Rename REAMDE to README.md
[nit.git] / src / model_utils.nit
index 0d5b754..24105e6 100644 (file)
 # Model exploration and traversing facilities
 module model_utils
 
-import toolcontext
-import exprbuilder
+import model
+
+redef class MConcern
+
+       # Boost a MConcern rank
+       # see: `MConcernRankSorter`
+       # Use a positive booster to push down a result in the list
+       # A negative booster can be used to push up the result
+       var booster_rank: Int = 0 is writable
+
+       # Concern ranking used for ordering
+       # see: `MConcernRankSorter`
+       # Rank can be positive or negative
+       fun concern_rank: Int is abstract
+end
+
+redef class MProject
+       redef var concern_rank is lazy do
+               var max = 0
+               for mgroup in mgroups do
+                       var mmax = mgroup.concern_rank
+                       if mmax > max then max = mmax
+               end
+               return max + 1
+       end
+end
+
+redef class MGroup
+       fun in_nesting_intro_mclasses(min_visibility: MVisibility): Set[MClass] do
+               var res = new HashSet[MClass]
+               var lst = in_nesting.direct_smallers
+               for mmodule in mmodules do res.add_all mmodule.filter_intro_mclasses(min_visibility)
+               for mgrp in lst do res.add_all mgrp.in_nesting_intro_mclasses(min_visibility)
+               return res
+       end
+
+       fun in_nesting_redef_mclasses(min_visibility: MVisibility): Set[MClass] do
+               var res = new HashSet[MClass]
+               var lst = in_nesting.direct_smallers
+               for mmodule in mmodules do res.add_all mmodule.filter_redef_mclasses(min_visibility)
+               for mgrp in lst do res.add_all mgrp.in_nesting_redef_mclasses(min_visibility)
+               return res
+       end
+
+       fun in_nesting_intro_mclassdefs(min_visibility: MVisibility): Set[MClassDef] do
+               var res = new HashSet[MClassDef]
+               var lst = in_nesting.direct_smallers
+               for mmodule in mmodules do res.add_all mmodule.intro_mclassdefs(min_visibility)
+               for mgrp in lst do res.add_all mgrp.in_nesting_intro_mclassdefs(min_visibility)
+               return res
+       end
+
+       fun in_nesting_redef_mclassdefs(min_visibility: MVisibility): Set[MClassDef] do
+               var res = new HashSet[MClassDef]
+               var lst = in_nesting.direct_smallers
+               for mmodule in mmodules do res.add_all mmodule.redef_mclassdefs(min_visibility)
+               for mgrp in lst do res.add_all mgrp.in_nesting_redef_mclassdefs(min_visibility)
+               return res
+       end
+
+       # Collect nested modules
+       fun collect_mmodules: Set[MModule] do
+               var res = new HashSet[MModule]
+               res.add_all mmodules
+               for mgroup in in_nesting.direct_smallers do
+                       res.add_all mgroup.collect_mmodules
+               end
+               return res
+       end
+
+       redef var concern_rank is lazy do
+               var max = 0
+               for mmodule in collect_mmodules do
+                       var mmax = mmodule.concern_rank
+                       if mmax > max then max = mmax
+               end
+               return max + 1
+       end
+end
 
 redef class MModule
+
+       # The list of intro mclassdef in the module.
+       # with visibility >= to min_visibility
+       fun intro_mclassdefs(min_visibility: MVisibility): Set[MClassDef] do
+               var res = new HashSet[MClassDef]
+               for mclassdef in mclassdefs do
+                       if not mclassdef.is_intro then continue
+                       if mclassdef.mclass.visibility < min_visibility then continue
+                       res.add mclassdef
+               end
+               return res
+       end
+
+       # The list of redef mclassdef in the module.
+       # with visibility >= to min_visibility
+       fun redef_mclassdefs(min_visibility: MVisibility): Set[MClassDef] do
+               var res = new HashSet[MClassDef]
+               for mclassdef in mclassdefs do
+                       if mclassdef.is_intro then continue
+                       if mclassdef.mclass.visibility < min_visibility then continue
+                       res.add mclassdef
+               end
+               return res
+       end
+
+       # The list of intro mclass in the module.
+       # with visibility >= to min_visibility
+       fun filter_intro_mclasses(min_visibility: MVisibility): Set[MClass] do
+               var res = new HashSet[MClass]
+               for mclass in intro_mclasses do
+                       if mclass.visibility < min_visibility then continue
+                       res.add mclass
+               end
+               return res
+       end
+
        # Get the list of mclasses refined in 'self'.
        fun redef_mclasses: Set[MClass] do
                var mclasses = new HashSet[MClass]
@@ -30,6 +143,16 @@ redef class MModule
                return mclasses
        end
 
