[#bsl-unordered_map-0c]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_map-02b.adoc[unordered_map<KEY, VALUE>]
:relfileprefix: ../
:mrdocs:

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

== Synopsis

Declared in `<bslstl_unorderedmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class KEY,
    class VALUE,
    class ALLOC,
    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_map-02b.adoc[unordered_map<KEY, VALUE>](
    std::initializer_list<bsl::pair<KEY const, VALUE>>,
    bsl::allocator_traits<DEFAULT_ALLOCATOR>::size_type,
    ALLOC*) -> xref:bsl/unordered_map-02b.adoc[unordered_map<KEY, VALUE>];
----


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