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-rw-r--r--chain/src/default.rs226
-rw-r--r--chain/src/lib.rs20
2 files changed, 151 insertions, 95 deletions
diff --git a/chain/src/default.rs b/chain/src/default.rs
index 08e29ce..7ee460c 100644
--- a/chain/src/default.rs
+++ b/chain/src/default.rs
@@ -485,7 +485,12 @@ impl Chain for DefaultChain {
// Of course we can use an optional vector to prevent allocating
// too much memory for edges whose corresponding vector is empty.
- fn derive(&mut self, t: usize, pos: usize) -> Result<Self::DerIter, Self::Error> {
+ fn derive(
+ &mut self,
+ t: usize,
+ pos: usize,
+ no_item: bool,
+ ) -> Result<Self::DerIter, Self::Error> {
use TNT::*;
/// A helper function to generate edges to join.
@@ -610,35 +615,41 @@ impl Chain for DefaultChain {
match *atom_label.get_value() {
Some(Ter(ter)) if ter == t => {
- // prepare forest fragment
-
- let fragment =
- generate_fragment([atom_moved.into(), Ter(ter).into()], pos)?;
-
- if pos == 4 {
- dbg!(atom_moved, label);
- self.forest
- .print_viz(&format!(
- "pos4tb - {atom_moved}-{:?}.gv",
- label.true_source()
- ))
- .unwrap();
- }
+ let new_pavi: PaVi;
- let new_pavi = self.forest.insert_item(
- *label,
- fragment,
- atom_child_iter.clone(),
- &self.atom,
- )?;
+ if !no_item {
+ // prepare forest fragment
+
+ let fragment =
+ generate_fragment([atom_moved.into(), Ter(ter).into()], pos)?;
+
+ if pos == 4 {
+ dbg!(atom_moved, label);
+ self.forest
+ .print_viz(&format!(
+ "pos4tb - {atom_moved}-{:?}.gv",
+ label.true_source()
+ ))
+ .unwrap();
+ }
+
+ new_pavi = self.forest.insert_item(
+ *label,
+ fragment,
+ atom_child_iter.clone(),
+ &self.atom,
+ )?;
- if pos == 4 {
- self.forest
- .print_viz(&format!(
- "pos4ta - {atom_moved}-{:?}.gv",
- label.true_source()
- ))
- .unwrap();
+ if pos == 4 {
+ self.forest
+ .print_viz(&format!(
+ "pos4ta - {atom_moved}-{:?}.gv",
+ label.true_source()
+ ))
+ .unwrap();
+ }
+ } else {
+ new_pavi = PaVi::default();
}
let accepting = generate_edges(
@@ -669,52 +680,60 @@ impl Chain for DefaultChain {
.map_err(index_out_of_bounds_conversion)?;
if let Some(virtual_node) = virtual_node {
- let first_fragment =
- generate_fragment([atom_moved.into(), Non(non).into()], pos)?;
-
- if pos == 4 {
- dbg!(atom_moved, label);
- self.forest
- .print_viz(&format!("pos4nb - {atom_moved}-{:?}.gv", label))
- .unwrap();
- }
-
- let first_segment_pavi = self.forest.insert_item(
- *label,
- first_fragment,
- atom_child_iter.clone(),
- &self.atom,
- )?;
-
- if pos == 4 {
- self.forest
- .print_viz(&format!("pos4na - {atom_moved}-{:?}.gv", label))
- .unwrap();
- }
-
let accepting = self
.atom
.is_accepting(virtual_node)
.map_err(index_out_of_bounds_conversion)?;
- let virtual_fragment =
- DefaultForest::new_leaf(GrammarLabel::new(Ter(t), pos));
-
- // NOTE: We only need the PaVi from the
- // first segment, so we pass an empty
- // iterator, in which case the passed
- // label is only used for the PaVi.
- let virtual_pavi = self.forest.insert_item(
- Edge::new(0, first_segment_pavi, accepting),
- virtual_fragment,
- std::iter::empty(),
- &self.atom,
- )?;
+ let first_segment_pavi: PaVi;
+ let virtual_pavi: PaVi;
- if pos == 4 {
- self.forest
- .print_viz(&format!("pos4va - {atom_moved}-{:?}.gv", label))
- .unwrap();
+ if !no_item {
+ let first_fragment =
+ generate_fragment([atom_moved.into(), Non(non).into()], pos)?;
+
+ if pos == 4 {
+ dbg!(atom_moved, label);
+ self.forest
+ .print_viz(&format!("pos4nb - {atom_moved}-{:?}.gv", label))
+ .unwrap();
+ }
+
+ first_segment_pavi = self.forest.insert_item(
+ *label,
+ first_fragment,
+ atom_child_iter.clone(),
+ &self.atom,
+ )?;
+
+ if pos == 4 {
+ self.forest
+ .print_viz(&format!("pos4na - {atom_moved}-{:?}.gv", label))
+ .unwrap();
+ }
+
+ let virtual_fragment =
+ DefaultForest::new_leaf(GrammarLabel::new(Ter(t), pos));
+
+ // NOTE: We only need the PaVi from the
+ // first segment, so we pass an empty
+ // iterator, in which case the passed
+ // label is only used for the PaVi.
