51 lines
707 B
Rust
51 lines
707 B
Rust
// Test HRTB supertraits with several levels of expansion required.
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trait Foo<'tcx>
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{
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fn foo(&'tcx self) -> &'tcx isize;
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}
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trait Bar<'ccx>
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: for<'tcx> Foo<'tcx>
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{
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fn bar(&'ccx self) -> &'ccx isize;
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}
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trait Baz
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: for<'ccx> Bar<'ccx>
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{
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fn dummy(&self);
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}
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trait Qux
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: Bar<'static>
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{
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fn dummy(&self);
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}
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fn want_foo_for_any_tcx<F>(f: &F)
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where F : for<'tcx> Foo<'tcx>
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{
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}
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fn want_bar_for_any_ccx<B>(b: &B)
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where B : for<'ccx> Bar<'ccx>
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{
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}
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fn want_baz<B>(b: &B)
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where B : Baz
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{
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want_foo_for_any_tcx(b);
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want_bar_for_any_ccx(b);
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}
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fn want_qux<B>(b: &B)
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where B : Qux
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{
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want_foo_for_any_tcx(b);
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want_bar_for_any_ccx(b); //~ ERROR
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}
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fn main() {}
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