[#absl-AnySpan-2constructor-03]
= xref:absl.adoc[absl]::xref:absl/AnySpan.adoc[AnySpan]::AnySpan
:relfileprefix: ../../
:mrdocs:

Constructs a span wrapping a const array, applying a transform (by copy).

== Synopsis

Declared in `<absl/types/any_span.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename Element,
    typename Transform,
    typename = xref:absl/AnySpan.adoc[EnableIfTransformIsValid<Transform, Element const&>],
    xref:absl/AnySpan.adoc[EnableIfTransformIsByCopy<Transform>] = true>
constexpr
AnySpan(
    Element const* ptr,
    xref:absl/AnySpan/size_type.adoc[size_type] size,
    Transform const& transform);
----

== Description

The transform must be a function object whose const `operator()` takes an `Element` and returns a reference to `T` or a compatible object. Both the transform and array must outlive this span.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ptr*
| Pointer to the first element.
| *size*
| Number of elements.
| *transform*
| Functor applied to each element on access.
|===


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