@yworks/antlr4/atn/ATNDeserializer.js

Modified JavaScript runtime for ANTLR4

/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

var Token = require('./../Token').Token;
var ATN = require('./ATN').ATN;
var ATNType = require('./ATNType').ATNType;
var ATNStates = require('./ATNState');
var ATNState = ATNStates.ATNState;
var BasicState = ATNStates.BasicState;
var DecisionState = ATNStates.DecisionState;
var BlockStartState = ATNStates.BlockStartState;
var BlockEndState = ATNStates.BlockEndState;
var LoopEndState = ATNStates.LoopEndState;
var RuleStartState = ATNStates.RuleStartState;
var RuleStopState = ATNStates.RuleStopState;
var TokensStartState = ATNStates.TokensStartState;
var PlusLoopbackState = ATNStates.PlusLoopbackState;
var StarLoopbackState = ATNStates.StarLoopbackState;
var StarLoopEntryState = ATNStates.StarLoopEntryState;
var PlusBlockStartState = ATNStates.PlusBlockStartState;
var StarBlockStartState = ATNStates.StarBlockStartState;
var BasicBlockStartState = ATNStates.BasicBlockStartState;
var Transitions = require('./Transition');
var Transition = Transitions.Transition;
var AtomTransition = Transitions.AtomTransition;
var SetTransition = Transitions.SetTransition;
var NotSetTransition = Transitions.NotSetTransition;
var RuleTransition = Transitions.RuleTransition;
var RangeTransition = Transitions.RangeTransition;
var ActionTransition = Transitions.ActionTransition;
var EpsilonTransition = Transitions.EpsilonTransition;
var WildcardTransition = Transitions.WildcardTransition;
var PredicateTransition = Transitions.PredicateTransition;
var PrecedencePredicateTransition = Transitions.PrecedencePredicateTransition;
var IntervalSet = require('./../IntervalSet').IntervalSet;
var Interval = require('./../IntervalSet').Interval;
var ATNDeserializationOptions = require('./ATNDeserializationOptions').ATNDeserializationOptions;
var LexerActions = require('./LexerAction');
var LexerActionType = LexerActions.LexerActionType;
var LexerSkipAction = LexerActions.LexerSkipAction;
var LexerChannelAction = LexerActions.LexerChannelAction;
var LexerCustomAction = LexerActions.LexerCustomAction;
var LexerMoreAction = LexerActions.LexerMoreAction;
var LexerTypeAction = LexerActions.LexerTypeAction;
var LexerPushModeAction = LexerActions.LexerPushModeAction;
var LexerPopModeAction = LexerActions.LexerPopModeAction;
var LexerModeAction = LexerActions.LexerModeAction;
// This is the earliest supported serialized UUID.
// stick to serialized version for now, we don't need a UUID instance
var BASE_SERIALIZED_UUID = "AADB8D7E-AEEF-4415-AD2B-8204D6CF042E";

//
// This UUID indicates the serialized ATN contains two sets of
// IntervalSets, where the second set's values are encoded as
// 32-bit integers to support the full Unicode SMP range up to U+10FFFF.
//
var ADDED_UNICODE_SMP = "59627784-3BE5-417A-B9EB-8131A7286089";

// This list contains all of the currently supported UUIDs, ordered by when
// the feature first appeared in this branch.
var SUPPORTED_UUIDS = [ BASE_SERIALIZED_UUID, ADDED_UNICODE_SMP ];

var SERIALIZED_VERSION = 3;

// This is the current serialized UUID.
var SERIALIZED_UUID = ADDED_UNICODE_SMP;

function initArray( length, value) {
	var tmp = [];
	tmp[length-1] = value;
	return tmp.map(function(i) {return value;});
}

function ATNDeserializer (options) {

    if ( options=== undefined || options === null ) {
        options = ATNDeserializationOptions.defaultOptions;
    }
    this.deserializationOptions = options;
    this.stateFactories = null;
    this.actionFactories = null;

    return this;
}

// Determines if a particular serialized representation of an ATN supports
// a particular feature, identified by the {@link UUID} used for serializing
// the ATN at the time the feature was first introduced.
//
// @param feature The {@link UUID} marking the first time the feature was
// supported in the serialized ATN.
// @param actualUuid The {@link UUID} of the actual serialized ATN which is
// currently being deserialized.
// @return {@code true} if the {@code actualUuid} value represents a
// serialized ATN at or after the feature identified by {@code feature} was
// introduced; otherwise, {@code false}.

