[#bsl-basic_string-0faf-find_last_of-07]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0faf.adoc[basic_string]::find_last_of
:relfileprefix: ../../
:mrdocs:

Find the last character belonging to the specified set.

== Synopsis

Declared in `<bslstl_string.h>`

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

== Description

Return the position of the _last_ occurrence of a character belonging to the specified `characterString` of the optionally specified `numChars` length, if such an occurrence can be found in this string (on or _before_ 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.

== Return Value

position of the last matching character, or `npos`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *characterString*
| pointer to characters
| *position*
| starting index
| *numChars*
| number of characters
|===


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