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use rustc::hir::itemlikevisit::ItemLikeVisitor;
use rustc::hir;
use rustc::middle::cstore::ForeignModule;
use rustc::ty::TyCtxt;
pub fn collect<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) -> Vec<ForeignModule> {
let mut collector = Collector {
tcx,
modules: Vec::new(),
};
tcx.hir().krate().visit_all_item_likes(&mut collector);
return collector.modules
}
struct Collector<'a, 'tcx: 'a> {
tcx: TyCtxt<'a, 'tcx, 'tcx>,
modules: Vec<ForeignModule>,
}
impl<'a, 'tcx> ItemLikeVisitor<'tcx> for Collector<'a, 'tcx> {
fn visit_item(&mut self, it: &'tcx hir::Item) {
let fm = match it.node {
hir::ItemKind::ForeignMod(ref fm) => fm,
_ => return,
};
let foreign_items = fm.items.iter()
.map(|it| self.tcx.hir().local_def_id_from_hir_id(it.hir_id))
.collect();
self.modules.push(ForeignModule {
foreign_items,
def_id: self.tcx.hir().local_def_id_from_hir_id(it.hir_id),
});
}
fn visit_trait_item(&mut self, _it: &'tcx hir::TraitItem) {}
fn visit_impl_item(&mut self, _it: &'tcx hir::ImplItem) {}
}
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