as(not null)
328 # Try to load a module using a path.
329 # Display an error if there is a problem (IO / lexer / parser) and return null
330 # Note: usually, you do not need this method, use `get_mmodule_by_name` instead.
331 fun load_module
(owner
: nullable MModule, filename
: String): nullable AModule
333 if not filename
.file_exists
then
334 self.toolcontext
.error
(null, "Error: file {filename} not found.")
338 var x
= if owner
!= null then owner
.to_s
else "."
339 self.toolcontext
.info
("load module {filename} in {x}", 2)
342 var file
= new IFStream.open
(filename
)
343 var lexer
= new Lexer(new SourceFile(filename
, file
))
344 var parser
= new Parser(lexer
)
345 var tree
= parser
.parse
348 # Handle lexer and parser error
349 var nmodule
= tree
.n_base
350 if nmodule
== null then
351 var neof
= tree
.n_eof
352 assert neof
isa AError
353 error
(neof
, neof
.message
)
357 # Check the module name
358 var mod_name
= filename
.basename
(".nit")
359 var decl
= nmodule
.n_moduledecl
361 #warning(nmodule, "Warning: Missing 'module' keyword") #FIXME: NOT YET FOR COMPATIBILITY
363 var decl_name
= decl
.n_name
.n_id
.text
364 if decl_name
!= mod_name
then
365 error
(decl
.n_name
, "Error: module name missmatch; declared {decl_name} file named {mod_name}")
370 var mmodule
= new MModule(model
, owner
, mod_name
, nmodule
.location
)
371 nmodule
.mmodule
= mmodule
372 nmodules
.add
(nmodule
)
373 self.mmodule2nmodule
[mmodule
] = nmodule
375 build_module_importation
(nmodule
)
380 # Analysis the module importation and fill the module_importation_hierarchy
381 private fun build_module_importation
(nmodule
: AModule)
383 if nmodule
.is_importation_done
then return
384 var mmodule
= nmodule
.mmodule
.as(not null)
386 var imported_modules
= new Array[MModule]
387 for aimport
in nmodule
.n_imports
do
389 if not aimport
isa AStdImport then
392 var mod_name
= aimport
.n_name
.n_id
.text
393 var sup
= self.get_mmodule_by_name
(aimport
.n_name
, mmodule
, mod_name
)
394 if sup
== null then continue # Skip error
395 imported_modules
.add
(sup
)
396 var mvisibility
= aimport
.n_visibility
.mvisibility
397 mmodule
.set_visibility_for
(sup
, mvisibility
)
400 var mod_name
= "standard"
401 var sup
= self.get_mmodule_by_name
(nmodule
, null, mod_name
)
402 if sup
!= null then # Skip error
403 imported_modules
.add
(sup
)
404 mmodule
.set_visibility_for
(sup
, public_visibility
)
407 self.toolcontext
.info
("{mmodule} imports {imported_modules.join(", ")}", 3)
408 mmodule
.set_imported_mmodules
(imported_modules
)
409 nmodule
.is_importation_done
= true
412 # All the loaded modules
413 var nmodules
: Array[AModule] = new Array[AModule]
415 # Build the classes of all modules `nmodules'.
416 private fun build_all_classes
418 for nmodule
in self.nmodules
do
419 build_classes
(nmodule
)
423 # Visit the AST and create the MClass objects
424 private fun build_a_mclass
(nmodule
: AModule, nclassdef
: AClassdef)
426 var mmodule
= nmodule
.mmodule
.as(not null)
429 var nkind
: nullable AClasskind
430 var mkind
: MClassKind
431 var nvisibility
: nullable AVisibility
432 var mvisibility
: nullable MVisibility
434 if nclassdef
isa AStdClassdef then
435 name
= nclassdef
.n_id
.text
436 nkind
= nclassdef
.n_classkind
438 nvisibility
= nclassdef
.n_visibility
439 mvisibility
= nvisibility
.mvisibility
440 arity
= nclassdef
.n_formaldefs
.length
441 else if nclassdef
isa ATopClassdef then
444 mkind
= interface_kind
446 mvisibility
= public_visibility
447 else if nclassdef
isa AMainClassdef then
450 mkind
= concrete_kind
452 mvisibility
= public_visibility
457 var mclass
= try_get_mclass_by_name
(nclassdef
, mmodule
, name
)
458 if mclass
== null then
459 mclass
= new MClass(mmodule
, name
, arity
, mkind
, mvisibility
)
460 #print "new class {mclass}"
461 else if nclassdef
isa AStdClassdef and nclassdef
.n_kwredef
== null then
462 error
(nclassdef
, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
464 else if mclass
.arity
!= arity
then
465 error
(nclassdef
, "Redef error: Formal parameter arity missmatch; got {arity}, expected {mclass.arity}.")
