Method eat2

src/expr-parser/src/parser.rs:1535–1543

(&self, t1: T1, t2: T2)

        }

        fn eat2<T1: Eat, T2: Eat>(&self, t1: T1, t2: T2) -> bool {
            if self.peek(t1) && self.peek2(t2) {
                self.parse::<T1::Token>().unwrap();
                self.parse::<T2::Token>().unwrap();
                true
            } else {
                false
            }
        }

        fn eat3<T1: Eat, T2: Eat, T3: Eat>(&self, t1: T1, t2: T2, t3: T3) -> bool {
            if self.peek(t1) && self.peek2(t2) && self.peek3(t3) {