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create read_term/3 variable lists in order of variable occurrence within terms

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This commit is contained in:
Mark Thom
2021-12-23 13:31:49 -07:00
parent c60ada8421
commit 9d06229cba
1 changed files with 24 additions and 12 deletions
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36
src/machine/machine_state.rs
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@@ -415,21 +415,12 @@ impl MachineState {
return Ok(());
}
let list_of_var_eqs = push_var_eq_functors(
&mut self.heap,
term_write_result.var_dict.iter(),
&indices.op_dir,
self.atom_tbl.clone(),
);
let mut singleton_var_set: IndexMap<Ref, bool> = IndexMap::new();
let mut var_list = vec![];
for addr in self.acyclic_pre_order_iter(term) {
if let Some(var) = addr.as_var() {
if !singleton_var_set.contains_key(&var) {
singleton_var_set.insert(var, true);
var_list.push(addr);
} else {
singleton_var_set.insert(var, false);
}
@@ -449,9 +440,28 @@ impl MachineState {
self.atom_tbl.clone(),
);
let mut var_list = Vec::with_capacity(singleton_var_set.len());
for (var_name, addr) in term_write_result.var_dict {
if let Some(var) = addr.as_var() {
let idx = singleton_var_set.get_index_of(&var).unwrap();
var_list.push((var_name, addr, idx));
}
}
var_list.sort_by(|(_,_,idx_1),(_,_,idx_2)| idx_1.cmp(idx_2));
let list_of_var_eqs = push_var_eq_functors(
&mut self.heap,
var_list.iter().map(|(var_name, var,_)| (var_name,var)),
&indices.op_dir,
self.atom_tbl.clone(),
);
let singleton_addr = self[temp_v!(3)];
let singletons_offset =
Addr::HeapCell(self.heap.to_list(singleton_var_list.into_iter()));
let singletons_offset = Addr::HeapCell(self.heap.to_list(
singleton_var_list.into_iter()
));
(self.unify_fn)(self, singletons_offset, singleton_addr);
@@ -460,7 +470,9 @@ impl MachineState {
}
let vars_addr = self[temp_v!(4)];
let vars_offset = Addr::HeapCell(self.heap.to_list(var_list.into_iter()));
let vars_offset = Addr::HeapCell(self.heap.to_list(
var_list.into_iter().map(|(_,var,_)| var)
));
(self.unify_fn)(self, vars_offset, vars_addr);