467 else if nkind
!= null and mkind
!= concrete_kind
and mclass
.kind
!= mkind
then
468 error
(nkind
, "Error: refinement changed the kind from a {mclass.kind} to a {mkind}")
469 else if nvisibility
!= null and mvisibility
!= public_visibility
and mclass
.visibility
!= mvisibility
then
470 error
(nvisibility
, "Error: refinement changed the visibility from a {mclass.visibility} to a {mvisibility}")
472 nclassdef
.mclass
= mclass
475 # Visit the AST and create the MClassDef objects
476 private fun build_a_mclassdef
(nmodule
: AModule, nclassdef
: AClassdef)
478 var mmodule
= nmodule
.mmodule
.as(not null)
479 var objectclass
= try_get_mclass_by_name
(nmodule
, mmodule
, "Object")
480 var mclass
= nclassdef
.mclass
.as(not null)
481 #var mclassdef = nclassdef.mclassdef.as(not null)
483 var names
= new Array[String]
484 var bounds
= new Array[MType]
485 if nclassdef
isa AStdClassdef and mclass
.arity
> 0 then
486 # Collect formal parameter names
487 for i
in [0..mclass
.arity
[ do
488 var nfd
= nclassdef
.n_formaldefs
[i
]
489 var ptname
= nfd
.n_id
.text
490 if names
.has
(ptname
) then
491 error
(nfd
, "Error: A formal parameter type `{ptname}' already exists")
497 # Revolve bound for formal parameter names
498 for i
in [0..mclass
.arity
[ do
499 var nfd
= nclassdef
.n_formaldefs
[i
]
500 var nfdt
= nfd
.n_type
502 var bound
= resolve_mtype
(nclassdef
, nfdt
)
503 if bound
== null then return # Forward error
504 if bound
.need_anchor
then
506 error
(nfd
, "Error: Formal parameter type `{names[i]}' bounded with a formal parameter type")
510 else if mclass
.mclassdefs
.is_empty
then
511 # No bound, then implicitely bound by nullable Object
512 bounds
.add
(objectclass
.mclass_type
.as_nullable
)
515 bounds
.add
(mclass
.mclassdefs
.first
.bound_mtype
.as(MGenericType).arguments
[i
])
520 var bound_mtype
= mclass
.get_mtype
(bounds
)
521 var mclassdef
= new MClassDef(mmodule
, bound_mtype
, nclassdef
.location
, names
)
522 nclassdef
.mclassdef
= mclassdef
523 self.mclassdef2nclassdef
[mclassdef
] = nclassdef
525 if mclassdef
.is_intro
then
526 self.toolcontext
.info
("{mclassdef} introduces new {mclass.kind} {mclass.full_name}", 3)
528 self.toolcontext
.info
("{mclassdef} refine {mclass.kind} {mclass.full_name}", 3)
532 # Visit the AST and set the super-types of the MClass objects (ie compute the inheritance)
533 private fun build_a_mclassdef_inheritance
(nmodule
: AModule, nclassdef
: AClassdef)
535 var mmodule
= nmodule
.mmodule
.as(not null)
536 var objectclass
= try_get_mclass_by_name
(nmodule
, mmodule
, "Object")
537 var mclass
= nclassdef
.mclass
.as(not null)
538 var mclassdef
= nclassdef
.mclassdef
.as(not null)
540 var specobject
= true
541 var supertypes
= new Array[MClassType]
542 if nclassdef
isa AStdClassdef then
543 for nsc
in nclassdef
.n_superclasses
do
545 var ntype
= nsc
.n_type
546 var mtype
= resolve_mtype
(nclassdef
, ntype
)
547 if mtype
== null then continue # Skip because of error
548 if not mtype
isa MClassType then
549 error
(ntype
, "Error: supertypes cannot be a formal type")
553 #print "new super : {mclass} < {mtype}"
556 if specobject
and mclass
.name
!= "Object" and objectclass
!= null and mclassdef
.is_intro
then
557 supertypes
.add objectclass
.mclass_type
560 mclassdef
.set_supertypes
(supertypes
)
561 if not supertypes
.is_empty
then self.toolcontext
.info
("{mclassdef} new super-types: {supertypes.join(", ")}", 3)
564 # Check the validity of the specialization heirarchy
565 # FIXME Stub implementation
566 private fun check_supertypes
(nmodule
: AModule, nclassdef
: AClassdef)
568 var mmodule
= nmodule
.mmodule
.as(not null)
569 var objectclass
= try_get_mclass_by_name
(nmodule
, mmodule
, "Object")
570 var mclass
= nclassdef
.mclass
.as(not null)
571 var mclassdef
= nclassdef
.mclassdef
.as(not null)
574 # Build the classes of the module `nmodule'.
