URI::Generic#check_host

# File tmp/rubies/ruby-4.0.0/lib/uri/generic.rb, line 600
def check_host(v)
  return v unless v

  if @opaque
    raise InvalidURIError,
      "cannot set host with registry or opaque"
  elsif parser.regexp[:HOST] !~ v
    raise InvalidComponentError,
      "bad component(expected host component): #{v}"
  end

  return true
end