Workaround privacy bug or something else; filter_to_traits() fails to

nikomatsakis · nikomatsakis · commit ab02f9e42a15 · 2015-01-06T17:53:14.000-05:00
link, but this does the same thing.
diff --git a/src/librustc_typeck/check/method/probe.rs b/src/librustc_typeck/check/method/probe.rs
@@ -645,7 +645,7 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {
                    predicates.repr(self.tcx()));
             for poly_bound in
                 traits::elaborate_predicates(self.tcx(), predicates)
-                .filter_map(|p| p.to_opt_poly_trait_ref()) // TODO filter_to_traits()
+                .filter_map(|p| p.to_opt_poly_trait_ref())
                 .filter(|b| b.def_id() == trait_def_id)
             {
                 let bound = self.erase_late_bound_regions(&poly_bound);

Original file line number	Diff line number	Diff line change
`@@ -645,7 +645,7 @@ impl<'a,'tcx> ProbeContext<'a,'tcx> {`
`645`	`645`	`predicates.repr(self.tcx()));`
`646`	`646`	`for poly_bound in`
`647`	`647`	`traits::elaborate_predicates(self.tcx(), predicates)`
`648`		`- .filter_map(\|p\| p.to_opt_poly_trait_ref()) // TODO filter_to_traits()`
	`648`	`+ .filter_map(\|p\| p.to_opt_poly_trait_ref())`
`649`	`649`	`.filter(\|b\| b.def_id() == trait_def_id)`
`650`	`650`	`{`
`651`	`651`	`let bound = self.erase_late_bound_regions(&poly_bound);`