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 <cstdint>
#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()
<< " <- string_view::max_size()\n"
<< std::basic_string_view<char>{}.max_size()
<< " <- basic_string_view<char>::max_size()\n"
<< std::basic_string_view<char16_t>{}.max_size()
<< " <- basic_string_view<char16_t>::max_size()\n"
<< std::wstring_view{}.max_size()
<< " <- wstring_view::max_size()\n"
<< std::basic_string_view<char32_t>{}.max_size()
<< " <- basic_string_view<char32_t>::max_size()\n";
}

Possible output:¶

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

See also¶

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