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Add attribute support to generic lifetime and type parameters.

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I am using `ThinAttributes` rather than a vector for attributes
attached to generics, since I expect almost all lifetime and types
parameters to not carry any attributes.
This commit is contained in:
Felix S. Klock II
2016-05-17 18:51:45 +02:00
parent f2c53ea66b
commit 4c37ad6607
8 changed files with 85 additions and 14 deletions
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12
src/libsyntax/fold.rs
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@@ -662,8 +662,13 @@ pub fn noop_fold_ty_param_bound<T>(tpb: TyParamBound, fld: &mut T)
}
pub fn noop_fold_ty_param<T: Folder>(tp: TyParam, fld: &mut T) -> TyParam {
let TyParam {id, ident, bounds, default, span} = tp;
let TyParam {attrs, id, ident, bounds, default, span} = tp;
let attrs: Vec<_> = attrs.into();
TyParam {
attrs: attrs.into_iter()
.flat_map(|x| fld.fold_attribute(x).into_iter())
.collect::<Vec<_>>()
.into(),
id: fld.new_id(id),
ident: ident,
bounds: fld.fold_bounds(bounds),
@@ -687,7 +692,12 @@ pub fn noop_fold_lifetime<T: Folder>(l: Lifetime, fld: &mut T) -> Lifetime {
pub fn noop_fold_lifetime_def<T: Folder>(l: LifetimeDef, fld: &mut T)
-> LifetimeDef {
let attrs: Vec<_> = l.attrs.into();
LifetimeDef {
attrs: attrs.into_iter()
.flat_map(|x| fld.fold_attribute(x).into_iter())
.collect::<Vec<_>>()
.into(),
lifetime: fld.fold_lifetime(l.lifetime),
bounds: fld.fold_lifetimes(l.bounds),
}