Enum as separate parser #391

Job	Run time
windows-msvc-shared (AVRO)	7m 0s
windows-msvc-shared (JSON)	10m 16s
windows-msvc-shared (CBOR)	9m 0s
windows-msvc-shared (PARQUET)	40m 42s
windows-msvc-shared (CAPNPROTO)	7m 52s
windows-msvc-shared (TOML)	4m 1s
windows-msvc-shared (FLEXBUFFERS)	3m 41s
windows-msvc-shared (XML)	3m 59s
windows-msvc-shared (YAML)	5m 20s
windows-msvc-shared (MSGPACK)	4m 29s
windows-msvc-shared (UBJSON)	7m 16s
windows-msvc (TOML)	3m 48s
windows-msvc (CBOR)	8m 46s
windows-msvc (UBJSON)	6m 41s
windows-msvc (YAML)	4m 50s
windows-msvc (AVRO)	7m 27s
windows-msvc (benchmarks)	37m 54s
windows-msvc (JSON)	11m 5s
windows-msvc (MSGPACK)	4m 41s
windows-msvc (CAPNPROTO)	8m 16s
windows-msvc (PARQUET)	37m 50s
windows-msvc (FLEXBUFFERS)	4m 37s
windows-msvc (XML)	4m 36s
	4h 4m 7s

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