575 # REQUIRE: classes of imported modules are already build. (let `build_all_classes' do the job)
576 private fun build_classes
(nmodule
: AModule)
578 # Force building recursively
579 if nmodule
.build_classes_is_done
then return
580 var mmodule
= nmodule
.mmodule
.as(not null)
581 for imp
in mmodule
.in_importation
.direct_greaters
do
582 build_classes
(mmodule2nmodule
[imp
])
586 for nclassdef
in nmodule
.n_classdefs
do
587 self.build_a_mclass
(nmodule
, nclassdef
)
590 # Create all classdefs
591 for nclassdef
in nmodule
.n_classdefs
do
592 self.build_a_mclassdef
(nmodule
, nclassdef
)
595 # Create inheritance on all classdefs
596 for nclassdef
in nmodule
.n_classdefs
do
597 self.build_a_mclassdef_inheritance
(nmodule
, nclassdef
)
600 # TODO: Check that the super-class is not intrusive
602 # TODO: Check that the super-class is not already known (by transitivity)
604 for nclassdef
in nmodule
.n_classdefs
do
605 self.build_properties
(nclassdef
)
608 nmodule
.build_classes_is_done
= true
611 # Register the nmodule associated to each mmodule
612 # FIXME: why not refine the MModule class with a nullable attribute?
613 var mmodule2nmodule
: HashMap[MModule, AModule] = new HashMap[MModule, AModule]
614 # Register the nclassdef associated to each mclassdef
615 # FIXME: why not refine the MClassDef class with a nullable attribute?
616 var mclassdef2nclassdef
: HashMap[MClassDef, AClassdef] = new HashMap[MClassDef, AClassdef]
617 # Register the npropdef associated to each mpropdef
618 # FIXME: why not refine the MPropDef class with a nullable attribute?
619 var mpropdef2npropdef
: HashMap[MPropDef, APropdef] = new HashMap[MPropDef, APropdef]
621 # Build the properties of `nclassdef'.
622 # REQUIRE: all superclasses are built.
623 private fun build_properties
(nclassdef
: AClassdef)
625 # Force building recursively
626 if nclassdef
.build_properties_is_done
then return
627 var mclassdef
= nclassdef
.mclassdef
.as(not null)
628 if mclassdef
.in_hierarchy
== null then return # Skip error
629 for superclassdef
in mclassdef
.in_hierarchy
.direct_greaters
do
630 build_properties
(mclassdef2nclassdef
[superclassdef
])
633 for npropdef
in nclassdef
.n_propdefs
do
634 npropdef
.build_property
(self, nclassdef
)
636 for npropdef
in nclassdef
.n_propdefs
do
637 npropdef
.build_signature
(self, nclassdef
)
639 for npropdef
in nclassdef
.n_propdefs
do
640 npropdef
.check_signature
(self, nclassdef
)
642 process_default_constructors
(nclassdef
)
643 nclassdef
.build_properties_is_done
= true
646 # Introduce or inherit default constructor
647 # This is the last part of `build_properties'.
648 private fun process_default_constructors
(nclassdef
: AClassdef)
650 var mclassdef
= nclassdef
.mclassdef
.as(not null)
652 # Are we a refinement
653 if not mclassdef
.is_intro
then return
655 # Is the class forbid constructors?
656 if not mclassdef
.mclass
.kind
.need_init
then return
658 # Is there already a constructor defined?
659 for mpropdef
in mclassdef
.mpropdefs
do
660 if not mpropdef
isa MMethodDef then continue
661 if mpropdef
.mproperty
.is_init
then return
664 if not nclassdef
isa AStdClassdef then return
666 var mmodule
= nclassdef
.mclassdef
.mmodule
667 # Do we inherit for a constructor?
668 var combine
= new Array[MMethod]
669 var inhc
: nullable MClass = null
670 for st
in mclassdef
.supertypes
do
672 if not c
.kind
.need_init
then continue
673 st
= st
.anchor_to
(mmodule
, nclassdef
.mclassdef
.bound_mtype
)
674 var candidate
= self.try_get_mproperty_by_name2
(nclassdef
, mmodule
, st
, "init").as(nullable MMethod)
675 if candidate
!= null and candidate
.intro
.msignature
.arity
== 0 then
676 combine
.add
(candidate
)
679 var inhc2
= c
.inherit_init_from
680 if inhc2
== null then inhc2
= c
681 if inhc2
== inhc
then continue
683 self.error
(nclassdef
, "Cannot provide a defaut constructor: conflict for {inhc} and {c}")
688 if combine
.is_empty
and inhc
!= null then
689 # TODO: actively inherit the consturctor
690 self.toolcontext
.info
("{mclassdef} inherits all constructors from {inhc}", 3)
691 mclassdef
.mclass
.inherit_init_from
= inhc
694 if not combine
.is_empty
and inhc
!= null then
695 self.error
(nclassdef
, "Cannot provide a defaut constructor: conflict for {combine.join(", ")} and {inhc}")
699 if not combine
.is_empty
then
700 nclassdef
.super_inits
= combine
701 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
702 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
703 var param_names
= new Array[String]
704 var param_types
= new Array[MType]
705 var msignature
= new MSignature(param_names
, param_types
, null, -1)
706 mpropdef
.msignature
= msignature
708 nclassdef
.mfree_init
= mpropdef
709 self.toolcontext
.info
("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
713 # Collect undefined attributes
714 var param_names
= new Array[String]
715 var param_types
= new Array[MType]
716 for npropdef
in nclassdef
.n_propdefs
do
717 if npropdef
isa AAttrPropdef and npropdef
.n_expr
== null then
718 param_names
.add
(npropdef
.mpropdef
.mproperty
.name
.substring_from
(1))
719 var ret_type
= npropdef
.mpropdef
.static_mtype
720 if ret_type
== null then return
721 param_types
.add
(ret_type
)
725 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
726 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
727 var msignature
= new MSignature(param_names
, param_types
, null, -1)
728 mpropdef
.msignature
= msignature
730 nclassdef
.mfree_init
= mpropdef
731 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
734 # Return the static type associated to the node `ntype'.
