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authorHampusM <hampus@hampusmat.com>2022-07-20 14:29:45 +0200
committerHampusM <hampus@hampusmat.com>2022-07-20 14:29:45 +0200
commit2d1a6b2d432408d74eb57e0bda3f7434617e1070 (patch)
tree7e21f8126edfdfd9c40b4b51ba5626c6440442d9 /src/libs/intertrait/cast_rc.rs
parent7863d9859a5cbce99c3769e4fdb40283115d358d (diff)
refactor: reorganize folder hierarchy
Diffstat (limited to 'src/libs/intertrait/cast_rc.rs')
-rw-r--r--src/libs/intertrait/cast_rc.rs34
1 files changed, 34 insertions, 0 deletions
diff --git a/src/libs/intertrait/cast_rc.rs b/src/libs/intertrait/cast_rc.rs
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+++ b/src/libs/intertrait/cast_rc.rs
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+/**
+ * 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::rc::Rc;
+
+use crate::libs::intertrait::{caster, CastFrom};
+
+pub trait CastRc
+{
+ /// Casts an `Rc` for this trait into that for type `T`.
+ fn cast<T: ?Sized + 'static>(self: Rc<Self>) -> Result<Rc<T>, Rc<Self>>;
+}
+
+/// A blanket implementation of `CastRc` for traits extending `CastFrom`.
+impl<S: ?Sized + CastFrom> CastRc for S
+{
+ fn cast<T: ?Sized + 'static>(self: Rc<Self>) -> Result<Rc<T>, Rc<Self>>
+ {
+ match caster::<T>((*self).type_id()) {
+ Some(caster) => Ok((caster.cast_rc)(self.rc_any())),
+ None => Err(self),
+ }
+ }
+}