95 lines
3 KiB
Rust
95 lines
3 KiB
Rust
//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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macro_rules! mk_iterator_mod {
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{
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modname = $modname:ident,
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itername = $itername:ident,
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iteryield = $yield:ty,
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extname = $extname:ident,
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extfnname = $extfnname:ident,
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fun = $fun:expr
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} => {
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pub mod $modname {
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use storeid::StoreIdIterator;
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use storeid::StoreId;
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#[allow(unused_imports)]
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use store::FileLockEntry;
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use store::Store;
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use error::Result;
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pub struct $itername<'a>(StoreIdIterator, &'a Store);
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impl<'a> Iterator for $itername<'a> {
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type Item = Result<$yield>;
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fn next(&mut self) -> Option<Self::Item> {
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self.0.next().map(|id| $fun(id, self.1))
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}
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}
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pub trait $extname<'a> {
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fn $extfnname(self, store: &'a Store) -> $itername<'a>;
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}
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impl<'a> $extname<'a> for StoreIdIterator {
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fn $extfnname(self, store: &'a Store) -> $itername<'a> {
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$itername(self, store)
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}
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}
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}
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}
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}
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mk_iterator_mod! {
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modname = create,
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itername = StoreCreateIterator,
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iteryield = FileLockEntry<'a>,
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extname = StoreIdCreateIteratorExtension,
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extfnname = into_create_iter,
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fun = |id: StoreId, store: &'a Store| store.create(id)
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}
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mk_iterator_mod! {
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modname = delete,
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itername = StoreDeleteIterator,
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iteryield = (),
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extname = StoreIdDeleteIteratorExtension,
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extfnname = into_delete_iter,
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fun = |id: StoreId, store: &'a Store| store.delete(id)
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}
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mk_iterator_mod! {
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modname = get,
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itername = StoreGetIterator,
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iteryield = Option<FileLockEntry<'a>>,
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extname = StoreIdGetIteratorExtension,
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extfnname = into_get_iter,
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fun = |id: StoreId, store: &'a Store| store.get(id)
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}
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mk_iterator_mod! {
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modname = retrieve,
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itername = StoreRetrieveIterator,
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iteryield = FileLockEntry<'a>,
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extname = StoreIdRetrieveIteratorExtension,
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extfnname = into_retrieve_iter,
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fun = |id: StoreId, store: &'a Store| store.retrieve(id)
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}
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