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Correct comments about unsizing regarding #40319.

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Masaki Hara 2017-06-29 20:00:31 +09:00
parent 141265dfe8
commit 94862c601b
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1 changed files with 3 additions and 3 deletions
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6
src/librustc/traits/select.rs
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@ -2596,8 +2596,8 @@ impl<'cx, 'gcx, 'tcx> SelectionContext<'cx, 'gcx, 'tcx> {
let inner_source = field.subst(tcx, substs_a);
let inner_target = field.subst(tcx, substs_b);
// Check that the source structure with the target's
// type parameters is a subtype of the target.
// Check that the source struct with the target's
// unsized parameters is equal to the target.
let params = substs_a.iter().enumerate().map(|(i, &k)| {
if ty_params.contains(i) {
Kind::from(substs_b.type_at(i))
@ -2635,7 +2635,7 @@ impl<'cx, 'gcx, 'tcx> SelectionContext<'cx, 'gcx, 'tcx> {
let b_last = tys_b.last().unwrap();
// Check that the source tuple with the target's
// last element is a subtype of the target.
// last element is equal to the target.
let new_tuple = tcx.mk_tup(a_mid.iter().chain(Some(b_last)), false);
let InferOk { obligations, .. } =
self.infcx.at(&obligation.cause, obligation.param_env)