import poset
import opts
import toolcontext
+import phase
+
+private import more_collections
###
super
option_context.add_option(opt_path, opt_only_parse, opt_only_metamodel)
end
+
+ fun modelbuilder: ModelBuilder do return modelbuilder_real.as(not null)
+ private var modelbuilder_real: nullable ModelBuilder = null
+
end
# A model builder knows how to load nit source files and build the associated model
-# The important function is `parse_and_build' that does all the job.
-# The others function can be used for specific tasks
class ModelBuilder
# The model where new modules, classes and properties are added
var model: Model
# The toolcontext used to control the interaction with the user (getting options and displaying messages)
var toolcontext: ToolContext
+ # Run phases on all loaded modules
+ fun run_phases
+ do
+ var mmodules = model.mmodules.to_a
+ model.mmodule_importation_hierarchy.sort(mmodules)
+ var nmodules = new Array[AModule]
+ for mm in mmodules do
+ nmodules.add(mmodule2nmodule[mm])
+ end
+ toolcontext.run_phases(nmodules)
+
+ if toolcontext.opt_only_metamodel.value then
+ self.toolcontext.info("*** ONLY METAMODEL", 1)
+ exit(0)
+ end
+ end
+
# Instantiate a modelbuilder for a model and a toolcontext
# Important, the options of the toolcontext must be correctly set (parse_option already called)
init(model: Model, toolcontext: ToolContext)
do
self.model = model
self.toolcontext = toolcontext
+ assert toolcontext.modelbuilder_real == null
+ toolcontext.modelbuilder_real = self
# Setup the paths value
paths.append(toolcontext.opt_path.value)
if libname.file_exists then paths.add(libname.simplify_path)
end
- # Load and analyze a bunch of modules.
- # `modules' can contains filenames or module names.
- # Imported modules are automatically loaded, builds and analysed.
- # The result is the corresponding built modules.
+ # Load a bunch of modules.
+ # `modules` can contains filenames or module names.
+ # Imported modules are automatically loaded and modelized.
+ # The result is the corresponding model elements.
# Errors and warnings are printed with the toolcontext.
#
- # FIXME: Maybe just let the client do the loop (instead of playing with Sequences)
- fun parse_and_build(modules: Sequence[String]): Array[MModule]
+ # Note: class and property model element are not analysed.
+ fun parse(modules: Sequence[String]): Array[MModule]
do
var time0 = get_time
# Parse and recursively load
self.toolcontext.check_errors
- if self.toolcontext.opt_only_parse.value then
- self.toolcontext.info("--only-parse: stop processing", 2)
- return new Array[MModule]
+ if toolcontext.opt_only_parse.value then
+ self.toolcontext.info("*** ONLY PARSE...", 1)
+ exit(0)
end
- # Build the model
- self.toolcontext.info("*** BUILD MODEL ***", 1)
- self.build_all_classes
- var time2 = get_time
- self.toolcontext.info("*** END BUILD MODEL: {time2-time1} ***", 2)
-
- self.toolcontext.check_errors
-
return mmodules
end
- # Return a class named `name' visible by the module `mmodule'.
+ # Return a class named `name` visible by the module `mmodule`.
# Visibility in modules is correctly handled.
# If no such a class exists, then null is returned.
- # If more than one class exists, then an error on `anode' is displayed and null is returned.
+ # If more than one class exists, then an error on `anode` is displayed and null is returned.
# FIXME: add a way to handle class name conflict
fun try_get_mclass_by_name(anode: ANode, mmodule: MModule, name: String): nullable MClass
do
return res
end
- # Return a property named `name' on the type `mtype' visible in the module `mmodule'.
+ # Return a property named `name` on the type `mtype` visible in the module `mmodule`.
# Visibility in modules is correctly handled.
# Protected properties are returned (it is up to the caller to check and reject protected properties).
# If no such a property exists, then null is returned.
- # If more than one property exists, then an error on `anode' is displayed and null is returned.
+ # If more than one property exists, then an error on `anode` is displayed and null is returned.
# FIXME: add a way to handle property name conflict
fun try_get_mproperty_by_name2(anode: ANode, mmodule: MModule, mtype: MType, name: String): nullable MProperty
do
var paths: Array[String] = new Array[String]
# Get a module by its short name; if required, the module is loaded, parsed and its hierarchies computed.
- # If `mmodule' is set, then the module search starts from it up to the top level (see `paths');
- # if `mmodule' is null then the module is searched in the top level only.
- # If no module exists or there is a name conflict, then an error on `anode' is displayed and null is returned.
+ # If `mmodule` is set, then the module search starts from it up to the top level (see `paths`);
+ # if `mmodule` is null then the module is searched in the top level only.
+ # If no module exists or there is a name conflict, then an error on `anode` is displayed and null is returned.
# FIXME: add a way to handle module name conflict
fun get_mmodule_by_name(anode: ANode, mmodule: nullable MModule, name: String): nullable MModule
do
private fun build_module_importation(nmodule: AModule)
do
if nmodule.is_importation_done then return
+ nmodule.is_importation_done = true
var mmodule = nmodule.mmodule.as(not null)
var stdimport = true
var imported_modules = new Array[MModule]
var mod_name = aimport.n_name.n_id.text
var sup = self.get_mmodule_by_name(aimport.n_name, mmodule, mod_name)
if sup == null then continue # Skip error
+ aimport.mmodule = sup
imported_modules.add(sup)
var mvisibility = aimport.n_visibility.mvisibility
+ if mvisibility == protected_visibility then
+ error(aimport.n_visibility, "Error: only properties can be protected.")
+ return
+ end
mmodule.set_visibility_for(sup, mvisibility)
end
if stdimport then
end
self.toolcontext.info("{mmodule} imports {imported_modules.join(", ")}", 3)
mmodule.set_imported_mmodules(imported_modules)
- nmodule.is_importation_done = true
end
# All the loaded modules
var nmodules: Array[AModule] = new Array[AModule]
- # Build the classes of all modules `nmodules'.
