Convert a |readfile()|-style list or a |Blob| to a list of VimL objects. Example: let fname = expand('~/.config/nvim/shada/main.shada') let mpack = readfile(fname, 'b') let shada_objects = msgpackparse(mpack) This will read ~/.config/nvim/shada/main.shada file to shada_objects list. Limitations:

1. Mapping ordering is not preserved unless messagepack mapping is dumped using generic mapping (|msgpack-special-map|).
2. Since the parser aims to preserve all data untouched (except for 1.) some strings are parsed to |msgpack-special-dict| format which is not convenient to use. Some messagepack strings may be parsed to special dictionaries. Special dictionaries are dictionaries which
3. Contain exactly two keys: _TYPE and _VAL.
4. _TYPE key is one of the types found in |v:msgpack_types| variable.
5. Value for _VAL has the following format (Key column contains name of the key from |v:msgpack_types|): Key Value ~ nil Zero, ignored when dumping. Not returned by |msgpackparse()| since |v:null| was introduced. boolean One or zero. When dumping it is only checked that value is a |Number|. Not returned by |msgpackparse()| since |v:true| and |v:false| were introduced. integer |List| with four numbers: sign (-1 or 1), highest two bits, number with bits from 62nd to 31st, lowest 31 bits. I.e. to get actual number one will need to use code like _VAL[0] * ((_VAL[1] << 62) & (_VAL[2] << 31) & _VAL[3]) Special dictionary with this type will appear in |msgpackparse()| output under one of the following circumstances:
   1. |Number| is 32-bit and value is either above INT32_MAX or below INT32_MIN.
   2. |Number| is 64-bit and value is above INT64_MAX. It cannot possibly be below INT64_MIN because msgpack C parser does not support such values. float |Float|. This value cannot possibly appear in |msgpackparse()| output. string |readfile()|-style list of strings. This value will appear in |msgpackparse()| output if string contains zero byte or if string is a mapping key and mapping is being represented as special dictionary for other reasons. binary |String|, or |Blob| if binary string contains zero byte. This value cannot appear in |msgpackparse()| output since blobs were introduced. array |List|. This value cannot appear in |msgpackparse()| output. map |List| of |List|s with two items (key and value) each. This value will appear in |msgpackparse()| output if parsed mapping contains one of the following keys:
   3. Any key that is not a string (including keys which are binary strings).
   4. String with NUL byte inside.
   5. Duplicate key.
   6. Empty key. ext |List| with two values: first is a signed integer representing extension type. Second is |readfile()|-style list of strings.