[Haskell-cafe] binaryop

Ryan Bloor ryanbloor at hotmail.com
Sun Dec 9 16:40:36 EST 2007

hi  sorry for vagueness.  I am writing a basic Parser from scratch. So far I have functions;  # removeSpaces # match - which checks if a string is a substring of another # orParser which combines two parser's abilities # Basic pasrers like... parseInt, parseTrue, parseFalse, parseBoolusing the orParser on True and False.  What I want to do now is have a parseBinaryOp that recognises: parseBinaryOp "+" "(5 + 2) if"                      >>>gives>>             [(EInt 5, EInt 2, "if")]  So I think that I have to split the initial string into four parts.  "+" becomes op '(' becomes tokenF ')' becomes tokenB "5" becomes e1 "2" becomes e2  parseBinaryOp :: String -> String -> [(Expr, Expr, String)]parseBinaryOp op str = let (tokenF,e1,op,e2,tokenB) =  I am not sure how to go about separating the string for how I need itusing my other functiuons. Ryan
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