Rename to op

src/oi.nim

@@ -1,17 +0,0 @@
-type
-  Err = string
-  OI*[T] = object of RootObj
-    case isOk*: bool
-    of true:
-      val*: T
-    of false:
-      error*: string
-
-proc ok*[T](val: T): OI[T] =
-  OI[T](isOK: true, val: val)
-
-proc fail*(oi: OI, msg: string): OI =
-  OI(isOK: false, error: msg)
-
-proc fail*[T](msg: string): OI[T] =
-  OI[T](isOK: false, error: msg)

src/op.nim

@@ -0,0 +1,17 @@
+type
+  OP*[T] = object of RootObj
+    case isOk*: bool
+    of true:
+      val*: T
+    of false:
+      error*: string
+
+proc ok*[T](val: T): OP[T] =
+  OP[T](isOK: true, val: val)
+
+proc fail*(op: OP, msg: string): OP =
+  OP(isOK: false, error: msg)
+
+proc fail*[T](msg: string): OP[T] =
+  OP[T](isOK: false, error: msg)
+