41 lines
978 B
Rust
41 lines
978 B
Rust
// Test a trait (`Bar`) with a higher-ranked supertrait.
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#![allow(unconditional_recursion)]
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trait Foo<'tcx> {
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fn foo(&'tcx self) -> &'tcx isize;
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}
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trait Bar<'ccx>: for<'tcx> Foo<'tcx> {
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fn bar(&'ccx self) -> &'ccx isize;
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}
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fn want_foo_for_some_tcx<'x, F: Foo<'x>>(f: &'x F) {
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want_foo_for_some_tcx(f);
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want_foo_for_any_tcx(f);
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//~^ ERROR the trait bound `for<'tcx> F: Foo<'tcx>` is not satisfied
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}
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fn want_foo_for_any_tcx<F: for<'tcx> Foo<'tcx>>(f: &F) {
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want_foo_for_some_tcx(f);
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want_foo_for_any_tcx(f);
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}
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fn want_bar_for_some_ccx<'x, B: Bar<'x>>(b: &B) {
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want_foo_for_some_tcx(b);
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want_foo_for_any_tcx(b);
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want_bar_for_some_ccx(b);
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want_bar_for_any_ccx(b);
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//~^ ERROR the trait bound `for<'ccx> B: Bar<'ccx>` is not satisfied
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}
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fn want_bar_for_any_ccx<B: for<'ccx> Bar<'ccx>>(b: &B) {
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want_foo_for_some_tcx(b);
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want_foo_for_any_tcx(b);
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want_bar_for_some_ccx(b);
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want_bar_for_any_ccx(b);
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}
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fn main() {}
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