Init

src/oi.nim

@@ -0,0 +1,17 @@
+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*(msg: string): OI[auto] =
+  OI[auto](isOK: false, error: msg)