private var modelbuilder_real: nullable ModelBuilder = null
var modelize_class_phase: Phase = new ModelizeClassPhase(self, null)
- var modelize_property_phase: Phase = new ModelizePropertyPhase(self, [modelize_class_phase])
end
private class ModelizeClassPhase
end
end
-private class ModelizePropertyPhase
- super Phase
- redef fun process_nmodule(nmodule)
- do
- for nclassdef in nmodule.n_classdefs do
- toolcontext.modelbuilder.build_properties(nclassdef)
- end
- end
-end
-
# A model builder knows how to load nit source files and build the associated model
class ModelBuilder
# The model where new modules, classes and properties are added
# 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
- nclassdef.build_properties_is_done = true
- 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)
- 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
- if npropdef.mpropdef == null then return # Skip broken attribute
- 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)
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
-
- # What is the APropdef associated to a MProperty?
- # Used to check multiple definition of a property.
- var mprop2npropdef: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
end
redef class AClasskind
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
# Is the mtype a valid one?
var checked_mtype: Bool = false
-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): Bool
- do
- if nclassdef.mprop2npropdef.has_key(mprop) then
- modelbuilder.error(self, "Error: A property {mprop} is already defined in class {nclassdef.mclassdef.mclass}.")
- return false
- end
- 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.")
- return false
- 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.")
- return false
- end
- end
- return true
- 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 = "init"
- 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
- if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mprop) then return
- else
- if n_kwredef == null then
- if self isa AMainMethPropdef then
- # no warning
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mprop) then return
- end
- end
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- end
- nclassdef.mprop2npropdef[mprop] = self
-
- 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}.")
- else if mclass.kind == extern_kind then
- modelbuilder.error(self, "Error: Attempt to define attribute {name} in the extern 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop) then return
- else
- assert mprop isa MAttribute
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop) then return
- end
- nclassdef.mprop2npropdef[mprop] = self
-
- 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, false, mreadprop) then return
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, true, mreadprop) then return
- check_redef_property_visibility(modelbuilder, nclassdef, nreadable.n_visibility, mreadprop)
- end
- nclassdef.mprop2npropdef[mreadprop] = self
-
- 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, false, mwriteprop) then return
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, true, mwriteprop) then return
- check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
- end
- nclassdef.mprop2npropdef[mwriteprop] = self
-
- 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mreadprop) then return
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mreadprop) then return
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mreadprop)
- end
- nclassdef.mprop2npropdef[mreadprop] = self
-
- 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, false, mwriteprop) then return
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, true, mwriteprop) then return
- if nwritable != null then
- check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
- end
- end
- nclassdef.mprop2npropdef[mwriteprop] = self
-
- 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)
- if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop) then return
- else
- if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop) then return
- assert mprop isa MVirtualTypeProp
- check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
- end
- nclassdef.mprop2npropdef[mprop] = self
-
- 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
+end
\ No newline at end of file
--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2012 Jean Privat <jean@pryen.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Analysis and verification of property definitions to instantiate model element
+module modelize_property
+
+import parser
+import model
+import poset
+import opts
+import toolcontext
+import phase
+import modelbuilder
+
+redef class ToolContext
+ var modelize_property_phase: Phase = new ModelizePropertyPhase(self, [modelize_class_phase])
+end
+
+private class ModelizePropertyPhase
+ super Phase
+ redef fun process_nmodule(nmodule)
+ do
+ for nclassdef in nmodule.n_classdefs do
+ toolcontext.modelbuilder.build_properties(nclassdef)
+ end
+ end
+end
+
+redef class ModelBuilder
+ # 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
+ nclassdef.build_properties_is_done = true
+ 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)
+ 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
+ if npropdef.mpropdef == null then return # Skip broken attribute
+ 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
+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
+ 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
+
+ # What is the APropdef associated to a MProperty?
+ # Used to check multiple definition of a property.
+ var mprop2npropdef: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
+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): Bool
+ do
+ if nclassdef.mprop2npropdef.has_key(mprop) then
+ modelbuilder.error(self, "Error: A property {mprop} is already defined in class {nclassdef.mclassdef.mclass}.")
+ return false
+ end
+ 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.")
+ return false
+ 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.")
+ return false
+ end
+ end
+ return true
+ 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 = "init"
+ 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
+ if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mprop) then return
+ else
+ if n_kwredef == null then
+ if self isa AMainMethPropdef then
+ # no warning
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mprop) then return
+ end
+ end
+ check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
+ end
+ nclassdef.mprop2npropdef[mprop] = self
+
+ 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}.")
+ else if mclass.kind == extern_kind then
+ modelbuilder.error(self, "Error: Attempt to define attribute {name} in the extern 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop) then return
+ else
+ assert mprop isa MAttribute
+ check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop) then return
+ end
+ nclassdef.mprop2npropdef[mprop] = self
+
+ 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, false, mreadprop) then return
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nreadable.n_kwredef, true, mreadprop) then return
+ check_redef_property_visibility(modelbuilder, nclassdef, nreadable.n_visibility, mreadprop)
+ end
+ nclassdef.mprop2npropdef[mreadprop] = self
+
+ 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, false, mwriteprop) then return
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nwritable.n_kwredef, true, mwriteprop) then return
+ check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
+ end
+ nclassdef.mprop2npropdef[mwriteprop] = self
+
+ 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, false, mreadprop) then return
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, n_kwredef, true, mreadprop) then return
+ check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mreadprop)
+ end
+ nclassdef.mprop2npropdef[mreadprop] = self
+
+ 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, false, mwriteprop) then return
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, nwkwredef, true, mwriteprop) then return
+ if nwritable != null then
+ check_redef_property_visibility(modelbuilder, nclassdef, nwritable.n_visibility, mwriteprop)
+ end
+ end
+ nclassdef.mprop2npropdef[mwriteprop] = self
+
+ 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)
+ if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, false, mprop) then return
+ else
+ if not self.check_redef_keyword(modelbuilder, nclassdef, self.n_kwredef, true, mprop) then return
+ assert mprop isa MVirtualTypeProp
+ check_redef_property_visibility(modelbuilder, nclassdef, self.n_visibility, mprop)
+ end
+ nclassdef.mprop2npropdef[mprop] = self
+
+ 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
nitlanguage / nit.git / commitdiff