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