backtrack attributed variable bindings after failure (#242)

2019-11-29 13:47:22 -04:00
parent 2d719ab6b7
commit 3e49db1a29
7 changed files with 90 additions and 74 deletions
--- a/src/prolog/machine/machine_state_impl.rs
+++ b/src/prolog/machine/machine_state_impl.rs
@@ -3300,6 +3300,7 @@ impl MachineState {
                    self.e,
                    self.cp.clone(),
                    self.attr_var_init.attr_var_queue.len(),
+                    self.attr_var_init.bindings.len(),
                    self.b,
                    self.p.clone() + 1,
                    self.tr,
@@ -3339,6 +3340,7 @@ impl MachineState {
                    self.e,
                    self.cp.clone(),
                    self.attr_var_init.attr_var_queue.len(),
+                    self.attr_var_init.bindings.len(),
                    self.b,
                    self.p.clone() + offset,
                    self.tr,