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ringabout 6f96c4bc96 ref #20846 ; give a deprecation message for overriding = hook (#21020 )

give a deprecation message for overriding `=` hook

2022-12-05 07:13:51 +01:00

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 discard """
   errormsg: "Overriding `=` hook is deprecated; Override `=copy` hook instead"
   matrix: "--warningAsError[Deprecated]:on"
 """
 type
   SharedString = object
     data: string
 proc `=`(x: var SharedString, y: SharedString) =
   discard