sig::Optional_last_value< T > Class Template Reference

A functor class that returns the last value in an iterator range. More...

#include <optional_last_value.hpp>

Public Types
using	Result_type = std::optional< T >
	Type of object the iterator range points to.

Public Member Functions
template<typename InputIterator >
auto	operator() (InputIterator first, InputIterator last) const -> Result_type

Detailed Description

template<typename T>
class sig::Optional_last_value< T >

A functor class that returns the last value in an iterator range.

Attempts to dereference every iterator in the range [first, last). If the iterator range is empty, an empty opt::Optional object is returned, otherwise an opt::Optional wrapping the last value is returned.

Member Function Documentation

operator()()

template<typename T >

template<typename InputIterator >

auto sig::Optional_last_value< T >::operator() ( InputIterator  first, InputIterator  last  ) const -> Result_type

inline

Parameters

first	Input iterator to the first element in the range.
last	Input iterator to one past the last element in the range.

Returns

The value stored in the last iterator of the range, wrapped in an opt::Optional.

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The documentation for this class was generated from the following file:

• optional_last_value.hpp