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definition:
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mGetLine :: IO (Maybe String)
mGetLine = do
eof <- isEOF
if eof
then return Nothing
else do
c <- getChar
if ord c == 0 -- indices EOF in Curry2Go
then return Nothing
else if c == '\n'
then return $ Just []
else do mGetLine >>= maybe (return Nothing)
(\cs -> return $ Just (c:cs))
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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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-- A variant of `Prelude.getLine` which returns `Nothing` if EOF is reached.
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failfree:
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()
|
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indeterministic:
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referentially transparent operation
|
|
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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mGetLine
|
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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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Prelude.IO (Prelude.Maybe 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:
|
reducible on all ground data terms
|