[#bsl-basic_string-0f3-find_first_not_of-03]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0f3.adoc[basic_string<char32_t>]::find_first_not_of
:relfileprefix: ../../
:mrdocs:

Return the position of the _first_ occurrence of a character _not_ belonging to the specified `characterString` of the optionally specified `numChars` length, if such an occurrence can be found in this string (on or _after_ the optionally specified `position` if such a `position` is specified), and return `npos` otherwise. If `numChars` is not specified, `CHAR_TRAITS::length(characterString)` is used.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0f3/size_type.adoc[size_type]
find_first_not_of(
    char32_t const* characterString,
    xref:bsl/basic_string-0f3/size_type.adoc[size_type] position,
    xref:bsl/basic_string-0f3/size_type.adoc[size_type] numChars) const;
----


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