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/*
 * 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.
 */
package io.trino.sql.routine.ir;

import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Optional;

import static java.util.Objects.requireNonNull;

public record IrBlock(Optional label, List variables, List statements)
        implements IrStatement
{
    public IrBlock(List variables, List statements)
    {
        this(Optional.empty(), variables, statements);
    }

    public IrBlock
    {
        requireNonNull(label, "label is null");
        variables = ImmutableList.copyOf(requireNonNull(variables, "variables is null"));
        statements = ImmutableList.copyOf(requireNonNull(statements, "statements is null"));
    }

    @Override
    public  R accept(IrNodeVisitor visitor, C context)
    {
        return visitor.visitBlock(this, context);
    }
}