rules:
  - id: non-optimal-variables-swap
    message: Consider swapping variables using `($VAR1, $VAR2) = ($VAR2, $VAR1)` to save gas
    languages: [solidity]
    severity: INFO
    metadata:
      category: performance
      technology:
        - solidity
      references:
        - https://dev.to/oliverjumpertz/solidity-quick-tip-efficiently-swap-two-variables-1f8i
    patterns:
      - pattern: |
          $TMP = $VAR1;
          ...
          $VAR1 = $VAR2;
          ...
          $VAR2 = $TMP;