Boost C++ Libraries

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This is an older version of Boost and was released in 2018. The current version is 1.89.0.

Struct empty

Struct empty

boost::proto::functional::empty — A PolymorphicFunctionObject type that invokes the boost::empty() function on its arguments.

Synopsis

// In header: <boost/proto/functional/range/empty.hpp>


struct empty :  proto::callable {
  // types
  typedef bool result_type;

  // public member functions
  template<typename Range> bool operator()(Range const &) const;
};

Description

A PolymorphicFunctionObject type that invokes the boost::empty() function on its arguments.

`empty` public member functions

template<typename Range> bool operator()(Range const & rng) const;

Returns:

boost::empty(rng)