Add hours and days

src/main/scala/libra/imperial/package.scala

@@ -0,0 +1,27 @@
+package libra
+
+import ops.base.{Show, ConversionFactor}
+import spire._, spire.algebra._, spire.math._, spire.implicits._
+import singleton.ops._
+import libra.si.Time
+
+/* Imperial units */
+package object imperial {
+
+  /** Time units */
+  trait Day extends Unit[Time]
+  trait Hour extends Unit[Time]
+
+  implicit def dayShow: Show[Day] = Show[Day]("days")
+  implicit def hourShow: Show[Hour] = Show[Hour]("hours")
+
+  implicit def dayHourConversion[A](
+    implicit c: ConvertableTo[A]
+  ): ConversionFactor[A, Time, Day, Hour] =
+    new ConversionFactor(c.fromInt(24))
+
+  implicit final class BaseQuantityImperialOps[A](val a: A) extends AnyVal {
+    def days: QuantityOf[A, Time, Day] = Quantity(a)
+    def hours: QuantityOf[A, Time, Hour] = Quantity(a)
+  }
+}

src/test/scala/libra/ImperialSpec.scala

@@ -0,0 +1,29 @@
+package libra
+
+import spire.implicits._
+import libra.imperial._, libra.si._
+
+import org.scalatest._
+
+class ImperialSpec extends WordSpec {
+
+  "day" should {
+    "show" in {
+      assert(2.days.show === ("2 days [T]"))
+    }
+
+    "hour value" in {
+      assert(2.0.days.to[Hour].value === (48.0))
+    }
+  }
+
+  "hour" should {
+    "show" in {
+      assert(2.hours.show === ("2 hours [T]"))
+    }
+
+    "day value" in {
+      assert(24.0.hours.to[Day].value === (1.0))
+    }
+  }
+}