From e5bef3f97f1c3d285d367e6006855ed653cbb591 Mon Sep 17 00:00:00 2001
From: Automatic Release Builder <build@flightgear.org>
Date: Thu, 3 Feb 2022 12:52:58 +0000
Subject: [PATCH] Extend simgear::Optional with value_or

Needed to allow parity with C++17 use on next
---
 simgear/misc/simgear_optional.hxx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/simgear/misc/simgear_optional.hxx b/simgear/misc/simgear_optional.hxx
index 07ad6789..dcfd0ff8 100644
--- a/simgear/misc/simgear_optional.hxx
+++ b/simgear/misc/simgear_optional.hxx
@@ -74,6 +74,22 @@ public:
         return _value;
     }
 
+    const T& value_or(const T& defaultValue) const
+    {
+        if (!_haveValue) {
+            return defaultValue;
+        }
+        return _value;
+    }
+
+    T& value_or(T& defaultValue) const
+    {
+        if (!_haveValue) {
+            return defaultValue;
+        }
+        return _value;
+    }
+
     T& value()
     {
         if (!_haveValue) {