- private fun build_all_classes
- do
- for nmodule in self.nmodules do
- build_classes(nmodule)
- end
- end
-
- # Visit the AST and create the MClass objects
- private fun build_a_mclass(nmodule: AModule, nclassdef: AClassdef)
- do
- var mmodule = nmodule.mmodule.as(not null)
-
- var name: String
- var nkind: nullable AClasskind
- var mkind: MClassKind
- var nvisibility: nullable AVisibility
- var mvisibility: nullable MVisibility
- var arity = 0
- if nclassdef isa AStdClassdef then
- name = nclassdef.n_id.text
- nkind = nclassdef.n_classkind
- mkind = nkind.mkind
- nvisibility = nclassdef.n_visibility
- mvisibility = nvisibility.mvisibility
- arity = nclassdef.n_formaldefs.length
- else if nclassdef isa ATopClassdef then
- name = "Object"
- nkind = null
- mkind = interface_kind
- nvisibility = null
- mvisibility = public_visibility
- else if nclassdef isa AMainClassdef then
- name = "Sys"
- nkind = null
- mkind = concrete_kind
- nvisibility = null
- mvisibility = public_visibility
- else
- abort
- end
-
- var mclass = try_get_mclass_by_name(nclassdef, mmodule, name)
- if mclass == null then
- mclass = new MClass(mmodule, name, arity, mkind, mvisibility)
- #print "new class {mclass}"
- else if nclassdef isa AStdClassdef and nclassdef.n_kwredef == null then
- error(nclassdef, "Redef error: {name} is an imported class. Add the redef keyword to refine it.")
- return
- else if mclass.arity != arity then
- error(nclassdef, "Redef error: Formal parameter arity missmatch; got {arity}, expected {mclass.arity}.")
- return
- else if nkind != null and mkind != concrete_kind and mclass.kind != mkind then
- error(nkind, "Error: refinement changed the kind from a {mclass.kind} to a {mkind}")
- else if nvisibility != null and mvisibility != public_visibility and mclass.visibility != mvisibility then
- error(nvisibility, "Error: refinement changed the visibility from a {mclass.visibility} to a {mvisibility}")
- end
- nclassdef.mclass = mclass
- end
-
- # Visit the AST and create the MClassDef objects
- private fun build_a_mclassdef(nmodule: AModule, nclassdef: AClassdef)
- do
- var mmodule = nmodule.mmodule.as(not null)
- var objectclass = try_get_mclass_by_name(nmodule, mmodule, "Object")
- var mclass = nclassdef.mclass
- if mclass == null then return # Skip error
- #var mclassdef = nclassdef.mclassdef.as(not null)
-
- var names = new Array[String]
- var bounds = new Array[MType]
- if nclassdef isa AStdClassdef and mclass.arity > 0 then
- # Collect formal parameter names
- for i in [0..mclass.arity[ do
- var nfd = nclassdef.n_formaldefs[i]
- var ptname = nfd.n_id.text
- if names.has(ptname) then
- error(nfd, "Error: A formal parameter type `{ptname}' already exists")
- return
- end
- names.add(ptname)
- end
-
- # Revolve bound for formal parameter names
- for i in [0..mclass.arity[ do
- var nfd = nclassdef.n_formaldefs[i]
- var nfdt = nfd.n_type
- if nfdt != null then
- var bound = resolve_mtype(nclassdef, nfdt)
- if bound == null then return # Forward error
- if bound.need_anchor then
- # No F-bounds!
- error(nfd, "Error: Formal parameter type `{names[i]}' bounded with a formal parameter type")
- else
- bounds.add(bound)
- end
- else if mclass.mclassdefs.is_empty then
- # No bound, then implicitely bound by nullable Object
- bounds.add(objectclass.mclass_type.as_nullable)
- else
- # Inherit the bound
- bounds.add(mclass.mclassdefs.first.bound_mtype.as(MGenericType).arguments[i])
- end
- end
- end
-
- var bound_mtype = mclass.get_mtype(bounds)
- var mclassdef = new MClassDef(mmodule, bound_mtype, nclassdef.location, names)
- nclassdef.mclassdef = mclassdef
- self.mclassdef2nclassdef[mclassdef] = nclassdef
-
- if mclassdef.is_intro then
- self.toolcontext.info("{mclassdef} introduces new {mclass.kind} {mclass.full_name}", 3)
- else
- self.toolcontext.info("{mclassdef} refine {mclass.kind} {mclass.full_name}", 3)
- end
- end
-
- # Visit the AST and set the super-types of the MClass objects (ie compute the inheritance)
- private fun build_a_mclassdef_inheritance(nmodule: AModule, nclassdef: AClassdef)
- do
- var mmodule = nmodule.mmodule.as(not null)
- var objectclass = try_get_mclass_by_name(nmodule, mmodule, "Object")
- var mclass = nclassdef.mclass.as(not null)
- var mclassdef = nclassdef.mclassdef.as(not null)
-
- var specobject = true
- var supertypes = new Array[MClassType]
- if nclassdef isa AStdClassdef then
- for nsc in nclassdef.n_superclasses do
- specobject = false
- var ntype = nsc.n_type
- var mtype = resolve_mtype(nclassdef, ntype)
- if mtype == null then continue # Skip because of error
- if not mtype isa MClassType then
- error(ntype, "Error: supertypes cannot be a formal type")
- return
- end
- supertypes.add mtype
- #print "new super : {mclass} < {mtype}"
- end
- end
- if specobject and mclass.name != "Object" and objectclass != null and mclassdef.is_intro then
- supertypes.add objectclass.mclass_type
- end
-
- mclassdef.set_supertypes(supertypes)
- if not supertypes.is_empty then self.toolcontext.info("{mclassdef} new super-types: {supertypes.join(", ")}", 3)
- end
-
- # Check the validity of the specialization heirarchy
- # FIXME Stub implementation
- private fun check_supertypes(nmodule: AModule, nclassdef: AClassdef)
- do
- var mmodule = nmodule.mmodule.as(not null)
- var objectclass = try_get_mclass_by_name(nmodule, mmodule, "Object")
- var mclass = nclassdef.mclass.as(not null)
- var mclassdef = nclassdef.mclassdef.as(not null)
- end
-
- # Build the classes of the module `nmodule'.
