std::basic_string::find_first_of

 

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std::basic_string

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basic_string::basic_string

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basic_string::begin basic_string::cbegin (C++11)

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Search

basic_string::find

basic_string::rfind

basic_string::find_first_of

basic_string::find_first_not_of

basic_string::find_last_of

basic_string::find_last_not_of

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basic_string::npos

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to_wstring (C++11)

Helper classes

hash<std::string> hash<std::wstring> hash<std::u32string> hash<std::u16string> (C++11)

 

size_type find_first_of( const basic_string& str, size_type pos = 0 ) const;	(1)
size_type find_first_of( const CharT* s, size_type pos, size_type count ) const;	(2)
size_type find_first_of( const CharT* s, size_type pos = 0 ) const;	(3)
size_type find_first_of( CharT ch, size_type pos = 0 ) const;	(4)

Finds the first character equal to one of characters in the given character sequence. Search begins at pos, i.e. the found character must not be in position preceding pos.

1) Finds the first character equal to one of characters in str.

2) Finds the first character equal to one of characters in the first count characters of the character string pointed to by s. s can include null characters.

3) Finds the first character equal to one of characters in character string pointed to by s. The length of the string is determined by the first null character.

4) Finds the first character equal to ch.

Parameters

str	-	string identifying characters to search for
pos	-	position at which to begin searching
count	-	length of character string identifying characters to search for
s	-	pointer to a character string identifying characters to search for
ch	-	character to search for

Return value

position of the found character or npos if no such character is found.

Exceptions

1,4)

noexcept specification:  

noexcept

  (since C++11)

Notes

traits::eq() is used to perform the comparison.

See also

find	find characters in the string (public member function)
rfind	find the last occurrence of a substring (public member function)
find_first_not_of	find first absence of characters (public member function)
find_last_of	find last occurrence of characters (public member function)
find_last_not_of	find last absence of characters (public member function)