exec pint parse 'rate(bar[5m+1m])'
cmp stdout stdout.txt
! stderr .

-- stdout.txt --
++ node: rate(bar[5m + 1m])
  Call:
    * Type: vector
    * Func: rate
    * Args: bar[5m + 1m]
      ++ node: bar[5m + 1m]
        Expressions:
          ++ node: bar[5m + 1m]
            MatrixSelector:
              * Type: matrix
              * VectorSelector: bar
              * Range: 0s
              * RangeExpr: 5m + 1m
                ++ node: 5m + 1m
                  DurationExpr:
                    * Type: scalar
                    * Op: +
                    * LHS: 5m
                    * RHS: 1m
                    * Wrapped: false