735 # `classdef' is the context where the call is made (used to understand formal types)
736 # The mmodule used as context is `nclassdef.mmodule'
737 # In case of problem, an error is displayed on `ntype' and null is returned.
738 # FIXME: the name "resolve_mtype" is awful
739 fun resolve_mtype
(nclassdef
: AClassdef, ntype
: AType): nullable MType
741 var name
= ntype
.n_id
.text
742 var mclassdef
= nclassdef
.mclassdef
743 var mmodule
= nclassdef
.parent
.as(AModule).mmodule
.as(not null)
747 if mclassdef
!= null then
748 var prop
= try_get_mproperty_by_name
(ntype
, mclassdef
, name
).as(nullable MVirtualTypeProp)
750 if not ntype
.n_types
.is_empty
then
751 error
(ntype
, "Type error: formal type {name} cannot have formal parameters.")
753 res
= prop
.mvirtualtype
754 if ntype
.n_kwnullable
!= null then res
= res
.as_nullable
759 # Check parameter type
760 if mclassdef
!= null and mclassdef
.parameter_names
.has
(name
) then
761 if not ntype
.n_types
.is_empty
then
762 error
(ntype
, "Type error: formal type {name} cannot have formal parameters.")
764 for i
in [0..mclassdef
.parameter_names
.length
[ do
765 if mclassdef
.parameter_names
[i
] == name
then
766 res
= mclassdef
.mclass
.mclass_type
.as(MGenericType).arguments
[i
]
767 if ntype
.n_kwnullable
!= null then res
= res
.as_nullable
775 var mclass
= try_get_mclass_by_name
(ntype
, mmodule
, name
)
776 if mclass
!= null then
777 var arity
= ntype
.n_types
.length
778 if arity
!= mclass
.arity
then
780 error
(ntype
, "Type error: '{name}' is a generic class.")
781 else if mclass
.arity
== 0 then
782 error
(ntype
, "Type error: '{name}' is not a generic class.")
784 error
(ntype
, "Type error: '{name}' has {mclass.arity} parameters ({arity} are provided).")
789 res
= mclass
.mclass_type
790 if ntype
.n_kwnullable
!= null then res
= res
.as_nullable
793 var mtypes
= new Array[MType]
794 for nt
in ntype
.n_types
do
795 var mt
= resolve_mtype
(nclassdef
, nt
)
796 if mt
== null then return null # Forward error
799 res
= mclass
.get_mtype
(mtypes
)
800 if ntype
.n_kwnullable
!= null then res
= res
.as_nullable
805 # If everything fail, then give up :(
806 error
(ntype
, "Type error: class {name} not found in module {mmodule}.")
810 # Helper function to display an error on a node.
811 # Alias for `self.toolcontext.error(n.hot_location, text)'
812 fun error
(n
: ANode, text
: String)
814 self.toolcontext
.error
(n
.hot_location
, text
)
817 # Helper function to display a warning on a node.
818 # Alias for: `self.toolcontext.warning(n.hot_location, text)'
819 fun warning
(n
: ANode, text
: String)
821 self.toolcontext
.warning
(n
.hot_location
, text
)
826 # The associated MModule once build by a `ModelBuilder'
827 var mmodule
: nullable MModule
828 # Flag that indicate if the importation is already completed
829 var is_importation_done
: Bool = false
830 # Flag that indicate if the class and prop building is already completed
831 var build_classes_is_done
: Bool = false
835 # The class whose self inherit all the constructors.
