From 741a2f0638761d3058f8094f591fdc3c56c9ebf3 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 16 Mar 2021 00:57:33 +0000
Subject: Add requires on factory like functions

---
 lib/worker.h | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'lib/worker.h')

diff --git a/lib/worker.h b/lib/worker.h
index 04e351b..7df16cd 100644
--- a/lib/worker.h
+++ b/lib/worker.h
@@ -2,6 +2,7 @@
 #define WORKER_H
 
 #include <utility>
+class Work;
 
 #if __cpp_lib_semaphore
 #	include <deque>
@@ -12,8 +13,6 @@
 #	include <thread>
 #	include <vector>
 
-class Work;
-
 class Worker {
 public:
 	Worker();
@@ -26,7 +25,7 @@ public:
 
 	template<typename T, typename... Params>
 	void
-	addWork(Params &&... params)
+	addWork(Params &&... params) requires std::is_base_of_v<Work, T>
 	{
 		addWork(std::make_unique<T>(std::forward<Params>(params)...));
 	}
@@ -51,7 +50,7 @@ class Worker {
 public:
 	template<typename T, typename... Params>
 	void
-	addWork(Params &&... params)
+	addWork(Params &&... params) requires std::is_base_of_v<Work, T>
 	{
 		T(std::forward<Params>(params)...).doWork();
 	}
-- 
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