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diff --git a/include/HEJ/utility.hh b/include/HEJ/utility.hh
index 997dce8..b57d7df 100644
--- a/include/HEJ/utility.hh
+++ b/include/HEJ/utility.hh
@@ -1,104 +1,104 @@
/**
* \file
* \brief Contains various utilities
*
* \authors The HEJ collaboration (see AUTHORS for details)
* \date 2019-2020
* \copyright GPLv2 or later
*/
#pragma once
#include <array>
#include <memory>
#include <string>
#include "boost/core/demangle.hpp"
#include "fastjet/PseudoJet.hh"
namespace HEJ {
inline
std::string join(
std::string const & /* delim */
){
return "";
}
inline
std::string join(
std::string const & /* delim */, std::string const & str
){
return str;
}
//! Join strings with a delimiter
/**
* @param delim Delimiter to be put between consecutive strings
* @param first First string
* @param second Second string
* @param rest Remaining strings
*/
template<typename... Strings>
std::string join(
std::string const & delim,
std::string const & first, std::string const & second,
Strings&&... rest
){
return join(delim, first + delim + second, std::forward<Strings>(rest)...);
}
//! Return the name of the argument's type
template<typename T>
std::string type_string(T&& /*unused*/){
return boost::core::demangle(typeid(T).name());
}
//! Eliminate compiler warnings for unused variables
template<typename... T>
constexpr void ignore(T&&... /*unused*/) {}
- //! Check whether two doubles are closer than ep > 0 to each other
+ //! Check whether two doubles are closer than ep >= 0 to each other
inline
constexpr bool nearby_ep(double a, double b, double ep){
- assert(ep > 0);
+ assert(ep >= 0);
return std::abs(a-b) < ep;
}
//! Check whether all components of two PseudoJets are closer than ep to each other
inline
bool nearby_ep(
fastjet::PseudoJet const & pa, fastjet::PseudoJet const & pb,
double ep
){
- assert(ep > 0);
+ assert(ep >= 0);
for(size_t i = 0; i < 4; ++i){
if(!nearby_ep(pa[i], pb[i], ep)) return false;
}
return true;
}
inline
bool nearby(
fastjet::PseudoJet const & pa, fastjet::PseudoJet const & pb,
double const norm = 1.
){
return nearby_ep(pa, pb, 1e-7*norm);
}
namespace detail {
template<typename T, std::size_t N, std::size_t... Ns>
struct ArrayTag{
using type = typename ArrayTag<std::array<T, N>, Ns...>::type;
};
template<typename T, std::size_t N>
struct ArrayTag<T, N> {
using type = std::array<T, N>;
};
}
// helper for multidimensional std::array, for example
// MultiArray<T, N1, N2> = std::array<std::array<T, N1>, N2>
template<typename T, std::size_t N, std::size_t... Ns>
using MultiArray = typename detail::ArrayTag<T, N, Ns...>::type;
} // namespace HEJ

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