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//@ run-pass
struct StrWrap {
s: String
}
impl StrWrap {
fn new(s: &str) -> StrWrap {
StrWrap { s: s.to_string() }
}
fn get_s<'a>(&'a self) -> &'a str {
&self.s
}
}
struct MyStruct {
s: StrWrap
}
impl MyStruct {
fn new(s: &str) -> MyStruct {
MyStruct { s: StrWrap::new(s) }
}
fn get_str_wrap<'a>(&'a self) -> &'a StrWrap {
&self.s
}
}
trait Matcher<T> {
fn matches(&self, actual: T) -> bool;
}
fn assert_that<T, U: Matcher<T>>(actual: T, matcher: &U) {
assert!(matcher.matches(actual));
}
struct EqualTo<T> {
expected: T
}
impl<T: Eq> Matcher<T> for EqualTo<T> {
fn matches(&self, actual: T) -> bool {
self.expected.eq(&actual)
}
}
fn equal_to<T: Eq>(expected: T) -> Box<EqualTo<T>> {
Box::new(EqualTo { expected: expected })
}
pub fn main() {
let my_struct = MyStruct::new("zomg");
let s = my_struct.get_str_wrap();
assert_that(s.get_s(), &*equal_to("zomg"));
}
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