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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/ufcs-polymorphic-paths.rs | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/test/ui/ufcs-polymorphic-paths.rs b/src/test/ui/ufcs-polymorphic-paths.rs new file mode 100644 index 000000000..a14ebd6a4 --- /dev/null +++ b/src/test/ui/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()); +} |