End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

StringScanner#empty?

empty?

static VALUE
strscan_empty_p(VALUE self)
{
    rb_warning("StringScanner#empty? is obsolete; use #eos? instead");
    return strscan_eos_p(self);
}

Equivalent to eos?. This method is obsolete, use eos? instead.

See also #concat #eos? #clear #exist? also in 3.3 · 3.2 · 3.0