Find the last occurrence of a character not within the string.

template<
    typename T,
    [role red error.class-detail-template.1][role red error.class-detail-template.2] = detail::enable_if_viewable_t<T, CharT, Traits>>
BOOST_STATIC_STRING_CPP14_CONSTEXPR size_type
find_last_not_of(
    const T& t,
    size_type pos = npos) const;
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template<
    size_t M>
BOOST_STATIC_STRING_CPP14_CONSTEXPR size_type
find_last_not_of(
    const basic_static_string< M, CharT, Traits >& str,
    size_type pos = npos) const;
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BOOST_STATIC_STRING_CPP14_CONSTEXPR size_type
find_last_not_of(
    const_pointer s,
    size_type pos,
    size_type n) const;
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BOOST_STATIC_STRING_CPP14_CONSTEXPR size_type
find_last_not_of(
    const_pointer s,
    size_type pos = npos) const;
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Find the last occurrence of a character not equal to c.

BOOST_STATIC_STRING_CPP14_CONSTEXPR size_type
find_last_not_of(
    value_type c,
    size_type pos = npos) const;
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