Update free.rs

This commit is contained in:
Shunsuke Shibayama 2022-10-29 10:53:30 +09:00
parent c2d4015f9b
commit 44b81fd9a2

View file

@ -47,7 +47,7 @@ pub trait HasLevel {
} }
fn lift(&self) { fn lift(&self) {
if let Some(lev) = self.level() { if let Some(lev) = self.level() {
self.set_level(lev + 1); self.set_level(lev.saturating_add(1));
} }
} }
fn generalize(&self) { fn generalize(&self) {