Examples with ATN org.antlr.v4.runtime.atn.ATN used on opensource projects

Example 26 with ATN

use of org.antlr.v4.runtime.atn.ATN in project antlr4 by antlr.

the class TestATNSerialization method testLexerNotSet.

@Test
public void testLexerNotSet() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "ID : ~('a'|'b')\n ;");
    String expecting = "max type 1\n" + "0:TOKEN_START -1\n" + "1:RULE_START 0\n" + "2:RULE_STOP 0\n" + "3:BASIC 0\n" + "4:BASIC 0\n" + "rule 0:1 1\n" + "mode 0:0\n" + "0:'a'..'b'\n" + "0->1 EPSILON 0,0,0\n" + "1->3 EPSILON 0,0,0\n" + "3->4 NOT_SET 0,0,0\n" + "4->2 EPSILON 0,0,0\n" + "0:0\n";
    ATN atn = createATN(lg, true);
    String result = ATNSerializer.getDecoded(atn, Arrays.asList(lg.getTokenNames()));
    assertEquals(expecting, result);
}

Example 27 with ATN

use of org.antlr.v4.runtime.atn.ATN in project antlr4 by antlr.

the class TestATNLexerInterpreter method checkLexerMatches.

protected void checkLexerMatches(LexerGrammar lg, String inputString, String expecting) {
    ATN atn = createATN(lg, true);
    CharStream input = CharStreams.fromString(inputString);
    ATNState startState = atn.modeNameToStartState.get("DEFAULT_MODE");
    DOTGenerator dot = new DOTGenerator(lg);
    //		System.out.println(dot.getDOT(startState, true));
    List<String> tokenTypes = getTokenTypes(lg, atn, input);
    String result = Utils.join(tokenTypes.iterator(), ", ");
    //		System.out.println(tokenTypes);
    assertEquals(expecting, result);
}

Example 28 with ATN

use of org.antlr.v4.runtime.atn.ATN in project antlr4 by antlr.

the class TestATNDeserialization method checkDeserializationIsStable.

protected void checkDeserializationIsStable(Grammar g) {
    ATN atn = createATN(g, false);
    char[] data = Utils.toCharArray(ATNSerializer.getSerialized(atn));
    String atnData = ATNSerializer.getDecoded(atn, Arrays.asList(g.getTokenNames()));
    ATN atn2 = new ATNDeserializer().deserialize(data);
    String atn2Data = ATNSerializer.getDecoded(atn2, Arrays.asList(g.getTokenNames()));
    assertEquals(atnData, atn2Data);
}

Example 29 with ATN

use of org.antlr.v4.runtime.atn.ATN in project antlr4 by antlr.

the class SwiftTarget method getLexerOrParserATNJson.

private String getLexerOrParserATNJson(Grammar g, String fileName) {
    ST extST = getTemplates().getInstanceOf("codeFileExtension");
    String className = fileName.substring(0, fileName.lastIndexOf(extST.render()));
    String JSON = "class " + className + "ATN {\n" + "    let jsonString: String = \"" + serializeTojson(g.atn).replaceAll("\"", "\\\\\"") + //.replaceAll("\"", "\\\\\"");
    "\"\n}";
    return JSON;
}

Example 30 with ATN

use of org.antlr.v4.runtime.atn.ATN in project antlr4 by antlr.

the class SwiftTarget method serializeTojson.