836 # FIXME: this is needed to implement the crazy constructor mixin thing of the of old compiler. We need to think what to do with since this cannot stay in the modelbuilder
837 var inherit_init_from
: nullable MClass = null
840 redef class AClassdef
841 # The associated MClass once build by a `ModelBuilder'
842 var mclass
: nullable MClass
843 # The associated MClassDef once build by a `ModelBuilder'
844 var mclassdef
: nullable MClassDef
845 var build_properties_is_done
: Bool = false
846 # The list of super-constructor to call at the start of the free constructor
847 # FIXME: this is needed to implement the crazy constructor thing of the of old compiler. We need to think what to do with since this cannot stay in the modelbuilder
848 var super_inits
: nullable Collection[MMethod] = null
850 # The free init (implicitely constructed by the class if required)
851 var mfree_init
: nullable MMethodDef = null
854 redef class AClasskind
855 # The class kind associated with the AST node class
856 private fun mkind
: MClassKind is abstract
858 redef class AConcreteClasskind
859 redef fun mkind
do return concrete_kind
861 redef class AAbstractClasskind
862 redef fun mkind
do return abstract_kind
864 redef class AInterfaceClasskind
865 redef fun mkind
do return interface_kind
867 redef class AEnumClasskind
868 redef fun mkind
do return enum_kind
870 redef class AExternClasskind
871 redef fun mkind
do return extern_kind
874 redef class AVisibility
875 # The visibility level associated with the AST node class
876 private fun mvisibility
: MVisibility is abstract
878 redef class AIntrudeVisibility
879 redef fun mvisibility
do return intrude_visibility
881 redef class APublicVisibility
882 redef fun mvisibility
do return public_visibility
884 redef class AProtectedVisibility
885 redef fun mvisibility
do return protected_visibility
887 redef class APrivateVisibility
888 redef fun mvisibility
do return private_visibility
895 # Join the text of all tokens
896 # Used to get the 'real name' of method definitions.
897 fun collect_text
: String
899 var v
= new TextCollectorVisitor
906 private class TextCollectorVisitor
908 var text
: String = ""
911 if n
isa Token then text
+= n
.text
917 private fun build_property
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
920 private fun build_signature
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
923 private fun check_signature
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
926 private fun new_property_visibility
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef, nvisibility
: nullable AVisibility): MVisibility
928 var mvisibility
= public_visibility
929 if nvisibility
!= null then mvisibility
= nvisibility
.mvisibility
930 if nclassdef
.mclassdef
.mclass
.visibility
== private_visibility
then
931 if mvisibility
== protected_visibility
then
932 assert nvisibility
!= null
933 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
934 else if mvisibility
== private_visibility
then
935 assert nvisibility
!= null
937 # modelbuilder.warning(nvisibility, "Warning: private is unrequired since the only legal visibility for properties in a private class is private.")
939 mvisibility
= private_visibility
944 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef, nvisibility
: nullable AVisibility, mprop
: MProperty)
946 if nvisibility
== null then return
947 var mvisibility
= nvisibility
.mvisibility
948 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
949 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
953 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty)
955 if kwredef
== null then
957 modelbuilder
.error
(self, "Redef error: {nclassdef.mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
960 if not need_redef
then
961 modelbuilder
.error
(self, "Error: No property {nclassdef.mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
967 redef class ASignature
968 # Is the model builder has correctly visited the signature
969 var is_visited
= false
970 # Names of parameters from the AST
971 # REQUIRE: is_visited
972 var param_names
= new Array[String]
973 # Types of parameters from the AST
974 # REQUIRE: is_visited
975 var param_types
= new Array[MType]
976 # Rank of the vararg (of -1 if none)
977 # REQUIRE: is_visited
978 var vararg_rank
: Int = -1
980 var ret_type
: nullable MType = null
982 # Visit and fill information about a signature
983 private fun visit_signature
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef): Bool
985 var param_names
= self.param_names
986 var param_types
= self.param_types
987 for np
in self.n_params
do
988 param_names
.add
(np
.n_id
.text
)
989 var ntype
= np
.n_type
990 if ntype
!= null then
991 var mtype
= modelbuilder
.resolve_mtype
(nclassdef
, ntype
)
992 if mtype
== null then return false # Skip error
993 for i
in [0..param_names
.length-param_types
.length
[ do
994 param_types
.add
(mtype
)
996 if np
.n_dotdotdot
!= null then
997 if self.vararg_rank
!= -1 then
998 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
1001 self.vararg_rank
= param_names
.length
- 1
1006 var ntype
= self.n_type
1007 if ntype
!= null then
1008 self.ret_type
= modelbuilder
.resolve_mtype
(nclassdef
, ntype
)
1009 if self.ret_type
== null then return false # Skip errir
1011 self.is_visited
= true
1016 redef class AMethPropdef
1017 # The associated MMethodDef once build by a `ModelBuilder'
1018 var mpropdef
