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Update get_lib_features, defined_lib_features, get_lang_items, defined_lang_items, missing_lang_items, postorder_cnums and maybe_unused_extern_crates

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This commit is contained in:
John Kåre Alsaker 2018-12-01 16:57:29 +01:00
parent 46f2511296
commit 3f87975d65
7 changed files with 42 additions and 34 deletions
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34
src/librustc_metadata/decoder.rs
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@ -708,26 +708,30 @@ impl<'a, 'tcx> CrateMetadata {
}
/// Iterates over all the stability attributes in the given crate.
pub fn get_lib_features(&self) -> Vec<(ast::Name, Option<ast::Name>)> {
pub fn get_lib_features(
&self,
tcx: TyCtxt<'_, 'tcx, '_>,
) -> &'tcx [(ast::Name, Option<ast::Name>)] {
// FIXME: For a proc macro crate, not sure whether we should return the "host"
// features or an empty Vec. Both don't cause ICEs.
self.root
tcx.arena.alloc_from_iter(self.root
.lib_features
.decode(self)
.collect()
.decode(self))
}
/// Iterates over the language items in the given crate.
pub fn get_lang_items(&self) -> Vec<(DefId, usize)> {
pub fn get_lang_items(
&self,
tcx: TyCtxt<'_, 'tcx, '_>,
) -> &'tcx [(DefId, usize)] {
if self.proc_macros.is_some() {
// Proc macro crates do not export any lang-items to the target.
vec![]
&[]
} else {
self.root
tcx.arena.alloc_from_iter(self.root
.lang_items
.decode(self)
.map(|(def_index, index)| (self.local_def_id(def_index), index))
.collect()
.map(|(def_index, index)| (self.local_def_id(def_index), index)))
}
}
@ -1102,15 +1106,17 @@ impl<'a, 'tcx> CrateMetadata {
.collect()
}
pub fn get_missing_lang_items(&self) -> Vec<lang_items::LangItem> {
pub fn get_missing_lang_items(
&self,
tcx: TyCtxt<'_, 'tcx, '_>,
) -> &'tcx [lang_items::LangItem] {
if self.proc_macros.is_some() {
// Proc macro crates do not depend on any target weak lang-items.
vec![]
&[]
} else {
self.root
tcx.arena.alloc_from_iter(self.root
.lang_items_missing
.decode(self)
.collect()
.decode(self))
}
}