nitc: remove the redundant property `mfree_init`
[nit.git] / src / modelize / modelize_property.nit
index 64ef46c..03d9951 100644 (file)
@@ -110,7 +110,8 @@ redef class ModelBuilder
                                if mpropdef.bound == null then continue
                                if not check_virtual_types_circularity(npropdef, mpropdef.mproperty, mclassdef.bound_mtype, mclassdef.mmodule) then
                                        # Invalidate the bound
-                                       mpropdef.bound = mclassdef.mmodule.model.null_type
+                                       mpropdef.is_broken = true
+                                       mpropdef.bound = new MBottomType(mclassdef.mmodule.model)
                                end
                        end
                        for npropdef in nclassdef2.n_propdefs do
@@ -152,7 +153,6 @@ redef class ModelBuilder
                        mpropdef.msignature = msignature
                        mpropdef.new_msignature = msignature
                        mprop.is_init = true
-                       nclassdef.mfree_init = mpropdef
                        self.toolcontext.info("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
                        the_root_init_mmethod = mprop
                        return
@@ -180,21 +180,20 @@ redef class ModelBuilder
                for npropdef in nclassdef.n_propdefs do
                        if npropdef isa AMethPropdef then
                                if not npropdef.is_autoinit then continue # Skip non tagged autoinit
-                               if npropdef.mpropdef == null then return # Skip broken method
-                               var sig = npropdef.mpropdef.msignature
+                               var mpropdef = npropdef.mpropdef
+                               if mpropdef == null then return # Skip broken method
+                               var sig = mpropdef.msignature
                                if sig == null then continue # Skip broken method
 
-                               for param in sig.mparameters do
-                                       var ret_type = param.mtype
-                                       var mparameter = new MParameter(param.name, ret_type, false, ret_type isa MNullableType)
-                                       mparameters.add(mparameter)
-                               end
-                               initializers.add(npropdef.mpropdef.mproperty)
-                               npropdef.mpropdef.mproperty.is_autoinit = true
+                               mparameters.add_all sig.mparameters
+                               initializers.add(mpropdef.mproperty)
+                               mpropdef.mproperty.is_autoinit = true
                        end
                        if npropdef isa AAttrPropdef then
                                var mreadpropdef = npropdef.mreadpropdef
-                               if mreadpropdef == null or mreadpropdef.msignature == null then return # Skip broken attribute
+                               if mreadpropdef == null then return # Skip broken attribute
+                               var msignature = mreadpropdef.msignature
+                               if msignature == null then return # Skip broken attribute
                                if npropdef.noinit then continue # Skip noinit attribute
                                var atlateinit = npropdef.get_single_annotation("lateinit", self)
                                if atlateinit != null then
@@ -206,9 +205,9 @@ redef class ModelBuilder
                                end
                                if npropdef.has_value then continue
                                var paramname = mreadpropdef.mproperty.name
-                               var ret_type = mreadpropdef.msignature.return_mtype
+                               var ret_type = msignature.return_mtype
                                if ret_type == null then return
-                               var mparameter = new MParameter(paramname, ret_type, false, ret_type isa MNullableType)
+                               var mparameter = new MParameter(paramname, ret_type, false)
                                mparameters.add(mparameter)
                                var msetter = npropdef.mwritepropdef
                                if msetter == null then
@@ -223,6 +222,7 @@ redef class ModelBuilder
                        end
                end
 
+               var the_root_init_mmethod = self.the_root_init_mmethod
                if the_root_init_mmethod == null then return
 
