Question: Study some grammar notation, for example, YACC/LEX [25], SDF [57], or ANTLR [46], with regard to the definition of lexical units and the handling of

Study some grammar notation, for example, YACC/LEX [25], SDF [57], or ANTLR [46], with regard to the definition of lexical units and the handling of layout (white space and comments). Explain and illustrate your findings. Implement bottom-up parsing in Haskell.

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