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change project_attributes to use attribute vars queue

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This commit is contained in:
Mark Thom
2019-02-20 19:34:31 -07:00
parent e66928725a
commit 0453435bcd
2 changed files with 17 additions and 26 deletions
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25
src/prolog/machine/attributed_variables.rs
View File

@@ -2,7 +2,7 @@ use prolog::heap_iter::*;
use prolog::machine::*;
use std::collections::HashSet;
use std::collections::hash_set::IntoIter;
use std::vec::IntoIter;
pub static VERIFY_ATTRS: &str = include_str!("attributed_variables.pl");
pub static PROJECT_ATTRS: &str = include_str!("project_attributes.pl");
@@ -85,20 +85,19 @@ impl MachineState {
self[temp_v!(2)] = value_list_addr;
}
fn gather_attr_vars_created_since(&self, h: usize) -> IntoIter<Addr> {
let mut attr_vars = HashSet::new();
pub(super)
fn gather_attr_vars_created_since(&self, b: usize) -> IntoIter<Addr>
{
let mut attr_vars: Vec<_> = self.attr_var_init.attr_var_queue[b ..]
.iter().filter_map(|h|
match self.store(self.deref(Addr::HeapCell(*h))) {
Addr::AttrVar(h) => Some(Addr::AttrVar(h)),
_ => None
}).collect();
for i in h .. self.heap.h {
let addr = self.heap[i].as_addr(i);
match addr {
Addr::AttrVar(h) if i == h => {
attr_vars.insert(Addr::AttrVar(h));
},
_ => {}
}
}
attr_vars.sort_unstable_by(|a1, a2| self.compare_term_test(a1, a2));
self.term_dedup(&mut attr_vars);
attr_vars.into_iter()
}

18
src/prolog/machine/system_calls.rs
View File

@@ -316,20 +316,12 @@ impl MachineState {
match self.store(self.deref(addr)) {
Addr::Con(Constant::Usize(b)) => {
let mut attr_vars: Vec<_> = self.attr_var_init.attr_var_queue[b ..]
.iter().filter_map(|h|
match self.store(self.deref(Addr::HeapCell(*h))) {
Addr::AttrVar(h) => Some(Addr::AttrVar(h)),
_ => None
}).collect();
attr_vars.sort_unstable_by(|a1, a2| self.compare_term_test(a1, a2));
self.term_dedup(&mut attr_vars);
let var_list_addr = Addr::HeapCell(self.heap.to_list(attr_vars.into_iter()));
let iter = self.gather_attr_vars_created_since(b);
let var_list_addr = Addr::HeapCell(self.heap.to_list(iter));
let list_addr = self[temp_v!(2)].clone();
self.unify(var_list_addr, list_addr);
self.unify(var_list_addr, list_addr);
},
_ => self.fail = true
}