End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

StringIO#eof

strio.eof → true or false

ext/stringio/stringio.c View on GitHub ↗

static VALUE
strio_eof(VALUE self)
{
    if (strio_to_read(self)) return Qfalse;
    return Qtrue;
}

Returns true if the stream is at the end of the data (underlying string). The stream must be opened for reading or an IOError will be raised.

See also #eof? #each_line #each_codepoint #external_encoding also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1