From 901c299c40fb30c8de38d7a68710ac60323bd74b Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Thu, 13 Dec 2018 01:28:55 +0900
Subject: [PATCH] add unwrap_or to result

---
 toml/result.hpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/toml/result.hpp b/toml/result.hpp
index e0085f7..90ff1d5 100644
--- a/toml/result.hpp
+++ b/toml/result.hpp
@@ -394,6 +394,25 @@ struct result
         return std::move(this->succ.value);
     }
 
+    template<typename U>
+    value_type&       unwrap_or(U& opt) &
+    {
+        if(is_err()) {return opt;}
+        return this->succ.value;
+    }
+    template<typename U>
+    value_type const& unwrap_or(U const& opt) const&
+    {
+        if(is_err()) {return opt;}
+        return this->succ.value;
+    }
+    template<typename U>
+    value_type&&      unwrap_or(U&& opt) &&
+    {
+        if(is_err()) {return std::move(opt);}
+        return std::move(this->succ.value);
+    }
+
     error_type&       unwrap_err() &
     {
         if(is_ok()) {throw std::runtime_error("toml::result: bad unwrap_err");}