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|
// Test that the recursion limit can be changed and that the compiler
// suggests a fix. In this case, we have a long chain of Deref impls
// which will cause an overflow during the autoderef loop.
// compile-flags: -Zdeduplicate-diagnostics=yes
#![allow(dead_code)]
#![recursion_limit="10"]
macro_rules! link {
($outer:ident, $inner:ident) => {
struct $outer($inner);
impl $outer {
fn new() -> $outer {
$outer($inner::new())
}
}
impl std::ops::Deref for $outer {
type Target = $inner;
fn deref(&self) -> &$inner {
&self.0
}
}
}
}
struct Bottom;
impl Bottom {
fn new() -> Bottom {
Bottom
}
}
link!(Top, A);
link!(A, B);
link!(B, C);
link!(C, D);
link!(D, E);
link!(E, F);
link!(F, G);
link!(G, H);
link!(H, I);
link!(I, J);
link!(J, K);
link!(K, Bottom);
fn main() {
let t = Top::new();
let x: &Bottom = &t; //~ ERROR mismatched types
//~^ error recursion limit
}
|
