Refactor filter op
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parent
6897041772
commit
8910d9df18
2 changed files with 87 additions and 207 deletions
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@ -197,117 +197,19 @@ impl<P: FilterPredicate + 'static> Op for FilterStatement<P> {
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}
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}
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impl<P: FilterPredicate + 'static> Iterator for FilterStatement<P> {
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type Item = IteratorItem;
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fn next(&mut self) -> Option<Self::Item> {
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if (self.predicate.is_complete() && self.other_filters.is_none()) || self.is_failing {
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return None;
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}
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//let self_clone = self.clone();
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//let self_clone2 = self_clone.clone();
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let fake = PseudoOp::Fake(format!("{}", self));
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//let ctx = self.context.as_mut().unwrap();
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impl <P: FilterPredicate + 'static> FilterStatement<P> {
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fn next_item(&mut self) -> Option<IteratorItem> {
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let fake_op = PseudoOp::from_printable(self);
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match &mut self.iterable {
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VariableOrOp::Op(op) => match op.try_real() {
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Ok(real_op) => {
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let ctx = self.context.take().unwrap();
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real_op.enter(ctx);
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let mut maybe_result = None;
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while let Some(item) = real_op.next() {
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let mut ctx = real_op.escape();
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match item {
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result = Some(Err(e));
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self.context = Some(ctx);
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break;
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}
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Ok(item) => {
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let matches_result = self.predicate.matches(&item, &mut ctx);
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let matches = match matches_result {
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Err(e) => {
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maybe_result = Some(Err(e.with(RuntimeOp(fake))));
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self.context = Some(ctx);
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break;
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}
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Ok(b) => b,
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};
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if let Some(inner) = &mut self.other_filters {
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// handle other filters
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// make fake inner item
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let single_op = SingleItem::new_ok(item.clone());
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match ctx
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.variables
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.declare(INNER_VARIABLE_NAME, Type::Op(Box::new(single_op)))
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{
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Ok(x) => x,
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result = Some(Err(e.with(RuntimeOp(fake))));
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self.context = Some(ctx);
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break;
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}
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};
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let inner_real = match inner.try_real() {
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Ok(x) => x,
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result = Some(Err(e));
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self.context = Some(ctx);
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break;
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}
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};
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inner_real.enter(ctx);
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match inner_real.next() {
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Some(item) => {
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maybe_result = Some(item);
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ctx = inner_real.escape();
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match ctx.variables.remove(INNER_VARIABLE_NAME) {
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Ok(_) => {}
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Err(e) => match maybe_result {
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Some(Ok(_)) => {
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maybe_result =
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Some(Err(e.with(RuntimeOp(fake))))
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}
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Some(Err(e2)) => maybe_result = Some(Err(e2)), // already failing, do not replace error,
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None => {} // impossible
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},
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}
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self.context = Some(ctx);
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break;
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}
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None => {
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ctx = inner_real.escape(); // move ctx back to expected spot
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match ctx.variables.remove(INNER_VARIABLE_NAME) {
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Ok(_) => {}
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result =
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Some(Err(e.with(RuntimeOp(fake))));
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self.context = Some(ctx);
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break;
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}
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}
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}
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}
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}
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if matches {
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//self.context = Some(op.escape());
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maybe_result = Some(Ok(item));
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self.context = Some(ctx);
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break;
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}
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}
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}
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real_op.enter(ctx);
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}
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if self.context.is_none() {
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let item = real_op.next();
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self.context = Some(real_op.escape());
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item
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}
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maybe_result
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}
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Err(e) => Some(Err(e)),
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Err(e) => return Some(Err(e)),
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},
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VariableOrOp::Variable(variable_name) => {
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let mut variable = match self
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@ -321,7 +223,7 @@ impl<P: FilterPredicate + 'static> Iterator for FilterStatement<P> {
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Ok(x) => {
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return Some(Err(RuntimeError {
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line: 0,
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op: fake,
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op: fake_op,
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msg: format!(
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"Expected operation/iterable type in variable {}, got {}",
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&variable_name, x
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@ -329,28 +231,47 @@ impl<P: FilterPredicate + 'static> Iterator for FilterStatement<P> {
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}))
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}
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Err(e) => {
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self.is_failing = true; // this is unrecoverable and reproducible, so it shouldn't be tried again (to prevent error spam)
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return Some(Err(e.with(RuntimeOp(fake))));
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}
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self.is_failing = true;
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return Some(Err(e.with(RuntimeOp(PseudoOp::from_printable(self)))));
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},
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};
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let mut maybe_result = None;
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let ctx = self.context.take().unwrap();
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variable.enter(ctx);
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while let Some(item) = variable.next() {
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let mut ctx = variable.escape();
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match item {
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Err(e) => {
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maybe_result = Some(Err(e));
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self.context = Some(ctx);
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break;
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variable.enter(self.context.take().unwrap());
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let item = variable.next();
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self.context = Some(variable.escape());
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if let Err(e) = self
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.context
