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| -rw-r--r-- | src/library/scala/Ordering.scala | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/library/scala/Ordering.scala b/src/library/scala/Ordering.scala new file mode 100644 index 0000000000..9ae63fd641 --- /dev/null +++ b/src/library/scala/Ordering.scala @@ -0,0 +1,24 @@ +/* __ *\ +** ________ ___ / / ___ Scala API ** +** / __/ __// _ | / / / _ | (c) 2003-2008, LAMP/EPFL ** +** __\ \/ /__/ __ |/ /__/ __ | ** +** /____/\___/_/ |_/____/_/ | | ** +** |/ ** +\* */ + +// $Id$ + +package scala + +/** A trait for representing total orderings. + * @author Geoffrey Washburn + * @version 0.9, 2008-03-19 + */ + +trait Ordering[T] extends Equiv[T] { + def compare(x: T, y: T): Int + def gteq(x: T, y: T): Boolean = compare(x, y) >= 0 + def lteq(x: T, y: T): Boolean = compare(x, y) <= 0 + def lt(x: T, y: T): Boolean = compare(x, y) < 0 + def gt(x: T, y: T): Boolean = compare(x, y) > 0 +} |