85 lines
3.0 KiB
Rust
85 lines
3.0 KiB
Rust
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// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Walks the crate looking for items/impl-items/trait-items that have
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//! either a `rustc_symbol_name` or `rustc_item_path` attribute and
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//! generates an error giving, respectively, the symbol name or
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//! item-path. This is used for unit testing the code that generates
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//! paths etc in all kinds of annoying scenarios.
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use back::symbol_names;
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use rustc::middle::ty::TyCtxt;
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use rustc_front::hir;
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use rustc_front::intravisit::{self, Visitor};
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use syntax::ast;
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use syntax::attr::AttrMetaMethods;
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use trans::common::CrateContext;
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const SYMBOL_NAME: &'static str = "rustc_symbol_name";
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const ITEM_PATH: &'static str = "rustc_item_path";
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pub fn report_symbol_names(ccx: &CrateContext) {
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// if the `rustc_attrs` feature is not enabled, then the
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// attributes we are interested in cannot be present anyway, so
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// skip the walk.
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let tcx = ccx.tcx();
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if !tcx.sess.features.borrow().rustc_attrs {
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return;
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}
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let _ignore = tcx.dep_graph.in_ignore();
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let mut visitor = SymbolNamesTest { ccx: ccx, tcx: tcx };
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tcx.map.krate().visit_all_items(&mut visitor);
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}
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struct SymbolNamesTest<'a, 'tcx:'a> {
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ccx: &'a CrateContext<'a, 'tcx>,
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tcx: &'a TyCtxt<'tcx>,
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}
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impl<'a, 'tcx> SymbolNamesTest<'a, 'tcx> {
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fn process_attrs(&mut self,
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node_id: ast::NodeId) {
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let def_id = self.tcx.map.local_def_id(node_id);
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for attr in self.tcx.get_attrs(def_id).iter() {
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if attr.check_name(SYMBOL_NAME) {
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// for now, just monomorphic names
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let name = symbol_names::exported_name(self.ccx, def_id, &[]);
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self.tcx.sess.span_err(attr.span, &format!("symbol-name({})", name));
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} else if attr.check_name(ITEM_PATH) {
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let path = self.tcx.item_path_str(def_id);
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self.tcx.sess.span_err(attr.span, &format!("item-path({})", path));
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}
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// (*) The formatting of `tag({})` is chosen so that tests can elect
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// to test the entirety of the string, if they choose, or else just
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// some subset.
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}
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}
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}
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impl<'a, 'tcx> Visitor<'tcx> for SymbolNamesTest<'a, 'tcx> {
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fn visit_item(&mut self, item: &'tcx hir::Item) {
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self.process_attrs(item.id);
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intravisit::walk_item(self, item);
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}
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fn visit_trait_item(&mut self, ti: &'tcx hir::TraitItem) {
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self.process_attrs(ti.id);
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intravisit::walk_trait_item(self, ti)
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}
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fn visit_impl_item(&mut self, ii: &'tcx hir::ImplItem) {
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self.process_attrs(ii.id);
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intravisit::walk_impl_item(self, ii)
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}
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}
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