From 6d4855d4ad1a07f083aae01bdc233364c2ba8e02 Mon Sep 17 00:00:00 2001
From: Gary Talent <gary@drinkingtea.net>
Date: Sat, 23 Dec 2023 17:52:20 -0600
Subject: [PATCH] [ox/std] Add Result::orVal

(synced from 45ec39f77bf4c7f980cd66847798853988873964)
---
 src/ox/std/error.hpp | 48 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/ox/std/error.hpp b/src/ox/std/error.hpp
index a3de89525..af36c1046 100644
--- a/src/ox/std/error.hpp
+++ b/src/ox/std/error.hpp
@@ -264,6 +264,54 @@ struct [[nodiscard]] Result {
 		return f(std::move(value));
 	}
 
+	/**
+	 * Returns parameter alt if Result contains an error.
+	 * @param alt
+	 * @return value of Result or alt
+	 */
+	constexpr T orVal(T &&alt) & noexcept {
+		if (error) {
+			return std::move(alt);
+		}
+		return value;
+	}
+
+	/**
+	 * Returns parameter alt if Result contains an error.
+	 * @param alt
+	 * @return value of Result or alt
+	 */
+	constexpr T orVal(T &&alt) && noexcept {
+		if (error) {
+			return std::move(alt);
+		}
+		return std::move(value);
+	}
+
+	/**
+	 * Returns parameter alt if Result contains an error.
+	 * @param alt
+	 * @return value of Result or alt
+	 */
+	constexpr T orVal(T const&alt) & noexcept {
+		if (error) {
+			return alt;
+		}
+		return value;
+	}
+
+	/**
+	 * Returns parameter alt if Result contains an error.
+	 * @param alt
+	 * @return value of Result or alt
+	 */
+	constexpr T orVal(T const&alt) && noexcept {
+		if (error) {
+			return alt;
+		}
+		return std::move(value);
+	}
+
 };
 
 namespace detail {