Added examples for Nit to samples.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>

samples/Nit/clock_more.nit

@@ -0,0 +1,60 @@
+# This file is part of NIT ( http://www.nitlanguage.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.
+
+# This module beef up the clock module by allowing a clock to be comparable.
+# It show the usage of class refinement
+module clock_more
+
+import clock
+
+redef class Clock
+	# Clock are now comparable
+	super Comparable
+
+	# Comparaison of a clock make only sense with an other clock
+	redef type OTHER: Clock
+
+	redef fun <(o)
+	do
+		# Note: < is the only abstract method of Comparable.
+		#       All other operators and methods rely on < and ==.
+		return self.total_minutes < o.total_minutes
+	end
+end
+
+var c1 = new Clock(8, 12)
+var c2 = new Clock(8, 13)
+var c3 = new Clock(9, 13)
+
+print "{c1}<{c2}? {c1<c2}"
+print "{c1}<={c2}? {c1<=c2}"
+print "{c1}>{c2}? {c1>c2}"
+print "{c1}>={c2}? {c1>=c2}"
+print "{c1}<=>{c2}? {c1<=>c2}"
+print "{c1},{c2}? max={c1.max(c2)} min={c1.min(c2)}"
+print "{c1}.is_between({c2}, {c3})? {c1.is_between(c2, c3)}"
+print "{c2}.is_between({c1}, {c3})? {c2.is_between(c1, c3)}"
+
+print "-"
+
+c1.minutes += 1
+
+print "{c1}<{c2}? {c1<c2}"
+print "{c1}<={c2}? {c1<=c2}"
+print "{c1}>{c2}? {c1>c2}"
+print "{c1}>={c2}? {c1>=c2}"
+print "{c1}<=>{c2}? {c1<=>c2}"
+print "{c1},{c2}? max={c1.max(c2)} min={c1.min(c2)}"
+print "{c1}.is_between({c2}, {c3})? {c1.is_between(c2, c3)}"
+print "{c2}.is_between({c1}, {c3})? {c2.is_between(c1, c3)}"