about summary refs log tree commit diff
path: root/src/test/ui/run-pass/traits/trait-generic.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/test/ui/run-pass/traits/trait-generic.rs')
-rw-r--r--src/test/ui/run-pass/traits/trait-generic.rs53
1 files changed, 53 insertions, 0 deletions
diff --git a/src/test/ui/run-pass/traits/trait-generic.rs b/src/test/ui/run-pass/traits/trait-generic.rs
new file mode 100644
index 00000000000..eadda5dfe29
--- /dev/null
+++ b/src/test/ui/run-pass/traits/trait-generic.rs
@@ -0,0 +1,53 @@
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+
+
+trait to_str {
+    fn to_string_(&self) -> String;
+}
+impl to_str for isize {
+    fn to_string_(&self) -> String { self.to_string() }
+}
+impl to_str for String {
+    fn to_string_(&self) -> String { self.clone() }
+}
+impl to_str for () {
+    fn to_string_(&self) -> String { "()".to_string() }
+}
+
+trait map<T> {
+    fn map<U, F>(&self, f: F) -> Vec<U> where F: FnMut(&T) -> U;
+}
+impl<T> map<T> for Vec<T> {
+    fn map<U, F>(&self, mut f: F) -> Vec<U> where F: FnMut(&T) -> U {
+        let mut r = Vec::new();
+        for i in self {
+            r.push(f(i));
+        }
+        r
+    }
+}
+
+fn foo<U, T: map<U>>(x: T) -> Vec<String> {
+    x.map(|_e| "hi".to_string() )
+}
+fn bar<U:to_str,T:map<U>>(x: T) -> Vec<String> {
+    x.map(|_e| _e.to_string_() )
+}
+
+pub fn main() {
+    assert_eq!(foo(vec![1]), ["hi".to_string()]);
+    assert_eq!(bar::<isize, Vec<isize> >(vec![4, 5]), ["4".to_string(), "5".to_string()]);
+    assert_eq!(bar::<String, Vec<String> >(vec!["x".to_string(), "y".to_string()]),
+               ["x".to_string(), "y".to_string()]);
+    assert_eq!(bar::<(), Vec<()>>(vec![()]), ["()".to_string()]);
+}