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

This wrapper class provides a binder with shared pointer semantics to a non‐modifiable binder (both `operator*` and `operator‐>` accessors) and forward 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, in order to meet user expectations that the result of `BindUtil::bind` be an invocable just as the result of `bdlf::BindUtil::bind` is; in that case, the invocation parameters are simply forwarded to the shared binder. Note finally that even though this wrapper has pointer semantics for the `operator*` and `operator‐>`, it has value semantics for the invocation: invoking a non‐modifiable wrapper will forward the invocation to the non‐modifiable binder shared by that wrapper, even though pointer semantics have it .

== 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;
----

== 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 object using the invocation parameters provided at construction of this `bdlf::Bind` object, substituting place‐holders for their respective values in the specified `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>`] 
| `BindWrapper` has pointer semantics.
| xref:BloombergLP/bdlf/BindWrapper/2conversion-0c.adoc[`operator BloombergLP::bslmf::NestedTraitDeclaration<BindWrapper, IsBitwiseMoveable>`] 
| `BindWrapper` is bitwise moveable.
| xref:BloombergLP/bdlf/BindWrapper/2conversion-07d.adoc[`operator BloombergLP::bslmf::NestedTraitDeclaration<BindWrapper, is_nothrow_move_constructible>`] 
| `BindWrapper` is bitwise moveable.
|===



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