Encode an Array as JSON and send it downstream,

Hint: You can easily turn this Producer' into a Pipe that encodes Array values as JSON as they flow downstream using:

for cat encodeArray :: Monad m => Pipe Array ByteString m r

Encode an Object as JSON and send it downstream,

Hint: You can easily turn this Producer' into a Pipe that encodes Object values as JSON as they flow downstream using:

for cat encodeObject :: Monad m => Pipe Object ByteString m r

Decodes an Object or Array JSON value from the underlying state.

It returns Nothing if the underlying Producer is exhausted, otherwise it returns either the decoded entity or a DecodingError in case of error.

Note: The JSON RFC-4627 standard only allows arrays or objects as top-level entities, which is why this Parser restricts its output to them. If you prefer to ignore the standard and decode any Value, then use decode from the Pipes.Aeson.Unchecked module.

Improper lens that turns a stream of raw JSON input into a stream of FromJSON and back.

By improper lens we mean that in practice you can't expect the Monad Morphism Laws to be true when using decoded with zoom.

zoom decoded (return r) /= return r
zoom decoded (m >>= k)  /= zoom m >>= zoom . f

Note: The JSON RFC-4627 standard only allows arrays or objects as top-level entities, which is why this function restricts its stream values to them. If you prefer to ignore the standard and encode or decode any Value, then use decoded from the Pipes.Aeson.Unchecked module.

Like decode, except it also returns the length of JSON input that was consumed in order to obtain the value, not including the length of whitespace before nor after the parsed JSON input.

Like decoded, except it also tags each decoded entity with the length of JSON input that was consumed in order to obtain the value, not including the length of whitespace between each parsed JSON input.

An error while decoding a JSON value.