[#BloombergLP-bdlc-FlatHashMap-at-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashMap.adoc[FlatHashMap]::at
:relfileprefix: ../../../
:mrdocs:

`at` overloads

== Synopses

Declared in `<bdlc_flathashmap.h>`

Return a modifiable reference to the mapped value for `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
VALUE&
xref:BloombergLP/bdlc/FlatHashMap/at-070.adoc[at](KEY const& key);
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/at-070.adoc[_» more..._]#

Return a const reference to the mapped value for `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
VALUE const&
xref:BloombergLP/bdlc/FlatHashMap/at-0b.adoc[at](KEY const& key) const;
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/at-0b.adoc[_» more..._]#

Return a modifiable reference to the mapped value for `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
VALUE&
xref:BloombergLP/bdlc/FlatHashMap/at-0f.adoc[at](LOOKUP_KEY const& key)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/at-0f.adoc[_» more..._]#

Return a const reference to the mapped value for `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
VALUE const&
xref:BloombergLP/bdlc/FlatHashMap/at-076.adoc[at](LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/at-076.adoc[_» more..._]#

== Return Value

* modifiable reference to the mapped value for `key`
* const reference to the mapped value for `key`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key whose mapped value is accessed
|===


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