version: 2
jobs:
  1dot64:
    docker:
      - image: cimg/rust:1.64.0
    steps:
      - checkout
      - run: 
          name: build and test
          command: cargo build
  1dot63:
    docker:
      - image: cimg/rust:1.63.0
    steps:
      - checkout
      - run:
          name: build and test
          command: cargo build
  1dot62:
    docker:
      - image: cimg/rust:1.62.0
    steps:
      - checkout
      - run:
          name: build and test
          command: cargo build

workflows:
  version: 2
  build_and_test:
    jobs:
      - 1dot64
      - 1dot63
      - 1dot62