optional_parameter_types.cxx

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/*
 * Project: RooFit
 * Authors:
 *   PB, Patrick Bos, Netherlands eScience Center, p.bos@esciencecenter.nl
 *
 * Copyright (c) 2021, CERN
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted according to the terms
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)
 */
 
#include <RooFit/TestStatistics/optional_parameter_types.h>
 
namespace RooFit {
namespace TestStatistics {
 
ConstrainedParameters::ConstrainedParameters(const RooArgSet &parameters) : set(parameters) {}
// N.B.: the default constructor must be _user-provided_ defaulted, otherwise aggregate initialization will be possible,
// which bypasses the explicit constructor and even leads to errors in some compilers; when initializing as
//   ConstrainedParameters({someRooArgSet})
// compilers can respond with
//   call of overloaded ‘GlobalObservables(<brace-enclosed initializer list>)’ is ambiguous
// This problem is well documented in http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1008r0.pdf. The solution
// used here is detailed in section 1.4 of that paper. Note that in C++17, the workaround is no longer necessary and
// the constructor can be _user-declared_ default (i.e. directly in the declaration above).
ConstrainedParameters::ConstrainedParameters() = default;
 
ExternalConstraints::ExternalConstraints(const RooArgSet &constraints) : set(constraints) {}
ExternalConstraints::ExternalConstraints() = default;
 
GlobalObservables::GlobalObservables(const RooArgSet &observables) : set(observables) {}
GlobalObservables::GlobalObservables() = default;
 
}
}