safecast

Crates.iosafecast
lib.rssafecast
created_at2021-01-04 20:01:32.637307
updated_at2023-12-20 05:29:54.418977
descriptionTraits to define safe casting between types
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repositoryhttps://github.com/haydnv/safecast.git
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id331786
Haydn Vestal

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# safecast Rust traits to define safe casting between types. Example usage: ```rust use safecast::*; struct Foo { a: i32, } struct Bar { b: u16, } enum Baz { Foo(Foo), Bar(Bar), } impl CastFrom for Foo { fn cast_from(bar: Bar) -> Self { Foo { a: bar.b as i32 } } } impl TryCastFrom for Bar { fn can_cast_from(foo: &Foo) -> bool { foo.a >= 0 && foo.a <= u16::MAX } fn opt_cast_from(foo: Foo) -> Option { if foo.a >= 0 && foo.a <= u16::MAX { Some(Self { b: foo.a as u16 }) } else { None } } } impl AsType for Baz { fn as_type(&self) -> Option<&Foo> { match self { Self::Foo(foo) => Some(foo), _ => None, } } fn as_type_mut(&mut self) -> Option<&mut Foo> { match self { Self::Foo(foo) => Some(foo), _ => None, } } fn into_type(self) -> Option { match self { Self::Foo(foo) => Some(foo), _ => None, } } } ```
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