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// Copyright (C) 2021 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_HIR_SCAN_DEADCODE
#define RUST_HIR_SCAN_DEADCODE
#include <set>
#include "rust-hir-full-decls.h"
#include "rust-hir-map.h"
#include "rust-lint-marklive-base.h"
#include "rust-name-resolver.h"
#include "rust-diagnostics.h"
namespace Rust {
namespace Analysis {
class ScanDeadcode : public MarkLiveBase
{
using Rust::Analysis::MarkLiveBase::visit;
public:
static void Scan (HIR::Crate &crate, std::set<HirId> live_symbols)
{
ScanDeadcode sdc (live_symbols);
for (auto it = crate.items.begin (); it != crate.items.end (); it++)
{
it->get ()->accept_vis (sdc);
}
};
void visit (HIR::Function &function) override
{
HirId hirId = function.get_mappings ().get_hirid ();
if (live_symbols.find (hirId) == live_symbols.end ())
{
rust_warning_at (function.get_locus (), 0,
"function is never used: %<%s%>",
function.get_function_name ().c_str ());
return;
}
}
private:
std::set<HirId> live_symbols;
// std::set<HirId> dead_codes;
ScanDeadcode (std::set<HirId> &live_symbols) : live_symbols (live_symbols){};
};
} // namespace Analysis
} // namespace Rust
#endif
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