- # REQUIRE: classes of imported modules are already build. (let `build_all_classes' do the job)
- private fun build_classes(nmodule: AModule)
- do
- # Force building recursively
- if nmodule.build_classes_is_done then return
- var mmodule = nmodule.mmodule.as(not null)
- for imp in mmodule.in_importation.direct_greaters do
- build_classes(mmodule2nmodule[imp])
- end
-
- # Create all classes
- for nclassdef in nmodule.n_classdefs do
- self.build_a_mclass(nmodule, nclassdef)
- end
-
- # Create all classdefs
- for nclassdef in nmodule.n_classdefs do
- self.build_a_mclassdef(nmodule, nclassdef)
- end
-
- for nclassdef in nmodule.n_classdefs do
- if nclassdef.mclassdef == null then return # forward error
- end
-
- # Create inheritance on all classdefs
- for nclassdef in nmodule.n_classdefs do
- self.build_a_mclassdef_inheritance(nmodule, nclassdef)
- end
-
- # TODO: Check that the super-class is not intrusive
-
- # TODO: Check that the super-class is not already known (by transitivity)
-
- for nclassdef in nmodule.n_classdefs do
- self.build_properties(nclassdef)
- end
-
- nmodule.build_classes_is_done = true
- end
-
# Register the nmodule associated to each mmodule
- # FIXME: why not refine the MModule class with a nullable attribute?
+ # FIXME: why not refine the `MModule` class with a nullable attribute?
var mmodule2nmodule: HashMap[MModule, AModule] = new HashMap[MModule, AModule]
- # Register the nclassdef associated to each mclassdef
- # FIXME: why not refine the MClassDef class with a nullable attribute?
- var mclassdef2nclassdef: HashMap[MClassDef, AClassdef] = new HashMap[MClassDef, AClassdef]
- # Register the npropdef associated to each mpropdef
- # FIXME: why not refine the MPropDef class with a nullable attribute?
- var mpropdef2npropdef: HashMap[MPropDef, APropdef] = new HashMap[MPropDef, APropdef]
-
- # Build the properties of `nclassdef'.
- # REQUIRE: all superclasses are built.
- private fun build_properties(nclassdef: AClassdef)
- do
- # Force building recursively
- if nclassdef.build_properties_is_done then return
- var mclassdef = nclassdef.mclassdef.as(not null)
- if mclassdef.in_hierarchy == null then return # Skip error
- for superclassdef in mclassdef.in_hierarchy.direct_greaters do
- build_properties(mclassdef2nclassdef[superclassdef])
- end
-
- for npropdef in nclassdef.n_propdefs do
- npropdef.build_property(self, nclassdef)
- end
- for npropdef in nclassdef.n_propdefs do
- npropdef.build_signature(self, nclassdef)
- end
- for npropdef in nclassdef.n_propdefs do
- npropdef.check_signature(self, nclassdef)
- end
- process_default_constructors(nclassdef)
- nclassdef.build_properties_is_done = true
- end
-
- # Introduce or inherit default constructor
- # This is the last part of `build_properties'.
- private fun process_default_constructors(nclassdef: AClassdef)
- do
- var mclassdef = nclassdef.mclassdef.as(not null)
-
- # Are we a refinement
- if not mclassdef.is_intro then return
-
- # Is the class forbid constructors?
- if not mclassdef.mclass.kind.need_init then return
-
- # Is there already a constructor defined?
- for mpropdef in mclassdef.mpropdefs do
- if not mpropdef isa MMethodDef then continue
- if mpropdef.mproperty.is_init then return
- end
-
- if not nclassdef isa AStdClassdef then return
-
- var mmodule = nclassdef.mclassdef.mmodule
- # Do we inherit for a constructor?
- var combine = new Array[MMethod]
- var inhc: nullable MClass = null
- for st in mclassdef.supertypes do
- var c = st.mclass
- if not c.kind.need_init then continue
- st = st.anchor_to(mmodule, nclassdef.mclassdef.bound_mtype)
- var candidate = self.try_get_mproperty_by_name2(nclassdef, mmodule, st, "init").as(nullable MMethod)
- if candidate != null and candidate.intro.msignature.arity == 0 then
- combine.add(candidate)
- continue
- end
- var inhc2 = c.inherit_init_from
- if inhc2 == null then inhc2 = c
- if inhc2 == inhc then continue
- if inhc != null then
- self.error(nclassdef, "Error: Cannot provide a defaut constructor: conflict for {inhc} and {c}")
- else
- inhc = inhc2
- end
- end
- if combine.is_empty and inhc != null then
- # TODO: actively inherit the consturctor
- self.toolcontext.info("{mclassdef} inherits all constructors from {inhc}", 3)
- mclassdef.mclass.inherit_init_from = inhc
- return
- end
- if not combine.is_empty and inhc != null then
- self.error(nclassdef, "Error: Cannot provide a defaut constructor: conflict for {combine.join(", ")} and {inhc}")
- return
- end
-
- if not combine.is_empty then
- nclassdef.super_inits = combine
- var mprop = new MMethod(mclassdef, "init", mclassdef.mclass.visibility)
- var mpropdef = new MMethodDef(mclassdef, mprop, nclassdef.location)
- var mparameters = new Array[MParameter]
- var msignature = new MSignature(mparameters, null)
- mpropdef.msignature = msignature
- mprop.is_init = true
- nclassdef.mfree_init = mpropdef
- self.toolcontext.info("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
- return
- end
-
- # Collect undefined attributes
- var mparameters = new Array[MParameter]
- for npropdef in nclassdef.n_propdefs do
- if npropdef isa AAttrPropdef and npropdef.n_expr == null then
- var paramname = npropdef.mpropdef.mproperty.name.substring_from(1)
- var ret_type = npropdef.mpropdef.static_mtype
- if ret_type == null then return
- var mparameter = new MParameter(paramname, ret_type, false)
- mparameters.add(mparameter)
- end
- end
-
- var mprop = new MMethod(mclassdef, "init", mclassdef.mclass.visibility)
- var mpropdef = new MMethodDef(mclassdef, mprop, nclassdef.location)
- var msignature = new MSignature(mparameters, null)
- mpropdef.msignature = msignature
- mprop.is_init = true
- nclassdef.mfree_init = mpropdef
- self.toolcontext.info("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
- end
-
- # Return the static type associated to the node `ntype'.
