[#bsl-Pair_ConstructionParametersPackLength]
= xref:bsl.adoc[bsl]::Pair_ConstructionParametersPackLength
:relfileprefix: ../
:mrdocs:

This component‐private component‐private meta‐function determines the number of elements in a tuple containing parameters for piecewise construction of a `bsl::pair` member having the specified `TYPE`. Result value depends on the `TYPE`, whether it takes a `bslma::Allocator*` constructor argument and, if so, whether that argument follows an argument of type `bsl::allocator_arg_t`.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class TYPE,
    class... ARGS>
struct Pair_ConstructionParametersPackLength
    : xref:bsl/integral_constant-02.adoc[integral_constant<int, sizeof...(ARGS) + Pair_BslmaIdiom<TYPE>::value>]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/integral_constant-02.adoc[integral_constant<int, sizeof...(ARGS) + Pair_BslmaIdiom<TYPE>::value>]`
| Metafunction representing a compile‐time constant of the specified (template parameter) `t_TYPE` with the specified (template parameter) `t_VALUE`.
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/type.adoc[`type`] 
| Alias for this `integral_constant` specialization.
| xref:bsl/integral_constant-02/value_type.adoc[`value_type`] 
| 
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/operator_call.adoc[`operator()`] 
| Return a copy of the template argument `t_VALUE`.
| xref:bsl/integral_constant-02/2conversion.adoc[`operator value_type`] 
| 
|===


== Static Data Members

[cols="1"]
|===
| Name
| xref:bsl/integral_constant-02/value.adoc[`value`] 
|===



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