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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/structs-enums/class-impl-very-parameterized-trait.rs | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/test/ui/structs-enums/class-impl-very-parameterized-trait.rs b/src/test/ui/structs-enums/class-impl-very-parameterized-trait.rs new file mode 100644 index 000000000..5e7830296 --- /dev/null +++ b/src/test/ui/structs-enums/class-impl-very-parameterized-trait.rs @@ -0,0 +1,107 @@ +// run-pass +#![allow(dead_code)] +#![allow(non_camel_case_types)] + +use std::cmp; + +#[derive(Copy, Clone, Debug)] +enum cat_type { tuxedo, tabby, tortoiseshell } + +impl cmp::PartialEq for cat_type { + fn eq(&self, other: &cat_type) -> bool { + ((*self) as usize) == ((*other) as usize) + } + fn ne(&self, other: &cat_type) -> bool { !(*self).eq(other) } +} + +// Very silly -- this just returns the value of the name field +// for any isize value that's less than the meows field + +// ok: T should be in scope when resolving the trait ref for map +struct cat<T> { + // Yes, you can have negative meows + meows : isize, + + how_hungry : isize, + name : T, +} + +impl<T> cat<T> { + pub fn speak(&mut self) { self.meow(); } + + pub fn eat(&mut self) -> bool { + if self.how_hungry > 0 { + println!("OM NOM NOM"); + self.how_hungry -= 2; + return true; + } else { + println!("Not hungry!"); + return false; + } + } + fn len(&self) -> usize { self.meows as usize } + fn is_empty(&self) -> bool { self.meows == 0 } + fn clear(&mut self) {} + fn contains_key(&self, k: &isize) -> bool { *k <= self.meows } + + fn find(&self, k: &isize) -> Option<&T> { + if *k <= self.meows { + Some(&self.name) + } else { + None + } + } + fn insert(&mut self, k: isize, _: T) -> bool { + self.meows += k; + true + } + + fn find_mut(&mut self, _k: &isize) -> Option<&mut T> { panic!() } + + fn remove(&mut self, k: &isize) -> bool { + if self.find(k).is_some() { + self.meows -= *k; true + } else { + false + } + } + + fn pop(&mut self, _k: &isize) -> Option<T> { panic!() } + + fn swap(&mut self, _k: isize, _v: T) -> Option<T> { panic!() } +} + +impl<T> cat<T> { + pub fn get(&self, k: &isize) -> &T { + match self.find(k) { + Some(v) => { v } + None => { panic!("epic fail"); } + } + } + + pub fn new(in_x: isize, in_y: isize, in_name: T) -> cat<T> { + cat{meows: in_x, how_hungry: in_y, name: in_name } + } +} + +impl<T> cat<T> { + fn meow(&mut self) { + self.meows += 1; + println!("Meow {}", self.meows); + if self.meows % 5 == 0 { + self.how_hungry += 1; + } + } +} + +pub fn main() { + let mut nyan: cat<String> = cat::new(0, 2, "nyan".to_string()); + for _ in 1_usize..5 { nyan.speak(); } + assert_eq!(*nyan.find(&1).unwrap(), "nyan".to_string()); + assert_eq!(nyan.find(&10), None); + let mut spotty: cat<cat_type> = cat::new(2, 57, cat_type::tuxedo); + for _ in 0_usize..6 { spotty.speak(); } + assert_eq!(spotty.len(), 8); + assert!((spotty.contains_key(&2))); + assert_eq!(spotty.get(&3), &cat_type::tuxedo); +} |