src/test/run-pass/ufcs-polymorphic-paths.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // pretty-expanded FIXME #23616
  12
  13 #![feature(collections, rand, into_cow)]
  14
  15 use std::borrow::{Cow, IntoCow};
  16 use std::collections::BitVec;
  17 use std::default::Default;
  18 use std::iter::FromIterator;
  19 use std::ops::Add;
  20 use std::option::IntoIter as OptionIter;
  21 use std::rand::Rand;
  22 use std::rand::XorShiftRng as DummyRng;
  23 // FIXME the glob std::prelude::*; import of Vec is missing non-static inherent methods.
  24 use std::vec::Vec;
  25
  26 #[derive(PartialEq, Eq)]
  27 struct Newt<T>(T);
  28
  29 fn id<T>(x: T) -> T { x }
  30 fn eq<T: Eq>(a: T, b: T) -> bool { a == b }
  31 fn u8_as_i8(x: u8) -> i8 { x as i8 }
  32 fn odd(x: usize) -> bool { x % 2 == 1 }
  33 fn dummy_rng() -> DummyRng { DummyRng::new_unseeded() }
  34
  35 trait Size: Sized {
  36     fn size() -> usize { std::mem::size_of::<Self>() }
  37 }
  38 impl<T> Size for T {}
  39
  40 macro_rules! tests {
  41     ($($expr:expr, $ty:ty, ($($test:expr),*);)+) => (pub fn main() {$({
  42         const C: $ty = $expr;
  43         static S: $ty = $expr;
  44         assert!(eq(C($($test),*), $expr($($test),*)));
  45         assert!(eq(S($($test),*), $expr($($test),*)));
  46         assert!(eq(C($($test),*), S($($test),*)));
  47     })+})
  48 }
  49
  50 tests! {
  51     // Free function.
  52     id, fn(i32) -> i32, (5);
  53     id::<i32>, fn(i32) -> i32, (5);
  54
  55     // Enum variant constructor.
  56     Some, fn(i32) -> Option<i32>, (5);
  57     Some::<i32>, fn(i32) -> Option<i32>, (5);
  58
  59     // Tuple struct constructor.
  60     Newt, fn(i32) -> Newt<i32>, (5);
  61     Newt::<i32>, fn(i32) -> Newt<i32>, (5);
  62
  63     // Inherent static methods.
  64     Vec::new, fn() -> Vec<()>, ();
  65     Vec::<()>::new, fn() -> Vec<()>, ();
  66     <Vec<()>>::new, fn() -> Vec<()>, ();
  67     Vec::with_capacity, fn(usize) -> Vec<()>, (5);
  68     Vec::<()>::with_capacity, fn(usize) -> Vec<()>, (5);
  69     <Vec<()>>::with_capacity, fn(usize) -> Vec<()>, (5);
  70     BitVec::from_fn, fn(usize, fn(usize) -> bool) -> BitVec, (5, odd);
  71     BitVec::from_fn::<fn(usize) -> bool>, fn(usize, fn(usize) -> bool) -> BitVec, (5, odd);
  72
  73     // Inherent non-static method.
  74     Vec::map_in_place, fn(Vec<u8>, fn(u8) -> i8) -> Vec<i8>, (vec![b'f', b'o', b'o'], u8_as_i8);
  75     Vec::map_in_place::<i8, fn(u8) -> i8>, fn(Vec<u8>, fn(u8) -> i8) -> Vec<i8>,
  76         (vec![b'f', b'o', b'o'], u8_as_i8);
  77     // FIXME these break with "type parameter might not appear here pointing at `<u8>`.
  78     // Vec::<u8>::map_in_place: fn(Vec<u8>, fn(u8) -> i8) -> Vec<i8>
  79     //    , (vec![b'f', b'o', b'o'], u8_as_i8);
  80     // Vec::<u8>::map_in_place::<i8, fn(u8) -> i8>: fn(Vec<u8>, fn(u8) -> i8) -> Vec<i8>
  81     //    , (vec![b'f', b'o', b'o'], u8_as_i8);
  82
  83     // Trait static methods.
  84     bool::size, fn() -> usize, ();
  85     <bool>::size, fn() -> usize, ();
  86     <bool as Size>::size, fn() -> usize, ();
  87
  88     Default::default, fn() -> i32, ();
  89     i32::default, fn() -> i32, ();
  90     <i32>::default, fn() -> i32, ();
  91     <i32 as Default>::default, fn() -> i32, ();
  92
  93     Rand::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  94     i32::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  95     <i32>::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  96     <i32 as Rand>::rand, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  97     Rand::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  98     i32::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
  99     <i32>::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
 100     <i32 as Rand>::rand::<DummyRng>, fn(&mut DummyRng) -> i32, (&mut dummy_rng());
 101
 102     // Trait non-static methods.
 103     Clone::clone, fn(&i32) -> i32, (&5);
 104     i32::clone, fn(&i32) -> i32, (&5);
 105     <i32>::clone, fn(&i32) -> i32, (&5);
 106     <i32 as Clone>::clone, fn(&i32) -> i32, (&5);
 107
 108     FromIterator::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
 109     Vec::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
 110     <Vec<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>, (Some(5).into_iter());
 111     <Vec<_> as FromIterator<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>,
 112         (Some(5).into_iter());
 113     <Vec<i32> as FromIterator<_>>::from_iter, fn(OptionIter<i32>) -> Vec<i32>,
 114         (Some(5).into_iter());
 115     FromIterator::from_iter::<OptionIter<i32>>, fn(OptionIter<i32>) -> Vec<i32>,
 116         (Some(5).into_iter());
 117     <Vec<i32> as FromIterator<_>>::from_iter::<OptionIter<i32>>, fn(OptionIter<i32>) -> Vec<i32>,
 118         (Some(5).into_iter());
 119
 120     Add::add, fn(i32, i32) -> i32, (5, 6);
 121     i32::add, fn(i32, i32) -> i32, (5, 6);
 122     <i32>::add, fn(i32, i32) -> i32, (5, 6);
 123     <i32 as Add<_>>::add, fn(i32, i32) -> i32, (5, 6);
 124     <i32 as Add<i32>>::add, fn(i32, i32) -> i32, (5, 6);
 125
 126     String::into_cow, fn(String) -> Cow<'static, str>,
 127         ("foo".to_string());
 128     <String>::into_cow, fn(String) -> Cow<'static, str>,
 129         ("foo".to_string());
 130     <String as IntoCow<_>>::into_cow, fn(String) -> Cow<'static, str>,
 131         ("foo".to_string());
 132     <String as IntoCow<'static, _>>::into_cow, fn(String) -> Cow<'static, str>,
 133         ("foo".to_string());
 134 }