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## Struct template is_reducible

boost::histogram::axis::traits::is_reducible — Meta-function to detect whether an axis is reducible.

## Synopsis

    // In header: <boost/histogram/axis/traits.hpp>

    template<typename Axis>
    struct is_reducible {
    };

## Description

Doxygen does not render this well. This is a meta-function (template alias), it accepts an axis type and represents compile-time boolean which is true or false, depending on whether the axis can be reduced with boost::histogram::algorithm::reduce().

An axis can be made reducible by adding a special constructor, see Axis concept for details.

### Template Parameters

1.     typename Axis

   axis type.