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Mark proc_macro_decls_static as always used #105978

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merged 1 commit into from
Dec 23, 2022
Merged

Mark proc_macro_decls_static as always used #105978

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2 changes: 2 additions & 0 deletions compiler/rustc_builtin_macros/src/proc_macro_harness.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -262,6 +262,7 @@ impl<'a> Visitor<'a> for CollectProcMacros<'a> {
// use proc_macro::bridge::client::ProcMacro;
//
// #[rustc_proc_macro_decls]
// #[used]
// #[allow(deprecated)]
// static DECLS: &[ProcMacro] = &[
// ProcMacro::custom_derive($name_trait1, &[], ::$name1);
Expand Down Expand Up @@ -364,6 +365,7 @@ fn mk_decls(cx: &mut ExtCtxt<'_>, macros: &[ProcMacro]) -> P<ast::Item> {
)
.map(|mut i| {
i.attrs.push(cx.attr_word(sym::rustc_proc_macro_decls, span));
i.attrs.push(cx.attr_word(sym::used, span));
i.attrs.push(cx.attr_nested_word(sym::allow, sym::deprecated, span));
i
});
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1 change: 1 addition & 0 deletions src/test/ui/proc-macro/quote-debug.stdout
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Expand Up @@ -42,6 +42,7 @@ const _: () =
{
extern crate proc_macro;
#[rustc_proc_macro_decls]
#[used]
#[allow(deprecated)]
static _DECLS: &[proc_macro::bridge::client::ProcMacro] = &[];
};