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-rw-r--r--src/test/ui/structs-enums/class-impl-very-parameterized-trait.rs107
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);
+}