[Haskell-cafe] instance for (Show ([(String, Int)] -> Int))

How do I code an 'instance' declaration for '(Show ([(String, Int)] -> Int))'. I am new to instance declarations and am following the Happy examples :- http://www.haskell.org/happy/doc/html/sec-using.html#sec-other-datatypes 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 Many thanks in advance, Aaron