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Diffstat (limited to 'src/private/cast/arc.rs')
-rw-r--r-- | src/private/cast/arc.rs | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/src/private/cast/arc.rs b/src/private/cast/arc.rs deleted file mode 100644 index 1fbdf8b..0000000 --- a/src/private/cast/arc.rs +++ /dev/null @@ -1,93 +0,0 @@ -//! 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::any::type_name; -use std::sync::Arc; - -use crate::private::cast::error::CastError; -use crate::private::cast::{get_caster, CastFromArc}; - -pub trait CastArc -{ - /// Casts an `Arc` with `Self` into an `Arc` with `Dest`. - fn cast<Dest: ?Sized + 'static>(self: Arc<Self>) -> Result<Arc<Dest>, CastError>; -} - -/// A blanket implementation of `CastArc` for traits extending `CastFrom`, `Sync`, and -/// `Send`. -impl<CastFromSelf: ?Sized + CastFromArc> CastArc for CastFromSelf -{ - fn cast<Dest: ?Sized + 'static>(self: Arc<Self>) -> Result<Arc<Dest>, CastError> - { - let caster = - get_caster::<Dest>((*self).type_id()).map_err(CastError::GetCasterFailed)?; - - let cast_arc = caster - .opt_cast_arc - .ok_or(CastError::NotArcCastable(type_name::<Dest>()))?; - - cast_arc(self.arc_any()).map_err(|err| CastError::CastFailed { - source: err, - from: type_name::<Self>(), - to: type_name::<Dest>(), - }) - } -} - -#[cfg(test)] -mod tests -{ - use std::any::Any; - use std::fmt::{Debug, Display}; - use std::sync::Arc; - - use super::*; - use crate::test_utils::subjects; - - #[test] - fn can_cast_arc() - { - let concrete_ninja = Arc::new(subjects::Ninja); - - let abstract_ninja: Arc<dyn subjects::INinja> = concrete_ninja; - - let debug_ninja_result = abstract_ninja.cast::<dyn Debug>(); - - assert!(debug_ninja_result.is_ok()); - } - - #[test] - fn cannot_cast_arc_wrong() - { - let concrete_ninja = Arc::new(subjects::Ninja); - - let abstract_ninja: Arc<dyn subjects::INinja> = concrete_ninja; - - let display_ninja_result = abstract_ninja.cast::<dyn Display>(); - - assert!(matches!( - display_ninja_result, - Err(CastError::GetCasterFailed(_)) - )); - } - - #[test] - fn can_cast_arc_from_any() - { - let concrete_ninja = Arc::new(subjects::Ninja); - - let any_ninja: Arc<dyn Any + Send + Sync> = concrete_ninja; - - let debug_ninja_result = any_ninja.cast::<dyn Debug>(); - - assert!(debug_ninja_result.is_ok()); - } -} |