fd7a159710
Convert all the crates that have had their diagnostic migration completed (except save_analysis because that will be deleted soon and apfloat because of the licensing problem).
91 lines
3.1 KiB
Rust
91 lines
3.1 KiB
Rust
//! Walks the crate looking for items/impl-items/trait-items that have
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//! either a `rustc_symbol_name` or `rustc_def_path` attribute and
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//! generates an error giving, respectively, the symbol name or
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//! def-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 crate::errors::{Kind, TestOutput};
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use rustc_hir::def_id::LocalDefId;
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use rustc_middle::ty::print::with_no_trimmed_paths;
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use rustc_middle::ty::{subst::InternalSubsts, Instance, TyCtxt};
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use rustc_span::symbol::{sym, Symbol};
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const SYMBOL_NAME: Symbol = sym::rustc_symbol_name;
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const DEF_PATH: Symbol = sym::rustc_def_path;
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pub fn report_symbol_names(tcx: TyCtxt<'_>) {
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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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if !tcx.features().rustc_attrs {
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return;
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}
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tcx.dep_graph.with_ignore(|| {
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let mut symbol_names = SymbolNamesTest { tcx };
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let crate_items = tcx.hir_crate_items(());
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for id in crate_items.items() {
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symbol_names.process_attrs(id.owner_id.def_id);
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}
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for id in crate_items.trait_items() {
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symbol_names.process_attrs(id.owner_id.def_id);
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}
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for id in crate_items.impl_items() {
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symbol_names.process_attrs(id.owner_id.def_id);
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}
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for id in crate_items.foreign_items() {
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symbol_names.process_attrs(id.owner_id.def_id);
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}
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})
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}
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struct SymbolNamesTest<'tcx> {
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tcx: TyCtxt<'tcx>,
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}
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impl SymbolNamesTest<'_> {
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fn process_attrs(&mut self, def_id: LocalDefId) {
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let tcx = self.tcx;
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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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for attr in tcx.get_attrs(def_id.to_def_id(), SYMBOL_NAME) {
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let def_id = def_id.to_def_id();
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let instance = Instance::new(
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def_id,
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tcx.erase_regions(InternalSubsts::identity_for_item(tcx, def_id)),
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);
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let mangled = tcx.symbol_name(instance);
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tcx.sess.emit_err(TestOutput {
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span: attr.span,
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kind: Kind::SymbolName,
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content: format!("{mangled}"),
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});
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if let Ok(demangling) = rustc_demangle::try_demangle(mangled.name) {
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tcx.sess.emit_err(TestOutput {
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span: attr.span,
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kind: Kind::Demangling,
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content: format!("{demangling}"),
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});
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tcx.sess.emit_err(TestOutput {
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span: attr.span,
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kind: Kind::DemanglingAlt,
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content: format!("{demangling:#}"),
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});
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}
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}
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for attr in tcx.get_attrs(def_id.to_def_id(), DEF_PATH) {
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tcx.sess.emit_err(TestOutput {
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span: attr.span,
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kind: Kind::DefPath,
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content: with_no_trimmed_paths!(tcx.def_path_str(def_id.to_def_id())),
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});
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}
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}
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}
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