1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/scala/xyz/driver/core/core.scala b/src/main/scala/xyz/driver/core/core.scala
new file mode 100644
index 0000000..b7fbeb6
--- /dev/null
+++ b/src/main/scala/xyz/driver/core/core.scala
@@ -0,0 +1,46 @@
+package xyz.driver
+
+import scalaz.Equal
+
+package object core {
+  import scala.language.reflectiveCalls
+
+  def make[T](v: => T)(f: T => Unit): T = {
+    val value = v; f(value); value
+  }
+
+  def using[R <: { def close() }, P](r: => R)(f: R => P): P = {
+    val resource = r
+    try {
+      f(resource)
+    } finally {
+      resource.close()
+    }
+  }
+
+  object tagging {
+    private[core] trait Tagged[+V, +Tag]
+  }
+  type @@[+V, +Tag] = V with tagging.Tagged[V, Tag]
+
+  type Id[+Tag] = Long @@ Tag
+  object Id {
+    def apply[Tag](value: Long) = value.asInstanceOf[Id[Tag]]
+  }
+  implicit def idEqual[T]: Equal[Id[T]]       = Equal.equal[Id[T]](_ == _)
+  implicit def idOrdering[T]: Ordering[Id[T]] = Ordering.by(i => i: Long)
+
+  type Name[+Tag] = String @@ Tag
+  object Name {
+    def apply[Tag](value: String) = value.asInstanceOf[Name[Tag]]
+  }
+
+  implicit def nameEqual[T]: Equal[Name[T]]       = Equal.equal[Name[T]](_ == _)
+  implicit def nameOrdering[T]: Ordering[Name[T]] = Ordering.by(n => n: String)
+
+  object revision {
+    final case class Revision[T](id: String)
+
+    implicit def revisionEqual[T]: Equal[Revision[T]] = Equal.equal[Revision[T]](_.id == _.id)
+  }
+}