[#bsl-unordered_map-02b-begin-0a]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_map-02b.adoc[unordered_map]::begin
:relfileprefix: ../../
:mrdocs:

`begin` overloads

== Synopses

Declared in `<bslstl_unorderedmap.h>`

Return an iterator providing modifiable access to the first `value_type` object in the sequence of `value_type` objects maintained by this unordered map, or the `end` iterator if this unordered map is empty.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unordered_map-02b/iterator.adoc[iterator]
xref:bsl/unordered_map-02b/begin-06.adoc[begin]() noexcept;
----

[.small]#xref:bsl/unordered_map-02b/begin-06.adoc[_» more..._]#

Return an iterator providing non‐modifiable access to the first `value_type` object in the sequence of `value_type` objects maintained by this unordered map, or the `end` iterator if this unordered map is empty.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unordered_map-02b/const_iterator.adoc[const_iterator]
xref:bsl/unordered_map-02b/begin-01.adoc[begin]() const noexcept;
----

[.small]#xref:bsl/unordered_map-02b/begin-01.adoc[_» more..._]#

Return a local iterator providing modifiable access to the first `value_type` object in the sequence of `value_type` objects of the bucket having the specified `index` in the array of buckets maintained by this unordered map, or the `end(index)` iterator if the bucket is empty. The behavior is undefined unless 'index < bucket_count()'.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unordered_map-02b/local_iterator.adoc[local_iterator]
xref:bsl/unordered_map-02b/begin-0b.adoc[begin](xref:bsl/unordered_map-02b/size_type.adoc[size_type] index);
----

[.small]#xref:bsl/unordered_map-02b/begin-0b.adoc[_» more..._]#

Return a local iterator providing non‐modifiable access to the first `value_type` object in the sequence of `value_type` objects of the bucket having the specified `index` in the array of buckets maintained by this unordered map, or the `end(index)` iterator if the bucket is empty. The behavior is undefined unless `index < bucket_count()`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unordered_map-02b/const_local_iterator.adoc[const_local_iterator]
xref:bsl/unordered_map-02b/begin-03.adoc[begin](xref:bsl/unordered_map-02b/size_type.adoc[size_type] index) const;
----

[.small]#xref:bsl/unordered_map-02b/begin-03.adoc[_» more..._]#


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