Method eat

src/expr-parser/src/parser.rs:1526–1533

(&self, t: T)

        }

        fn eat<T: Eat>(&self, t: T) -> bool {
            if self.peek(t) {
                self.parse::<T::Token>().unwrap();
                true
            } else {
                false
            }
        }

        fn eat2<T1: Eat, T2: Eat>(&self, t1: T1, t2: T2) -> bool {
            if self.peek(t1) && self.peek2(t2) {