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

Example 91 with ATN

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

the class BaseGoTest method checkRuleATN.

void checkRuleATN(Grammar g, String ruleName, String expecting) {
    ParserATNFactory f = new ParserATNFactory(g);
    ATN atn = f.createATN();
    DOTGenerator dot = new DOTGenerator(g);
    System.out.println(dot.getDOT(atn.ruleToStartState[g.getRule(ruleName).index]));
    Rule r = g.getRule(ruleName);
    ATNState startState = atn.ruleToStartState[r.index];
    ATNPrinter serializer = new ATNPrinter(g, startState);
    String result = serializer.asString();
    // System.out.print(result);
    assertEquals(expecting, result);
}

Example 92 with ATN

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

the class BaseJavaTest method createATN.

protected ATN createATN(Grammar g, boolean useSerializer) {
    if (g.atn == null) {
        semanticProcess(g);
        assertEquals(0, g.tool.getNumErrors());
        ParserATNFactory f;
        if (g.isLexer()) {
            f = new LexerATNFactory((LexerGrammar) g);
        } else {
            f = new ParserATNFactory(g);
        }
        g.atn = f.createATN();
        assertEquals(0, g.tool.getNumErrors());
    }
    ATN atn = g.atn;
    if (useSerializer) {
        char[] serialized = ATNSerializer.getSerializedAsChars(atn);
        return new ATNDeserializer().deserialize(serialized);
    }
    return atn;
}

Example 93 with ATN

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

the class BaseCppTest method checkRuleATN.

void checkRuleATN(Grammar g, String ruleName, String expecting) {
    ParserATNFactory f = new ParserATNFactory(g);
    ATN atn = f.createATN();
    DOTGenerator dot = new DOTGenerator(g);
    System.out.println(dot.getDOT(atn.ruleToStartState[g.getRule(ruleName).index]));
    Rule r = g.getRule(ruleName);
    ATNState startState = atn.ruleToStartState[r.index];
    ATNPrinter serializer = new ATNPrinter(g, startState);
    String result = serializer.asString();
    //System.out.print(result);
    assertEquals(expecting, result);
}

Example 94 with ATN

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

the class TestATNParserPrediction method checkDFAConstruction.

public void checkDFAConstruction(LexerGrammar lg, Grammar g, int decision, String[] inputString, String[] dfaString) {
    //		Tool.internalOption_ShowATNConfigsInDFA = true;
    ATN lexatn = createATN(lg, true);
    LexerATNSimulator lexInterp = new LexerATNSimulator(lexatn, new DFA[] { new DFA(lexatn.getDecisionState(Lexer.DEFAULT_MODE)) }, new PredictionContextCache());
    semanticProcess(lg);
    g.importVocab(lg);
    semanticProcess(g);
    ParserInterpreterForTesting interp = new ParserInterpreterForTesting(g, null);
    for (int i = 0; i < inputString.length; i++) {
        // Check DFA
        IntegerList types = getTokenTypesViaATN(inputString[i], lexInterp);
        //			System.out.println(types);
        TokenStream input = new IntTokenStream(types);
        try {
            interp.adaptivePredict(input, decision, ParserRuleContext.EMPTY);
        } catch (NoViableAltException nvae) {
            nvae.printStackTrace(System.err);
        }
        DFA dfa = interp.parser.decisionToDFA[decision];
        assertEquals(dfaString[i], dfa.toString(g.getVocabulary()));
    }
}

Example 95 with ATN

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

the class TestATNSerialization method testLexerNotLiteral.

@Test
public void testLexerNotLiteral() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "INT : ~'a' ;");
    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'..'a'\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);
}