From 415c88db0447bc94ae1624f28dcc4cc9b2d4be63 Mon Sep 17 00:00:00 2001
From: Stewart Stewart <stewinsalot@gmail.com>
Date: Sun, 18 Dec 2016 17:03:16 -0500
Subject: scope SameId to Id

---
 src/main/scala/xyz/driver/core/core.scala | 52 +++++++++++++++----------------
 1 file changed, 25 insertions(+), 27 deletions(-)

diff --git a/src/main/scala/xyz/driver/core/core.scala b/src/main/scala/xyz/driver/core/core.scala
index 1a6bdd7..c88c998 100644
--- a/src/main/scala/xyz/driver/core/core.scala
+++ b/src/main/scala/xyz/driver/core/core.scala
@@ -25,31 +25,6 @@ package object core {
 
 package core {
 
-  /**
-    * Evidence that Id[A] can be safely converted to Id[B].
-    * e.g. `implicit val CaseId = Id.sameId[Case, CasesRow]`
-    * if `CaseId` is in scope, we can use either of:
-    * `casesRowId.asId[Case]` or `caseId.asId[CasesRow]`
-    *  Override convert for custom Id conversions.
-    */
-  @implicitNotFound("No evidence that ${A} has the same Id as ${B}")
-  sealed trait SameId[A, B] {
-    def convert(id: Id[A]): Id[B] = Id[B](id.value)
-  }
-
-  object SameId extends LowPrioritySameIdImplicits {
-    def apply[A, B] = new SameId[A, B] {}
-
-    implicit def reflexive[A]: A ~ A                        = SameId[A, A]
-    implicit def symmetric[A, B](implicit ab: A ~ B): B ~ A = SameId[B, A]
-  }
-
-  trait LowPrioritySameIdImplicits {
-    protected type ~[A, B] = SameId[A, B]
-
-    implicit def transitive[A, B, C](implicit ab: A ~ B, bc: B ~ C): A ~ C = SameId[A, C]
-  }
-
   final case class Id[+Tag](value: String) extends AnyVal {
     @inline def length: Int       = value.length
     override def toString: String = value
@@ -59,11 +34,34 @@ package core {
     implicit def idEqual[T]: Equal[Id[T]]       = Equal.equal[Id[T]](_ == _)
     implicit def idOrdering[T]: Ordering[Id[T]] = Ordering.by[Id[T], String](_.value)
 
+    /**
+      * Evidence that Id[A] can be safely converted to Id[B].
+      * e.g. `implicit val CaseId = Id.SameId[Case, CasesRow]`
+      * if `CaseId` is in scope, we can use either of:
+      * `casesRowId.asId[Case]` or `caseId.asId[CasesRow]`
+      *  Override convert for custom Id conversions.
+      */
+    @implicitNotFound("No evidence that ${A} has the same Id as ${B}")
+    sealed trait SameId[A, B] {
+      def convert(id: Id[A]): Id[B] = Id[B](id.value)
+    }
+
+    object SameId extends LowPrioritySameIdImplicits {
+      def apply[A, B] = new SameId[A, B] {}
+
+      implicit def reflexive[A]: A ~ A                        = SameId[A, A]
+      implicit def symmetric[A, B](implicit ab: A ~ B): B ~ A = SameId[B, A]
+    }
+
+    trait LowPrioritySameIdImplicits {
+      protected type ~[A, B] = SameId[A, B]
+
+      implicit def transitive[A, B, C](implicit ab: A ~ B, bc: B ~ C): A ~ C = SameId[A, C]
+    }
+
     implicit class InvariantIdOps[Tag](id: Id[Tag]) {
       def asId[T](implicit eq: SameId[Tag, T]): Id[T] = eq.convert(id)
     }
-
-    def sameId[A, B] = SameId[A, B]
   }
 
   final case class Name[+Tag](value: String) extends AnyVal {
-- 
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