io/dir/open.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 io.dir.open
#
# -----------------------------------------------------------------------
# effect for manipulating open directories
# T is used to distinguish several open directories
#
module:public open(public T type,
private fd i64,
public path String) : simple_effect is
# reads the next entry of this directory
#
# returns the name of the next entry, or an error if the operation fails
# for some reason (including that there are no more entries).
#
public read outcome String ! io.dir.read =>
io.dir.read.read fd
# short hand to get the currently
# installed open effect
# for type T from the environment.
# see `use` on how to use this.
#
public open(T type) =>
(open T).env
# unit type used internally by open- and use-
# short hands which can be used when one does not need
# to distinguish between several open directories.
#
private:public open_unique_type is
# short hand to get the currently
# installed open effect
# from the environment.
# see `use` on how to use this.
#
public open =>
(open open_unique_type).env
last changed: 2024-03-07