//added by janyou -->
public String serializeTojson(ATN atn) {
    JsonObjectBuilder builder = Json.createObjectBuilder();
    builder.add("version", ATNDeserializer.SERIALIZED_VERSION);
    builder.add("uuid", ATNDeserializer.SERIALIZED_UUID.toString());
    // convert grammar type to ATN const to avoid dependence on ANTLRParser
    builder.add("grammarType", atn.grammarType.ordinal());
    builder.add("maxTokenType", atn.maxTokenType);
    //states
    int nedges = 0;
    Map<IntervalSet, Integer> setIndices = new HashMap<IntervalSet, Integer>();
    List<IntervalSet> sets = new ArrayList<IntervalSet>();
    JsonArrayBuilder statesBuilder = Json.createArrayBuilder();
    IntegerList nonGreedyStates = new IntegerList();
    IntegerList precedenceStates = new IntegerList();
    for (ATNState s : atn.states) {
        JsonObjectBuilder stateBuilder = Json.createObjectBuilder();
        if (s == null) {
            // might be optimized away
            statesBuilder.addNull();
            continue;
        }
        int stateType = s.getStateType();
        stateBuilder.add("stateType", stateType);
        //stateBuilder.add("stateNumber",s.stateNumber);
        stateBuilder.add("ruleIndex", s.ruleIndex);
        if (s instanceof DecisionState && ((DecisionState) s).nonGreedy) {
            nonGreedyStates.add(s.stateNumber);
        }
        if (s instanceof RuleStartState && ((RuleStartState) s).isLeftRecursiveRule) {
            precedenceStates.add(s.stateNumber);
        }
        if (s.getStateType() == ATNState.LOOP_END) {
            stateBuilder.add("detailStateNumber", ((LoopEndState) s).loopBackState.stateNumber);
        } else if (s instanceof BlockStartState) {
            stateBuilder.add("detailStateNumber", ((BlockStartState) s).endState.stateNumber);
        }
        if (s.getStateType() != ATNState.RULE_STOP) {
            // the deserializer can trivially derive these edges, so there's no need to serialize them
            nedges += s.getNumberOfTransitions();
        }
        for (int i = 0; i < s.getNumberOfTransitions(); i++) {
            Transition t = s.transition(i);
            int edgeType = Transition.serializationTypes.get(t.getClass());
            if (edgeType == Transition.SET || edgeType == Transition.NOT_SET) {
                SetTransition st = (SetTransition) t;
                if (!setIndices.containsKey(st.set)) {
                    sets.add(st.set);
                    setIndices.put(st.set, sets.size() - 1);
                }
            }
        }
        statesBuilder.add(stateBuilder);
    }
    builder.add("states", statesBuilder);
    // non-greedy states
    JsonArrayBuilder nonGreedyStatesBuilder = Json.createArrayBuilder();
    for (int i = 0; i < nonGreedyStates.size(); i++) {
        nonGreedyStatesBuilder.add(nonGreedyStates.get(i));
    }
    builder.add("nonGreedyStates", nonGreedyStatesBuilder);
    // precedence states
    JsonArrayBuilder precedenceStatesBuilder = Json.createArrayBuilder();
    for (int i = 0; i < precedenceStates.size(); i++) {
        precedenceStatesBuilder.add(precedenceStates.get(i));
    }
    builder.add("precedenceStates", precedenceStatesBuilder);
    JsonArrayBuilder ruleToStartStateBuilder = Json.createArrayBuilder();
    int nrules = atn.ruleToStartState.length;
    for (int r = 0; r < nrules; r++) {
        JsonObjectBuilder stateBuilder = Json.createObjectBuilder();
        ATNState ruleStartState = atn.ruleToStartState[r];
        stateBuilder.add("stateNumber", ruleStartState.stateNumber);
        if (atn.grammarType == ATNType.LEXER) {
            //				if (atn.ruleToTokenType[r] == Token.EOF) {
            //					//data.add(Character.MAX_VALUE);
            //					stateBuilder.add("ruleToTokenType",-1);
            //				}
            //				else {
            //					//data.add(atn.ruleToTokenType[r]);
            stateBuilder.add("ruleToTokenType", atn.ruleToTokenType[r]);
        //				}
        }
        ruleToStartStateBuilder.add(stateBuilder);
    }
    builder.add("ruleToStartState", ruleToStartStateBuilder);
    JsonArrayBuilder modeToStartStateBuilder = Json.createArrayBuilder();
    int nmodes = atn.modeToStartState.size();
    if (nmodes > 0) {
        for (ATNState modeStartState : atn.modeToStartState) {
            modeToStartStateBuilder.add(modeStartState.stateNumber);
        }
