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remove pstr offsets unconditionally from printer iteration stack, deal with fallout after the fact (#1357)

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This commit is contained in:
Mark Thom
2022-03-16 19:11:39 -06:00
parent 895b02b641
commit 8e32bdd8db
1 changed files with 12 additions and 5 deletions
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15
src/heap_print.rs
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@@ -1184,18 +1184,25 @@ impl<'a, Outputter: HCValueOutputter> HCPrinter<'a, Outputter> {
let pstr = cell_as_string!(self.iter.heap[h]);
let pstr = pstr.as_str_from(offset.get_num() as usize);
let tag = value.get_tag();
if tag == HeapCellValueTag::PStrOffset {
// remove the fixnum offset from the iterator stack so we don't
// print an extraneous number. pstr offset value cells are never
// used by the iterator to mark cyclic terms so the removal is safe.
self.iter.pop_stack();
}
if max_depth > 0 && pstr.chars().count() + 1 >= max_depth {
if value.get_tag() != HeapCellValueTag::CStr {
if tag != HeapCellValueTag::PStrOffset && tag != HeapCellValueTag::CStr {
self.iter.pop_stack();
}
self.state_stack.push(TokenOrRedirect::Atom(atom!("...")));
self.state_stack.push(TokenOrRedirect::HeadTailSeparator);
} else if end_cell != empty_list_as_cell!() {
if end_h != h+1 && value.get_tag() != HeapCellValueTag::CStr {
self.iter.pop_stack();
self.iter.push_stack(h+1);
if tag == HeapCellValueTag::PStrOffset {
self.iter.push_stack(end_h);
}
self.state_stack.push(TokenOrRedirect::FunctorRedirect(max_depth));