diff options
Diffstat (limited to 'src/test/ui/never_type/try_from.rs')
-rw-r--r-- | src/test/ui/never_type/try_from.rs | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/src/test/ui/never_type/try_from.rs b/src/test/ui/never_type/try_from.rs deleted file mode 100644 index 50451576f..000000000 --- a/src/test/ui/never_type/try_from.rs +++ /dev/null @@ -1,37 +0,0 @@ -// run-pass -// This test relies on `TryFrom` being blanket impl for all `T: Into` -// and `TryInto` being blanket impl for all `U: TryFrom` - -// This test was added to show the motivation for doing this -// over `TryFrom` being blanket impl for all `T: From` - -#![feature(never_type)] - -use std::convert::{TryInto, Infallible}; - -struct Foo<T> { - t: T, -} - -// This fails to compile due to coherence restrictions -// as of Rust version 1.32.x, therefore it could not be used -// instead of the `Into` version of the impl, and serves as -// motivation for a blanket impl for all `T: Into`, instead -// of a blanket impl for all `T: From` -/* -impl<T> From<Foo<T>> for Box<T> { - fn from(foo: Foo<T>) -> Box<T> { - Box::new(foo.t) - } -} -*/ - -impl<T> Into<Vec<T>> for Foo<T> { - fn into(self) -> Vec<T> { - vec![self.t] - } -} - -pub fn main() { - let _: Result<Vec<i32>, Infallible> = Foo { t: 10 }.try_into(); -} |