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.as_mut()
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.unwrap()
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.variables
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.declare(variable_name, Type::Op(variable))
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{
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return Some(Err(e.with(RuntimeOp(PseudoOp::from_printable(self)))));
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}
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item
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}
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}
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}
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}
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impl<P: FilterPredicate + 'static> Iterator for FilterStatement<P> {
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type Item = IteratorItem;
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fn next(&mut self) -> Option<Self::Item> {
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if (self.predicate.is_complete() && self.other_filters.is_none()) || self.is_failing {
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return None;
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}
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//let ctx = self.context.as_mut().unwrap();
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while let Some(next_item) = self.next_item() {
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match next_item {
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Ok(item) => {
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let matches_result = self.predicate.matches(&item, &mut ctx);
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//let ctx = self.context.as_mut().unwrap();
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let matches_result = self.predicate.matches(&item, self.context.as_mut().unwrap());
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let matches = match matches_result {
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Err(e) => {
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maybe_result = Some(Err(e.with(RuntimeOp(fake.clone()))));
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self.context = Some(ctx);
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break;
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//maybe_result = Some(Err(e.with(RuntimeOp(PseudoOp::from_printable(self)))));
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//self.context = Some(ctx);
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return Some(Err(e.with(RuntimeOp(PseudoOp::from_printable(self)))));
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}
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Ok(b) => b,
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};
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@ -358,85 +279,34 @@ impl<P: FilterPredicate + 'static> Iterator for FilterStatement<P> {
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// handle other filters
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// make fake inner item
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let single_op = SingleItem::new_ok(item.clone());
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match ctx
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let preexisting_var = self.context.as_mut().unwrap()
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.variables
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.declare(INNER_VARIABLE_NAME, Type::Op(Box::new(single_op)))
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{
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Ok(x) => x,
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result = Some(Err(e.with(RuntimeOp(fake.clone()))));
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self.context = Some(ctx);
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break;
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}
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};
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.swap(INNER_VARIABLE_NAME, Some(Type::Op(Box::new(single_op))));
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let inner_real = match inner.try_real() {
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Ok(x) => x,
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result = Some(Err(e));
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self.context = Some(ctx);
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break;
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}
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Err(e) => return Some(Err(e))
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};
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inner_real.enter(ctx);
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inner_real.enter(self.context.take().unwrap());
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match inner_real.next() {
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Some(item) => {
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maybe_result = Some(item);
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ctx = inner_real.escape();
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match ctx.variables.remove(INNER_VARIABLE_NAME) {
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Ok(_) => {}
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Err(e) => match maybe_result {
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Some(Ok(_)) => {
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maybe_result =
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Some(Err(e.with(RuntimeOp(fake.clone()))))
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}
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Some(Err(e2)) => maybe_result = Some(Err(e2)), // already failing, do not replace error,
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None => {} // impossible
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},
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}
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self.context = Some(ctx);
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break;
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self.context = Some(inner_real.escape());
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self.context.as_mut().unwrap().variables.swap(INNER_VARIABLE_NAME, preexisting_var);
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return Some(item);
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}
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None => {
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ctx = inner_real.escape(); // move ctx back to expected spot
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match ctx.variables.remove(INNER_VARIABLE_NAME) {
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Ok(_) => {}
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Err(e) => {
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//self.context = Some(op.escape());
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maybe_result =
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Some(Err(e.with(RuntimeOp(fake.clone()))));
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self.context = Some(ctx);
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break;
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}
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}
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self.context = Some(inner_real.escape()); // move ctx back to expected spot
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self.context.as_mut().unwrap().variables.swap(INNER_VARIABLE_NAME, preexisting_var);
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}
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}
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}
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if matches {
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maybe_result = Some(Ok(item));
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self.context = Some(ctx);
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break;
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}
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}
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}
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variable.enter(ctx);
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}
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if self.context.is_none() {
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self.context = Some(variable.escape());
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}
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match self
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.context
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.as_mut()
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.unwrap()
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.variables
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.declare(variable_name, Type::Op(variable))
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{
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Err(e) => Some(Err(e.with(RuntimeOp(fake)))),
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Ok(_) => maybe_result,
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}
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return Some(Ok(item));
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}
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},
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Err(e) => return Some(Err(e)),
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};
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}
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None
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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@ -56,6 +56,8 @@ pub trait VariableStorer: Debug {
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fn remove(&mut self, name: &str) -> Result<Type, RuntimeMsg>;
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fn swap(&mut self, name: &str, value: Option<Type>) -> Option<Type>;
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fn exists(&self, name: &str) -> bool {
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self.get_opt(name).is_some()
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}
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@ -99,6 +101,14 @@ impl VariableStorer for OpStorage {
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}
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}
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fn swap(&mut self, key: &str, item: Option<Type>) -> Option<Type> {
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if let Some(item) = item {
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self.storage.insert(key.to_string(), item)
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} else {
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None
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}
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}
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fn remove(&mut self, key: &str) -> Result<Type, RuntimeMsg> {
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if self.storage.contains_key(key) {
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Ok(self.storage.remove(key).unwrap())
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