From f43314cb53d9666f75e9dc09b01ae105ec09a6f4 Mon Sep 17 00:00:00 2001
From: kayomn <kayomn@kayomn.net>
Date: Mon, 27 Feb 2023 00:46:12 +0000
Subject: [PATCH] Reimplement coral::optional::and_then

---
 source/coral.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source/coral.cpp b/source/coral.cpp
index ad03759..ace6e29 100644
--- a/source/coral.cpp
+++ b/source/coral.cpp
@@ -382,6 +382,13 @@ export namespace coral {
 			}
 		}
 
+		/**
+		 * Invokes the `apply` procedure if the optional is not empty, otherwise having no side-effects.
+		 */
+		void and_then(closure<void(element &)> const & apply) {
+			if (this->has_value()) apply(**this);
+		}
+
 		/**
 		 * Returns `true` if the optional contains a value, otherwise `false`.
 		 */