# Expect a `EncodingDecl` token, without the initial `S` token.
	private fun expect_encoding_decl: Bool do
		var encoding = new FlatBuffer

		if not lexer.expect_string("encoding", "") or not lexer.expect_eq or
				not expect_literal(encoding) then
			return false
		end
		if not encoding.has("^[A-Za-z][A-Za-z0-9._-]*$".to_re) then
			return model.fire_fatal_error("`{encoding.to_s}` is not a valid " +
					"encoding name.", null)
		end
		# TODO: Do something with the value.
		return true
	end