[#BloombergLP-bdlc-FlatHashMap-2constructor-0c]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashMap.adoc[FlatHashMap]::FlatHashMap
:relfileprefix: ../../../
:mrdocs:

Create an empty map with the specified `capacity`, `hash`, and `equal`.

== Synopsis

Declared in `<bdlc_flathashmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
FlatHashMap(
    std::size_t capacity,
    HASH const& hash,
    EQUAL const& equal,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *capacity*
| minimum initial capacity of the underlying array
| *hash*
| hash functor used for keys
| *equal*
| key‐equality predicate
| *basicAllocator*
| allocator used to supply memory
|===


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