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,
10
11    /// Version for 2.x.x releases
12    V2,
13
14    /// Version for 3.x.x releases
15    V3,
16}
17
18#[cfg_attr(test, mutants::skip)]
19impl std::fmt::Display for FormatVersion {
20    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
21        write!(f, "{}", u8::from(*self))
22    }
23}
24
25impl From<FormatVersion> for u8 {
26    fn from(value: FormatVersion) -> Self {
27        match value {
28            FormatVersion::V1 => 1,
29            FormatVersion::V2 => 2,
30            FormatVersion::V3 => 3,
31        }
32    }
33}
34
35impl TryFrom<u8> for FormatVersion {
36    type Error = ();
37
38    fn try_from(value: u8) -> Result<Self, Self::Error> {
39        match value {
40            1 => Ok(Self::V1),
41            2 => Ok(Self::V2),
42            3 => Ok(Self::V3),
43            _ => Err(()),
44        }
45    }
46}
lsm_tree/format_version.rs

lsm_tree/
format_version.rs
