[#BloombergLP-bslmf-IsTransparentPredicate-0f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::IsTransparentPredicate
:relfileprefix: ../../
:mrdocs:

This `struct` template implements a meta&hyphen;function to determine whether the (template parameter) `t&lowbar;COMPARATOR` is transparent (has a publicly accessible member that is a type named `is&lowbar;transparent`)&period; This generic default template derives from `bsl&colon;&colon;false&lowbar;type`&period; Template specializations are provided (below) that derive from `bsl&colon;&colon;true&lowbar;type`&period;

== Synopsis

Declared in `&lt;bslmf&lowbar;istransparentpredicate&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    class t&lowbar;COMPARATOR,
    class t&lowbar;KEY,
    class = void&gt;
struct IsTransparentPredicate
    : xref:bsl/false_type.adoc[bsl::false&lowbar;type]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/false_type.adoc[bsl::false&lowbar;type]`
| Metafunction representing the boolean constant `false`&period;
|===

== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/IsTransparentPredicate-0c.adoc[`IsTransparentPredicate&lt;t&lowbar;COMPARATOR, t&lowbar;KEY, bsl::void&lowbar;t&lt;t&lowbar;COMPARATOR::is&lowbar;transparent&gt;&gt;`] 
| This specialization of `IsTransparentPredicate`, for when the (template parameter) `t&lowbar;COMPARATOR` is transparent, derives from `bsl&colon;&colon;true&lowbar;type`&period;
|===



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