std::string_view find_last_not_of() method
- od C++17
// (1) Const version only
constexpr size_type find_last_not_of( const basic_string& str, size_type pos = 0 ) const noexcept;
// (2) Const version only
constexpr size_type find_last_not_of( const CharT* s, size_type pos, size_type count ) const;
// (3) Const version only
constexpr size_type find_last_not_of( const CharT* s, size_type pos = 0 ) const;
// (4) Const version only
constexpr size_type find_last_not_of( CharT ch, size_type pos = 0 ) const noexcept;
Finds the last character not equal to any of the characters in the given character sequence.
The search considers only the interval [ 0, pos ].
- (1) Finds the last character not equal to any of the characters of
v
in this view, starting at positionpos
. - (2) Equivalent to
find_last_not_of(basic_string_view(std::addressof(c), 1), pos)
. - (3) Equivalent to
find_last_not_of(basic_string_view(s, count), pos)
. - (4) Equivalent to
find_last_not_of(basic_string_view(s), pos)
.
Parameters
v
- view to search forpos
- position at which to start the searchcount
- length of the string of characters to compares
- pointer to a string of characters to comparech
- character to compare
Return value
Position of the last occurrence of any character of the substring, or npos
if no such substring is found.
Complexity
O(size() * v.size()) at worst.
important
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Exceptions
(none)
Example
#include <string_view>
using std::operator""sv;
int main()
{
static_assert(1 == "BCDEF"sv.find_last_not_of("DEF"));
// ^
static_assert(2 == "BCDEFG"sv.find_last_not_of("EFG", 3));
// ^
static_assert(2 == "ABBA"sv.find_last_not_of('A'));
// ^
static_assert(1 == "ABBA"sv.find_last_not_of('A', 1));
// ^
}
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