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Diffstat (limited to 'src/test/ui/impl-trait/example-st.rs')
-rw-r--r-- | src/test/ui/impl-trait/example-st.rs | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/src/test/ui/impl-trait/example-st.rs b/src/test/ui/impl-trait/example-st.rs deleted file mode 100644 index 4e1aa3a08..000000000 --- a/src/test/ui/impl-trait/example-st.rs +++ /dev/null @@ -1,30 +0,0 @@ -// run-pass - -struct State; -type Error = (); - -trait Bind<F> { - type Output; - fn bind(self, f: F) -> Self::Output; -} - -fn bind<T, U, A, B, F>(mut a: A, mut f: F) - -> impl FnMut(&mut State) -> Result<U, Error> -where F: FnMut(T) -> B, - A: FnMut(&mut State) -> Result<T, Error>, - B: FnMut(&mut State) -> Result<U, Error> -{ - move |state | { - let r = a(state)?; - f(r)(state) - } -} - -fn atom<T>(x: T) -> impl FnMut(&mut State) -> Result<T, Error> { - let mut x = Some(x); - move |_| x.take().map_or(Err(()), Ok) -} - -fn main() { - assert_eq!(bind(atom(5), |x| atom(x > 4))(&mut State), Ok(true)); -} |