1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Walks the crate looking for items/impl-items/trait-items that have
12 //! either a `rustc_symbol_name` or `rustc_item_path` attribute and
13 //! generates an error giving, respectively, the symbol name or
14 //! item-path. This is used for unit testing the code that generates
15 //! paths etc in all kinds of annoying scenarios.
17 use back::symbol_names;
18 use rustc::middle::ty::TyCtxt;
20 use rustc_front::intravisit::{self, Visitor};
22 use syntax::attr::AttrMetaMethods;
23 use trans::common::CrateContext;
25 const SYMBOL_NAME: &'static str = "rustc_symbol_name";
26 const ITEM_PATH: &'static str = "rustc_item_path";
28 pub fn report_symbol_names(ccx: &CrateContext) {
29 // if the `rustc_attrs` feature is not enabled, then the
30 // attributes we are interested in cannot be present anyway, so
33 if !tcx.sess.features.borrow().rustc_attrs {
37 let _ignore = tcx.dep_graph.in_ignore();
38 let mut visitor = SymbolNamesTest { ccx: ccx, tcx: tcx };
39 tcx.map.krate().visit_all_items(&mut visitor);
42 struct SymbolNamesTest<'a, 'tcx:'a> {
43 ccx: &'a CrateContext<'a, 'tcx>,
44 tcx: &'a TyCtxt<'tcx>,
47 impl<'a, 'tcx> SymbolNamesTest<'a, 'tcx> {
48 fn process_attrs(&mut self,
49 node_id: ast::NodeId) {
50 let def_id = self.tcx.map.local_def_id(node_id);
51 for attr in self.tcx.get_attrs(def_id).iter() {
52 if attr.check_name(SYMBOL_NAME) {
53 // for now, just monomorphic names
54 let name = symbol_names::exported_name(self.ccx, def_id, &[]);
55 self.tcx.sess.span_err(attr.span, &format!("symbol-name({})", name));
56 } else if attr.check_name(ITEM_PATH) {
57 let path = self.tcx.item_path_str(def_id);
58 self.tcx.sess.span_err(attr.span, &format!("item-path({})", path));
61 // (*) The formatting of `tag({})` is chosen so that tests can elect
62 // to test the entirety of the string, if they choose, or else just
68 impl<'a, 'tcx> Visitor<'tcx> for SymbolNamesTest<'a, 'tcx> {
69 fn visit_item(&mut self, item: &'tcx hir::Item) {
70 self.process_attrs(item.id);
71 intravisit::walk_item(self, item);
74 fn visit_trait_item(&mut self, ti: &'tcx hir::TraitItem) {
75 self.process_attrs(ti.id);
76 intravisit::walk_trait_item(self, ti)
79 fn visit_impl_item(&mut self, ii: &'tcx hir::ImplItem) {
80 self.process_attrs(ii.id);
81 intravisit::walk_impl_item(self, ii)