    }
    builder.add("modeToStartState", modeToStartStateBuilder);
    JsonArrayBuilder nsetsBuilder = Json.createArrayBuilder();
    int nsets = sets.size();
    //data.add(nsets);
    builder.add("nsets", nsets);
    for (IntervalSet set : sets) {
        JsonObjectBuilder setBuilder = Json.createObjectBuilder();
        boolean containsEof = set.contains(Token.EOF);
        if (containsEof && set.getIntervals().get(0).b == Token.EOF) {
            //data.add(set.getIntervals().size() - 1);
            setBuilder.add("size", set.getIntervals().size() - 1);
        } else {
            //data.add(set.getIntervals().size());
            setBuilder.add("size", set.getIntervals().size());
        }
        setBuilder.add("containsEof", containsEof ? 1 : 0);
        JsonArrayBuilder IntervalsBuilder = Json.createArrayBuilder();
        for (Interval I : set.getIntervals()) {
            JsonObjectBuilder IntervalBuilder = Json.createObjectBuilder();
            if (I.a == Token.EOF) {
                if (I.b == Token.EOF) {
                    continue;
                } else {
                    IntervalBuilder.add("a", 0);
                //data.add(0);
                }
            } else {
                IntervalBuilder.add("a", I.a);
            //data.add(I.a);
            }
            IntervalBuilder.add("b", I.b);
            IntervalsBuilder.add(IntervalBuilder);
        }
        setBuilder.add("Intervals", IntervalsBuilder);
        nsetsBuilder.add(setBuilder);
    }
    builder.add("IntervalSet", nsetsBuilder);
    //builder.add("nedges",nedges);
    JsonArrayBuilder allTransitionsBuilder = Json.createArrayBuilder();
    for (ATNState s : atn.states) {
        if (s == null) {
            // might be optimized away
            continue;
        }
        if (s.getStateType() == ATNState.RULE_STOP) {
            continue;
        }
        JsonArrayBuilder transitionsBuilder = Json.createArrayBuilder();
        for (int i = 0; i < s.getNumberOfTransitions(); i++) {
            JsonObjectBuilder transitionBuilder = Json.createObjectBuilder();
            Transition t = s.transition(i);
            if (atn.states.get(t.target.stateNumber) == null) {
                throw new IllegalStateException("Cannot serialize a transition to a removed state.");
            }
            int src = s.stateNumber;
            int trg = t.target.stateNumber;
            int edgeType = Transition.serializationTypes.get(t.getClass());
            int arg1 = 0;
            int arg2 = 0;
            int arg3 = 0;
            switch(edgeType) {
                case Transition.RULE:
                    trg = ((RuleTransition) t).followState.stateNumber;
                    arg1 = ((RuleTransition) t).target.stateNumber;
                    arg2 = ((RuleTransition) t).ruleIndex;
                    arg3 = ((RuleTransition) t).precedence;
                    break;
                case Transition.PRECEDENCE:
                    PrecedencePredicateTransition ppt = (PrecedencePredicateTransition) t;
                    arg1 = ppt.precedence;
                    break;
                case Transition.PREDICATE:
                    PredicateTransition pt = (PredicateTransition) t;
                    arg1 = pt.ruleIndex;
                    arg2 = pt.predIndex;
                    arg3 = pt.isCtxDependent ? 1 : 0;
                    break;
                case Transition.RANGE:
                    arg1 = ((RangeTransition) t).from;
                    arg2 = ((RangeTransition) t).to;
                    if (arg1 == Token.EOF) {
                        arg1 = 0;
                        arg3 = 1;
                    }
                    break;
                case Transition.ATOM:
                    arg1 = ((AtomTransition) t).label;
                    if (arg1 == Token.EOF) {
                        arg1 = 0;
                        arg3 = 1;
                    }
                    break;
                case Transition.ACTION:
                    ActionTransition at = (ActionTransition) t;
                    arg1 = at.ruleIndex;
                    arg2 = at.actionIndex;
                    //						if (arg2 == -1) {
                    //							arg2 = 0xFFFF;
                    //						}
                    arg3 = at.isCtxDependent ? 1 : 0;
                    break;
                case Transition.SET:
