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	diff --git a/include/HEJ/RNG.hh b/include/HEJ/RNG.hh
	index cfa5f9b..e31bda0 100644
	--- a/include/HEJ/RNG.hh
	+++ b/include/HEJ/RNG.hh
	@@ -1,46 +1,47 @@
	/** \file
	* \brief Interface for pseudorandom number generators
	*
	* We select our random number generator at runtime according to the
	* configuration file. This interface guarantees that we can use all
	* generators in the same way.
	*
	* \authors The HEJ collaboration (see AUTHORS for details)
	* \date 2019
	* \copyright GPLv2 or later
	*/
	#pragma once

	#include <limits>

	namespace HEJ {

	//! Interface for random number generator
	struct RNG {
	- typedef unsigned result_type;
	+ using result_type = unsigned;
	+
	//! Generate random number in (0,1]
	virtual double flat() = 0;

	//! Minimum number that can be generated
	virtual result_type min() const = 0;
	//! Maximum number that can be generated
	virtual result_type max() const = 0;
	//! Generate random number in [min(), max()]
	virtual result_type operator()() = 0;

	virtual ~RNG() = default;
	};

	//! Helper struct with default implementations
	struct DefaultRNG : virtual RNG {
	result_type min() const override {
	return 0u;
	}
	result_type max() const override {
	return std::numeric_limits<result_type>::max() - 1;
	}
	result_type operator()() override {
	return flat()*std::numeric_limits<result_type>::max();
	}
	};
	} // namespace HEJ

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