std::streamsize
Defined in header <ios> | ||
|---|---|---|
typedef /*implementation-defined*/ streamsize; |
The type std::streamsize is a signed integral type used to represent the number of characters transferred in an I/O operation or the size of an I/O buffer. It is used as a signed counterpart of std::size_t, similar to the POSIX type ssize_t.
Notes
Except in the constructors of std::strstreambuf, negative values of std::streamsize are never used.
Example
#include <iostream>
#include <type_traits>
static_assert(std::is_signed_v<std::streamsize>);
int main()
{
std::cout << sizeof(std::streamsize) << '\n';
}
Possible output:
8
See also
| returns number of characters extracted by last unformatted input operation (public member function of std::basic_istream<CharT,Traits>) |
|
| extracts and discards characters until the given character is found (public member function of std::basic_istream<CharT,Traits>) |
|
| extracts blocks of characters (public member function of std::basic_istream<CharT,Traits>) |
|
| inserts blocks of characters (public member function of std::basic_ostream<CharT,Traits>) |
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https://en.cppreference.com/cpp/io/streamsize
