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authorHampusM <hampus@hampusmat.com>2022-07-27 14:43:51 +0200
committerHampusM <hampus@hampusmat.com>2022-07-27 14:43:51 +0200
commit224e59112e65ce6cbafe5a87dba031dd11e936a8 (patch)
treee07fe689f2e1fa50d205eb5e984f474007374da4 /src/libs/intertrait/cast/arc.rs
parent26667cddb857a21522b49b5ac83228b2a72a353a (diff)
refactor: add back Intertrait tests & Rc support
Diffstat (limited to 'src/libs/intertrait/cast/arc.rs')
-rw-r--r--src/libs/intertrait/cast/arc.rs32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/libs/intertrait/cast/arc.rs b/src/libs/intertrait/cast/arc.rs
new file mode 100644
index 0000000..4099ae7
--- /dev/null
+++ b/src/libs/intertrait/cast/arc.rs
@@ -0,0 +1,32 @@
+//! Originally from Intertrait by CodeChain
+//!
+//! <https://github.com/CodeChain-io/intertrait>
+//! <https://crates.io/crates/intertrait/0.2.2>
+//!
+//! Licensed under either of
+//!
+//! Apache License, Version 2.0 (LICENSE-APACHE or <http://www.apache.org/licenses/LICENSE-2.0>)
+//! MIT license (LICENSE-MIT or <http://opensource.org/licenses/MIT>)
+//!
+//! at your option.
+use std::sync::Arc;
+
+use crate::libs::intertrait::{caster, CastFromSync};
+
+pub trait CastArc
+{
+ /// Casts an `Arc` for this trait into that for type `T`.
+ fn cast<T: ?Sized + 'static>(self: Arc<Self>) -> Result<Arc<T>, Arc<Self>>;
+}
+
+/// A blanket implementation of `CastArc` for traits extending `CastFrom`, `Sync`, and `Send`.
+impl<S: ?Sized + CastFromSync> CastArc for S
+{
+ fn cast<T: ?Sized + 'static>(self: Arc<Self>) -> Result<Arc<T>, Arc<Self>>
+ {
+ match caster::<T>((*self).type_id()) {
+ Some(caster) => Ok((caster.cast_arc)(self.arc_any())),
+ None => Err(self),
+ }
+ }
+}