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macro_rules! mk_iterator_mod {
{
modname = $modname:ident,
itername = $itername:ident,
iteryield = $yield:ty,
extname = $extname:ident,
extfnname = $extfnname:ident,
fun = $fun:expr
} => {
pub mod $modname {
use storeid::StoreId;
#[allow(unused_imports)]
use store::FileLockEntry;
use store::Store;
use failure::Fallible as Result;
pub struct $itername<'a>(Box<Iterator<Item = Result<StoreId>> + 'a>, &'a Store);
impl<'a> $itername<'a>
{
pub fn new(inner: Box<Iterator<Item = Result<StoreId>> + 'a>, store: &'a Store) -> Self {
$itername(inner, store)
}
}
impl<'a> Iterator for $itername<'a>
{
type Item = Result<$yield>;
fn next(&mut self) -> Option<Self::Item> {
self.0.next().map(|id| $fun(id?, self.1))
}
}
pub trait $extname<'a> {
fn $extfnname(self, store: &'a Store) -> $itername<'a>;
}
impl<'a, I> $extname<'a> for I
where I: Iterator<Item = Result<StoreId>> + 'a
{
fn $extfnname(self, store: &'a Store) -> $itername<'a> {
$itername(Box::new(self), store)
}
}
}
}
}
mk_iterator_mod! {
modname = create,
itername = StoreCreateIterator,
iteryield = FileLockEntry<'a>,
extname = StoreIdCreateIteratorExtension,
extfnname = into_create_iter,
fun = |id: StoreId, store: &'a Store| store.create(id)
}
mk_iterator_mod! {
modname = delete,
itername = StoreDeleteIterator,
iteryield = (),
extname = StoreIdDeleteIteratorExtension,
extfnname = into_delete_iter,
fun = |id: StoreId, store: &'a Store| store.delete(id)
}
mk_iterator_mod! {
modname = get,
itername = StoreGetIterator,
iteryield = Option<FileLockEntry<'a>>,
extname = StoreIdGetIteratorExtension,
extfnname = into_get_iter,
fun = |id: StoreId, store: &'a Store| store.get(id)
}
mk_iterator_mod! {
modname = retrieve,
itername = StoreRetrieveIterator,
iteryield = FileLockEntry<'a>,
extname = StoreIdRetrieveIteratorExtension,
extfnname = into_retrieve_iter,
fun = |id: StoreId, store: &'a Store| store.retrieve(id)
}
#[cfg(test)]
#[allow(dead_code)]
mod compile_test {
use store::Store;
use storeid::StoreId;
fn store() -> Store {
unimplemented!("Not implemented because in compile-test")
}
fn test_compile_get() {
let store = store();
let _ = store
.entries()
.unwrap()
.into_get_iter();
}
fn test_compile_get_result() {
fn to_result(e: StoreId) -> Result<StoreId, ()> {
Ok(e)
}
let store = store();
let _ = store
.entries()
.unwrap()
.into_get_iter();
}
}
use storeid::StoreId;
use storeid::StoreIdIterator;
use self::delete::StoreDeleteIterator;
use self::get::StoreGetIterator;
use self::retrieve::StoreRetrieveIterator;
use file_abstraction::iter::PathIterator;
use store::Store;
use failure::Fallible as Result;
pub struct Entries<'a>(PathIterator, &'a Store);
impl<'a> Entries<'a> {
pub(crate) fn new(pi: PathIterator, store: &'a Store) -> Self {
Entries(pi, store)
}
pub fn in_collection(self, c: &str) -> Self {
Entries(self.0.in_collection(c), self.1)
}
pub fn without_store(self) -> StoreIdIterator {
StoreIdIterator::new(Box::new(self.0))
}
pub fn into_delete_iter(self) -> StoreDeleteIterator<'a> {
StoreDeleteIterator::new(Box::new(self.0), self.1)
}
pub fn into_get_iter(self) -> StoreGetIterator<'a> {
StoreGetIterator::new(Box::new(self.0), self.1)
}
pub fn into_retrieve_iter(self) -> StoreRetrieveIterator<'a> {
StoreRetrieveIterator::new(Box::new(self.0), self.1)
}
}
impl<'a> Iterator for Entries<'a> {
type Item = Result<StoreId>;
fn next(&mut self) -> Option<Self::Item> {
self.0.next()
}
}