24 Strings library [strings]

24.3 String classes [string.classes]

24.3.2 Class template basic_­string [basic.string]

24.3.2.7 basic_­string string operations [string.ops]

24.3.2.7.4 basic_­string​::​find_­first_­of [string.find.first.of]

size_type find_first_of(basic_string_view<charT, traits> sv, size_type pos = 0) const noexcept;

1
#

Effects: Determines the lowest position xpos, if possible, such that both of the following conditions hold:

  • (1.1)

    pos <= xpos and xpos < size();

  • (1.2)

    traits​::​eq(at(xpos), sv.at(I)) for some element I of the data referenced by sv.

2
#

Returns: xpos if the function can determine such a value for xpos. Otherwise, returns npos.

size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept;

3
#

Effects: Equivalent to: return find_­first_­of(basic_­string_­view<charT, traits>(str), pos);

size_type find_first_of(const charT* s, size_type pos, size_type n) const;

4
#

Returns: find_­first_­of(basic_­string_­view<charT, traits>(s, n), pos).

size_type find_first_of(const charT* s, size_type pos = 0) const;

5
#

Requires: s points to an array of at least traits​::​length(s) + 1 elements of charT.

6
#

Returns: find_­first_­of(basic_­string_­view<charT, traits>(s), pos).

size_type find_first_of(charT c, size_type pos = 0) const;

7
#

Returns: find_­first_­of(basic_­string(1, c), pos).