From 618481fe1eae8208e5d160eba2ecce6978dd606f Mon Sep 17 00:00:00 2001
From: Nathan Harris <nathan@mordil.info>
Date: Mon, 18 Mar 2019 18:57:59 -0700
Subject: [PATCH] Add `RESPValueConvertible` conformance to `Optional`

---
 .../NIORedis/RESP/RESPValueConvertible.swift    | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Sources/NIORedis/RESP/RESPValueConvertible.swift b/Sources/NIORedis/RESP/RESPValueConvertible.swift
index 323a7cc..9131037 100644
--- a/Sources/NIORedis/RESP/RESPValueConvertible.swift
+++ b/Sources/NIORedis/RESP/RESPValueConvertible.swift
@@ -121,3 +121,20 @@ extension Array: RESPValueConvertible where Element: RESPValueConvertible {
         return RESPValue.array(elements)
     }
 }
+
+extension Optional: RESPValueConvertible where Wrapped: RESPValueConvertible {
+    public init?(_ value: RESPValue) {
+        guard !value.isNull else { return nil }
+        guard let wrapped = Wrapped(value) else { return nil }
+
+        self = .some(wrapped)
+    }
+
+    /// See `RESPValueConvertible.convertedToRESPValue()`.
+    public func convertedToRESPValue() -> RESPValue {
+        switch self {
+        case .none: return .null
+        case let .some(value): return value.convertedToRESPValue()
+        }
+    }
+}