Return the position of the first 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 after 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.

Synopsis

Declared in <bslstl_string.h>

size_type
find_first_of(
    char8_t const* characterString,
    size_type position,
    size_type numChars) const;

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