-----------------------------------------------------------------------
-- Project: Bluespec

-- File: EDupField1.bs

-- Author : Nitin Chand Rahul      <ncr@noida.interrasystems.com>

-- Description: This testcase triggers a "field defined more than once" error (EDupField)

-- Error Message : bsc EDupField1.bs
-- bsc: Compilation errors:
-- "EDupField1.bs", line 47, column 12, Field "start" defined more than once
-----------------------------------------------------------------------

package EDupField1 (EDupField1(..), mkEDupField1) where

-- import Int

interface EDupField1 =
    start :: Int 32 -> Int 32 -> Action
    start :: Int 32


mkEDupField1 :: Module EDupField1
mkEDupField1 =
    module

        x :: Reg (Int 32)
        x <- mkReg 0

        y :: Reg (Int 32)
        y <- mkReg 0

        rules
          "Swap":
            when x > y, y /= 0
              ==> action
                      x := y
                      y := x

          "Subtract":
            when x <= y, y /= 0
              ==> action
                      y := y - x

        interface
            start ix iy = action
                              x := ix
                              y := iy
                          when y == 0
            start = x when y == 0