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// Copyright (C) 2020-2023 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_VERIFY_ASSIGNEE
#define RUST_AST_VERIFY_ASSIGNEE
#include "rust-ast-resolve-base.h"
#include "rust-ast-full.h"
namespace Rust {
namespace Resolver {
class VerifyAsignee : public ResolverBase
{
using Rust::Resolver::ResolverBase::visit;
public:
static bool go (AST::Expr *assignee)
{
VerifyAsignee checker;
assignee->accept_vis (checker);
if (!checker.ok)
rust_error_at (assignee->get_locus (),
"invalid left-hand side of assignment");
return checker.ok;
}
void visit (AST::ArrayIndexExpr &expr) override
{
expr.get_array_expr ()->accept_vis (*this);
}
void visit (AST::FieldAccessExpr &expr) override
{
expr.get_receiver_expr ()->accept_vis (*this);
}
void visit (AST::TupleIndexExpr &expr) override
{
expr.get_tuple_expr ()->accept_vis (*this);
}
void visit (AST::IdentifierExpr &expr) override
{
if (!resolver->get_name_scope ().lookup (
CanonicalPath::new_seg (expr.get_node_id (), expr.as_string ()),
&resolved_node))
return;
ok = true;
}
void visit (AST::DereferenceExpr &expr) override
{
expr.get_dereferenced_expr ()->accept_vis (*this);
}
void visit (AST::PathInExpression &) override { ok = true; }
private:
VerifyAsignee () : ResolverBase (), ok (false) {}
bool ok;
};
} // namespace Resolver
} // namespace Rust
#endif // RUST_AST_VERIFY_ASSIGNEE
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