- # `classdef' is the context where the call is made (used to understand formal types)
- # The mmodule used as context is `nclassdef.mmodule'
- # In case of problem, an error is displayed on `ntype' and null is returned.
- # FIXME: the name "resolve_mtype" is awful
- fun resolve_mtype(nclassdef: AClassdef, ntype: AType): nullable MType
- do
- var name = ntype.n_id.text
- var mclassdef = nclassdef.mclassdef
- var mmodule = nclassdef.parent.as(AModule).mmodule.as(not null)
- var res: MType
-
- # Check virtual type
- if mclassdef != null then
- var prop = try_get_mproperty_by_name(ntype, mclassdef, name).as(nullable MVirtualTypeProp)
- if prop != null then
- if not ntype.n_types.is_empty then
- error(ntype, "Type error: formal type {name} cannot have formal parameters.")
- end
- res = prop.mvirtualtype
- if ntype.n_kwnullable != null then res = res.as_nullable
- return res
- end
- end
-
- # Check parameter type
- if mclassdef != null and mclassdef.parameter_names.has(name) then
- if not ntype.n_types.is_empty then
- error(ntype, "Type error: formal type {name} cannot have formal parameters.")
- end
- for i in [0..mclassdef.parameter_names.length[ do
- if mclassdef.parameter_names[i] == name then
- res = mclassdef.mclass.mclass_type.as(MGenericType).arguments[i]
- if ntype.n_kwnullable != null then res = res.as_nullable
- return res
- end
- end
- abort
- end
-
- # Check class
- var mclass = try_get_mclass_by_name(ntype, mmodule, name)
- if mclass != null then
- var arity = ntype.n_types.length
- if arity != mclass.arity then
- if arity == 0 then
- error(ntype, "Type error: '{name}' is a generic class.")
- else if mclass.arity == 0 then
- error(ntype, "Type error: '{name}' is not a generic class.")
- else
- error(ntype, "Type error: '{name}' has {mclass.arity} parameters ({arity} are provided).")
- end
- return null
- end
- if arity == 0 then
- res = mclass.mclass_type
- if ntype.n_kwnullable != null then res = res.as_nullable
- return res
- else
- var mtypes = new Array[MType]
- for nt in ntype.n_types do
- var mt = resolve_mtype(nclassdef, nt)
- if mt == null then return null # Forward error
- mtypes.add(mt)
- end
- res = mclass.get_mtype(mtypes)
- if ntype.n_kwnullable != null then res = res.as_nullable
- return res
- end
- end
-
- # If everything fail, then give up :(
- error(ntype, "Type error: class {name} not found in module {mmodule}.")
- return null
- end
# Helper function to display an error on a node.
- # Alias for `self.toolcontext.error(n.hot_location, text)'
+ # Alias for `self.toolcontext.error(n.hot_location, text)`
fun error(n: ANode, text: String)
do
self.toolcontext.error(n.hot_location, text)
end
# Helper function to display a warning on a node.
- # Alias for: `self.toolcontext.warning(n.hot_location, text)'
+ # Alias for: `self.toolcontext.warning(n.hot_location, text)`
fun warning(n: ANode, text: String)
do
self.toolcontext.warning(n.hot_location, text)
end
+
+ # Force to get the primitive method named `name` on the type `recv` or do a fatal error on `n`
+ fun force_get_primitive_method(n: ANode, name: String, recv: MClass, mmodule: MModule): MMethod
+ do
+ var res = mmodule.try_get_primitive_method(name, recv)
+ if res == null then
+ self.toolcontext.fatal_error(n.hot_location, "Fatal Error: {recv} must have a property named {name}.")
+ abort
+ end
+ return res
+ end
+end
+
+redef class AStdImport
+ # The imported module once determined
+ var mmodule: nullable MModule = null
end
redef class AModule
- # The associated MModule once build by a `ModelBuilder'
+ # The associated MModule once build by a `ModelBuilder`
var mmodule: nullable MModule
# Flag that indicate if the importation is already completed
var is_importation_done: Bool = false
- # Flag that indicate if the class and prop building is already completed
- var build_classes_is_done: Bool = false
-end
-
-redef class MClass
- # The class whose self inherit all the constructors.