: nullable MMethodDef
1020 # The associated super init if any
1021 var super_init
: nullable MMethod
1022 redef fun build_property
(modelbuilder
, nclassdef
)
1024 var is_init
= self isa AInitPropdef
1025 var mclassdef
= nclassdef
.mclassdef
.as(not null)
1027 var amethodid
= self.n_methid
1028 var name_node
: ANode
1029 if amethodid
== null then
1030 if self isa AMainMethPropdef then
1033 else if self isa AConcreteInitPropdef then
1035 name_node
= self.n_kwinit
1036 else if self isa AExternInitPropdef then
1038 name_node
= self.n_kwnew
1042 else if amethodid
isa AIdMethid then
1043 name
= amethodid
.n_id
.text
1044 name_node
= amethodid
1046 # operator, bracket or assign
1047 name
= amethodid
.collect_text
1048 name_node
= amethodid
1050 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
1055 var mprop
: nullable MMethod = null
1056 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
1057 if mprop
== null then
1058 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
)
1059 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
1060 mprop
.is_init
= is_init
1061 mprop
.is_new
= self isa AExternInitPropdef
1062 self.check_redef_keyword
(modelbuilder
, nclassdef
, n_kwredef
, false, mprop
)
1064 if n_kwredef
== null then
1065 if self isa AMainMethPropdef then
1068 self.check_redef_keyword
(modelbuilder
, nclassdef
, n_kwredef
, true, mprop
)
1071 check_redef_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
, mprop
)
1074 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
1076 self.mpropdef
= mpropdef
1077 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1078 if mpropdef
.is_intro
then
1079 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 3)
1081 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 3)
1085 redef fun build_signature
(modelbuilder
, nclassdef
)
1087 var mpropdef
= self.mpropdef
1088 if mpropdef
== null then return # Error thus skiped
1089 var mmodule
= mpropdef
.mclassdef
.mmodule
1090 var nsig
= self.n_signature
1092 # Retrieve info from the signature AST
1093 var param_names
= new Array[String] # Names of parameters from the AST
1094 var param_types
= new Array[MType] # Types of parameters from the AST
1095 var vararg_rank
= -1
1096 var ret_type
: nullable MType = null # Return type from the AST
1097 if nsig
!= null then
1098 if not nsig
.visit_signature
(modelbuilder
, nclassdef
) then return
1099 param_names
= nsig
.param_names
1100 param_types
= nsig
.param_types
1101 vararg_rank
= nsig
.vararg_rank
1102 ret_type
= nsig
.ret_type
1105 # Look for some signature to inherit
1106 # FIXME: do not inherit from the intro, but from the most specific
1107 var msignature
: nullable MSignature = null
1108 if not mpropdef
.is_intro
then
1109 msignature
= mpropdef
.mproperty
.intro
.msignature
1110 if msignature
== null then return # Skip error
1111 else if mpropdef
.mproperty
.is_init
then
1112 # FIXME UGLY: inherit signature from a super-constructor
1113 for msupertype
in nclassdef
.mclassdef
.supertypes
do
1114 msupertype
= msupertype
.anchor_to
(mmodule
, nclassdef
.mclassdef
.bound_mtype
)
1115 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
1116 if candidate
!= null then
1117 if msignature
== null then
1118 msignature
= candidate
.intro
.as(MMethodDef).msignature
1124 # Inherit the signature
1125 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
1126 # Parameters are untyped, thus inherit them
1127 param_types
= msignature
.parameter_mtypes
1128 vararg_rank
= msignature
.vararg_rank
1130 if msignature
!= null and ret_type
== null then
1131 ret_type
= msignature
.return_mtype
1134 if param_names
.length
!= param_types
.length
then
1135 # Some parameters are typed, other parameters are not typed.
1136 modelbuilder
.warning
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
1140 msignature
= new MSignature(param_names
, param_types
, ret_type
, vararg_rank
)
1141 mpropdef
.msignature
= msignature
1144 redef fun check_signature
(modelbuilder
, nclassdef
)
1146 var mpropdef
= self.mpropdef
1147 if mpropdef
== null then return # Error thus skiped
1148 var mmodule
= mpropdef
.mclassdef
.mmodule
1149 var nsig
= self.n_signature
1150 var mysignature
= self.mpropdef
.msignature
1151 if mysignature
== null then return # Error thus skiped
1153 # Lookup for signature in the precursor
1154 # FIXME all precursors should be considered
1155 if not mpropdef
.is_intro
then
1156 var msignature
= mpropdef
.mproperty
.intro
.msignature
1157 if msignature
== null then return
1159 if mysignature
.arity
!= msignature
.arity
then
1161 if nsig
!= null then node
= nsig
else node
= self
1162 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1165 var precursor_ret_type
= msignature
.return_mtype
1166 var ret_type
= mysignature
.return_mtype
1167 if ret_type
!= null and precursor_ret_type
== null then
1168 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1172 if mysignature
.arity
> 0 then
1173 # Check parameters types
1174 for i
in [0..mysignature
.arity
[ do
1175 var myt
= mysignature
.parameter_mtypes
[i
]
1176 var prt
= msignature
.parameter_mtypes
[i
]
1177 if not myt
.is_subtype
(mmodule
, nclassdef
.mclassdef
.bound_mtype
, prt
) and
1178 not prt
.is_subtype
(mmodule
, nclassdef
.mclassdef
.bound_mtype
, myt
) then
1179 modelbuilder
.error
(nsig
.n_params
[i
], "Redef Error: Wrong type for parameter `{mysignature.parameter_names[i]}'. found {myt}, expected {prt}.")
