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Rename generated lifetime.

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This commit is contained in:
Camille GILLOT 2019-11-15 18:58:40 +01:00
parent 35cba9eb0b
commit a65091ffff
1 changed files with 5 additions and 5 deletions
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10
src/librustc_macros/src/lift.rs
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@ -7,19 +7,19 @@ pub fn lift_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStre
s.add_bounds(synstructure::AddBounds::Generics);
let tcx: syn::Lifetime = parse_quote!('tcx);
let newtcx: syn::GenericParam = parse_quote!('__newtcx);
let newtcx: syn::GenericParam = parse_quote!('__lifted);
let lifted = {
let ast = s.ast();
let ident = &ast.ident;
// Replace `'tcx` lifetime by the `'__newtcx` lifetime
// Replace `'tcx` lifetime by the `'__lifted` lifetime
let (_, generics, _) = ast.generics.split_for_impl();
let mut generics : syn::AngleBracketedGenericArguments = syn::parse_quote!{ #generics };
for arg in generics.args.iter_mut() {
match arg {
syn::GenericArgument::Lifetime(l) if *l == tcx => {
*arg = parse_quote!('__newtcx);
*arg = parse_quote!('__lifted);
},
syn::GenericArgument::Type(t) => {
*arg = syn::parse_quote!{ #t::Lifted };
@ -40,10 +40,10 @@ pub fn lift_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::TokenStre
});
s.add_impl_generic(newtcx);
s.bound_impl(quote!(::rustc::ty::Lift<'__newtcx>), quote!{
s.bound_impl(quote!(::rustc::ty::Lift<'__lifted>), quote!{
type Lifted = #lifted;
fn lift_to_tcx(&self, __tcx: ::rustc::ty::TyCtxt<'__newtcx>) -> Option<#lifted> {
fn lift_to_tcx(&self, __tcx: ::rustc::ty::TyCtxt<'__lifted>) -> Option<#lifted> {
Some(match *self { #body })
}
})