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import scala.util.parsing.combinator.syntactical.TokenParsers
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import scala.util.parsing.combinator.lexical.StdLexical
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import scala.util.parsing.syntax.StdTokens
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class MyTokenParsers extends TokenParsers {
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type Tokens = StdTokens
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type Elem = lexical.Token
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val lexical = new StdLexical