1183 if precursor_ret_type
!= null then
1184 if ret_type
== null then
1185 # Inherit the return type
1186 ret_type
= precursor_ret_type
1187 else if not ret_type
.is_subtype
(mmodule
, nclassdef
.mclassdef
.bound_mtype
, precursor_ret_type
) then
1188 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1195 redef class AAttrPropdef
1196 # The associated MAttributeDef once build by a `ModelBuilder'
1197 var mpropdef
: nullable MAttributeDef
1198 # The associated getter (read accessor) if any
1199 var mreadpropdef
: nullable MMethodDef
1200 # The associated setter (write accessor) if any
1201 var mwritepropdef
: nullable MMethodDef
1202 redef fun build_property
(modelbuilder
, nclassdef
)
1204 var mclassdef
= nclassdef
.mclassdef
.as(not null)
1205 var mclass
= mclassdef
.mclass
1208 if self.n_id
!= null then
1209 name
= self.n_id
.text
1211 name
= self.n_id2
.text
1214 if mclass
.kind
== interface_kind
or mclassdef
.mclass
.kind
== enum_kind
then
1215 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
1216 else if mclass
.kind
== enum_kind
then
1217 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
1222 # Old attribute style
1223 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nid
, mclassdef
, name
)
1224 if mprop
== null then
1225 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
)
1226 mprop
= new MAttribute(mclassdef
, name
, mvisibility
)
1227 self.check_redef_keyword
(modelbuilder
, nclassdef
, self.n_kwredef
, false, mprop
)
1229 assert mprop
isa MAttribute
1230 check_redef_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
, mprop
)
1231 self.check_redef_keyword
(modelbuilder
, nclassdef
, self.n_kwredef
, true, mprop
)
1233 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
1234 self.mpropdef
= mpropdef
1235 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1237 var nreadable
= self.n_readable
1238 if nreadable
!= null then
1239 var readname
= name
.substring_from
(1)
1240 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid
, mclassdef
, readname
).as(nullable MMethod)
1241 if mreadprop
== null then
1242 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, nreadable
.n_visibility
)
1243 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
1244 self.check_redef_keyword
(modelbuilder
, nclassdef
, nreadable
.n_kwredef
, false, mreadprop
)
1246 self.check_redef_keyword
(modelbuilder
, nclassdef
, nreadable
.n_kwredef
, true, mreadprop
)
1247 check_redef_property_visibility
(modelbuilder
, nclassdef
, nreadable
.n_visibility
, mreadprop
)
1249 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
1250 self.mreadpropdef
= mreadpropdef
1251 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
1254 var nwritable
= self.n_writable
1255 if nwritable
!= null then
1256 var writename
= name
.substring_from
(1) + "="
1257 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid
, mclassdef
, writename
).as(nullable MMethod)
1258 if mwriteprop
== null then
1259 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, nwritable
.n_visibility
)
1260 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1261 self.check_redef_keyword
(modelbuilder
, nclassdef
, nwritable
.n_kwredef
, false, mwriteprop
)
1263 self.check_redef_keyword
(modelbuilder
, nclassdef
, nwritable
.n_kwredef
, true, mwriteprop
)
1264 check_redef_property_visibility
(modelbuilder
, nclassdef
, nwritable
.n_visibility
, mwriteprop
)
1266 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1267 self.mwritepropdef
= mwritepropdef
1268 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1271 # New attribute style
1272 var nid2
= self.n_id2
.as(not null)
1273 var mprop
= new MAttribute(mclassdef
, "@" + name
, none_visibility
)
1274 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
1275 self.mpropdef
= mpropdef
1276 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1279 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
1280 if mreadprop
== null then
1281 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
)
1282 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
1283 self.check_redef_keyword
(modelbuilder
, nclassdef
, n_kwredef
, false, mreadprop
)
1285 self.check_redef_keyword
(modelbuilder
, nclassdef
, n_kwredef
, true, mreadprop
)
1286 check_redef_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
, mreadprop
)
1288 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
1289 self.mreadpropdef
= mreadpropdef
1290 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
1292 var writename
= name
+ "="
1293 var nwritable
= self.n_writable
1294 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
1295 var nwkwredef
: nullable Token = null
1296 if nwritable
!= null then nwkwredef
= nwritable
.n_kwredef
1297 if mwriteprop
== null then
1299 if nwritable
!= null then
1300 mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, nwritable
.n_visibility
)
1302 mvisibility
= private_visibility
1304 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
1305 self.check_redef_keyword
(modelbuilder
, nclassdef
, nwkwredef
, false, mwriteprop
)
1307 self.check_redef_keyword
(modelbuilder
, nclassdef
