On 24 December 2010 18:24, Henning Thielemann <lemm...@henning-thielemann.de > wrote:
> > On Fri, 24 Dec 2010, Aaron Gray wrote: > > The compiler is requesting an instance declaration for Show :- >> >> expr-eval.hs:334:23: >> No instance for (Show ([(String, Int)] -> Int)) >> arising from a use of `print' at expr-eval.hs:334:23-27 >> Possible fix: >> add an instance declaration for (Show ([(String, Int)] -> Int)) >> In the first argument of `(.)', namely `print' >> In the second argument of `(>>=)', namely `print . calc . lexer' >> In the expression: getContents >>= print . calc . lexer >> > > ... maybe 'calc' needs a further argument? > I have attached what I have typed in so far. Aaron
expr-eval.y
Description: Binary data
expr-tree.y
Description: Binary data
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