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definition:
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askYesNo :: String -> IO String
askYesNo question = do
putStr question
hFlush stdout
answer <- fmap (map toLower) getLine
if null answer
then return answer
else if answer `isPrefixOf` "yes"
then return "yes"
else if answer `isPrefixOf` "no"
then return "no"
else askYesNo question -- again
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demand:
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no demanded arguments
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deterministic:
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deterministic operation
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documentation:
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-- Ask a question and return the answer which must be empty, `yes`, or `no`.
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failfree:
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_
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indeterministic:
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referentially transparent operation
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infix:
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no fixity defined
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iotype:
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{(_) |-> _}
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name:
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askYesNo
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precedence:
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no precedence defined
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result-values:
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_
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signature:
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String -> Prelude.IO String
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solution-complete:
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operation might suspend on free variables
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terminating:
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possibly non-terminating
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totally-defined:
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possibly non-reducible on same data term
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