- # 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
- var inherit_init_from: nullable MClass = null
-end
-
-redef class AClassdef
- # The associated MClass once build by a `ModelBuilder'
- var mclass: nullable MClass
- # The associated MClassDef once build by a `ModelBuilder'
- var mclassdef: nullable MClassDef
- var build_properties_is_done: Bool = false
- # The list of super-constructor to call at the start of the free constructor
- # 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
- var super_inits: nullable Collection[MMethod] = null
-
- # The free init (implicitely constructed by the class if required)
- var mfree_init: nullable MMethodDef = null
-end
-
-redef class AClasskind
- # The class kind associated with the AST node class
- private fun mkind: MClassKind is abstract
-end
-redef class AConcreteClasskind
- redef fun mkind do return concrete_kind
-end
-redef class AAbstractClasskind
- redef fun mkind do return abstract_kind
-end
-redef class AInterfaceClasskind
- redef fun mkind do return interface_kind
-end
-redef class AEnumClasskind
- redef fun mkind do return enum_kind
-end
-redef class AExternClasskind
- redef fun mkind do return extern_kind
end
redef class AVisibility
# The visibility level associated with the AST node class
- private fun mvisibility: MVisibility is abstract
+ fun mvisibility: MVisibility is abstract
end
redef class AIntrudeVisibility
redef fun mvisibility do return intrude_visibility
redef class APrivateVisibility
redef fun mvisibility do return private_visibility
end
-
-
-#
-
-redef class Prod
- # Join the text of all tokens
- # Used to get the 'real name' of method definitions.
- fun collect_text: String
- do
- var v = new TextCollectorVisitor
- v.enter_visit(self)
- assert v.text != ""
- return v.text
- end
-end
-
-private class TextCollectorVisitor
- super Visitor
- var text: String = ""
- redef fun visit(n)
- do
- if n isa Token then text += n.text
- n.visit_all(self)
- end
-end
-
-redef class APropdef
- private fun build_property(modelbuilder: ModelBuilder, nclassdef: AClassdef)
- do
- end
- private fun build_signature(modelbuilder: ModelBuilder, nclassdef: AClassdef)
- do
- end
- private fun check_signature(modelbuilder: ModelBuilder, nclassdef: AClassdef)
- do
- end
- private fun new_property_visibility(modelbuilder: ModelBuilder, nclassdef: AClassdef, nvisibility: nullable AVisibility): MVisibility
- do
- var mvisibility = public_visibility
- if nvisibility != null then mvisibility = nvisibility.mvisibility
- if nclassdef.mclassdef.mclass.visibility == private_visibility then
- if mvisibility == protected_visibility then
- assert nvisibility != null
- modelbuilder.error(nvisibility, "Error: The only legal visibility for properties in a private class is private.")
- else if mvisibility == private_visibility then
- assert nvisibility != null
- # Not yet
- # modelbuilder.warning(nvisibility, "Warning: private is unrequired since the only legal visibility for properties in a private class is private.")
- end
- mvisibility = private_visibility
- end
- return mvisibility
- end
-
- private fun check_redef_property_visibility(modelbuilder: ModelBuilder, nclassdef: AClassdef, nvisibility: nullable AVisibility, mprop: MProperty)
- do
- if nvisibility == null then return
- var mvisibility = nvisibility.mvisibility
- if mvisibility != mprop.visibility and mvisibility != public_visibility then
- modelbuilder.error(nvisibility, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
- end
- end
-
- private fun check_redef_keyword(modelbuilder: ModelBuilder, nclassdef: AClassdef, kwredef: nullable Token, need_redef: Bool, mprop: MProperty)
- do
- if kwredef == null then
- if need_redef then
- modelbuilder.error(self, "Redef error: {nclassdef.mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
- end
- else
- if not need_redef then
- modelbuilder.error(self, "Error: No property {nclassdef.mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
- end
- end
- end
-
-end
-
-redef class ASignature
- # Is the model builder has correctly visited the signature
- var is_visited = false
- # Names of parameters from the AST
- # REQUIRE: is_visited
- var param_names = new Array[String]
- # Types of parameters from the AST
- # REQUIRE: is_visited
- var param_types = new Array[MType]
- # Rank of the vararg (of -1 if none)
- # REQUIRE: is_visited
- var vararg_rank: Int = -1
- # Return type
- var ret_type: nullable MType = null
-
- # Visit and fill information about a signature
- private fun visit_signature(modelbuilder: ModelBuilder, nclassdef: AClassdef): Bool
- do
- var param_names = self.param_names
- var param_types = self.param_types
- for np in self.n_params do
- param_names.add(np.n_id.text)
- var ntype = np.n_type
- if ntype != null then
- var mtype = modelbuilder.resolve_mtype(nclassdef, ntype)
- if mtype == null then return false # Skip error
- for i in [0..param_names.length-param_types.length[ do
- param_types.add(mtype)
- end
- if np.n_dotdotdot != null then
- if self.vararg_rank != -1 then
- modelbuilder.error(np, "Error: {param_names[self.vararg_rank]} is already a vararg")
- return false
- else
- self.vararg_rank = param_names.length - 1
- end
- end
- end
- end
- var ntype = self.n_type
- if ntype != null then
- self.ret_type = modelbuilder.resolve_mtype(nclassdef, ntype)
- if self.ret_type == null then return false # Skip errir
- end
-
- for nclosure in self.n_closure_decls do
- if not nclosure.n_signature.visit_signature(modelbuilder, nclassdef) then return false
- end
-
- self.is_visited = true
- return true
- end
-
- # Build a visited signature
- fun build_signature(modelbuilder: ModelBuilder, nclassdef: AClassdef): nullable MSignature
- do
- if param_names.length != param_types.length then
- # Some parameters are typed, other parameters are not typed.
- modelbuilder.error(self.n_params[param_types.length], "Error: Untyped parameter `{param_names[param_types.length]}'.")
