rishi/scryer-prolog
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slight tweaks.

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This commit is contained in:
Mark Thom
2017-03-25 21:35:31 -06:00
parent b7ff27af1b
commit 02482aec8a
6 changed files with 48 additions and 25 deletions
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12
src/prolog/machine.rs
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@@ -81,24 +81,22 @@ impl Machine {
}
pub fn add_fact(&mut self, fact: &Term, mut code: Code) {
if fact.name().is_some() {
let p = self.code.len();
let name = fact.name().unwrap().clone();
if let Some(name) = fact.name() {
let p = self.code.len();
let arity = fact.arity();
self.code.append(&mut code);
self.code_dir.insert((name, arity), p);
self.code_dir.insert((name.clone(), arity), p);
}
}
pub fn add_rule(&mut self, rule: &Rule, mut code: Code) {
if rule.head.0.name().is_some() {
if let Some(name) = rule.head.0.name() {
let p = self.code.len();
let name = rule.head.0.name().unwrap().clone();
let arity = rule.head.0.arity();
self.code.append(&mut code);
self.code_dir.insert((name, arity), p);
self.code_dir.insert((name.clone(), arity), p);
}
}