ATNDeserializer.prototype.isFeatureSupported = function(feature, actualUuid) {
    var idx1 = SUPPORTED_UUIDS.indexOf(feature);
    if (idx1<0) {
        return false;
    }
    var idx2 = SUPPORTED_UUIDS.indexOf(actualUuid);
    return idx2 >= idx1;
};

ATNDeserializer.prototype.deserialize = function(data) {
    this.reset(data);
    this.checkVersion();
    this.checkUUID();
    var atn = this.readATN();
    this.readStates(atn);
    this.readRules(atn);
    this.readModes(atn);
    var sets = [];
    // First, deserialize sets with 16-bit arguments <= U+FFFF.
    this.readSets(atn, sets, this.readInt.bind(this));
    // Next, if the ATN was serialized with the Unicode SMP feature,
    // deserialize sets with 32-bit arguments <= U+10FFFF.
    if (this.isFeatureSupported(ADDED_UNICODE_SMP, this.uuid)) {
        this.readSets(atn, sets, this.readInt32.bind(this));
    }
    this.readEdges(atn, sets);
    this.readDecisions(atn);
    this.readLexerActions(atn);
    this.markPrecedenceDecisions(atn);
    this.verifyATN(atn);
    if (this.deserializationOptions.generateRuleBypassTransitions && atn.grammarType === ATNType.PARSER ) {
        this.generateRuleBypassTransitions(atn);
        // re-verify after modification
        this.verifyATN(atn);
    }
    return atn;
};

ATNDeserializer.prototype.reset = function(data) {
	var adjust = function(c) {
        var v = c.charCodeAt(0);
        return v>1  ? v-2 : v + 65533;
	};
    var temp = data.split("").map(adjust);
    // don't adjust the first value since that's the version number
    temp[0] = data.charCodeAt(0);
    this.data = temp;
    this.pos = 0;
};

ATNDeserializer.prototype.checkVersion = function() {
    var version = this.readInt();
    if ( version !== SERIALIZED_VERSION ) {
        throw ("Could not deserialize ATN with version " + version + " (expected " + SERIALIZED_VERSION + ").");
    }
};

ATNDeserializer.prototype.checkUUID = function() {
    var uuid = this.readUUID();
    if (SUPPORTED_UUIDS.indexOf(uuid)<0) {
        throw ("Could not deserialize ATN with UUID: " + uuid +
                        " (expected " + SERIALIZED_UUID + " or a legacy UUID).", uuid, SERIALIZED_UUID);
    }
    this.uuid = uuid;
};

ATNDeserializer.prototype.readATN = function() {
    var grammarType = this.readInt();
    var maxTokenType = this.readInt();
    return new ATN(grammarType, maxTokenType);
};

ATNDeserializer.prototype.readStates = function(atn) {
	var j, pair, stateNumber;
    var loopBackStateNumbers = [];
    var endStateNumbers = [];
    var nstates = this.readInt();
    for(var i=0; i<nstates; i++) {
        var stype = this.readInt();
        // ignore bad type of states
        if (stype===ATNState.INVALID_TYPE) {
            atn.addState(null);
            continue;
        }
        var ruleIndex = this.readInt();
        if (ruleIndex === 0xFFFF) {
            ruleIndex = -1;
        }
        var s = this.stateFactory(stype, ruleIndex);
        if (stype === ATNState.LOOP_END) { // special case
            var loopBackStateNumber = this.readInt();
            loopBackStateNumbers.push([s, loopBackStateNumber]);
        } else if(s instanceof BlockStartState) {
            var endStateNumber = this.readInt();
            endStateNumbers.push([s, endStateNumber]);
        }
        atn.addState(s);
    }
    // delay the assignment of loop back and end states until we know all the
	// state instances have been initialized
    for (j=0; j<loopBackStateNumbers.length; j++) {
        pair = loopBackStateNumbers[j];
        pair[0].loopBackState = atn.states[pair[1]];
    }

    for (j=0; j<endStateNumbers.length; j++) {
        pair = endStateNumbers[j];
        pair[0].endState = atn.states[pair[1]];
    }

    var numNonGreedyStates = this.readInt();
    for (j=0; j<numNonGreedyStates; j++) {
        stateNumber = this.readInt();
        atn.states[stateNumber].nonGreedy = true;
    }

    var numPrecedenceStates = this.readInt();
    for (j=0; j<numPrecedenceStates; j++) {
        stateNumber = this.readInt();
        atn.states[stateNumber].isPrecedenceRule = true;
    }
};

