summaryrefslogtreecommitdiffstats
path: root/src/test/ui/impl-trait/example-st.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/test/ui/impl-trait/example-st.rs')
-rw-r--r--src/test/ui/impl-trait/example-st.rs30
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));
-}