                    arg1 = setIndices.get(((SetTransition) t).set);
                    break;
                case Transition.NOT_SET:
                    arg1 = setIndices.get(((SetTransition) t).set);
                    break;
                case Transition.WILDCARD:
                    break;
            }
            transitionBuilder.add("src", src);
            transitionBuilder.add("trg", trg);
            transitionBuilder.add("edgeType", edgeType);
            transitionBuilder.add("arg1", arg1);
            transitionBuilder.add("arg2", arg2);
            transitionBuilder.add("arg3", arg3);
            transitionsBuilder.add(transitionBuilder);
        }
        allTransitionsBuilder.add(transitionsBuilder);
    }
    builder.add("allTransitionsBuilder", allTransitionsBuilder);
    int ndecisions = atn.decisionToState.size();
    //data.add(ndecisions);
    JsonArrayBuilder decisionToStateBuilder = Json.createArrayBuilder();
    for (DecisionState decStartState : atn.decisionToState) {
        //data.add(decStartState.stateNumber);
        decisionToStateBuilder.add(decStartState.stateNumber);
    }
    builder.add("decisionToState", decisionToStateBuilder);
    //
    // LEXER ACTIONS
    //
    JsonArrayBuilder lexerActionsBuilder = Json.createArrayBuilder();
    if (atn.grammarType == ATNType.LEXER) {
        //data.add(atn.lexerActions.length);
        for (LexerAction action : atn.lexerActions) {
            JsonObjectBuilder lexerActionBuilder = Json.createObjectBuilder();
            lexerActionBuilder.add("actionType", action.getActionType().ordinal());
            //data.add(action.getActionType().ordinal());
            switch(action.getActionType()) {
                case CHANNEL:
                    int channel = ((LexerChannelAction) action).getChannel();
                    lexerActionBuilder.add("a", channel);
                    lexerActionBuilder.add("b", 0);
                    break;
                case CUSTOM:
                    int ruleIndex = ((LexerCustomAction) action).getRuleIndex();
                    int actionIndex = ((LexerCustomAction) action).getActionIndex();
                    lexerActionBuilder.add("a", ruleIndex);
                    lexerActionBuilder.add("b", actionIndex);
                    break;
                case MODE:
                    int mode = ((LexerModeAction) action).getMode();
                    lexerActionBuilder.add("a", mode);
                    lexerActionBuilder.add("b", 0);
                    break;
                case MORE:
                    lexerActionBuilder.add("a", 0);
                    lexerActionBuilder.add("b", 0);
                    break;
                case POP_MODE:
                    lexerActionBuilder.add("a", 0);
                    lexerActionBuilder.add("b", 0);
                    break;
                case PUSH_MODE:
                    mode = ((LexerPushModeAction) action).getMode();
                    lexerActionBuilder.add("a", mode);
                    lexerActionBuilder.add("b", 0);
                    break;
                case SKIP:
                    lexerActionBuilder.add("a", 0);
                    lexerActionBuilder.add("b", 0);
                    break;
                case TYPE:
                    int type = ((LexerTypeAction) action).getType();
                    lexerActionBuilder.add("a", type);
                    lexerActionBuilder.add("b", 0);
                    break;
                default:
                    String message = String.format(Locale.getDefault(), "The specified lexer action type %s is not valid.", action.getActionType());
                    throw new IllegalArgumentException(message);
            }
            lexerActionsBuilder.add(lexerActionBuilder);
        }
    }
    builder.add("lexerActions", lexerActionsBuilder);
    // don't adjust the first value since that's the version number
    //		for (int i = 1; i < data.size(); i++) {
    //			if (data.get(i) < Character.MIN_VALUE || data.get(i) > Character.MAX_VALUE) {
    //				throw new UnsupportedOperationException("Serialized ATN data element out of range.");
    //			}
    //
    //			int value = (data.get(i) + 2) & 0xFFFF;
    //			data.set(i, value);
    //		}
    JsonObject data = builder.build();
    //  System.out.print(data.toString());
    return data.toString();
}