ATNDeserializer.prototype.readRules = function(atn) {
    var i;
    var nrules = this.readInt();
    if (atn.grammarType === ATNType.LEXER ) {
        atn.ruleToTokenType = initArray(nrules, 0);
    }
    atn.ruleToStartState = initArray(nrules, 0);
    for (i=0; i<nrules; i++) {
        var s = this.readInt();
        var startState = atn.states[s];
        atn.ruleToStartState[i] = startState;
        if ( atn.grammarType === ATNType.LEXER ) {
            var tokenType = this.readInt();
            if (tokenType === 0xFFFF) {
                tokenType = Token.EOF;
            }
            atn.ruleToTokenType[i] = tokenType;
        }
    }
    atn.ruleToStopState = initArray(nrules, 0);
    for (i=0; i<atn.states.length; i++) {
        var state = atn.states[i];
        if (!(state instanceof RuleStopState)) {
            continue;
        }
        atn.ruleToStopState[state.ruleIndex] = state;
        atn.ruleToStartState[state.ruleIndex].stopState = state;
    }
};

ATNDeserializer.prototype.readModes = function(atn) {
    var nmodes = this.readInt();
    for (var i=0; i<nmodes; i++) {
        var s = this.readInt();
        atn.modeToStartState.push(atn.states[s]);
    }
};

ATNDeserializer.prototype.readSets = function(atn, sets, readUnicode) {
    var m = this.readInt();
    for (var i=0; i<m; i++) {
        var iset = new IntervalSet();
        sets.push(iset);
        var n = this.readInt();
        var containsEof = this.readInt();
        if (containsEof!==0) {
            iset.addOne(-1);
        }
        for (var j=0; j<n; j++) {
            var i1 = readUnicode();
            var i2 = readUnicode();
            iset.addRange(i1, i2);
        }
    }
};

ATNDeserializer.prototype.readEdges = function(atn, sets) {
	var i, j, state, trans, target;
    var nedges = this.readInt();
    for (i=0; i<nedges; i++) {
        var src = this.readInt();
        var trg = this.readInt();
        var ttype = this.readInt();
        var arg1 = this.readInt();
        var arg2 = this.readInt();
        var arg3 = this.readInt();
        trans = this.edgeFactory(atn, ttype, src, trg, arg1, arg2, arg3, sets);
        var srcState = atn.states[src];
        srcState.addTransition(trans);
    }
    // edges for rule stop states can be derived, so they aren't serialized
    for (i=0; i<atn.states.length; i++) {
        state = atn.states[i];
        for (j=0; j<state.transitions.length; j++) {
            var t = state.transitions[j];
            if (!(t instanceof RuleTransition)) {
                continue;
            }
			var outermostPrecedenceReturn = -1;
			if (atn.ruleToStartState[t.target.ruleIndex].isPrecedenceRule) {
				if (t.precedence === 0) {
					outermostPrecedenceReturn = t.target.ruleIndex;
				}
			}

			trans = new EpsilonTransition(t.followState, outermostPrecedenceReturn);
            atn.ruleToStopState[t.target.ruleIndex].addTransition(trans);
        }
    }

    for (i=0; i<atn.states.length; i++) {
        state = atn.states[i];
        if (state instanceof BlockStartState) {
            // we need to know the end state to set its start state
            if (state.endState === null) {
                throw ("IllegalState");
            }
            // block end states can only be associated to a single block start
			// state
            if ( state.endState.startState !== null) {
                throw ("IllegalState");
            }
            state.endState.startState = state;
        }
        if (state instanceof PlusLoopbackState) {
            for (j=0; j<state.transitions.length; j++) {
                target = state.transitions[j].target;
                if (target instanceof PlusBlockStartState) {
                    target.loopBackState = state;
                }
            }
        } else if (state instanceof StarLoopbackState) {
            for (j=0; j<state.transitions.length; j++) {
                target = state.transitions[j].target;
                if (target instanceof StarLoopEntryState) {
                    target.loopBackState = state;
                }
            }
        }
    }
};

