1 files changed, 154 insertions, 0 deletions
diff --git a/tests/ui/ufcs/ufcs-polymorphic-paths.rs b/tests/ui/ufcs/ufcs-polymorphic-paths.rs
new file mode 100644
index 000000000..a14ebd6a4
--- /dev/null
+++ b/tests/ui/ufcs/ufcs-polymorphic-paths.rs
@@ -0,0 +1,154 @@
+// run-pass
+
+use std::borrow::{Cow, ToOwned};
+use std::default::Default;
+use std::iter::FromIterator;
+use std::ops::Add;
+use std::option::IntoIter as OptionIter;
+
+pub struct XorShiftRng;
+use XorShiftRng as DummyRng;
+impl Rng for XorShiftRng {}
+pub trait Rng {}
+pub trait Rand: Default + Sized {
+    fn rand<R: Rng>(_rng: &mut R) -> Self { Default::default() }
+}
+impl Rand for i32 { }
+
+pub trait IntoCow<'a, B: ?Sized> where B: ToOwned {
+    fn into_cow(self) -> Cow<'a, B>;
+}
+
+impl<'a> IntoCow<'a, str> for String {
+    fn into_cow(self) -> Cow<'a, str> {
+        Cow::Owned(self)
+    }
+}
+
+#[derive(PartialEq, Eq)]
+struct Newt<T>(T);
+
+fn id<T>(x: T) -> T { x }
+fn eq<T: Eq>(a: T, b: T) -> bool { a == b }
+fn u8_as_i8(x: u8) -> i8 { x as i8 }
+fn odd(x: usize) -> bool { x % 2 == 1 }
+fn dummy_rng() -> DummyRng { XorShiftRng }
+
+trait Size: Sized {
+    fn size() -> usize { std::mem::size_of::<Self>() }
+}
+impl<T> Size for T {}
+
+#[derive(PartialEq, Eq)]
+struct BitVec;
+
+impl BitVec {
+    fn from_fn<F>(_: usize, _: F) -> BitVec where F: FnMut(usize) -> bool {
+        BitVec
+    }
+}
+
+#[derive(PartialEq, Eq)]
+struct Foo<T>(T);
+
+impl<T> Foo<T> {
+    fn map_in_place<U, F>(self, mut f: F) -> Foo<U> where F: FnMut(T) -> U {
+        Foo(f(self.0))
+    }
+
+}
+
+macro_rules! tests {
+    ($($expr:expr, $ty:ty, ($($test:expr),*);)+) => (pub fn main() {$({
+        const C: $ty = $expr;
+        static S: $ty = $expr;
+        assert!(eq(C($($test),*), $expr($($test),*)));
+        assert!(eq(S($($test),*), $expr($($test),*)));
+        assert!(eq(C($($test),*), S($($test),*)));
+    })+})
+}
+
+tests! {
+    // Free function.
+    id, fn(i32) -> i32, (5);
+    id::<i32>, fn(i32) -> i32, (5);
+
+    // Enum variant constructor.
+    Some, fn(i32) -> Option<i32>, (5);
+    Some::<i32>, fn(i32) -> Option<i32>, (5);
+
+    // Tuple struct constructor.
+    Newt, fn(i32) -> Newt<i32>, (5);
+    Newt::<i32>, fn(i32) -> Newt<i32>, (5);
+
+    // Inherent static methods.
+    Vec::new, fn() -> Vec<()>, ();
+    Vec::<()>::new, fn() -> Vec<()>, ();
+    <Vec<()>>::new, fn() -> Vec<()>, ();
+    Vec::with_capacity, fn(usize) -> Vec<()>, (5);
+    Vec::<()>::with_capacity, fn(usize) -> Vec<()>, (5);
+    <Vec<()>>::with_capacity, fn(usize) -> Vec<()>, (5);
+    BitVec::from_fn, fn(usize, fn(usize) -> bool) -> BitVec, (5, odd);
+    BitVec::from_fn::<fn(usize) -> bool>, fn(usize, fn(usize) -> bool) -> BitVec, (5, odd);
+
+    // Inherent non-static method.
+    Foo::map_in_place, fn(Foo<u8>, fn(u8) -> i8) -> Foo<i8>, (Foo(b'f'), u8_as_i8);
+    Foo::map_in_place::<i8, fn(u8) -> i8>, fn(Foo<u8>, fn(u8) -> i8) -> Foo<i8>,
+        (Foo(b'f'), u8_as_i8);
+    Foo::<u8>::map_in_place, fn(Foo<u8>, fn(u8) -> i8) -> Foo<i8>
+        , (Foo(b'f'), u8_as_i8);
+    Foo::<u8>::map_in_place::<i8, fn(u8) -> i8>, fn(Foo<u8>, fn(u8) -> i8) -> Foo<i8>
+        , (Foo(b'f'), u8_as_i8);
+
+    // Trait static methods.
+    bool::size, fn() -> usize, ();
+    <bool>::size, fn() -> usize, ();
+    <bool as Size>::size, fn() -> usize, ();
+
+    Default::default, fn() -> i32, ();
+    i32::default, fn() -> i32, ();
+    <i32>::default, fn() -> i32, ();
+    <i32 as Default>::default, fn() -> i32, ();
+
+    Rand::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    i32::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    <i32>::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    <i32 as Rand>::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    Rand::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    i32::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    <i32>::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+    <i32 as Rand>::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
+
+    // Trait non-static methods.
+    Clone::clone, fn(&i32) -> i32, (&5);
+    i32::clone, fn(&i32) -> i32, (&5);
+    <i32>::clone, fn(&i32) -> i32, (&5);
+    <i32 as Clone>::clone, fn(&i32) -> i32, (&5);
+
+    FromIterator::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
+    Vec::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
+    <Vec<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
+    <Vec<_> as FromIterator<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>,
+        (Some(5).into_iter());
+    <Vec<i32> as FromIterator<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>,
+        (Some(5).into_iter());
+    FromIterator::from_iter::<OptionIter<i32>>, fn(OptionIter<i32>) -> Vec<i32>,
+        (Some(5).into_iter());
+    <Vec<i32> as FromIterator<_>>::from_iter::<OptionIter<i32>>, fn(OptionIter<i32>) -> Vec<i32>,
+        (Some(5).into_iter());
+
+    Add::add, fn(i32, i32) -> i32, (5, 6);
+    i32::add, fn(i32, i32) -> i32, (5, 6);
+    <i32>::add, fn(i32, i32) -> i32, (5, 6);
+    <i32 as Add<_>>::add, fn(i32, i32) -> i32, (5, 6);
+    <i32 as Add<i32>>::add, fn(i32, i32) -> i32, (5, 6);
+
+    String::into_cow, fn(String) -> Cow<'static, str>,
+        ("foo".to_string());
+    <String>::into_cow, fn(String) -> Cow<'static, str>,
+        ("foo".to_string());
+    <String as IntoCow<_>>::into_cow, fn(String) -> Cow<'static, str>,
+        ("foo".to_string());
+    <String as IntoCow<'static, _>>::into_cow, fn(String) -> Cow<'static, str>,
+        ("foo".to_string());
+}