Method fill

regex/src/compile.rs:638–650

(&mut self, hole: Hole, goto: InstPtr)

    }

    fn fill(&mut self, hole: Hole, goto: InstPtr) {
        match hole {
            Hole::None => {}
            Hole::One(pc) => {
                self.insts[pc].fill(goto);
            }
            Hole::Many(holes) => {
                for hole in holes {
                    self.fill(hole, goto);
                }
            }
        }
    }

    fn fill_to_next(&mut self, hole: Hole) {
        let next = self.insts.len();