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definition module WhileLexer
from StdOverloaded import class ==
from GenEq import generic gEq
import WhileCommon
:: Token = SkipToken
| IfToken | ThenToken | ElseToken
| WhileToken | DoToken
| CompToken
| AssToken
| EqToken | NeToken | LtToken | LeToken | GtToken | GeToken
| OrToken | AndToken | NotToken
| AddToken | SubToken | MulToken | DivToken
| VarToken Var
| LiteralToken Int
| BoolToken Bool
| ParenOpen | ParenClose
derive gEq Token
instance == Token
lex :: [Char] -> Either Error [Token]
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