--- /dev/null
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Walks the crate looking for items/impl-items/trait-items that have
+//! either a `rustc_symbol_name` or `rustc_item_path` attribute and
+//! generates an error giving, respectively, the symbol name or
+//! item-path. This is used for unit testing the code that generates
+//! paths etc in all kinds of annoying scenarios.
+
+use back::symbol_names;
+use rustc::middle::ty::TyCtxt;
+use rustc_front::hir;
+use rustc_front::intravisit::{self, Visitor};
+use syntax::ast;
+use syntax::attr::AttrMetaMethods;
+use trans::common::CrateContext;
+
+const SYMBOL_NAME: &'static str = "rustc_symbol_name";
+const ITEM_PATH: &'static str = "rustc_item_path";
+
+pub fn report_symbol_names(ccx: &CrateContext) {
+ // if the `rustc_attrs` feature is not enabled, then the
+ // attributes we are interested in cannot be present anyway, so
+ // skip the walk.
+ let tcx = ccx.tcx();
+ if !tcx.sess.features.borrow().rustc_attrs {
+ return;
+ }
+
+ let _ignore = tcx.dep_graph.in_ignore();
+ let mut visitor = SymbolNamesTest { ccx: ccx, tcx: tcx };
+ tcx.map.krate().visit_all_items(&mut visitor);
+}
+
+struct SymbolNamesTest<'a, 'tcx:'a> {
+ ccx: &'a CrateContext<'a, 'tcx>,
+ tcx: &'a TyCtxt<'tcx>,
+}
+
+impl<'a, 'tcx> SymbolNamesTest<'a, 'tcx> {
+ fn process_attrs(&mut self,
+ node_id: ast::NodeId) {
+ let def_id = self.tcx.map.local_def_id(node_id);
+ for attr in self.tcx.get_attrs(def_id).iter() {
+ if attr.check_name(SYMBOL_NAME) {
+ // for now, just monomorphic names
+ let name = symbol_names::exported_name(self.ccx, def_id, &[]);
+ self.tcx.sess.span_err(attr.span, &format!("symbol-name({})", name));
+ } else if attr.check_name(ITEM_PATH) {
+ let path = self.tcx.item_path_str(def_id);
+ self.tcx.sess.span_err(attr.span, &format!("item-path({})", path));
+ }
+
+ // (*) The formatting of `tag({})` is chosen so that tests can elect
+ // to test the entirety of the string, if they choose, or else just
+ // some subset.
+ }
+ }
+}
+
+impl<'a, 'tcx> Visitor<'tcx> for SymbolNamesTest<'a, 'tcx> {
+ 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)
+ }
+}
+
"the `#[rustc_if_this_changed]` attribute \
is just used for rustc unit tests \
and will never be stable")),
+ ("rustc_symbol_name", Whitelisted, Gated("rustc_attrs",
+ "internal rustc attributes will never be stable")),
+ ("rustc_item_path", Whitelisted, Gated("rustc_attrs",
+ "internal rustc attributes will never be stable")),
("rustc_move_fragments", Normal, Gated("rustc_attrs",
"the `#[rustc_move_fragments]` attribute \
is just used for rustc unit tests \
pub const_indexing: bool,
pub static_recursion: bool,
pub default_type_parameter_fallback: bool,
+ pub rustc_attrs: bool,
pub type_macros: bool,
pub cfg_target_feature: bool,
pub cfg_target_vendor: bool,
const_indexing: false,
static_recursion: false,
default_type_parameter_fallback: false,
+ rustc_attrs: false,
type_macros: false,
cfg_target_feature: false,
cfg_target_vendor: false,
const_indexing: cx.has_feature("const_indexing"),
static_recursion: cx.has_feature("static_recursion"),
default_type_parameter_fallback: cx.has_feature("default_type_parameter_fallback"),
+ rustc_attrs: cx.has_feature("rustc_attrs"),
type_macros: cx.has_feature("type_macros"),
cfg_target_feature: cx.has_feature("cfg_target_feature"),
cfg_target_vendor: cx.has_feature("cfg_target_vendor"),
--- /dev/null
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(rustc_attrs)]
+
+#[rustc_symbol_name] //~ ERROR _ZN5basic4main
+#[rustc_item_path] //~ ERROR item-path(main)
+fn main() {
+}
--- /dev/null
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+mod foo {
+ pub struct Foo { x: u32 }
+
+ impl Foo {
+ #[rustc_symbol_name] //~ ERROR _ZN5impl13foo3Foo3bar
+ #[rustc_item_path] //~ ERROR item-path(foo::Foo::bar)
+ fn bar() { }
+ }
+}
+
+mod bar {
+ use foo::Foo;
+
+ impl Foo {
+ #[rustc_symbol_name] //~ ERROR _ZN5impl13bar26_$LT$impl$u20$foo..Foo$GT$3baz
+ #[rustc_item_path] //~ ERROR item-path(bar::<impl foo::Foo>::baz)
+ fn baz() { }
+ }
+}
+
+fn main() {
+}
projects / rust.git / commitdiff