ATNDeserializer.prototype.readDecisions = function(atn) {
    var ndecisions = this.readInt();
    for (var i=0; i<ndecisions; i++) {
        var s = this.readInt();
        var decState = atn.states[s];
        atn.decisionToState.push(decState);
        decState.decision = i;
    }
};

ATNDeserializer.prototype.readLexerActions = function(atn) {
    if (atn.grammarType === ATNType.LEXER) {
        var count = this.readInt();
        atn.lexerActions = initArray(count, null);
        for (var i=0; i<count; i++) {
            var actionType = this.readInt();
            var data1 = this.readInt();
            if (data1 === 0xFFFF) {
                data1 = -1;
            }
            var data2 = this.readInt();
            if (data2 === 0xFFFF) {
                data2 = -1;
            }
            var lexerAction = this.lexerActionFactory(actionType, data1, data2);
            atn.lexerActions[i] = lexerAction;
        }
    }
};

ATNDeserializer.prototype.generateRuleBypassTransitions = function(atn) {
	var i;
    var count = atn.ruleToStartState.length;
    for(i=0; i<count; i++) {
        atn.ruleToTokenType[i] = atn.maxTokenType + i + 1;
    }
    for(i=0; i<count; i++) {
        this.generateRuleBypassTransition(atn, i);
    }
};

ATNDeserializer.prototype.generateRuleBypassTransition = function(atn, idx) {
	var i, state;
    var bypassStart = new BasicBlockStartState();
    bypassStart.ruleIndex = idx;
    atn.addState(bypassStart);

    var bypassStop = new BlockEndState();
    bypassStop.ruleIndex = idx;
    atn.addState(bypassStop);

    bypassStart.endState = bypassStop;
    atn.defineDecisionState(bypassStart);

    bypassStop.startState = bypassStart;

    var excludeTransition = null;
    var endState = null;

    if (atn.ruleToStartState[idx].isPrecedenceRule) {
        // wrap from the beginning of the rule to the StarLoopEntryState
        endState = null;
        for(i=0; i<atn.states.length; i++) {
            state = atn.states[i];
            if (this.stateIsEndStateFor(state, idx)) {
                endState = state;
                excludeTransition = state.loopBackState.transitions[0];
                break;
            }
        }
        if (excludeTransition === null) {
            throw ("Couldn't identify final state of the precedence rule prefix section.");
        }
    } else {
        endState = atn.ruleToStopState[idx];
    }

    // all non-excluded transitions that currently target end state need to
	// target blockEnd instead
    for(i=0; i<atn.states.length; i++) {
        state = atn.states[i];
        for(var j=0; j<state.transitions.length; j++) {
            var transition = state.transitions[j];
            if (transition === excludeTransition) {
                continue;
            }
            if (transition.target === endState) {
                transition.target = bypassStop;
            }
        }
    }

    // all transitions leaving the rule start state need to leave blockStart
	// instead
    var ruleToStartState = atn.ruleToStartState[idx];
    var count = ruleToStartState.transitions.length;
    while ( count > 0) {
        bypassStart.addTransition(ruleToStartState.transitions[count-1]);
        ruleToStartState.transitions = ruleToStartState.transitions.slice(-1);
    }
    // link the new states
    atn.ruleToStartState[idx].addTransition(new EpsilonTransition(bypassStart));
    bypassStop.addTransition(new EpsilonTransition(endState));

    var matchState = new BasicState();
    atn.addState(matchState);
    matchState.addTransition(new AtomTransition(bypassStop, atn.ruleToTokenType[idx]));
    bypassStart.addTransition(new EpsilonTransition(matchState));
};

ATNDeserializer.prototype.stateIsEndStateFor = function(state, idx) {
    if ( state.ruleIndex !== idx) {
        return null;
    }
    if (!( state instanceof StarLoopEntryState)) {
        return null;
    }
    var maybeLoopEndState = state.transitions[state.transitions.length - 1].target;
    if (!( maybeLoopEndState instanceof LoopEndState)) {
        return null;
    }
    if (maybeLoopEndState.epsilonOnlyTransitions &&
        (maybeLoopEndState.transitions[0].target instanceof RuleStopState)) {
        return state;
    } else {
        return null;
    }
};

