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

diff --git a/src/model/model.nit b/src/model/model.nit
index cd1e570..4395cee 100644
--- a/src/model/model.nit
+++ b/src/model/model.nit
@@ -1762,9 +1762,25 @@ class MSignature
 	# Example: for "(a: Int, b: Bool..., c: Char)" #-> vararg_rank=1
 	var vararg_rank: Int is noinit
 
-	# The number or parameters
+	# The number of parameters
 	fun arity: Int do return mparameters.length
 
+	# The number of non-default parameters
+	#
+	# The number of default parameters is then `arity-min_arity`.
+	#
+	# Note that there cannot be both varargs and default prameters, thus
+	# if `vararg_rank != -1` then `min_arity` == `arity`
+	fun min_arity: Int
+	do
+		if vararg_rank != -1 then return arity
+		var res = 0
+		for p in mparameters do
+			if not p.is_default then res += 1
+		end
+		return res
+	end
+
 	redef fun to_s
 	do
 		var b = new FlatBuffer
@@ -1818,6 +1834,9 @@ class MParameter
 	# Is the parameter a vararg?
 	var is_vararg: Bool
 
+	# Is the parameter a default one?
+	var is_default: Bool
+
 	redef fun to_s
 	do
 		if is_vararg then
@@ -1833,7 +1852,7 @@ class MParameter
 	do
 		if not self.mtype.need_anchor then return self
 		var newtype = self.mtype.resolve_for(mtype, anchor, mmodule, cleanup_virtual)
-		var res = new MParameter(self.name, newtype, self.is_vararg)
+		var res = new MParameter(self.name, newtype, self.is_vararg, self.is_default)
 		return res
 	end