- return null
- end
-
- var mparameters = new Array[MParameter]
- for i in [0..param_names.length[ do
- var mparameter = new MParameter(param_names[i], param_types[i], i == vararg_rank)
- mparameters.add(mparameter)
- end
-
- var msignature = new MSignature(mparameters, ret_type)
- return msignature
- end
-end
-
-redef class AMethPropdef
- # The associated MMethodDef once build by a `ModelBuilder'
- var mpropdef: nullable MMethodDef
-
- # The associated super init if any
- var super_init: nullable MMethod
- redef fun build_property(modelbuilder, nclassdef)
- do
- var is_init = self isa AInitPropdef
- var mclassdef = nclassdef.mclassdef.as(not null)
- var name: String
- var amethodid = self.n_methid
- var name_node: ANode
- if amethodid == null then
- if self isa AMainMethPropdef then
- name = "main"
- name_node = self
- else if self isa AConcreteInitPropdef then
- name = "init"
- name_node = self.n_kwinit
- else if self isa AExternInitPropdef then
- name = "new"
- name_node = self.n_kwnew
- else
- abort
- end
- else if amethodid isa AIdMethid then
- name = amethodid.n_id.text
- name_node = amethodid
- else
- # operator, bracket or assign
- name = amethodid.collect_text
- name_node = amethodid
-
- if name == "-" and self.n_signature.n_params.length == 0 then
- name = "unary -"
- end
- end
-
- var mprop: nullable MMethod = null
- if not is_init or n_kwredef != null then mprop = modelbuilder.try_get_mproperty_by_name(name_node, mclassdef, name).as(nullable MMethod)
- if mprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, self.n_visibility)
- mprop = new MMethod(mclassdef, name, mvisibility)
- mprop.is_init = is_init
- mprop.is_new = self isa AExternInitPropdef
- self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mprop)
- else
- if n_kwredef == null then
- if self isa AMainMethPropdef then
- # no warning
- else
- self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mprop)
- end
- end
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- end
-
- var mpropdef = new MMethodDef(mclassdef, mprop, self.location)
-
- self.mpropdef = mpropdef
- modelbuilder.mpropdef2npropdef[mpropdef] = self
- if mpropdef.is_intro then
- modelbuilder.toolcontext.info("{mpropdef} introduces new method {mprop.full_name}", 3)
- else
- modelbuilder.toolcontext.info("{mpropdef} redefines method {mprop.full_name}", 3)
- end
- end
-
- redef fun build_signature(modelbuilder, nclassdef)
- do
- var mpropdef = self.mpropdef
- if mpropdef == null then return # Error thus skiped
- var mmodule = mpropdef.mclassdef.mmodule
- var nsig = self.n_signature
-
- # Retrieve info from the signature AST
- var param_names = new Array[String] # Names of parameters from the AST
- var param_types = new Array[MType] # Types of parameters from the AST
- var vararg_rank = -1
- var ret_type: nullable MType = null # Return type from the AST
- if nsig != null then
- if not nsig.visit_signature(modelbuilder, nclassdef) then return
- param_names = nsig.param_names
- param_types = nsig.param_types
- vararg_rank = nsig.vararg_rank
- ret_type = nsig.ret_type
- end
-
- # Look for some signature to inherit
- # FIXME: do not inherit from the intro, but from the most specific
- var msignature: nullable MSignature = null
- if not mpropdef.is_intro then
- msignature = mpropdef.mproperty.intro.msignature
- if msignature == null then return # Skip error
-
- # Check inherited signature arity
- if param_names.length != msignature.arity then
- var node: ANode
- if nsig != null then node = nsig else node = self
- modelbuilder.error(node, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
- return
- end
- else if mpropdef.mproperty.is_init then
- # FIXME UGLY: inherit signature from a super-constructor
- for msupertype in nclassdef.mclassdef.supertypes do
- msupertype = msupertype.anchor_to(mmodule, nclassdef.mclassdef.bound_mtype)
- var candidate = modelbuilder.try_get_mproperty_by_name2(self, mmodule, msupertype, mpropdef.mproperty.name)
- if candidate != null then
- if msignature == null then
- msignature = candidate.intro.as(MMethodDef).msignature
- end
- end
- end
- end
-
-
- # Inherit the signature
- if msignature != null and param_names.length != param_types.length and param_names.length == msignature.arity and param_types.length == 0 then
- # Parameters are untyped, thus inherit them
- param_types = new Array[MType]
- for mparameter in msignature.mparameters do
- param_types.add(mparameter.mtype)
- end
- vararg_rank = msignature.vararg_rank
- end
- if msignature != null and ret_type == null then
- ret_type = msignature.return_mtype
- end
-
- if param_names.length != param_types.length then
- # Some parameters are typed, other parameters are not typed.
- modelbuilder.error(nsig.n_params[param_types.length], "Error: Untyped parameter `{param_names[param_types.length]}'.")