//
// Analyze the {@link StarLoopEntryState} states in the specified ATN to set
// the {@link StarLoopEntryState//isPrecedenceDecision} field to the
// correct value.
//
// @param atn The ATN.
//
ATNDeserializer.prototype.markPrecedenceDecisions = function(atn) {
	for(var i=0; i<atn.states.length; i++) {
		var state = atn.states[i];
		if (!( state instanceof StarLoopEntryState)) {
            continue;
        }
        // We analyze the ATN to determine if this ATN decision state is the
        // decision for the closure block that determines whether a
        // precedence rule should continue or complete.
        //
        if ( atn.ruleToStartState[state.ruleIndex].isPrecedenceRule) {
            var maybeLoopEndState = state.transitions[state.transitions.length - 1].target;
            if (maybeLoopEndState instanceof LoopEndState) {
                if ( maybeLoopEndState.epsilonOnlyTransitions &&
                        (maybeLoopEndState.transitions[0].target instanceof RuleStopState)) {
                    state.isPrecedenceDecision = true;
                }
            }
        }
	}
};

ATNDeserializer.prototype.verifyATN = function(atn) {
    if (!this.deserializationOptions.verifyATN) {
        return;
    }
    // verify assumptions
	for(var i=0; i<atn.states.length; i++) {
        var state = atn.states[i];
        if (state === null) {
            continue;
        }
        this.checkCondition(state.epsilonOnlyTransitions || state.transitions.length <= 1);
        if (state instanceof PlusBlockStartState) {
            this.checkCondition(state.loopBackState !== null);
        } else  if (state instanceof StarLoopEntryState) {
            this.checkCondition(state.loopBackState !== null);
            this.checkCondition(state.transitions.length === 2);
            if (state.transitions[0].target instanceof StarBlockStartState) {
                this.checkCondition(state.transitions[1].target instanceof LoopEndState);
                this.checkCondition(!state.nonGreedy);
            } else if (state.transitions[0].target instanceof LoopEndState) {
                this.checkCondition(state.transitions[1].target instanceof StarBlockStartState);
                this.checkCondition(state.nonGreedy);
            } else {
                throw("IllegalState");
            }
        } else if (state instanceof StarLoopbackState) {
            this.checkCondition(state.transitions.length === 1);
            this.checkCondition(state.transitions[0].target instanceof StarLoopEntryState);
        } else if (state instanceof LoopEndState) {
            this.checkCondition(state.loopBackState !== null);
        } else if (state instanceof RuleStartState) {
            this.checkCondition(state.stopState !== null);
        } else if (state instanceof BlockStartState) {
            this.checkCondition(state.endState !== null);
        } else if (state instanceof BlockEndState) {
            this.checkCondition(state.startState !== null);
        } else if (state instanceof DecisionState) {
            this.checkCondition(state.transitions.length <= 1 || state.decision >= 0);
        } else {
            this.checkCondition(state.transitions.length <= 1 || (state instanceof RuleStopState));
        }
	}
};

ATNDeserializer.prototype.checkCondition = function(condition, message) {
    if (!condition) {
        if (message === undefined || message===null) {
            message = "IllegalState";
        }
        throw (message);
    }
};

ATNDeserializer.prototype.readInt = function() {
    return this.data[this.pos++];
};

ATNDeserializer.prototype.readInt32 = function() {
    var low = this.readInt();
    var high = this.readInt();
    return low | (high << 16);
};

ATNDeserializer.prototype.readLong = function() {
    var low = this.readInt32();
    var high = this.readInt32();
    return (low & 0x00000000FFFFFFFF) | (high << 32);
};

function createByteToHex() {
	var bth = [];
	for (var i = 0; i < 256; i++) {
		bth[i] = (i + 0x100).toString(16).substr(1).toUpperCase();
	}
	return bth;
}

var byteToHex = createByteToHex();

ATNDeserializer.prototype.readUUID = function() {
	var bb = [];
	for(var i=7;i>=0;i--) {
		var int = this.readInt();
		/* jshint bitwise: false */
		bb[(2*i)+1] = int & 0xFF;
		bb[2*i] = (int >> 8) & 0xFF;
	}
    return byteToHex[bb[0]] + byteToHex[bb[1]] +
    byteToHex[bb[2]] + byteToHex[bb[3]] + '-' +
    byteToHex[bb[4]] + byteToHex[bb[5]] + '-' +
    byteToHex[bb[6]] + byteToHex[bb[7]] + '-' +
    byteToHex[bb[8]] + byteToHex[bb[9]] + '-' +
    byteToHex[bb[10]] + byteToHex[bb[11]] +
    byteToHex[bb[12]] + byteToHex[bb[13]] +
    byteToHex[bb[14]] + byteToHex[bb[15]];
};

