End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

StringIO#close

close → nil

ext/stringio/stringio.c View on GitHub ↗

static VALUE
strio_close(VALUE self)
{
    StringIO(self);
    RBASIC(self)->flags &= ~STRIO_READWRITE;
    return Qnil;
}

Closes self for both reading and writing.

Raises IOError if reading or writing is attempted.

See also #binmode #closed? .open #closed_read? also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0