[#bsl-basic_string-0fb-operator_plus_eq-0c]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0fb.adoc[basic_string<char>]::operator+=
:relfileprefix: ../../
:mrdocs:

Append the specified null‐terminated `rhs` string (of length `CHAR_TRAITS::length(rhs)`) to this string, and return a reference providing modifiable access to this string.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0faf.adoc[basic_string<char>]&
operator+=(char const* rhs);
----


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