[#bsl-basic_string-0e-find_first_not_of-01]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0e.adoc[basic_string<wchar_t>]::find_first_not_of
:relfileprefix: ../../
:mrdocs:

Return the position of the first character in this string that is not found in the specified `characterString`, or `npos` if not found.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0e/size_type.adoc[size_type]
find_first_not_of(
    wchar_t const* characterString,
    xref:bsl/basic_string-0e/size_type.adoc[size_type] position = 0) const;
----


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