lsm_tree/
format_version.rs

1// Copyright (c) 2024-present, fjall-rs
2// This source code is licensed under both the Apache 2.0 and MIT License
3// (found in the LICENSE-* files in the repository)
4
5/// Disk format version
6#[derive(Copy, Clone, Debug, Eq, PartialEq)]
7pub enum FormatVersion {
8    /// Version for 1.x.x releases
9    V1 = 1,
10
11    /// Version for 2.x.x releases
12    V2,
13
14    /// Version for 3.x.x releases
15    V3,
16
17    /// Version for range-tombstone SST semantics
18    V4,
19}
20
21impl std::fmt::Display for FormatVersion {
22    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
23        write!(f, "{}", u8::from(*self))
24    }
25}
26
27impl From<FormatVersion> for u8 {
28    fn from(value: FormatVersion) -> Self {
29        match value {
30            FormatVersion::V1 => 1,
31            FormatVersion::V2 => 2,
32            FormatVersion::V3 => 3,
33            FormatVersion::V4 => 4,
34        }
35    }
36}
37
38impl TryFrom<u8> for FormatVersion {
39    type Error = ();
40
41    fn try_from(value: u8) -> Result<Self, Self::Error> {
42        match value {
43            1 => Ok(Self::V1),
44            2 => Ok(Self::V2),
45            3 => Ok(Self::V3),
46            4 => Ok(Self::V4),
47            _ => Err(()),
48        }
49    }
50}
lsm_tree/format_version.rs

lsm_tree/
format_version.rs
