ByteDurableDb.value_length: def of mylsm-lsm-store@0.6.0.1
Import: import mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend as ByteDurableDb
Lines 1536-1550 of mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend: https://jend.leeeet.dev/read.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&start_line=1536&end_line=1550

import Base
import mylsm-lsm-store@0.6.0.1/src/ByteMemTable.bend as ByteMemTable
import bend-kit-bytes@0.3.2.0/bytes.bend as Bytes

# Handles value length.
def value_length(
  handle: Handle,
  key: Bytes.Bytes
) -> IO(Handle & Result<&1, &1, Error, Maybe<&1, U32>>):
  match handle:
    case Handle{path, lock, table, Open{}, base_stats}:
      do IO<Handle & Result<&1, &1, Error, Maybe<&1, U32>>>:
        measured : Handle & Result<&1, &1, Error, Maybe<&1, U32>> <-
          get.length.delta(path, lock, ByteMemTable.bytes.clone(key), table)
        return value_length.preserve(base_stats, measured)
    case Handle{path, lock, table, Poisoned{}, base_stats}:
      IO.pure(Handle & Result<&1, &1, Error, Maybe<&1, U32>>,
        (Handle{path, lock, table, Poisoned{}, base_stats},
          Fail{CommitUnknown{0, "database handle requires reopen"}}))

Uses (15):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&name=Handle
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&name=HandleState
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&name=get.length.delta
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteDurableDb.bend&name=value_length.preserve
  https://jend.leeeet.dev/definition.txt?path=mylsm-lsm-store@0.6.0.1/src/ByteMemTable.bend&name=bytes.clone