unique_id.fz
# This file is part of the Fuzion language implementation.
#
# The Fuzion language implementation is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License as published
# by the Free Software Foundation, version 3 of the License.
#
# The Fuzion language implementation is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
# License for more details.
#
# You should have received a copy of the GNU General Public License along with The
# Fuzion language implementation. If not, see <https://www.gnu.org/licenses/>.
# -----------------------------------------------------------------------
#
# Tokiwa Software GmbH, Germany
#
# Source code of Fuzion standard library feature unique_id
#
# -----------------------------------------------------------------------
# unique_id -- effect that generates a unique id
#
public unique_id (p Unique_Id_Handler) : simple_effect
is
public get => replace; p.get
type.install_default =>
(unique_id default_handler).default
# default handler using
# fuzion.sys.misc.unique_id to get unique id
#
type.default_handler : Unique_Id_Handler is
get => fuzion.sys.misc.unique_id
public Unique_Id_Handler ref is
public get u64 => abstract
# get a unique id > 0
#
# this can be used to add a unique identifier to compare instances.
#
# sine there are 2^64-1 possible values, you can safely assume that these are
# in fact unique. Assuming one unique id is consumed every nanosecond, it
# would take more than 500 years before we run out of values
# (2^64/10^9/3600/24/365.25).
#
public unique_id =>
unique_id.install_default
unique_id.env.get
last changed: 2024-03-07