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#![feature(type_changing_struct_update)]
#[derive(Clone)]
struct Machine<'a, S> {
state: S,
lt_str: &'a str,
common_field: i32,
}
#[derive(Clone)]
struct State1;
#[derive(Clone)]
struct State2;
fn update_to_state2() {
let s = String::from("hello");
let m1: Machine<State1> = Machine {
state: State1,
lt_str: &s,
//~^ ERROR `s` does not live long enough [E0597]
// FIXME: The error here actually comes from line 34. The
// span of the error message should be corrected to line 34
common_field: 2,
};
// update lifetime
let m3: Machine<'static, State1> = Machine {
lt_str: "hello, too",
..m1.clone()
};
// update lifetime and type
let m4: Machine<'static, State2> = Machine {
state: State2,
lt_str: "hello, again",
..m1.clone()
};
// updating to `static should fail.
let m2: Machine<'static, State1> = Machine {
..m1
};
}
fn main() {}
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