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// Test related to when a region bound is required to be specified.
trait IsStatic : 'static { }
trait IsSend : Send { }
trait Is<'a> : 'a { }
trait Is2<'a> : 'a { }
trait SomeTrait { }
// Bounds on object types:
struct Foo<'a,'b,'c> { //~ ERROR parameter `'c` is never used
// All of these are ok, because we can derive exactly one bound:
a: Box<dyn IsStatic>,
b: Box<dyn Is<'static>>,
c: Box<dyn Is<'a>>,
d: Box<dyn IsSend>,
e: Box<dyn Is<'a>+Send>, // we can derive two bounds, but one is 'static, so ok
f: Box<dyn SomeTrait>, // OK, defaults to 'static due to RFC 599.
g: Box<dyn SomeTrait+'a>,
z: Box<dyn Is<'a>+'b+'c>,
//~^ ERROR only a single explicit lifetime bound is permitted
//~| ERROR lifetime bound not satisfied
}
fn test<
'a,
'b,
A:IsStatic,
B:Is<'a>+Is2<'b>, // OK in a parameter, but not an object type.
C:'b+Is<'a>+Is2<'b>,
D:Is<'a>+Is2<'static>,
E:'a+'b // OK in a parameter, but not an object type.
>() { }
fn main() { }
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