+       # Get the list of mclasses refined in 'self'.
+       fun filter_redef_mclasses(min_visibility: MVisibility): Set[MClass] do
+               var mclasses = new HashSet[MClass]
+               for c in mclassdefs do
+                       if c.mclass.visibility < min_visibility then continue
+                       if not c.is_intro then mclasses.add(c.mclass)
+               end
+               return mclasses
+       end
+
        # Get the list of all mclasses imported by 'self'.
        fun imported_mclasses: Set[MClass] do
                var mclasses = new HashSet[MClass]
@@ -39,19 +162,35 @@ redef class MModule
                end
                return mclasses
        end
-end
 
-redef class MClass
+       redef var concern_rank is lazy do
+               var max = 0
+               for p in in_importation.direct_greaters do
+                       var pmax = p.concern_rank
+                       if pmax > max then max = pmax
+               end
+               return max + 1
+       end
 
-       # Get the public owner of 'self'.
-       fun public_owner: MModule do
-               var public_owner = self.intro_mmodule.public_owner
-               if public_owner == null then
-                       return self.intro_mmodule
-               else
-                       return public_owner
+       # Find all mmodules nested in `self` if `self` is the default module of a `MGroup`.
+       fun nested_mmodules: Array[MModule] do
+               var res = new Array[MModule]
+               var mgroup = mgroup
+               if mgroup == null or self != mgroup.default_mmodule then return res
+               for mmodule in mgroup.mmodules do
+                       if mmodule == self then continue
+                       res.add mmodule
+               end
+               for nested in mgroup.in_nesting.direct_smallers do
+                       var default = nested.default_mmodule
+                       if default == null then continue
+                       res.add default
                end
+               return res
        end
+end
+
+redef class MClass
 
        # Get direct parents of 'self'.
        fun parents: Set[MClass] do
@@ -126,58 +265,107 @@ redef class MClass
                return res
        end
 
-       # Get the set of properties introduced in 'self'.
-       fun intro_mproperties: Set[MProperty] do
-               var res = new HashSet[MProperty]
+       # the set of properties introduced in 'self'.
+       fun intro_mproperties(min_visibility: MVisibility): Set[MProperty] do
+               var set = new HashSet[MProperty]
+               for mclassdef in mclassdefs do
+                       for mprop in mclassdef.intro_mproperties do
+                               if mprop.visibility < min_visibility then continue
+                               set.add(mprop)
+                       end
+               end
+               return set
+       end
+
+       fun intro_mpropdefs(min_visibility: MVisibility): Set[MPropDef] do
+               var set = new HashSet[MPropDef]
                for mclassdef in mclassdefs do
                        for mpropdef in mclassdef.mpropdefs do
-                               if mpropdef.is_intro then res.add(mpropdef.mproperty)
+                               if not mpropdef.is_intro then continue
+                               if mpropdef.mproperty.visibility < min_visibility then continue
+                               set.add(mpropdef)
                        end
                end
-               return res
+               return set
        end
 
