[#BloombergLP-bdlcc-Cache-2constructor-0a7]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlcc.adoc[bdlcc]::xref:BloombergLP/bdlcc/Cache.adoc[Cache]::Cache
:relfileprefix: ../../../
:mrdocs:

Constructors

== Synopses

Declared in `<bdlcc_cache.h>`

Create an empty LRU cache having no size limit. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
xref:BloombergLP/bdlcc/Cache/2constructor-0c.adoc[Cache](xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

[.small]#xref:BloombergLP/bdlcc/Cache/2constructor-0c.adoc[_» more..._]#

Create an empty cache using the specified `evictionPolicy` and the specified `lowWatermark` and `highWatermark`. Optionally specify the `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. The behavior is undefined unless `lowWatermark <= highWatermark`, `1 <= lowWatermark`, and `1 <= highWatermark`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlcc/Cache/2constructor-0ac.adoc[Cache](
    xref:BloombergLP/bdlcc/CacheEvictionPolicy/Enum.adoc[CacheEvictionPolicy::Enum] evictionPolicy,
    std::size_t lowWatermark,
    std::size_t highWatermark,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

[.small]#xref:BloombergLP/bdlcc/Cache/2constructor-0ac.adoc[_» more..._]#

Create an empty cache using the specified `evictionPolicy`, `lowWatermark`, and `highWatermark`. The specified `hashFunction` is used to generate the hash values for a given key, and the specified `equalFunction` is used to determine whether two keys have the same value. Optionally specify the `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. The behavior is undefined unless `lowWatermark <= highWatermark`, `1 <= lowWatermark`, and `1 <= highWatermark`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlcc/Cache/2constructor-01.adoc[Cache](
    xref:BloombergLP/bdlcc/CacheEvictionPolicy/Enum.adoc[CacheEvictionPolicy::Enum] evictionPolicy,
    std::size_t lowWatermark,
    std::size_t highWatermark,
    HASH const& hashFunction,
    EQUAL const& equalFunction,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

[.small]#xref:BloombergLP/bdlcc/Cache/2constructor-01.adoc[_» more..._]#


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