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Diffstat (limited to 'library/src/scala/Eq.scala')
| -rw-r--r-- | library/src/scala/Eq.scala | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/library/src/scala/Eq.scala b/library/src/scala/Eq.scala new file mode 100644 index 000000000..d6d617cab --- /dev/null +++ b/library/src/scala/Eq.scala @@ -0,0 +1,14 @@ +package scala + +import annotation.implicitNotFound + +/** A marker trait indicating that values of type `L` can be compared to values of type `R`. */ +@implicitNotFound("Values of types ${L} and ${R} cannot be compared with == or !=") +sealed trait Eq[-L, -R] + +/** Besides being a companion object, this object + * can also be used as a value that's compatible with + * any instance of `Eq`. + */ +object Eq extends Eq[Any, Any] + |