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