[#bsl-unordered_multimap-08f]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_multimap-0b0.adoc[unordered_multimap<KEY, VALUE, HASH>]
:relfileprefix: ../
:mrdocs:

Deduce the template parameters `KEY` and `VALUE` from the `value_type` of the iterators supplied to the constructor of `unordered_multimap`. Deduce the template parameter `HASH` from the other parameters passed to the constructor of `unordered_multimap`. This deduction guide does not participate unless the supplied allocator is convertible to `bsl::allocator<bsl::pair<const KEY, VALUE>>`.

== Synopsis

Declared in `<bslstl_unorderedmultimap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class INPUT_ITERATOR,
    class HASH,
    class ALLOC,
    class KEY = xref:BloombergLP/bslstl/IteratorUtil/IterKey_t.adoc[BloombergLP::bslstl::IteratorUtil::IterKey_t<INPUT_ITERATOR>],
    class VALUE = xref:BloombergLP/bslstl/IteratorUtil/IterMapped_t.adoc[BloombergLP::bslstl::IteratorUtil::IterMapped_t<INPUT_ITERATOR>],
    class DEFAULT_ALLOCATOR = xref:bsl/allocator-0df.adoc[bsl::allocator<bsl::pair<KEY const, VALUE>>]>
requires bsl::is_convertible_v<ALLOC *, DEFAULT_ALLOCATOR>
xref:bsl/unordered_multimap-0b0.adoc[unordered_multimap<KEY, VALUE, HASH>](
    INPUT_ITERATOR,
    INPUT_ITERATOR,
    bsl::allocator_traits<DEFAULT_ALLOCATOR>::size_type,
    HASH,
    ALLOC*) -> xref:bsl/unordered_multimap-0b0.adoc[unordered_multimap<KEY, VALUE, HASH>];
----


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