ATNDeserializer.prototype.edgeFactory = function(atn, type, src, trg, arg1, arg2, arg3, sets) {
    var target = atn.states[trg];
    switch(type) {
    case Transition.EPSILON:
        return new EpsilonTransition(target);
    case Transition.RANGE:
        return arg3 !== 0 ? new RangeTransition(target, Token.EOF, arg2) : new RangeTransition(target, arg1, arg2);
    case Transition.RULE:
        return new RuleTransition(atn.states[arg1], arg2, arg3, target);
    case Transition.PREDICATE:
        return new PredicateTransition(target, arg1, arg2, arg3 !== 0);
    case Transition.PRECEDENCE:
        return new PrecedencePredicateTransition(target, arg1);
    case Transition.ATOM:
        return arg3 !== 0 ? new AtomTransition(target, Token.EOF) : new AtomTransition(target, arg1);
    case Transition.ACTION:
        return new ActionTransition(target, arg1, arg2, arg3 !== 0);
    case Transition.SET:
        return new SetTransition(target, sets[arg1]);
    case Transition.NOT_SET:
        return new NotSetTransition(target, sets[arg1]);
    case Transition.WILDCARD:
        return new WildcardTransition(target);
    default:
        throw "The specified transition type: " + type + " is not valid.";
    }
};

ATNDeserializer.prototype.stateFactory = function(type, ruleIndex) {
    if (this.stateFactories === null) {
        var sf = [];
        sf[ATNState.INVALID_TYPE] = null;
        sf[ATNState.BASIC] = function() { return new BasicState(); };
        sf[ATNState.RULE_START] = function() { return new RuleStartState(); };
        sf[ATNState.BLOCK_START] = function() { return new BasicBlockStartState(); };
        sf[ATNState.PLUS_BLOCK_START] = function() { return new PlusBlockStartState(); };
        sf[ATNState.STAR_BLOCK_START] = function() { return new StarBlockStartState(); };
        sf[ATNState.TOKEN_START] = function() { return new TokensStartState(); };
        sf[ATNState.RULE_STOP] = function() { return new RuleStopState(); };
        sf[ATNState.BLOCK_END] = function() { return new BlockEndState(); };
        sf[ATNState.STAR_LOOP_BACK] = function() { return new StarLoopbackState(); };
        sf[ATNState.STAR_LOOP_ENTRY] = function() { return new StarLoopEntryState(); };
        sf[ATNState.PLUS_LOOP_BACK] = function() { return new PlusLoopbackState(); };
        sf[ATNState.LOOP_END] = function() { return new LoopEndState(); };
        this.stateFactories = sf;
    }
    if (type>this.stateFactories.length || this.stateFactories[type] === null) {
        throw("The specified state type " + type + " is not valid.");
    } else {
        var s = this.stateFactories[type]();
        if (s!==null) {
            s.ruleIndex = ruleIndex;
            return s;
        }
    }
};

ATNDeserializer.prototype.lexerActionFactory = function(type, data1, data2) {
    if (this.actionFactories === null) {
        var af = [];
        af[LexerActionType.CHANNEL] = function(data1, data2) { return new LexerChannelAction(data1); };
        af[LexerActionType.CUSTOM] = function(data1, data2) { return new LexerCustomAction(data1, data2); };
        af[LexerActionType.MODE] = function(data1, data2) { return new LexerModeAction(data1); };
        af[LexerActionType.MORE] = function(data1, data2) { return LexerMoreAction.INSTANCE; };
        af[LexerActionType.POP_MODE] = function(data1, data2) { return LexerPopModeAction.INSTANCE; };
        af[LexerActionType.PUSH_MODE] = function(data1, data2) { return new LexerPushModeAction(data1); };
        af[LexerActionType.SKIP] = function(data1, data2) { return LexerSkipAction.INSTANCE; };
        af[LexerActionType.TYPE] = function(data1, data2) { return new LexerTypeAction(data1); };
        this.actionFactories = af;
    }
    if (type>this.actionFactories.length || this.actionFactories[type] === null) {
        throw("The specified lexer action type " + type + " is not valid.");
    } else {
        return this.actionFactories[type](data1, data2);
    }
};


exports.ATNDeserializer = ATNDeserializer;