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//@ run-pass
use std::borrow::Cow;
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());
}
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