+ virtual_pavi = self.forest.insert_item(
+ Edge::new(0, first_segment_pavi, accepting),
+ virtual_fragment,
+ std::iter::empty(),
+ &self.atom,
+ )?;
+
+ if pos == 4 {
+ self.forest
+ .print_viz(&format!("pos4va - {atom_moved}-{:?}.gv", label))
+ .unwrap();
+ }
+ } else {
+ first_segment_pavi = PaVi::default();
+ virtual_pavi = PaVi::default();
}
let mut new_edges = Vec::new();
@@ -1020,26 +1039,37 @@ mod test_chain {
#[test]
fn base_test() -> Result<(), Box<dyn std::error::Error>> {
+ let mut no_item = false;
+
+ for arg in std::env::args() {
+ if arg == "no_item" {
+ no_item = true;
+ break;
+ }
+ }
+
let grammar = new_notes_grammar()?;
let atom = DefaultAtom::from_grammar(grammar)?;
let mut chain = DefaultChain::unit(atom)?;
- chain.chain(3, 00)?;
- chain.chain(1, 01)?;
- chain.chain(2, 02)?;
- chain.chain(2, 03)?;
- chain.chain(2, 04)?;
- chain.chain(0, 05)?;
- chain.chain(5, 06)?;
- chain.chain(1, 07)?;
- chain.chain(6, 08)?;
- chain.chain(6, 09)?;
- chain.chain(6, 10)?;
- chain.chain(0, 11)?;
- chain.chain(0, 12)?;
-
- chain.end_of_input()?;
+ chain.chain(3, 00, no_item)?;
+ chain.chain(1, 01, no_item)?;
+ chain.chain(2, 02, no_item)?;
+ chain.chain(2, 03, no_item)?;
+ chain.chain(2, 04, no_item)?;
+ chain.chain(0, 05, no_item)?;
+ chain.chain(5, 06, no_item)?;
+ chain.chain(1, 07, no_item)?;
+ chain.chain(6, 08, no_item)?;
+ chain.chain(6, 09, no_item)?;
+ chain.chain(6, 10, no_item)?;
+ chain.chain(0, 11, no_item)?;
+ chain.chain(0, 12, no_item)?;
+
+ if !no_item {
+ chain.end_of_input()?;
+ }
for label in chain.labels_of(chain.current())?.map(|(label, _)| label) {
dbg!(label);
@@ -1062,20 +1092,29 @@ mod test_chain {
#[test]
fn test_ambiguity() -> Result<(), Box<dyn std::error::Error>> {
+ let mut no_item = false;
+
+ for arg in std::env::args() {
+ if arg == "no_item" {
+ no_item = true;
+ break;
+ }
+ }
+
let grammar = new_paren_grammar()?;
let atom = DefaultAtom::from_grammar(grammar)?;
let mut chain = DefaultChain::unit(atom)?;
- chain.chain(0, 0)?;
+ chain.chain(0, 0, no_item)?;
chain.forest.print_viz("forest0.gv")?;
- chain.chain(2, 1)?;
+ chain.chain(2, 1, no_item)?;
chain.forest.print_viz("forest1.gv")?;
- chain.chain(2, 2)?;
+ chain.chain(2, 2, no_item)?;
chain.forest.print_viz("forest2.gv")?;
- chain.chain(2, 3)?;
+ chain.chain(2, 3, no_item)?;
chain.forest.print_viz("forest3.gv")?;
- chain.chain(1, 4)?;
+ chain.chain(1, 4, no_item)?;
chain.forest.print_viz("forest4.gv")?;
chain.end_of_input()?;
chain.forest.print_viz("forest.gv")?;
@@ -1110,6 +1149,15 @@ mod test_chain {
#[test]
fn test_speed() -> Result<(), Box<dyn std::error::Error>> {
+ let mut no_item = false;
+
+ for arg in std::env::args() {
+ if arg == "no_item" {
+ no_item = true;
+ break;
+ }
+ }
+
let grammar = new_notes_grammar_no_regexp()?;
println!("grammar: {grammar}");
@@ -1144,7 +1192,7 @@ mod test_chain {
let start = std::time::Instant::now();
for (index, t) in input.iter().copied().enumerate() {
- chain.chain(t, index)?;
+ chain.chain(t, index, no_item)?;
}
let elapsed = start.elapsed();
diff --git a/chain/src/lib.rs b/chain/src/lib.rs
index d7fc519..9de1df7 100644
--- a/chain/src/lib.rs
+++ b/chain/src/lib.rs
@@ -258,11 +258,9 @@ pub trait Chain: LabelExtGraph<Edge> {
/// An iterator that iterates all layers that need to be merged.
type DerIter: Iterator<Item = TwoLayers>;
- // FIXME: Add a parameter to control whether to manipulate the
- // forests or not.
-
/// Take the derivative by a terminal `t` at position `pos`.
- fn derive(&mut self, t: usize, pos: usize) -> Result<Self::DerIter, Self::Error>;
+ fn derive(&mut self, t: usize, pos: usize, no_item: bool)
+ -> Result<Self::DerIter, Self::Error>;
/// Take the union of all derivatives.
fn union(&mut self, der_iter: Self::DerIter) -> Result<Vec<(Roi, usize)>, Self::Error> {
@@ -279,8 +277,18 @@ pub trait Chain: LabelExtGraph<Edge> {
/// Use chain rule to compute the derivative with respect to a
/// terminal.
- fn chain(&mut self, t: usize, pos: usize) -> Result<(), Self::Error> {
- let der_iter = self.derive(t, pos)?;
+ ///
+ /// # Arguments
+ ///
+ /// The argument `t` is the terminal we computet the derivative
+ /// with.
+ ///
+ /// The argument `pos` is the position within the input.
+ ///
+ /// The argument `no_item` determines whether we want the item
+ /// derivation forest as well.
+ fn chain(&mut self, t: usize, pos: usize, no_item: bool) -> Result<(), Self::Error> {
+ let der_iter = self.derive(t, pos, no_item)?;
let edges = self.union(der_iter)?;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-26 19:01:27 +0000