// Copyright 2022 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef SRC_TINT_SEM_INDEX_ACCESSOR_EXPRESSION_H_
#define SRC_TINT_SEM_INDEX_ACCESSOR_EXPRESSION_H_

#include <vector>

#include "src/tint/sem/expression.h"

// Forward declarations
namespace tint::ast {
class IndexAccessorExpression;
}  // namespace tint::ast

namespace tint::sem {

/// IndexAccessorExpression holds the semantic information for a ast::IndexAccessorExpression node.
class IndexAccessorExpression final : public Castable<IndexAccessorExpression, Expression> {
  public:
    /// Constructor
    /// @param declaration the AST node
    /// @param type the resolved type of the expression
    /// @param stage the earliest evaluation stage for the expression
    /// @param object the object expression that is being indexed
    /// @param index the index expression
    /// @param statement the statement that owns this expression
    /// @param constant the constant value of the expression. May be null
    /// @param has_side_effects whether this expression may have side effects
    /// @param source_var the (optional) source variable for this expression
    IndexAccessorExpression(const ast::IndexAccessorExpression* declaration,
                            const sem::Type* type,
                            EvaluationStage stage,
                            const Expression* object,
                            const Expression* index,
                            const Statement* statement,
                            const Constant* constant,
                            bool has_side_effects,
                            const Variable* source_var = nullptr);

    /// Destructor
    ~IndexAccessorExpression() override;

    /// @returns the object expression that is being indexed
    Expression const* Object() const { return object_; }

    /// @returns the index expression
    Expression const* Index() const { return index_; }

  private:
    Expression const* const object_;
    Expression const* const index_;
};

}  // namespace tint::sem

#endif  // SRC_TINT_SEM_INDEX_ACCESSOR_EXPRESSION_H_