radicle 0.24.0

Radicle standard library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

//! Stores carry [`Access`] to indicate allowed access modes. In particular
//! whether writes to the store are allowed.

pub use seal::Access;

/// [`ReadOnly`] is used for read-only [`Access`].
pub struct ReadOnly;

/// [`WriteAs`] is used for write [`Access`].
pub struct WriteAs<'a, Signer> {
    pub(super) signer: &'a Signer,
}

impl<'a, Signer> WriteAs<'a, Signer> {
    pub fn new(signer: &'a Signer) -> Self {
        Self { signer }
    }
}

// See <https://predr.ag/blog/definitive-guide-to-sealed-traits-in-rust/#sealing-traits-via-method-signatures>.
#[allow(private_interfaces)]
mod seal {
    enum Seal {}

    /// Marker trait for COB store access modes.
    pub trait Access {
        fn seal(&self, _: Seal);
    }

    impl Access for super::ReadOnly {
        fn seal(&self, _: Seal) {}
    }

    impl<Signer> Access for super::WriteAs<'_, Signer> {
        fn seal(&self, _: Seal) {}
    }
}