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// Copyright (C) 2020-2022 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#ifndef RUST_AST_RESOLVE_UNUSED_H
#define RUST_AST_RESOLVE_UNUSED_H
#include "rust-ast-resolve-base.h"
namespace Rust {
namespace Resolver {
class ScanUnused
{
public:
static bool ScanRib (Rib *r)
{
r->iterate_decls ([&] (NodeId decl_node_id, Location locus) -> bool {
CanonicalPath ident = CanonicalPath::create_empty ();
bool ok = r->lookup_canonical_path (decl_node_id, &ident);
rust_assert (ok);
bool name_starts_with_underscore = ident.get ().at (0) == '_';
if (!r->have_references_for_node (decl_node_id)
&& !name_starts_with_underscore)
{
rust_warning_at (locus, 0, "unused name '%s'", ident.get ().c_str ());
}
return true;
});
return true;
}
static void Scan ()
{
auto resolver = Resolver::get ();
resolver->iterate_name_ribs ([&] (Rib *r) -> bool { return ScanRib (r); });
resolver->iterate_type_ribs ([&] (Rib *r) -> bool { return ScanRib (r); });
resolver->iterate_label_ribs ([&] (Rib *r) -> bool { return ScanRib (r); });
}
};
} // namespace Resolver
} // namespace Rust
#endif // RUST_AST_RESOLVE_UNUSED_H
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