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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromBounded = enumerateFromTo from maxBound
enumerateFrom for Bounded Enum types. -
streamly Streamly.Internal.Data.Stream.IsStream Numerically stable enumeration from a Fractional number in steps of size 1. enumerateFromFractional from generates a stream whose first element is from and the successive elements are in increments of 1. No overflow or underflow checks are performed. This is the equivalent to enumFrom for Fractional types. For example:
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromFractional 1.1 [1.1,2.1,3.1,4.1]
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streamly Streamly.Internal.Data.Stream.IsStream Enumerate an Integral type. enumerateFromIntegral from generates a stream whose first element is from and the successive elements are in increments of 1. The stream is bounded by the size of the Integral type.
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromIntegral (0 :: Int) [0,1,2,3]
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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromStepIntegral from step generates an infinite stream whose first element is from and the successive elements are in increments of step. CAUTION: This function is not safe for finite integral types. It does not check for overflow, underflow or bounds.
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromStepIntegral 0 2 [0,2,4,6] >>> Stream.toList $ Stream.take 3 $ Stream.enumerateFromStepIntegral 0 (-2) [0,-2,-4]
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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromThen from then generates a stream whose first element is from, the second element is then and the successive elements are in increments of then - from. Enumeration can occur downwards or upwards depending on whether then comes before or after from. For Bounded types the stream ends when maxBound is reached, for unbounded types it keeps enumerating infinitely.
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThen 0 2 [0,2,4,6] >>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThen 0 (-2) [0,-2,-4,-6]
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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromThen from then generates a stream whose first element is from, the second element is then and the successive elements are in increments of then - from. Enumeration can occur downwards or upwards depending on whether then comes before or after from. For Bounded types the stream ends when maxBound is reached, for unbounded types it keeps enumerating infinitely.
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThen 0 2 [0,2,4,6] >>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThen 0 (-2) [0,-2,-4,-6]
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streamly Streamly.Internal.Data.Stream.IsStream Numerically stable enumeration from a Fractional number in steps. enumerateFromThenFractional from then generates a stream whose first element is from, the second element is then and the successive elements are in increments of then - from. No overflow or underflow checks are performed. This is the equivalent of enumFromThen for Fractional types. For example:
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThenFractional 1.1 2.1 [1.1,2.1,3.1,4.1] >>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThenFractional 1.1 (-2.1) [1.1,-2.1,-5.300000000000001,-8.500000000000002]
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streamly Streamly.Internal.Data.Stream.IsStream Enumerate an Integral type in steps. enumerateFromThenIntegral from then generates a stream whose first element is from, the second element is then and the successive elements are in increments of then - from. The stream is bounded by the size of the Integral type.
>>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThenIntegral (0 :: Int) 2 [0,2,4,6] >>> Stream.toList $ Stream.take 4 $ Stream.enumerateFromThenIntegral (0 :: Int) (-2) [0,-2,-4,-6]
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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromThen for Enum types not larger than Int. Note: We convert the Enum to Int and enumerate the Int. If a type is bounded but does not have a Bounded instance then we can go on enumerating it beyond the legal values of the type, resulting in the failure of toEnum when converting back to Enum. Therefore we require a Bounded instance for this function to be safely used.
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streamly Streamly.Internal.Data.Stream.IsStream enumerateFromThenTo from then to generates a finite stream whose first element is from, the second element is then and the successive elements are in increments of then - from up to to. Enumeration can occur downwards or upwards depending on whether then comes before or after from.
>>> Stream.toList $ Stream.enumerateFromThenTo 0 2 6 [0,2,4,6] >>> Stream.toList $ Stream.enumerateFromThenTo 0 (-2) (-6) [0,-2,-4,-6]