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Parse trait object types starting with a lifetime bound

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This commit is contained in:
Vadim Petrochenkov 2017-02-22 23:59:40 +03:00
parent 2b4c911581
commit d349e87d61
5 changed files with 78 additions and 2 deletions
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4
src/libsyntax/parse/parser.rs
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@ -1451,9 +1451,9 @@ impl<'a> Parser<'a> {
} else if self.eat_keyword(keywords::Impl) {
// FIXME: figure out priority of `+` in `impl Trait1 + Trait2` (#34511).
TyKind::ImplTrait(self.parse_ty_param_bounds()?)
} else if self.check(&token::Question) {
} else if self.check(&token::Question) ||
self.check_lifetime() && self.look_ahead(1, |t| t == &token::BinOp(token::Plus)){
// Bound list (trait object type)
// Bound lists starting with `'lt` are not currently supported (#40043)
TyKind::TraitObject(self.parse_ty_param_bounds_common(allow_plus)?)
} else {
let msg = format!("expected type, found {}", self.this_token_descr());