From 62003d96f3045038a7c9b72f6b0976cd2d919117 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Fri, 12 Jul 2024 11:22:10 +0300
Subject: [PATCH] BAN: Implement Optional::value_or

This will return value specified in the argument if optional is not
storing any value.
---
 BAN/include/BAN/Optional.h | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/BAN/include/BAN/Optional.h b/BAN/include/BAN/Optional.h
index 946ccc05c2..611dff9d00 100644
--- a/BAN/include/BAN/Optional.h
+++ b/BAN/include/BAN/Optional.h
@@ -40,6 +40,8 @@ namespace BAN
 		constexpr T release_value();
 		constexpr T& value();
 		constexpr const T& value() const;
+		constexpr T& value_or(T&);
+		constexpr const T& value_or(const T&) const;
 
 		constexpr void clear();
 
@@ -112,7 +114,7 @@ namespace BAN
 	{
 		clear();
 		m_has_value = other.has_value();
-		if (other.has_value)
+		if (other.has_value())
 			new (m_storage) T(other.value());
 		return *this;
 	}
@@ -185,6 +187,22 @@ namespace BAN
 		return (const T&)m_storage;
 	}
 
+	template<typename T>
+	constexpr T& Optional<T>::value_or(T& empty)
+	{
+		if (!has_value())
+			return empty;
+		return (T&)m_storage;
+	}
+
+	template<typename T>
+	constexpr const T& Optional<T>::value_or(const T& empty) const
+	{
+		if (!has_value())
+			return empty;
+		return (const T&)m_storage;
+	}
+
 	template<typename T>
 	constexpr void Optional<T>::clear()
 	{