nim-eth/eth/rlp/options.nim

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import
std/options,
../rlp
proc read*[T](rlp: var Rlp, O: type Option[T]): O {.inline.} =
mixin read
if not rlp.isEmpty:
result = some read(rlp, T)
proc append*(writer: var RlpWriter, value: Option) =
if value.isSome:
writer.append value.get
else:
writer.append ""
export
options, rlp