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use rustc::hir;
use rustc::hir::intravisit::{self, Visitor, NestedVisitorMap};
use syntax::ast;
use common::SharedCrateContext;
use monomorphize::Instance;
const SYMBOL_NAME: &'static str = "rustc_symbol_name";
const ITEM_PATH: &'static str = "rustc_item_path";
pub fn report_symbol_names(scx: &SharedCrateContext) {
let tcx = scx.tcx();
if !tcx.sess.features.borrow().rustc_attrs {
return;
}
let _ignore = tcx.dep_graph.in_ignore();
let mut visitor = SymbolNamesTest { scx: scx };
tcx.hir.krate().visit_all_item_likes(&mut visitor.as_deep_visitor());
}
struct SymbolNamesTest<'a, 'tcx:'a> {
scx: &'a SharedCrateContext<'a, 'tcx>,
}
impl<'a, 'tcx> SymbolNamesTest<'a, 'tcx> {
fn process_attrs(&mut self,
node_id: ast::NodeId) {
let tcx = self.scx.tcx();
let def_id = tcx.hir.local_def_id(node_id);
for attr in tcx.get_attrs(def_id).iter() {
if attr.check_name(SYMBOL_NAME) {
let instance = Instance::mono(self.scx, def_id);
let name = instance.symbol_name(self.scx);
tcx.sess.span_err(attr.span, &format!("symbol-name({})", name));
} else if attr.check_name(ITEM_PATH) {
let path = tcx.item_path_str(def_id);
tcx.sess.span_err(attr.span, &format!("item-path({})", path));
}
}
}
}
impl<'a, 'tcx> Visitor<'tcx> for SymbolNamesTest<'a, 'tcx> {
fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'tcx> {
NestedVisitorMap::None
}
fn visit_item(&mut self, item: &'tcx hir::Item) {
self.process_attrs(item.id);
intravisit::walk_item(self, item);
}
fn visit_trait_item(&mut self, ti: &'tcx hir::TraitItem) {
self.process_attrs(ti.id);
intravisit::walk_trait_item(self, ti)
}
fn visit_impl_item(&mut self, ii: &'tcx hir::ImplItem) {
self.process_attrs(ii.id);
intravisit::walk_impl_item(self, ii)
}
}