comparison rust/hg-core/src/dirstate/entry.rs @ 48026:1b2ee68e85f9

rust: Remove EntryState::Unknown

This enum variant represented the `state == '?'` case, which was used
to represent the absence of a dirstate entry/item (and therefore of that
entry’s state).

Now that previous refactors have removed this use in the Python/Rust
FFI APIs, the remaining uses can be removed by replacing `EntryState`
by `Option<EntryState>` where appropriate, using `None` to represent
the absence of an entry.

Differential Revision: https://phab.mercurial-scm.org/D11465

48025:631f6b445a77

pub enum EntryState {
    Normal,
    Added,
    Removed,
    Merged,
    Unknown,
}

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.

impl EntryState {
    pub fn is_tracked(self) -> bool {
        use EntryState::*;
        match self {
            Normal | Added | Merged => true,
            Removed | Unknown => false,
        }
    }
}

impl TryFrom<u8> for EntryState {

        match value {
            b'n' => Ok(EntryState::Normal),
            b'a' => Ok(EntryState::Added),
            b'r' => Ok(EntryState::Removed),
            b'm' => Ok(EntryState::Merged),
            b'?' => Ok(EntryState::Unknown),
            _ => Err(HgError::CorruptedRepository(format!(
                "Incorrect dirstate entry state {}",
                value
            ))),
        }

        match self {
            EntryState::Normal => b'n',
            EntryState::Added => b'a',
            EntryState::Removed => b'r',
            EntryState::Merged => b'm',
            EntryState::Unknown => b'?',
        }
    }
}

48026:1b2ee68e85f9

pub enum EntryState {
    Normal,
    Added,
    Removed,
    Merged,
}

/// The C implementation uses all signed types. This will be an issue
/// either when 4GB+ source files are commonplace or in 2038, whichever
/// comes first.

impl EntryState {
    pub fn is_tracked(self) -> bool {
        use EntryState::*;
        match self {
            Normal | Added | Merged => true,
            Removed => false,
        }
    }
}

impl TryFrom<u8> for EntryState {

        match value {
            b'n' => Ok(EntryState::Normal),
            b'a' => Ok(EntryState::Added),
            b'r' => Ok(EntryState::Removed),
            b'm' => Ok(EntryState::Merged),
            _ => Err(HgError::CorruptedRepository(format!(
                "Incorrect dirstate entry state {}",
                value
            ))),
        }

        match self {
            EntryState::Normal => b'n',
            EntryState::Added => b'a',
            EntryState::Removed => b'r',
            EntryState::Merged => b'm',
        }
    }
}