diff options
Diffstat (limited to 'compiler/rustc_builtin_macros/src/deriving/generic/mod.rs')
| -rw-r--r-- | compiler/rustc_builtin_macros/src/deriving/generic/mod.rs | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs index 3cc160adb..16ee3aa89 100644 --- a/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs +++ b/compiler/rustc_builtin_macros/src/deriving/generic/mod.rs @@ -174,6 +174,7 @@ use rustc_span::symbol::{kw, sym, Ident, Symbol}; use rustc_span::Span; use std::cell::RefCell; use std::iter; +use std::ops::Not; use std::vec; use thin_vec::thin_vec; use ty::{Bounds, Path, Ref, Self_, Ty}; @@ -187,6 +188,9 @@ pub struct TraitDef<'a> { /// Path of the trait, including any type parameters pub path: Path, + /// Whether to skip adding the current trait as a bound to the type parameters of the type. + pub skip_path_as_bound: bool, + /// Additional bounds required of any type parameters of the type, /// other than the current trait pub additional_bounds: Vec<Ty>, @@ -562,7 +566,7 @@ impl<'a> TraitDef<'a> { tokens: None, }, attrs: ast::AttrVec::new(), - kind: ast::AssocItemKind::TyAlias(Box::new(ast::TyAlias { + kind: ast::AssocItemKind::Type(Box::new(ast::TyAlias { defaultness: ast::Defaultness::Final, generics: Generics::default(), where_clauses: ( @@ -596,7 +600,7 @@ impl<'a> TraitDef<'a> { cx.trait_bound(p.to_path(cx, self.span, type_ident, generics)) }).chain( // require the current trait - iter::once(cx.trait_bound(trait_path.clone())) + self.skip_path_as_bound.not().then(|| cx.trait_bound(trait_path.clone())) ).chain( // also add in any bounds from the declaration param.bounds.iter().cloned() @@ -1110,6 +1114,11 @@ impl<'a> MethodDef<'a> { /// ``` /// is equivalent to: /// ``` + /// #![feature(core_intrinsics)] + /// enum A { + /// A1, + /// A2(i32) + /// } /// impl ::core::cmp::PartialEq for A { /// #[inline] /// fn eq(&self, other: &A) -> bool { |