std::basic_string_view<CharT,Traits>::max_size

 

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Strings library

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Classes

basic_string

basic_string_view (C++17)

char_traits

 

std::basic_string_view

Member functions basic_string_view::basic_string_view    basic_string_view::operator= Iterators basic_string_view::beginbasic_string_view::cbegin basic_string_view::endbasic_string_view::cend basic_string_view::rbeginbasic_string_view::crbegin basic_string_view::rendbasic_string_view::crend Element access basic_string_view::at basic_string_view::operator[] basic_string_view::front basic_string_view::back basic_string_view::data Capacity basic_string_view::sizebasic_string_view::length basic_string_view::max_size basic_string_view::empty Modifiers basic_string_view::remove_prefix basic_string_view::remove_suffix basic_string_view::swap

Operations basic_string_view::copy basic_string_view::substr basic_string_view::compare basic_string_view::starts_with (C++20) basic_string_view::ends_with (C++20) basic_string_view::contains (C++23) basic_string_view::find basic_string_view::rfind basic_string_view::find_first_of basic_string_view::find_last_of basic_string_view::find_first_not_of basic_string_view::find_last_not_of Constants basic_string_view::npos Non-member functions operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20) operator<< operator""sv Helper classes hash<std::string_view>hash<std::wstring_view>hash<std::u8string_view>hash<std::u16string_view>hash<std::u32string_view> (C++20) Deduction guides(C++20)

 

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

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