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// Check that explicit region bounds are allowed on the various
// nominal types (but not on other types) and that they are type
// checked.
struct Inv<'a> { // invariant w/r/t 'a
x: &'a mut &'a isize
}
trait Foo<'x> {
fn method<'y:'x>(self, y: Inv<'y>);
}
fn caller1<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
// Here the value provided for 'y is 'a, and hence 'a:'a holds.
f.method(a);
}
fn caller2<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
// Here the value provided for 'y is 'b, and hence 'b:'a does not hold.
f.method(b);
//~^ ERROR lifetime may not live long enough
}
fn caller3<'a,'b:'a,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
// Here the value provided for 'y is 'b, and hence 'b:'a holds.
f.method(b);
}
fn main() { }
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