nashorn/src/jdk/nashorn/internal/runtime/regexp/joni/constants/Reduce.java

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package jdk.nashorn.internal.runtime.regexp.joni.constants;

import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.A;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.AQ;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.ASIS;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.DEL;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.PQ_Q;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.P_QQ;
import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.QQ;

public interface Reduce {

    enum ReduceType {
        ASIS,       /* as is */
        DEL,        /* delete parent */
        A,          /* to '*'    */
        AQ,         /* to '*?'   */
        QQ,         /* to '??'   */
        P_QQ,       /* to '+)??' */
        PQ_Q,       /* to '+?)?' */
    }

    final ReduceType[][]REDUCE_TABLE = {
      {DEL,     A,      A,      QQ,     AQ,     ASIS}, /* '?'  */
      {DEL,     DEL,    DEL,    P_QQ,   P_QQ,   DEL},  /* '*'  */
      {A,       A,      DEL,    ASIS,   P_QQ,   DEL},  /* '+'  */
      {DEL,     AQ,     AQ,     DEL,    AQ,     AQ},   /* '??' */
      {DEL,     DEL,    DEL,    DEL,    DEL,    DEL},  /* '*?' */
      {ASIS,    PQ_Q,   DEL,    AQ,     AQ,     DEL}   /* '+?' */
    };


    final String PopularQStr[] = new String[] {
        "?", "*", "+", "??", "*?", "+?"
    };

    String ReduceQStr[]= new String[] {
        "", "", "*", "*?", "??", "+ and ??", "+? and ?"
    };

}