-       # Get the list of locally refined methods in 'self'.
-       fun redef_methods: Set[MMethod] do
-               var res = new HashSet[MMethod]
+       # the set of locally refined properties in 'self'.
+       fun redef_mproperties(min_visibility: MVisibility): Set[MProperty] do
+               var set = new HashSet[MProperty]
                for mclassdef in mclassdefs do
                        for mpropdef in mclassdef.mpropdefs do
-                               if mpropdef isa MMethodDef then
-                                       if not mpropdef.is_intro and not mpropdef.mproperty.is_init then res.add(mpropdef.mproperty)
-                               end
+                               if mpropdef.mproperty.visibility < min_visibility then continue
+                               if mpropdef.mproperty.intro_mclassdef.mclass != self then set.add(mpropdef.mproperty)
                        end
                end
-               return res
+               return set
        end
 
-       # Get the set of locally refined properties in 'self'.
-       fun redef_mproperties: Set[MProperty] do
-               var res = new HashSet[MProperty]
+       fun redef_mpropdefs(min_visibility: MVisibility): Set[MPropDef] do
+               var set = new HashSet[MPropDef]
                for mclassdef in mclassdefs do
                        for mpropdef in mclassdef.mpropdefs do
-                               if not mpropdef.is_intro then res.add(mpropdef.mproperty)
+                               if mpropdef.is_intro then continue
+                               if mpropdef.mproperty.visibility < min_visibility then continue
+                               set.add(mpropdef)
                        end
                end
-               return res
+               return set
        end
 
-       # Get the list of methods inherited by 'self'.
-       fun inherited_methods: Set[MMethod] do
+       # the set of methods inherited by 'self'.
+       fun inherited_mproperties(mainmodule: MModule, min_visibility: MVisibility): Set[MProperty] do
+               var set = new HashSet[MProperty]
+               for parent in in_hierarchy(mainmodule).direct_greaters do
+                       set.add_all(parent.intro_mproperties(min_visibility))
+                       set.add_all(parent.inherited_mproperties(mainmodule, min_visibility))
+               end
+               return set
+       end
+
+       # the set of introduced and redefined mproperties
+       fun local_mproperties(min_visibility: MVisibility): Set[MProperty] do
+               var set = new HashSet[MProperty]
+               set.add_all(intro_mproperties(min_visibility))
+               set.add_all(redef_mproperties(min_visibility))
+               return set
+       end
+
+       # the set of all accessible mproperties for this class
+       fun all_mproperties(mainmodule: MModule, min_visibility: MVisibility): Set[MProperty] do
+               var set = new HashSet[MProperty]
+               set.add_all(local_mproperties(min_visibility))
+               set.add_all(inherited_mproperties(mainmodule, min_visibility))
+               return set
+       end
+
+       # the set of all accessible mattributes for this class
+       fun all_mattributes(mainmodule: MModule, min_visibility: MVisibility): Set[MAttribute] do
+               var set = new HashSet[MAttribute]
+               for mprop in all_mproperties(mainmodule, min_visibility) do
+                       if mprop isa MAttribute then set.add(mprop)
+               end
+               return set
+       end
+
+       # Get the list of locally refined methods in 'self'.
+       fun redef_methods: Set[MMethod] do
                var res = new HashSet[MMethod]
-               for s in ancestors do
-                       for m in s.intro_methods do
-                               if not self.intro_methods.has(m) and not self.redef_methods.has(m) then res.add(m)
+               for mclassdef in mclassdefs do
+                       for mpropdef in mclassdef.mpropdefs do
+                               if mpropdef isa MMethodDef then
+                                       if not mpropdef.is_intro and not mpropdef.mproperty.is_init then res.add(mpropdef.mproperty)
+                               end
                        end
                end
                return res
        end
 
