27 Input/output library [input.output]

27.10 File systems [filesystems]

27.10.15 Filesystem operation functions [fs.op.funcs]

27.10.15.33 Resize file [fs.op.resize_file]

void resize_file(const path& p, uintmax_t new_size); void resize_file(const path& p, uintmax_t new_size, error_code& ec) noexcept;

1

Postconditions: file_size(p) == new_size.

2

Throws: As specified in [fs.err.report].

3

Remarks: Achieves its postconditions as if by POSIX truncate().