[#BloombergLP-bdlb-TransparentLess]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::TransparentLess
:relfileprefix: ../../
:mrdocs:

Transparent less&hyphen;than functor for heterogeneous comparison&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;transparentless&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct TransparentLess;
----

== Description

This `struct` defines an ordering on objects of different types, enabling them for use for heterogeneous comparison in the standard associative containers such as `bsl&colon;&colon;map` and `bsl&colon;&colon;set`&period; Note that this class is an empty POD type&period;

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlb/TransparentLess/is_transparent.adoc[`is&lowbar;transparent`] 
| Type alias indicating this is a transparent comparator&period;
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlb/TransparentLess/operator_call.adoc[`operator()`] 
| Return `true` if the specified `lhs` is less than the specified `rhs` and `false` otherwise&period;
|===



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