NAME

std::basic_string_view::max_size - std::basic_string_view::max_size

Synopsis

constexpr size_type max_size() const noexcept; (since C++17)

The largest possible number of char-like objects that can be referred to by a
basic_string_view.

Parameters

(none)

Return value

Maximum number of characters.

Complexity

Constant.

Example

// Run this code

#include <iostream>
#include <limits>
#include <string_view>

int main() {
std::cout
<< std::numeric_limits<std::int64_t>::max()
<< " <- numeric_limits<int64_t>::max()\n"
<< std::string_view{}.max_size()
<< " <- std::string_view::max_size()\n"
<< std::basic_string_view<char>{}.max_size()
<< " <- std::basic_string_view<char>::max_size()\n"
<< std::basic_string_view<char16_t>{}.max_size()
<< " <- std::basic_string_view<char16_t>::max_size()\n"
<< std::wstring_view{}.max_size()
<< " <- std::wstring_view::max_size()\n"
<< std::basic_string_view<char32_t>{}.max_size()
<< " <- std::basic_string_view<char32_t>::max_size()\n"
;
}

Possible output:

9223372036854775807 <- numeric_limits<int64_t>::max()
4611686018427387899 <- std::string_view::max_size()
4611686018427387899 <- std::basic_string_view<char>::max_size()
2305843009213693949 <- std::basic_string_view<char16_t>::max_size()
1152921504606846974 <- std::wstring_view::max_size()
1152921504606846974 <- std::basic_string_view<char32_t>::max_size()

See also

size returns the number of characters
length (public member function)
(C++17)
empty checks whether the view is empty
(C++17) (public member function)
max_size returns the maximum number of characters
(public member function of std::basic_string<CharT,Traits,Allocator>)