                # Look for most-specific new-stype init definitions
@@ -277,13 +277,7 @@ redef class ModelBuilder
                                if pd isa MMethodDef then
                                        # Get the signature resolved for the current receiver
                                        var sig = pd.msignature.resolve_for(mclassdef.mclass.mclass_type, mclassdef.bound_mtype, mclassdef.mmodule, false)
-                                       # Because the last parameter of setters is never default, try to default them for the autoinit.
-                                       for param in sig.mparameters do
-                                               if not param.is_default and param.mtype isa MNullableType then
-                                                       param = new MParameter(param.name, param.mtype, param.is_vararg, true)
-                                               end
-                                               mparameters.add(param)
-                                       end
+                                       mparameters.add_all(sig.mparameters)
                                else
                                        # TODO attributes?
                                        abort
@@ -305,7 +299,12 @@ redef class ModelBuilder
                                        var i = 0
                                        for p in spd.initializers do
                                                if p != longest.initializers[i] then
-                                                       self.error(nclassdef, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
+                                                       var proposal = new ArraySet[MProperty]
+                                                       for spd2 in spropdefs do
+                                                               proposal.add_all spd2.initializers
+                                                       end
+                                                       proposal.add_all initializers
+                                                       self.error(nclassdef, "Error: cannot generate automatic init for class {mclassdef.mclass}. Conflict in the order in inherited initializers {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")}). Use `autoinit` to order initializers. eg `autoinit {proposal.join(", ")}`")
                                                        # TODO: invalidate the initializer to avoid more errors
                                                        return
                                                end
@@ -349,14 +348,13 @@ redef class ModelBuilder
                end
 
                # Else create the local implicit basic init definition
-               var mprop = the_root_init_mmethod.as(not null)
+               var mprop = the_root_init_mmethod
                var mpropdef = new MMethodDef(mclassdef, mprop, nclassdef.location)
                mpropdef.has_supercall = true
                mpropdef.initializers.add_all(initializers)
                var msignature = new MSignature(mparameters, null)
                mpropdef.new_msignature = msignature
                mpropdef.msignature = new MSignature(new Array[MParameter], null) # always an empty real signature
-               nclassdef.mfree_init = mpropdef
                self.toolcontext.info("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
                mclassdef.mclass.root_init = mpropdef
        end
@@ -374,7 +372,7 @@ redef class ModelBuilder
                mtype = mtype.undecorate
                if mtype isa MClassType then
                        vis_type = mtype.mclass.visibility
-                       mmodule_type = mtype.mclass.intro.mmodule
+                       mmodule_type = mtype.mclass.intro_mmodule
                else if mtype isa MVirtualType then
                        vis_type = mtype.mproperty.visibility
                        mmodule_type = mtype.mproperty.intro_mclassdef.mmodule
@@ -382,6 +380,8 @@ redef class ModelBuilder
                        # nothing, always visible
                else if mtype isa MNullType then
                        # nothing to do.
+               else if mtype isa MBottomType then
+                       # nothing to do.
                else
                        node.debug "Unexpected type {mtype}"
                        abort
@@ -441,8 +441,7 @@ redef class ModelBuilder
                                var vt = t.mproperty
                                # Because `vt` is possibly unchecked, we have to do the bound-lookup manually
                                var defs = vt.lookup_definitions(mmodule, recv)
-                               # TODO something to manage correctly bound conflicts
-                               assert not defs.is_empty
+                               if defs.is_empty then return false
                                nexts = new Array[MType]
                                for d in defs do
                                        var next = defs.first.bound
@@ -487,9 +486,6 @@ end
 redef class AClassdef
        # Marker used in `ModelBuilder::build_properties`
        private var build_properties_is_done = false
-
-       # The free init (implicitely constructed by the class if required)
-       var mfree_init: nullable MMethodDef = null
 end
 
 redef class MClass
@@ -630,12 +626,12 @@ redef class APropdef
                                return false
                        end
 
