std::basic_string_view<CharT,Traits>::find_first_not_of
From cppreference.com
< cpp | string | basic string view
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constexpr size_type
find_first_not_of( basic_string_view v, size_type pos = 0 ) const noexcept ; |
(1) | (since C++17) |
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constexpr size_type
find_first_not_of( CharT ch, size_type pos = 0 ) const noexcept ; |
(2) | (since C++17) |
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constexpr size_type
find_first_not_of( const CharT* s, size_type pos, size_type count ) const ; |
(3) | (since C++17) |
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constexpr size_type
find_first_not_of( const CharT* s, size_type pos = 0 ) const ; |
(4) | (since C++17) |
Finds the first character not equal to any of the characters in the given character sequence.
1) Finds the first character not equal to any of the characters of v in this view, starting at position pos
2) Equivalent to
find_first_not_of(basic_string_view(
std::addressof
(ch), 1
), pos)
3) Equivalent to find_first_not_of(basic_string_view(s, count), pos)
4) Equivalent to find_first_not_of(basic_string_view(s), pos)
Parameters
| v | - | view to search for |
| pos | - | position at which to start the search |
| count | - | length of the string of characters to compare |
| s | - | pointer to a string of characters to compare |
| ch | - | character to compare |
Return value
Position of the first character not equal to any of the characters in the given string, or std::string_view::npos if no such character is found.
Complexity
Example
Run this code
#include <string_view> using namespace std::literals; int main() { static_assert(2 == "BCDEF"sv.find_first_not_of("ABC")); // ^ static_assert(4 == "BCDEF"sv.find_first_not_of("ABC", 4)); // ^ static_assert(1 == "BCDEF"sv.find_first_not_of('B')); // ^ static_assert(3 == "BCDEF"sv.find_first_not_of('D', 2)); // ^ }
See also
| find characters in the view (public member function) |
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| find the last occurrence of a substring (public member function) |
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| find first occurrence of characters (public member function) |
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| find last occurrence of characters (public member function) |
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| find last absence of characters (public member function) |
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| find first absence of characters (public member function of std::basic_string<CharT,Traits,Allocator>) |