[#BloombergLP-bdlf-BindWrapper]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlf.adoc[bdlf]::BindWrapper
:relfileprefix: ../../
:mrdocs:

This wrapper provides shared‐pointer semantics around a binder.

== Synopsis

Declared in `<bdlf_bind.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_RET,
    class t_FUNC,
    class t_BOUND_TUPLE>
class BindWrapper;
----

== Description

This wrapper class provides a binder with shared pointer semantics to a non‐modifiable binder (both `operator*` and `operator‐>` accessors) and forwards its construction arguments to the underlying binder. Note that instances of this class should not be created explicitly; instead use the `BindUtil` factory methods. Note also that instances of this class can be invoked directly so the result of `BindUtil::bind` is invocable. Note finally that even though this wrapper has pointer semantics for `operator*` and `operator‐>`, it has value semantics for invocation.

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlf/BindWrapper/ResultType.adoc[`ResultType`] 
| The return type of this binder object.
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlf/BindWrapper/2constructor-08.adoc[`BindWrapper`]         [.small]#[constructor]#
| Constructors
| xref:BloombergLP/bdlf/BindWrapper/invoke.adoc[`invoke`] 
| Invoke the bound function with the evaluated arguments.
| xref:BloombergLP/bdlf/BindWrapper/operator_call-026.adoc[`operator()`] 
| Function call operators
| xref:BloombergLP/bdlf/BindWrapper/operator_star.adoc[`operator*`] 
| Return a reference to the non‐modifiable binder shared by this wrapper.
| xref:BloombergLP/bdlf/BindWrapper/operator_ptr.adoc[`operator‐>`] 
| Return the address of the non‐modifiable binder shared by this wrapper.
| xref:BloombergLP/bdlf/BindWrapper/2conversion-074.adoc[`operator BloombergLP::bslmf::NestedTraitDeclaration<BindWrapper, HasPointerSemantics>`] 
| Declare that this type has pointer semantics.
| xref:BloombergLP/bdlf/BindWrapper/2conversion-0c.adoc[`operator BloombergLP::bslmf::NestedTraitDeclaration<BindWrapper, IsBitwiseMoveable>`] 
| Declare that this type is bitwise moveable.
| xref:BloombergLP/bdlf/BindWrapper/2conversion-07d.adoc[`operator BloombergLP::bslmf::NestedTraitDeclaration<BindWrapper, is_nothrow_move_constructible>`] 
| Declare that this type is nothrow move constructible.
|===



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