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use heap_pstr_iter in AtomChars (#482)

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This commit is contained in:
Mark Thom
2020-05-10 15:46:51 -06:00
parent c1df7ead1a
commit 540bc71873
2 changed files with 25 additions and 21 deletions
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44
src/prolog/machine/system_calls.rs
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@@ -864,30 +864,34 @@ impl MachineState {
self.unify(a2, list_of_chars);
}
addr if addr.is_ref() => {
let stub = MachineError::functor_stub(clause_name!("atom_chars"), 2);
let mut iter = self.heap_pstr_iter(self[temp_v!(2)]);
let string = iter.to_string();
match self.try_from_list(temp_v!(2), stub) {
Err(e) => {
return Err(e);
match iter.focus() {
Addr::EmptyList => {
let chars = clause_name!(string, indices.atom_tbl);
let atom = self.heap.to_unifiable(
HeapCellValue::Atom(chars, None)
);
self.unify(addr, atom);
}
Ok(addrs) => {
match self.try_char_list(addrs) {
Ok(string) => {
let chars = clause_name!(string, indices.atom_tbl);
let atom = self.heap.to_unifiable(
HeapCellValue::Atom(chars, None)
);
focus => {
let stub = MachineError::functor_stub(
clause_name!("atom_chars"),
2,
);
self.unify(addr, atom);
}
Err(err) => {
let stub = MachineError::functor_stub(
clause_name!("atom_chars"),
2,
);
if let Addr::Lis(l) = focus {
let err = MachineError::type_error(
self.heap.h(),
ValidType::Character,
Addr::HeapCell(l),
);
return Err(self.error_form(err, stub));
}
return Err(self.error_form(err, stub));
} else {
unreachable!()
}
}
}