- return
- end
-
- var mparameters = new Array[MParameter]
- for i in [0..param_names.length[ do
- var mparameter = new MParameter(param_names[i], param_types[i], i == vararg_rank)
- mparameters.add(mparameter)
- end
-
- msignature = new MSignature(mparameters, ret_type)
- mpropdef.msignature = msignature
-
- if nsig != null then
- for nclosure in nsig.n_closure_decls do
- var clos_signature = nclosure.n_signature.build_signature(modelbuilder, nclassdef)
- if clos_signature == null then return
- var mparameter = new MParameter(nclosure.n_id.text, clos_signature, false)
- msignature.mclosures.add(mparameter)
- end
- end
-
- end
-
- redef fun check_signature(modelbuilder, nclassdef)
- do
- var mpropdef = self.mpropdef
- if mpropdef == null then return # Error thus skiped
- var mmodule = mpropdef.mclassdef.mmodule
- var nsig = self.n_signature
- var mysignature = self.mpropdef.msignature
- if mysignature == null then return # Error thus skiped
-
- # Lookup for signature in the precursor
- # FIXME all precursors should be considered
- if not mpropdef.is_intro then
- var msignature = mpropdef.mproperty.intro.msignature
- if msignature == null then return
-
- var precursor_ret_type = msignature.return_mtype
- var ret_type = mysignature.return_mtype
- if ret_type != null and precursor_ret_type == null then
- modelbuilder.error(nsig.n_type.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
- return
- end
-
- if mysignature.arity > 0 then
- # Check parameters types
- for i in [0..mysignature.arity[ do
- var myt = mysignature.mparameters[i].mtype
- var prt = msignature.mparameters[i].mtype
- if not myt.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, prt) and
- not prt.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, myt) then
- modelbuilder.error(nsig.n_params[i], "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
- end
- end
- end
- if precursor_ret_type != null then
- if ret_type == null then
- # Inherit the return type
- ret_type = precursor_ret_type
- else if not ret_type.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, precursor_ret_type) then
- modelbuilder.error(nsig.n_type.as(not null), "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
- end
- end
- end
- end
-end
-
-redef class AAttrPropdef
- # The associated MAttributeDef once build by a `ModelBuilder'
- var mpropdef: nullable MAttributeDef
- # The associated getter (read accessor) if any
- var mreadpropdef: nullable MMethodDef
- # The associated setter (write accessor) if any
- var mwritepropdef: nullable MMethodDef
- redef fun build_property(modelbuilder, nclassdef)
- do
- var mclassdef = nclassdef.mclassdef.as(not null)
- var mclass = mclassdef.mclass
-
- var name: String
- if self.n_id != null then
- name = self.n_id.text
- else
- name = self.n_id2.text
- end
-
- if mclass.kind == interface_kind or mclassdef.mclass.kind == enum_kind then
- modelbuilder.error(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
- else if mclass.kind == enum_kind then
- modelbuilder.error(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
- end
-
- var nid = self.n_id
- if nid != null then
- # Old attribute style
- var mprop = modelbuilder.try_get_mproperty_by_name(nid, mclassdef, name)
- if mprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, self.n_visibility)
- mprop = new MAttribute(mclassdef, name, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop)
- else
- assert mprop isa MAttribute
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop)
- end
- var mpropdef = new MAttributeDef(mclassdef, mprop, self.location)
- self.mpropdef = mpropdef
- modelbuilder.mpropdef2npropdef[mpropdef] = self
-
- var nreadable = self.n_readable
- if nreadable != null then
- var readname = name.substring_from(1)
- var mreadprop = modelbuilder.try_get_mproperty_by_name(nid, mclassdef, readname).as(nullable MMethod)
- if mreadprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, nreadable.n_visibility)
- mreadprop = new MMethod(mclassdef, readname, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, false, mreadprop)
- else
- self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, true, mreadprop)
- check_redef_property_visibility(modelbuilder, nclassdef, nreadable.n_visibility, mreadprop)
- end
- var mreadpropdef = new MMethodDef(mclassdef, mreadprop, self.location)
- self.mreadpropdef = mreadpropdef
- modelbuilder.mpropdef2npropdef[mreadpropdef] = self
- end
-
- var nwritable = self.n_writable
- if nwritable != null then
- var writename = name.substring_from(1) + "="
- var mwriteprop = modelbuilder.try_get_mproperty_by_name(nid, mclassdef, writename).as(nullable MMethod)
- if mwriteprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility)
- mwriteprop = new MMethod(mclassdef, writename, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, false, mwriteprop)
- else
- self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, true, mwriteprop)
- check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
- end
- var mwritepropdef = new MMethodDef(mclassdef, mwriteprop, self.location)
- self.mwritepropdef = mwritepropdef
- modelbuilder.mpropdef2npropdef[mwritepropdef] = self
- end
- else
- # New attribute style
- var nid2 = self.n_id2.as(not null)
- var mprop = new MAttribute(mclassdef, "@" + name, none_visibility)
- var mpropdef = new MAttributeDef(mclassdef, mprop, self.location)
- self.mpropdef = mpropdef
- modelbuilder.mpropdef2npropdef[mpropdef] = self
-
- var readname = name
- var mreadprop = modelbuilder.try_get_mproperty_by_name(nid2, mclassdef, readname).as(nullable MMethod)
- if mreadprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, self.n_visibility)
- mreadprop = new MMethod(mclassdef, readname, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mreadprop)
- else
- self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mreadprop)
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mreadprop)
- end
- var mreadpropdef = new MMethodDef(mclassdef, mreadprop, self.location)
- self.mreadpropdef = mreadpropdef
- modelbuilder.mpropdef2npropdef[mreadpropdef] = self
-
- var writename = name + "="
- var nwritable = self.n_writable
- var mwriteprop = modelbuilder.try_get_mproperty_by_name(nid2, mclassdef, writename).as(nullable MMethod)
- var nwkwredef: nullable Token = null
- if nwritable != null then nwkwredef = nwritable.n_kwredef
- if mwriteprop == null then
- var mvisibility
- if nwritable != null then
- mvisibility = new_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility)
- else
- mvisibility = private_visibility
- end
- mwriteprop = new MMethod(mclassdef, writename, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, false, mwriteprop)
- else
- self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, true, mwriteprop)
- if nwritable != null then
- check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
- end
- end
- var mwritepropdef = new MMethodDef(mclassdef, mwriteprop, self.location)
- self.mwritepropdef = mwritepropdef
