BloombergLP::bdlb::TransformIterator_Traits

Synopsis

Declared in <bdlb_transformiterator.h>

template<
    class FUNCTOR,
    class ITERATOR>
struct TransformIterator_Traits;

Name	Description
`BaseIteratorTraits`	Define the iterator traits class of the underlying iterator.
`ResultType`	Define the result type returned by the functor. This is not necessarily the same type as the dereference of the iterator. In C++11, the result type can be determined automatically. Note that various iterations of the language standard might want to instead use `std::result_of` or `std::invoke_result` (which have been variously added and then deprecated), but the following works from C++11 onwards.
`difference_type`	Type used to represent distances between iterators.
`iterator_category`	Define the iterator category of the transform iterator. If the functor returns a reference type, we pass through the iterator category of the underlying iterator, otherwise we use the input iterator tag (because all the other tags require that dereferencing produces a reference).
`pointer`
`reference`	Define the remaining standard types of the transform iterator.
`value_type`	Value type produced by applying the functor to a dereferenced underlying iterator.

Name	Description
`TransformIterator_Traits<RESULT(*)(ARGUMENT), ITERATOR>`	Specialize the transform iterator traits template for functors that are function or function pointer types. It is sufficient to inherit from the version of the traits class that corresponds to a `bsl::function` of the function type parameter.
`TransformIterator_Traits<RESULT(ARGUMENT), ITERATOR>`

Name	Description
`TransformIterator_Traits<RESULT(ARGUMENT), ITERATOR>`
`TransformIterator_Traits<RESULT(*)(ARGUMENT), ITERATOR>`	Specialize the transform iterator traits template for functors that are function or function pointer types. It is sufficient to inherit from the version of the traits class that corresponds to a `bsl::function` of the function type parameter.