diff options
Diffstat (limited to 'src/test/ui/higher-rank-trait-bounds/hrtb-higher-ranker-supertraits.rs')
-rw-r--r-- | src/test/ui/higher-rank-trait-bounds/hrtb-higher-ranker-supertraits.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-higher-ranker-supertraits.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-higher-ranker-supertraits.rs new file mode 100644 index 000000000..48ebe5017 --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/hrtb-higher-ranker-supertraits.rs @@ -0,0 +1,48 @@ +// Test a trait (`Bar`) with a higher-ranked supertrait. + +trait Foo<'tcx> +{ + fn foo(&'tcx self) -> &'tcx isize; +} + +trait Bar<'ccx> + : for<'tcx> Foo<'tcx> +{ + fn bar(&'ccx self) -> &'ccx isize; +} + +fn want_foo_for_some_tcx<'x,F>(f: &'x F) + where F : Foo<'x> +{ + want_foo_for_some_tcx(f); + want_foo_for_any_tcx(f); //~ ERROR not satisfied +} + +fn want_foo_for_any_tcx<F>(f: &F) + where F : for<'tcx> Foo<'tcx> +{ + want_foo_for_some_tcx(f); + want_foo_for_any_tcx(f); +} + +fn want_bar_for_some_ccx<'x,B>(b: &B) + where B : Bar<'x> +{ + want_foo_for_some_tcx(b); + want_foo_for_any_tcx(b); + + want_bar_for_some_ccx(b); + want_bar_for_any_ccx(b); //~ ERROR not satisfied +} + +fn want_bar_for_any_ccx<B>(b: &B) + where B : for<'ccx> Bar<'ccx> +{ + want_foo_for_some_tcx(b); + want_foo_for_any_tcx(b); + + want_bar_for_some_ccx(b); + want_bar_for_any_ccx(b); +} + +fn main() {} |