- modelbuilder.mpropdef2npropdef[mwritepropdef] = self
- end
- end
-
- redef fun build_signature(modelbuilder, nclassdef)
- do
- var mpropdef = self.mpropdef
- if mpropdef == null then return # Error thus skiped
- var mmodule = mpropdef.mclassdef.mmodule
- var mtype: nullable MType = null
-
- var ntype = self.n_type
- if ntype != null then
- mtype = modelbuilder.resolve_mtype(nclassdef, ntype)
- if mtype == null then return
- end
-
- if mtype == null then
- var nexpr = self.n_expr
- if nexpr != null then
- if nexpr isa ANewExpr then
- mtype = modelbuilder.resolve_mtype(nclassdef, nexpr.n_type)
- else if nexpr isa AIntExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Int")
- if cla != null then mtype = cla.mclass_type
- else if nexpr isa AFloatExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Float")
- if cla != null then mtype = cla.mclass_type
- else if nexpr isa ACharExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Char")
- if cla != null then mtype = cla.mclass_type
- else if nexpr isa ABoolExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Bool")
- if cla != null then mtype = cla.mclass_type
- else if nexpr isa ASuperstringExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "String")
- if cla != null then mtype = cla.mclass_type
- else if nexpr isa AStringFormExpr then
- var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "String")
- if cla != null then mtype = cla.mclass_type
- else
- modelbuilder.error(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
- end
-
- else
- modelbuilder.error(self, "Error: Untyped attribute {mpropdef}")
- end
- end
-
- if mtype == null then return
-
- mpropdef.static_mtype = mtype
-
- var mreadpropdef = self.mreadpropdef
- if mreadpropdef != null then
- var msignature = new MSignature(new Array[MParameter], mtype)
- mreadpropdef.msignature = msignature
- end
-
- var msritepropdef = self.mwritepropdef
- if mwritepropdef != null then
- var name: String
- if n_id != null then
- name = n_id.text.substring_from(1)
- else
- name = n_id2.text
- end
- var mparameter = new MParameter(name, mtype, false)
- var msignature = new MSignature([mparameter], null)
- mwritepropdef.msignature = msignature
- end
- end
-
- redef fun check_signature(modelbuilder, nclassdef)
- do
- var mpropdef = self.mpropdef
- if mpropdef == null then return # Error thus skiped
- var mmodule = mpropdef.mclassdef.mmodule
- var ntype = self.n_type
- var mtype = self.mpropdef.static_mtype
- if mtype == null then return # Error thus skiped
-
- # Lookup for signature in the precursor
- # FIXME all precursors should be considered
- if not mpropdef.is_intro then
- var precursor_type = mpropdef.mproperty.intro.static_mtype
- if precursor_type == null then return
-
- if mtype != precursor_type then
- modelbuilder.error(ntype.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
- return
- end
- end
-
- # Check getter and setter
- var meth = self.mreadpropdef
- if meth != null then self.check_method_signature(modelbuilder, nclassdef, meth)
- meth = self.mwritepropdef
- if meth != null then self.check_method_signature(modelbuilder, nclassdef, meth)
- end
-
- private fun check_method_signature(modelbuilder: ModelBuilder, nclassdef: AClassdef, mpropdef: MMethodDef)
- do
- var mmodule = mpropdef.mclassdef.mmodule
- var nsig = self.n_type
- var mysignature = mpropdef.msignature
- if mysignature == null then return # Error thus skiped
-
- # Lookup for signature in the precursor
- # FIXME all precursors should be considered
- if not mpropdef.is_intro then
- var msignature = mpropdef.mproperty.intro.msignature
- if msignature == null then return
-
- if mysignature.arity != msignature.arity then
- var node: ANode
- if nsig != null then node = nsig else node = self
- modelbuilder.error(node, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
- return
- end
- var precursor_ret_type = msignature.return_mtype
- var ret_type = mysignature.return_mtype
- if ret_type != null and precursor_ret_type == null then
- var node: ANode
- if nsig != null then node = nsig else node = self
- modelbuilder.error(node, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
- return
- end
-
- if mysignature.arity > 0 then
- # Check parameters types
- for i in [0..mysignature.arity[ do
- var myt = mysignature.mparameters[i].mtype
- var prt = msignature.mparameters[i].mtype
- if not myt.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, prt) and
- not prt.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, myt) then
- var node: ANode
- if nsig != null then node = nsig else node = self
- modelbuilder.error(node, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
- end
- end
- end
- if precursor_ret_type != null then
- if ret_type == null then
- # Inherit the return type
- ret_type = precursor_ret_type
- else if not ret_type.is_subtype(mmodule, nclassdef.mclassdef.bound_mtype, precursor_ret_type) then
- var node: ANode
- if nsig != null then node = nsig else node = self
- modelbuilder.error(node, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
- end
- end
- end
- end
-end
-
-redef class ATypePropdef
- # The associated MVirtualTypeDef once build by a `ModelBuilder'
- var mpropdef: nullable MVirtualTypeDef
- redef fun build_property(modelbuilder, nclassdef)
- do
- var mclassdef = nclassdef.mclassdef.as(not null)
- var name = self.n_id.text
- var mprop = modelbuilder.try_get_mproperty_by_name(self.n_id, mclassdef, name)
- if mprop == null then
- var mvisibility = new_property_visibility(modelbuilder, nclassdef, self.n_visibility)
- mprop = new MVirtualTypeProp(mclassdef, name, mvisibility)
- self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop)
- else
- self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop)
- assert mprop isa MVirtualTypeProp
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- end
- var mpropdef = new MVirtualTypeDef(mclassdef, mprop, self.location)
- self.mpropdef = mpropdef
- end
-
- redef fun build_signature(modelbuilder, nclassdef)
- do
- var mpropdef = self.mpropdef
- if mpropdef == null then return # Error thus skiped
- var mmodule = mpropdef.mclassdef.mmodule
- var mtype: nullable MType = null
-
- var ntype = self.n_type
- mtype = modelbuilder.resolve_mtype(nclassdef, ntype)
- if mtype == null then return
-
- mpropdef.bound = mtype
- # print "{mpropdef}: {mtype}"
- end
-
- redef fun check_signature(modelbuilder, nclassdef)
- do
- var bound = self.mpropdef.bound
-
- # Fast case: the bound is not a formal type
- if not bound isa MVirtualType then return
-
- var mmodule = nclassdef.mclassdef.mmodule
- var anchor = nclassdef.mclassdef.bound_mtype
-
- # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
- var seen = [self.mpropdef.mproperty.mvirtualtype]
- loop
- if seen.has(bound) then
- seen.add(bound)
- modelbuilder.error(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
- return
- end
- seen.add(bound)
- var next = bound.lookup_bound(mmodule, anchor)
- if not next isa MVirtualType then return
- bound = next
- end
- end
-end