X-Git-Url: http://nitlanguage.org

diff --git a/src/model/model.nit b/src/model/model.nit
index 973cec5..2243a88 100644
--- a/src/model/model.nit
+++ b/src/model/model.nit
@@ -252,8 +252,8 @@ redef class MModule
 	# The primitive type `String`
 	var string_type: MClassType = self.get_primitive_class("String").mclass_type is lazy
 
-	# The primitive type `NativeString`
-	var native_string_type: MClassType = self.get_primitive_class("NativeString").mclass_type is lazy
+	# The primitive type `CString`
+	var c_string_type: MClassType = self.get_primitive_class("CString").mclass_type is lazy
 
 	# A primitive type of `Array`
 	fun array_type(elt_type: MType): MClassType do return array_class.get_mtype([elt_type])
@@ -603,7 +603,7 @@ class MClassDef
 	# ENSURE: `bound_mtype.mclass == self.mclass`
 	var bound_mtype: MClassType
 
-	redef var location: Location
+	redef var location
 
 	redef fun visibility do return mclass.visibility
 
@@ -1058,8 +1058,17 @@ abstract class MType
 	#
 	# `MErrorType` are used in result with conflict or inconsistencies.
 	#
+	# See `is_legal_in` to check conformity with generic bounds.
 	fun is_ok: Bool do return true
 
+	# Is the type legal in a given `mmodule` (with an optional `anchor`)?
+	#
+	# A type is valid if:
+	#
+	# * it does not contain a `MErrorType` (see `is_ok`).
+	# * its generic formal arguments are within their bounds.
+	fun is_legal_in(mmodule: MModule, anchor: nullable MClassType): Bool do return is_ok
+
 	# Can the type be resolved?
 	#
 	# In order to resolve open types, the formal types must make sence.
@@ -1364,6 +1373,18 @@ class MGenericType
 		return super
 	end
 
+	redef fun is_legal_in(mmodule, anchor)
+	do
+		var mtype
+		if need_anchor then
+			assert anchor != null
+			mtype = anchor_to(mmodule, anchor)
+		else
+			mtype = self
+		end
+		if not mtype.is_ok then return false
+		return mtype.is_subtype(mmodule, null, mtype.mclass.intro.bound_mtype)
+	end
 
 	redef fun depth
 	do
@@ -1688,6 +1709,8 @@ abstract class MProxyType
 
 	redef fun is_ok do return mtype.is_ok
 
+	redef fun is_legal_in(mmodule, anchor) do return mtype.is_legal_in(mmodule, anchor)
+
 	redef fun lookup_fixed(mmodule, resolved_receiver)
 	do
 		var t = mtype.lookup_fixed(mmodule, resolved_receiver)