[#bsl-basic_string-01d-assign-090]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-01d.adoc[basic_string<char8_t>]::assign
:relfileprefix: ../../
:mrdocs:

Assign to this string the value of the optionally specified `numChars` characters starting at the specified `position` in the specified `replacement` string, or the suffix of `replacement` starting at `position` if `position + numChars > replacement.length()`. If `numChars` is not specified, `npos` is used. Return a reference providing modifiable access to this string. Throw `out_of_range` if `position > replacement.length()`.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0faf.adoc[basic_string<char8_t>]&
assign(
    xref:bsl/basic_string-0faf.adoc[basic_string<char8_t>] const& replacement,
    xref:bsl/basic_string-01d/size_type.adoc[size_type] position,
    xref:bsl/basic_string-01d/size_type.adoc[size_type] numChars = npos);
----


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