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 * The Universal Permissive License (UPL), Version 1.0
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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.graal.python.parser;

import java.util.ArrayList;
import java.util.List;

import com.oracle.graal.python.nodes.generator.AbstractYieldNode;

public final class GeneratorInfo {
    private final AbstractYieldNode[] yieldNodes;
    private final int numOfActiveFlags;
    private final int numOfBlockNodes;
    private final int numOfIteratorSlots;
    private final int numOfExceptionSlots;

    public static class Mutable {
        private final List<AbstractYieldNode> yieldNodes = new ArrayList<>();
        private int numOfActiveFlags;
        private int numOfBlockNodes;
        private int numOfIteratorSlots;
        private int numOfExceptionSlots;

        public GeneratorInfo getImmutable() {
            return new GeneratorInfo(this);
        }

        public List<AbstractYieldNode> getYieldNodes() {
            return yieldNodes;
        }

        public int getNumOfActiveFlags() {
            return numOfActiveFlags;
        }

        public int getNumOfBlockNodes() {
            return numOfBlockNodes;
        }

        public int getNumOfIteratorSlots() {
            return numOfIteratorSlots;
        }

        public int getNumOfExceptionSlots() {
            return numOfExceptionSlots;
        }

        public int nextActiveFlagIndex() {
            return numOfActiveFlags++;
        }

        public int nextBlockNodeIndex() {
            return numOfBlockNodes++;
        }

        public void decreaseNumOfBlockNodes() {
            numOfBlockNodes--;
        }

        public int nextIteratorSlotIndex() {
            return numOfIteratorSlots++;
        }

        public int nextExceptionSlotIndex() {
            return numOfExceptionSlots++;
        }
    }

    public GeneratorInfo(Mutable info) {
        yieldNodes = info.getYieldNodes().toArray(new AbstractYieldNode[0]);
        numOfActiveFlags = info.getNumOfActiveFlags();
        numOfBlockNodes = info.getNumOfBlockNodes();
        numOfIteratorSlots = info.getNumOfIteratorSlots();
        numOfExceptionSlots = info.getNumOfExceptionSlots();
    }

    public AbstractYieldNode[] getYieldNodes() {
        return yieldNodes;
    }

    public int getNumOfActiveFlags() {
        return numOfActiveFlags;
    }

    public int getNumOfBlockNodes() {
        return numOfBlockNodes;
    }

    public int getNumOfIteratorSlots() {
        return numOfIteratorSlots;
    }

    public int getNumOfExceptionSlots() {
        return numOfExceptionSlots;
    }
}
