[#bsl-basic_string-07a]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0faf.adoc[basic_string<CHAR_TYPE, char_traits<CHAR_TYPE>, ALLOCATOR>]
:relfileprefix: ../
:mrdocs:

Deduce the template parameter `CHAR_TYPE` from the `value_type` of the iterators passed to passed to the constructor of `basic_string`. Deduce the template parameter `ALLOCATOR` from the optional argument passed to the constructor. This deduction guide does not participate unless the specified `ALLOCATOR` meets the requirements of a standard allocator.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class INPUT_ITER,
    class CHAR_TYPE = xref:BloombergLP/bslstl/IteratorUtil/IterVal_t.adoc[BloombergLP::bslstl::IteratorUtil::IterVal_t<INPUT_ITER>],
    class ALLOCATOR = xref:bsl/allocator-0df.adoc[bsl::allocator<CHAR_TYPE>]>
requires bsl::IsStdAllocator_v<ALLOCATOR>
xref:bsl/basic_string-0faf.adoc[basic_string<CHAR_TYPE, char_traits<CHAR_TYPE>, ALLOCATOR>](
    INPUT_ITER,
    INPUT_ITER,
    ALLOCATOR) -> xref:bsl/basic_string-0faf.adoc[basic_string<CHAR_TYPE, char_traits<CHAR_TYPE>, ALLOCATOR>];
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#