, nwkwredef
, true, mwriteprop
)
1308 if nwritable
!= null then
1309 check_redef_property_visibility
(modelbuilder
, nclassdef
, nwritable
.n_visibility
, mwriteprop
)
1312 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
1313 self.mwritepropdef
= mwritepropdef
1314 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
1318 redef fun build_signature
(modelbuilder
, nclassdef
)
1320 var mpropdef
= self.mpropdef
1321 if mpropdef
== null then return # Error thus skiped
1322 var mmodule
= mpropdef
.mclassdef
.mmodule
1323 var mtype
: nullable MType = null
1325 var ntype
= self.n_type
1326 if ntype
!= null then
1327 mtype
= modelbuilder
.resolve_mtype
(nclassdef
, ntype
)
1328 if mtype
== null then return
1331 if mtype
== null then
1332 var nexpr
= self.n_expr
1333 if nexpr
!= null then
1334 if nexpr
isa ANewExpr then
1335 mtype
= modelbuilder
.resolve_mtype
(nclassdef
, nexpr
.n_type
)
1336 else if nexpr
isa AIntExpr then
1337 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1338 if cla
!= null then mtype
= cla
.mclass_type
1339 else if nexpr
isa AFloatExpr then
1340 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1341 if cla
!= null then mtype
= cla
.mclass_type
1342 else if nexpr
isa ACharExpr then
1343 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1344 if cla
!= null then mtype
= cla
.mclass_type
1345 else if nexpr
isa ABoolExpr then
1346 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1347 if cla
!= null then mtype
= cla
.mclass_type
1348 else if nexpr
isa ASuperstringExpr then
1349 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1350 if cla
!= null then mtype
= cla
.mclass_type
1351 else if nexpr
isa AStringFormExpr then
1352 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1353 if cla
!= null then mtype
= cla
.mclass_type
1355 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
1359 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}")
1363 if mtype
== null then return
1365 mpropdef
.static_mtype
= mtype
1367 var mreadpropdef
= self.mreadpropdef
1368 if mreadpropdef
!= null then
1369 var msignature
= new MSignature(new Array[String], new Array[MType], mtype
, -1)
1370 mreadpropdef
.msignature
= msignature
1373 var msritepropdef
= self.mwritepropdef
1374 if mwritepropdef
!= null then
1376 if n_id
!= null then
1377 name
= n_id
.text
.substring_from
(1)
1381 var msignature
= new MSignature([name
], [mtype
], null, -1)
1382 mwritepropdef
.msignature
= msignature
1386 redef fun check_signature
(modelbuilder
, nclassdef
)
1388 var mpropdef
= self.mpropdef
1389 if mpropdef
== null then return # Error thus skiped
1390 var mmodule
= mpropdef
.mclassdef
.mmodule
1391 var ntype
= self.n_type
1392 var mtype
= self.mpropdef
.static_mtype
1393 if mtype
== null then return # Error thus skiped
1395 # Lookup for signature in the precursor
1396 # FIXME all precursors should be considered
1397 if not mpropdef
.is_intro
then
1398 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1399 if precursor_type
== null then return
1401 if mtype
!= precursor_type
then
1402 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1407 # FIXME: Check getter ans setter
1411 redef class ATypePropdef
1412 # The associated MVirtualTypeDef once build by a `ModelBuilder'
1413 var mpropdef
: nullable MVirtualTypeDef
1414 redef fun build_property
(modelbuilder
, nclassdef
)
1416 var mclassdef
= nclassdef
.mclassdef
.as(not null)
1417 var name
= self.n_id
.text
1418 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1419 if mprop
== null then
1420 var mvisibility
= new_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
)
1421 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1422 self.check_redef_keyword
(modelbuilder
, nclassdef
, self.n_kwredef
, false, mprop
)
1424 self.check_redef_keyword
(modelbuilder
, nclassdef
, self.n_kwredef
, true, mprop
)
1425 assert mprop
isa MVirtualTypeProp
1426 check_redef_property_visibility
(modelbuilder
, nclassdef
, self.n_visibility
, mprop
)
1428 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1429 self.mpropdef
= mpropdef
1432 redef fun build_signature
(modelbuilder
, nclassdef
)
1434 var mpropdef
= self.mpropdef
1435 if mpropdef
== null then return # Error thus skiped
1436 var mmodule
= mpropdef
.mclassdef
.mmodule
1437 var mtype
: nullable MType = null
1439 var ntype
= self.n_type
1440 mtype
= modelbuilder
.resolve_mtype
(nclassdef
, ntype
)
1441 if mtype
== null then return
1443 mpropdef
.bound
= mtype
1444 # print "{mpropdef}: {mtype}"
1447 redef fun check_signature
(modelbuilder
, nclassdef
)
1449 var bound
= self.mpropdef
.bound
1451 # Fast case: the bound is not a formal type
1452 if not bound
isa MVirtualType then return
1454 var mmodule
= nclassdef
.mclassdef
.mmodule
1455 var anchor
= nclassdef
.mclassdef
.bound_mtype
1457 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1458 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1460 if seen
.has
(bound
) then
1462 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1466 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1467 if not next
isa MVirtualType then return