-                       # Check for full-name conflicts in the project.
-                       # A public property should have a unique qualified name `project::class::prop`.
+                       # Check for full-name conflicts in the package.
+                       # A public property should have a unique qualified name `package::class::prop`.
                        if mprop.intro_mclassdef.mmodule.mgroup != null and mprop.visibility >= protected_visibility then
                                var others = modelbuilder.model.get_mproperties_by_name(mprop.name)
                                if others != null then for other in others do
-                                       if other != mprop and other.intro_mclassdef.mmodule.mgroup != null and other.intro_mclassdef.mmodule.mgroup.mproject == mprop.intro_mclassdef.mmodule.mgroup.mproject and other.intro_mclassdef.mclass.name == mprop.intro_mclassdef.mclass.name and other.visibility >= protected_visibility then
+                                       if other != mprop and other.intro_mclassdef.mmodule.mgroup != null and other.intro_mclassdef.mmodule.mgroup.mpackage == mprop.intro_mclassdef.mmodule.mgroup.mpackage and other.intro_mclassdef.mclass.name == mprop.intro_mclassdef.mclass.name and other.visibility >= protected_visibility then
                                                modelbuilder.advice(self, "full-name-conflict", "Warning: A property named `{other.full_name}` is already defined in module `{other.intro_mclassdef.mmodule}` for the class `{other.intro_mclassdef.mclass.name}`.")
                                                break
                                        end
@@ -721,6 +717,7 @@ redef class ASignature
                                res = false
                        end
                end
+               if not res then is_broken = true
                return res
        end
 end
@@ -832,8 +829,14 @@ redef class AMethPropdef
                        mprop.is_new = n_kwnew != null
                        if mprop.is_new then mclassdef.mclass.has_new_factory = true
                        if name == "sys" then mprop.is_toplevel = true # special case for sys allowed in `new` factories
-                       self.check_redef_keyword(modelbuilder, mclassdef, n_kwredef, false, mprop)
+                       if not self.check_redef_keyword(modelbuilder, mclassdef, n_kwredef, false, mprop) then
+                               mprop.is_broken = true
+                               return
+                       end
                else
+                       if mprop.is_broken then
+                               return
+                       end
                        if not self.check_redef_keyword(modelbuilder, mclassdef, n_kwredef, not self isa AMainMethPropdef, mprop) then return
                        check_redef_property_visibility(modelbuilder, self.n_visibility, mprop)
                end
@@ -842,7 +845,10 @@ redef class AMethPropdef
                if is_init then
                        for p, n in mclassdef.mprop2npropdef do
                                if p != mprop and p isa MMethod and p.name == name then
-                                       check_redef_keyword(modelbuilder, mclassdef, n_kwredef, false, p)
+                                       if not check_redef_keyword(modelbuilder, mclassdef, n_kwredef, false, p) then
+                                               mprop.is_broken = true
+                                               return
+                                       end
                                        break
                                end
                        end
@@ -949,13 +955,7 @@ redef class AMethPropdef
 
                var mparameters = new Array[MParameter]
                for i in [0..param_names.length[ do
-                       var is_default = false
-                       if vararg_rank == -1 and param_types[i] isa MNullableType then
-                               if i < param_names.length-1 or accept_special_last_parameter then
-                                       is_default = true
-                               end
-                       end
-                       var mparameter = new MParameter(param_names[i], param_types[i], i == vararg_rank, is_default)
+                       var mparameter = new MParameter(param_names[i], param_types[i], i == vararg_rank)
                        if nsig != null then nsig.n_params[i].mparameter = mparameter
                        mparameters.add(mparameter)
                end
@@ -1000,13 +1000,14 @@ redef class AMethPropdef
                var mclassdef = mpropdef.mclassdef
                var mmodule = mclassdef.mmodule
                var nsig = self.n_signature
-               var mysignature = self.mpropdef.msignature
+               var mysignature = mpropdef.msignature
                if mysignature == null then return # Error thus skiped
 
                # Check
                if nsig != null then
                        if not nsig.check_signature(modelbuilder, mclassdef) then
-                               self.mpropdef.msignature = null # invalidate
+                               mpropdef.msignature = null # invalidate
+                               mpropdef.is_broken = true
                                return # Forward error
                        end
                end
@@ -1020,8 +1021,9 @@ redef class AMethPropdef
                        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.")
-                               self.mpropdef.msignature = null
+                               modelbuilder.error(nsig.n_type, "Redef Error: `{mpropdef.mproperty}` is a procedure, not a function.")
+                               mpropdef.msignature = null
+                               mpropdef.is_broken = true
                                return
                        end
 
