[#BloombergLP-bslstl-MapComparator-operator_call-00f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/MapComparator.adoc[MapComparator]::operator()
:relfileprefix: ../../../
:mrdocs:

Function call operators

== Synopses

Declared in `<bslstl_mapcomparator.h>`

Return whether `lhs` is ordered before the key stored in `rhs`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
bool
xref:BloombergLP/bslstl/MapComparator/operator_call-007.adoc[operator()](
    LOOKUP_KEY const& lhs,
    xref:BloombergLP/bslalg/RbTreeNode.adoc[bslalg::RbTreeNode] const& rhs);
----

[.small]#xref:BloombergLP/bslstl/MapComparator/operator_call-007.adoc[_» more..._]#

Return whether `lhs` is ordered before the key stored in `rhs`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
bool
xref:BloombergLP/bslstl/MapComparator/operator_call-0829.adoc[operator()](
    LOOKUP_KEY const& lhs,
    xref:BloombergLP/bslalg/RbTreeNode.adoc[bslalg::RbTreeNode] const& rhs) const;
----

[.small]#xref:BloombergLP/bslstl/MapComparator/operator_call-0829.adoc[_» more..._]#

Return whether the key stored in `lhs` is ordered before `rhs`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
bool
xref:BloombergLP/bslstl/MapComparator/operator_call-082d.adoc[operator()](
    xref:BloombergLP/bslalg/RbTreeNode.adoc[bslalg::RbTreeNode] const& lhs,
    LOOKUP_KEY const& rhs);
----

[.small]#xref:BloombergLP/bslstl/MapComparator/operator_call-082d.adoc[_» more..._]#

Return whether the key stored in `lhs` is ordered before `rhs`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
bool
xref:BloombergLP/bslstl/MapComparator/operator_call-03.adoc[operator()](
    xref:BloombergLP/bslalg/RbTreeNode.adoc[bslalg::RbTreeNode] const& lhs,
    LOOKUP_KEY const& rhs) const;
----

[.small]#xref:BloombergLP/bslstl/MapComparator/operator_call-03.adoc[_» more..._]#

== Return Value

* `true` if `lhs` is ordered before the key in `rhs`, and `false` otherwise
* `true` if the key in `lhs` is ordered before `rhs`, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lhs*
| lookup key compared against the node's key
| *rhs*
| tree node whose key is compared to `lhs`
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#