From ba25f019012b632f6af9f5addee5058ba6a4e077 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 6 Mar 2018 21:37:39 +0000
Subject: Wrap support for making unique ptrs from functions

---
 service/uptr.h | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 service/uptr.h

(limited to 'service/uptr.h')

diff --git a/service/uptr.h b/service/uptr.h
new file mode 100644
index 0000000..1de1f99
--- /dev/null
+++ b/service/uptr.h
@@ -0,0 +1,38 @@
+#ifndef MIRRORSEARCH_UPTR_H
+#define MIRRORSEARCH_UPTR_H
+
+#include <memory>
+#include <functional>
+
+namespace MirrorSearch {
+	typedef std::function<void(const std::string &)> OnError;
+
+	std::string
+	failingFunction(void * const func);
+
+	void
+	defaultErrorHandler(const std::string &);
+
+	template<typename O> using UPtr = std::unique_ptr<O, void(*)(O*)>;
+
+	template<typename R, typename ... P, typename ... A>
+	R *
+	make_unique(R * (*func)(P...), OnError onError, A ... p)
+	{
+		if (auto obj = func(p...)) {
+			return obj;
+		}
+		onError(failingFunction((void * const)func));
+		throw std::runtime_error("Error handler did not throw");
+	}
+
+	template<typename R, typename ... P, typename ... A>
+	UPtr<R>
+	make_unique(R*(*get)(P...), void(*release)(R*), OnError onError, A ... p)
+	{
+		return std::unique_ptr<R, void(*)(R*)>(make_unique(get, onError, p...), release);
+	}
+}
+
+#endif
+
-- 
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