count_tpl.h

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/****************************************************************************
 *   This file is part of the aGrUM/pyAgrum library.                        *
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 *   Copyright (c) 2005-2026 by                                             *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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 *   SPDX-FileCopyrightText: Copyright 2005-2026                            *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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 *   homepage : http://agrum.gitlab.io                                      *
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#pragma once
 

 
#include <agrum/base/multidim/aggregators/count.h>
 
namespace gum {
 
  namespace aggregator {
    template < GUM_Numeric GUM_SCALAR >
    Count< GUM_SCALAR >::Count(Idx value) : MultiDimAggregator< GUM_SCALAR >(), _value_(value) {
      GUM_CONSTRUCTOR(Count);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    Count< GUM_SCALAR >::Count(const Count< GUM_SCALAR >& from) :
        MultiDimAggregator< GUM_SCALAR >(from) {
      _value_ = from._value_;
      GUM_CONS_CPY(Count);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    Count< GUM_SCALAR >::~Count() {
      GUM_DESTRUCTOR(Count);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    Idx Count< GUM_SCALAR >::neutralElt_() const {
      return (Idx)0;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    Idx Count< GUM_SCALAR >::fold_(const DiscreteVariable& v,
                                   Idx                     i1,
                                   Idx                     i2,
                                   bool&                   stop_iteration) const {
      return (i1 == _value_) ? 1 + i2 : i2;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    std::string Count< GUM_SCALAR >::aggregatorName() const {
      return std::format("count[{}]", _value_);
    }
 
    template < GUM_Numeric GUM_SCALAR >
    std::optional< Idx > Count< GUM_SCALAR >::value() const {
      return _value_;
    }
 
    template < GUM_Numeric GUM_SCALAR >
    MultiDimContainer< GUM_SCALAR >* Count< GUM_SCALAR >::newFactory() const {
      return new Count< GUM_SCALAR >(_value_);
    }
 
  }   // namespace aggregator
}   // namespace gum