@@ -1033,7 +1035,8 @@ redef class AMethPropdef
                                        var node = nsig.n_params[i]
                                        if not modelbuilder.check_sametype(node, mmodule, mclassdef.bound_mtype, myt, prt) then
                                                modelbuilder.error(node, "Redef Error: expected `{prt}` for parameter `{mysignature.mparameters[i].name}'; got `{myt}`.")
-                                               self.mpropdef.msignature = null
+                                               mpropdef.msignature = null
+                                               mpropdef.is_broken = true
                                        end
                                end
                        end
@@ -1046,12 +1049,13 @@ redef class AMethPropdef
                                        ret_type = precursor_ret_type
                                else if not modelbuilder.check_subtype(node, mmodule, mclassdef.bound_mtype, ret_type, precursor_ret_type) then
                                        modelbuilder.error(node, "Redef Error: expected `{precursor_ret_type}` for return type; got `{ret_type}`.")
-                                       self.mpropdef.msignature = null
+                                       mpropdef.msignature = null
+                                       mpropdef.is_broken = true
                                end
                        end
                end
 
-               if mysignature.arity > 0 then
+               if nsig != null then
                        # Check parameters visibility
                        for i in [0..mysignature.arity[ do
                                var nt = nsig.n_params[i].n_type
@@ -1066,6 +1070,8 @@ redef class AMethPropdef
        # For parameters, type is always useless in a redef.
        # For return type, type is useless if not covariant with introduction.
        redef fun check_repeated_types(modelbuilder) do
+               var mpropdef = self.mpropdef
+               if mpropdef == null then return
                if mpropdef.is_intro or n_signature == null then return
                # check params
                for param in n_signature.n_params do
@@ -1238,7 +1244,9 @@ redef class AAttrPropdef
                        end
                        is_lazy = true
                        var mlazyprop = new MAttribute(mclassdef, "lazy _" + name, none_visibility)
+                       mlazyprop.is_fictive = true
                        var mlazypropdef = new MAttributeDef(mclassdef, mlazyprop, self.location)
+                       mlazypropdef.is_fictive = true
                        self.mlazypropdef = mlazypropdef
                end
 
@@ -1342,11 +1350,28 @@ redef class AAttrPropdef
                        if nexpr != null then
                                if nexpr isa ANewExpr then
                                        mtype = modelbuilder.resolve_mtype_unchecked(mmodule, mclassdef, nexpr.n_type, true)
-                               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 AByteExpr then
-                                       var cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Byte")
+                               else if nexpr isa AAsCastExpr then
+                                       mtype = modelbuilder.resolve_mtype_unchecked(mmodule, mclassdef, nexpr.n_type, true)
+                               else if nexpr isa AIntegerExpr then
+                                       var cla: nullable MClass = null
+                                       if nexpr.value isa Int then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Int")
+                                       else if nexpr.value isa Byte then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Byte")
+                                       else if nexpr.value isa Int8 then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Int8")
+                                       else if nexpr.value isa Int16 then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Int16")
+                                       else if nexpr.value isa UInt16 then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "UInt16")
+                                       else if nexpr.value isa Int32 then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "Int32")
+                                       else if nexpr.value isa UInt32 then
+                                               cla = modelbuilder.try_get_mclass_by_name(nexpr, mmodule, "UInt32")
+                                       else
+                                               # Should not happen, and should be updated as new types are added
+                                               abort
+                                       end
                                        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")
@@ -1398,7 +1423,7 @@ redef class AAttrPropdef
                if mwritepropdef != null then
                        var name: String
                        name = n_id2.text
-                       var mparameter = new MParameter(name, mtype, false, false)
+                       var mparameter = new MParameter(name, mtype, false)
                        var msignature = new MSignature([mparameter], null)
                        mwritepropdef.msignature = msignature
                end
@@ -1515,6 +1540,8 @@ redef class AAttrPropdef
 