-       # Get the set of all properties inherited by self
-       fun inherited_mproperties: Set[MProperty] do
-               var res = new HashSet[MProperty]
+       fun inherited_methods: Set[MMethod] do
+               var res = new HashSet[MMethod]
                for s in ancestors do
-                       for m in s.intro_mproperties do
-                               if not self.intro_mproperties.has(m) and not self.redef_mproperties.has(m) then res.add(m)
+                       for m in s.intro_methods do
+                               if not self.intro_methods.has(m) and not self.redef_methods.has(m) then res.add(m)
                        end
                end
                return res
@@ -208,8 +396,8 @@ redef class MClass
        # Get the list of all parameter types in 'self'.
        fun parameter_types: Map[String, MType] do
                var res = new HashMap[String, MType]
-               for i in [0..intro.parameter_names.length[ do
-                       res[intro.parameter_names[i]] = intro.bound_mtype.arguments[i]
+               for p in mparameters do
+                       res[p.name] = p
                end
                return res
        end
@@ -229,4 +417,117 @@ redef class MClass
        fun is_abstract: Bool do
                return self.kind == abstract_kind
        end
-end
\ No newline at end of file
+end
+
+redef class MAttribute
+       # Is this attribute nullable for sure?
+       #
+       # This mean that its introduction is declarred with a nullable static type
+       # since attributes are invariant this will work on most cases
+       # attributes with static type anchored with a virtual type are not "nullable for-sure"
+       # because this type can be redefined in subclasses
+       fun is_nullable: Bool do return intro.static_mtype isa MNullableType
+end
+
+redef class MClassDef
+       # modifiers are keywords like redef, private etc.
+       fun modifiers: Array[String] do
+               var res = new Array[String]
+               if not is_intro then
+                       res.add "redef"
+               else
+                       res.add mclass.visibility.to_s
+               end
+               res.add mclass.kind.to_s
+               return res
+       end
+
+       fun collect_mpropdefs(min_visibility: MVisibility): Set[MPropDef] do
+               var res = new HashSet[MPropDef]
+               for mpropdef in mpropdefs do
+                       if mpropdef.mproperty.visibility < min_visibility then continue
+                       res.add mpropdef
+               end
+               return res
+       end
+
+       fun collect_intro_mpropdefs(min_visibility: MVisibility): Set[MPropDef] do
+               var res = new HashSet[MPropDef]
+               for mpropdef in mpropdefs do
+                       if not mpropdef.is_intro then continue
+                       if mpropdef.mproperty.visibility < min_visibility then continue
+                       res.add mpropdef
+               end
+               return res
+       end
+
+       fun collect_redef_mpropdefs(min_visibility: MVisibility): Set[MPropDef] do
+               var res = new HashSet[MPropDef]
+               for mpropdef in mpropdefs do
+                       if mpropdef.is_intro then continue
+                       if mpropdef.mproperty.visibility < min_visibility then continue
+                       res.add mpropdef
+               end
+               return res
+       end
+end
+
+redef class MPropDef
+       # modifiers are keywords like redef, private etc.
+       fun modifiers: Array[String] do
+               var res = new Array[String]
+               if not is_intro then
+                       res.add "redef"
+               else
+                       res.add mproperty.visibility.to_s
+               end
+               var mprop = self
+               if mprop isa MVirtualTypeDef then
+                       res.add "type"
+               else if mprop isa MMethodDef then
+                       if mprop.is_abstract then
+                               res.add "abstract"
+                       else if mprop.is_intern then
+                               res.add "intern"
+                       end
+                       if mprop.mproperty.is_init then
+                               res.add "init"
+                       else
+                               res.add "fun"
+                       end
+               end
+               return res
+       end
+end
+
+# Sorters
+
+# Sort mentities by their name
+class MEntityNameSorter
+       super Comparator
+       redef type COMPARED: MEntity
+       redef fun compare(a, b) do return a.name <=> b.name
+end
+
+# Sort MConcerns based on the module importation hierarchy ranking
+# see also: `MConcern::concern_rank` and `MConcern::booster_rank`
+#
+# Comparison is made with the formula:
+#
+# ~~~nitish
+# a.concern_rank + a.booster_rank <=> b.concern_rank + b.booster_ran
+# ~~~
+#
+# If both `a` and `b` have the same ranking,
+# ordering is based on lexicographic comparison of `a.name` and `b.name`
+class MConcernRankSorter
+       super Comparator
+       redef type COMPARED: MConcern
+
+       redef fun compare(a, b) do
+               if a.concern_rank == b.concern_rank then
+                       return a.name <=> b.name
+               end
+               return a.concern_rank + a.booster_rank <=> b.concern_rank + b.booster_rank
+       end
+end