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##### basic_static_string::rfind (3 of 5 overloads)

Find the last occurrence of a string within the string.

###### Synopsis

    constexpr basic_static_string::size_type
    rfind(
        basic_static_string::const_pointer s,
        basic_static_string::size_type pos,
        basic_static_string::size_type n) const noexcept;

###### Description

Finds the last occurrence of the string pointed to by `s` within the string starting before or at the index `pos`.

###### Complexity

Linear.

###### Return Value

The highest index `idx` less than or equal to `pos` where each element of `{s, s + n)` is equal to that of `{begin() + idx, begin() + idx + n)` if one exists, and `npos` otherwise.

###### Parameters

Name | Description
--- | ---
`s` | The string to search for.
`pos` | The index to start searching at.
`n` | The length of the string to search for.