[#BloombergLP-bdlf-Bind_Evaluator-0b]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlf.adoc[bdlf]::Bind_Evaluator
:relfileprefix: ../../
:mrdocs:

Component‐private utility for evaluating a bound function call.

== Synopsis

Declared in `<bdlf_bind.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class BINDER,
    class t_ARG_TUPLE>
struct Bind_Evaluator;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlf/Bind_Evaluator-0b/BoundType.adoc[`BoundType`] 
| Forwarding reference type for the bound tuple element.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlf/Bind_Evaluator-0b/eval.adoc[`eval`] 
| Return the specified `value`.
|===


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlf/Bind_Evaluator-01.adoc[`Bind_Evaluator<PlaceHolder<t_INDEX>, t_ARG_TUPLE>`] 
| This partial specialization of `Bind_Evaluator` provides an argument evaluator that substitutes the place‐holder at position `t_INDEX` with the corresponding element in the specified `t_ARG_TUPLE`.
| xref:BloombergLP/bdlf/Bind_Evaluator-05.adoc[`Bind_Evaluator<Bind<t_RET, t_FUNC, t_BOUND_TUPLE>, t_ARG_TUPLE>`] 
| This utility provides an evaluator for nested `Bind` arguments. The `Bind` function object is invoked using the provided argument list and the result is returned.
| xref:BloombergLP/bdlf/Bind_Evaluator-0a.adoc[`Bind_Evaluator<BindWrapper<t_RET, t_FUNC, t_BOUND_TUPLE>, t_ARG_TUPLE>`] 
| This utility provides an evaluator for nested `BindWrapper` arguments. It is a specialization of the `Bind_Evaluator` declared in the `bdlf_bind` component to enable nested `BindWrapper` objects in the same fashion as nested `Bind` objects. The underlying `Bind` function object is invoked using the provided argument list and the result is returned.
|===



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