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  1. import Data.Typeable
  2. main = do
  3.    let x = 42
  4.    putStr(tyConString(typeRepTyCon(typeOf1(42))))
  5.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
[1 of 1] Compiling Main             ( prog.hs, prog.o )

prog.hs:4:43:
    No instance for (Num (t a))
      arising from the literal `42' at prog.hs:4:43-44
    Possible fix: add an instance declaration for (Num (t a))
    In the first argument of `typeOf1', namely `(42)'
    In the first argument of `typeRepTyCon', namely `(typeOf1 (42))'
    In the first argument of `tyConString', namely
        `(typeRepTyCon (typeOf1 (42)))'
stdout
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Standard output is empty
https://ideone.com/uYrAw
language:
Haskell (ghc 8.4.4)
created:
14 years ago
visibility:
public

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