string::find_last_of

## `string::find_last_of`

Find the last character present in the specified string.

### Synopsis

    std::size_t
    find_last_of(
        string_view sv,
        std::size_t pos = string::npos) const noexcept;

### Description

Search from `pos` backwards for the first character in this string that is equal to any of the characters of `sv`. If `pos` is equal to `npos` (the default), search from the last character.

### Complexity

Linear in `size()` `+ sv.size()`.

### Exception Safety

No-throw guarantee.

### Return Value

The index of the found character, or `npos` if none exists.

### Parameters

Name | Description
--- | ---
`sv` | The characters to search for.
`pos` | The index to start searching at.

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