in include/aws/crt/StringView.h [348:363]
size_type find_first_of(const CharT *s, size_type pos, size_type n) const noexcept
{
if (pos >= m_size || !n || !s)
{
return npos;
}
const CharT *r = _s_find_first_of_ce(m_data + pos, m_data + m_size, s, s + n);
if (r == m_data + m_size)
{
return npos;
}
return static_cast<size_type>(r - m_data);
}