        # Type is useless if the attribute type is the same thant the intro.
        redef fun check_repeated_types(modelbuilder) do
+               var mreadpropdef = self.mreadpropdef
+               if mreadpropdef == null then return
                if mreadpropdef.is_intro or n_type == null then return
                # get intro
                var intro = mreadpropdef.mproperty.intro
@@ -1528,7 +1555,7 @@ redef class AAttrPropdef
                        ntype = n_intro.n_type.mtype
                end
                # check
-               if ntype ==null or ntype != n_type.mtype then return
+               if ntype == null or ntype != n_type.mtype or mpropdef == null then return
                modelbuilder.advice(n_type, "useless-signature", "Warning: useless type repetition on redefined attribute `{mpropdef.name}`")
        end
 end
@@ -1538,31 +1565,32 @@ redef class ATypePropdef
 
        redef fun build_property(modelbuilder, mclassdef)
        do
-               var name = self.n_id.text
-               var mprop = modelbuilder.try_get_mproperty_by_name(self.n_id, mclassdef, name)
+               var name = self.n_qid.n_id.text
+               var mprop = modelbuilder.try_get_mproperty_by_name(self.n_qid, mclassdef, name)
                if mprop == null then
                        var mvisibility = new_property_visibility(modelbuilder, mclassdef, self.n_visibility)
                        mprop = new MVirtualTypeProp(mclassdef, name, mvisibility)
                        for c in name.chars do if c >= 'a' and c<= 'z' then
-                               modelbuilder.warning(n_id, "bad-type-name", "Warning: lowercase in the virtual type `{name}`.")
+                               modelbuilder.warning(n_qid, "bad-type-name", "Warning: lowercase in the virtual type `{name}`.")
                                break
                        end
-                       if not self.check_redef_keyword(modelbuilder, mclassdef, self.n_kwredef, false, mprop) then return
                else
-                       if not self.check_redef_keyword(modelbuilder, mclassdef, self.n_kwredef, true, mprop) then return
                        assert mprop isa MVirtualTypeProp
                        check_redef_property_visibility(modelbuilder, self.n_visibility, mprop)
                end
-               mclassdef.mprop2npropdef[mprop] = self
 
                var mpropdef = new MVirtualTypeDef(mclassdef, mprop, self.location)
                self.mpropdef = mpropdef
-               modelbuilder.mpropdef2npropdef[mpropdef] = self
                if mpropdef.is_intro then
                        modelbuilder.toolcontext.info("{mpropdef} introduces new type {mprop.full_name}", 4)
                else
                        modelbuilder.toolcontext.info("{mpropdef} redefines type {mprop.full_name}", 4)
                end
+               if not self.check_redef_keyword(modelbuilder, mclassdef, self.n_kwredef, not mpropdef.is_intro, mprop) then
+                       mpropdef.is_broken =true
+               end
+               mclassdef.mprop2npropdef[mprop] = self
+               modelbuilder.mpropdef2npropdef[mpropdef] = self
                set_doc(mpropdef, modelbuilder)
 
                var atfixed = get_single_annotation("fixed", modelbuilder)
@@ -1610,7 +1638,7 @@ redef class ATypePropdef
                # Check redefinitions
                for p in mpropdef.mproperty.lookup_super_definitions(mmodule, anchor) do
                        var supbound = p.bound
-                       if supbound == null then break # broken super bound, skip error
+                       if supbound == null or supbound isa MBottomType or p.is_broken then break # broken super bound, skip error
                        if p.is_fixed then
                                modelbuilder.error(self, "Redef Error: virtual type `{mpropdef.mproperty}` is fixed in super-class `{p.mclassdef.mclass}`.")
                                break