instance method

StringIO#close_write

() -> nil

close_write → nil

ext/stringio/stringio.c View on GitHub ↗

static VALUE
strio_close_write(VALUE self)
{
    struct StringIO *ptr = StringIO(self);
    if (!(ptr->flags & FMODE_WRITABLE)) {
        rb_raise(rb_eIOError, "closing non-duplex IO for writing");
    }
    RBASIC(self)->flags &= ~STRIO_WRITABLE;
    return Qnil;
}

Closes self for writing; closed-read setting remains unchanged; returns nil:

Example

strio = StringIO.new
strio.closed_write? # => false
strio.close_write   # => nil
strio.closed_write? # => true
strio.closed_read?  # => false
strio.write('foo')  # Raises IOError: not opened for writing

See also #close_read #each #closed_write? #each_byte also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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