Examples with DFA org.antlr.v4.runtime.dfa.DFA used on opensource projects

Example 1 with DFA

use of org.antlr.v4.runtime.dfa.DFA in project antlr4 by antlr.

the class BaseGoTest method getTokenTypes.

public List<String> getTokenTypes(LexerGrammar lg, ATN atn, CharStream input) {
    LexerATNSimulator interp = new LexerATNSimulator(atn, new DFA[] { new DFA(atn.modeToStartState.get(Lexer.DEFAULT_MODE)) }, null);
    List<String> tokenTypes = new ArrayList<String>();
    int ttype;
    boolean hitEOF = false;
    do {
        if (hitEOF) {
            tokenTypes.add("EOF");
            break;
        }
        int t = input.LA(1);
        ttype = interp.match(input, Lexer.DEFAULT_MODE);
        if (ttype == Token.EOF) {
            tokenTypes.add("EOF");
        } else {
            tokenTypes.add(lg.typeToTokenList.get(ttype));
        }
        if (t == IntStream.EOF) {
            hitEOF = true;
        }
    } while (ttype != Token.EOF);
    return tokenTypes;
}

Example 2 with DFA

use of org.antlr.v4.runtime.dfa.DFA in project antlr4 by antlr.

the class BaseCppTest method checkRuleDFA.

void checkRuleDFA(Grammar g, DecisionState blk, String expecting) throws Exception {
    DFA dfa = createDFA(g, blk);
    String result = null;
    if (dfa != null)
        result = dfa.toString();
    assertEquals(expecting, result);
}

Example 3 with DFA

use of org.antlr.v4.runtime.dfa.DFA in project antlr4 by antlr.

the class BaseJavaTest method getTokenTypes.

public List<String> getTokenTypes(LexerGrammar lg, ATN atn, CharStream input) {
    LexerATNSimulator interp = new LexerATNSimulator(atn, new DFA[] { new DFA(atn.modeToStartState.get(Lexer.DEFAULT_MODE)) }, null);
    List<String> tokenTypes = new ArrayList<String>();
    int ttype;
    boolean hitEOF = false;
    do {
        if (hitEOF) {
            tokenTypes.add("EOF");
            break;
        }
        int t = input.LA(1);
        ttype = interp.match(input, Lexer.DEFAULT_MODE);
        if (ttype == Token.EOF) {
            tokenTypes.add("EOF");
        } else {
            tokenTypes.add(lg.typeToTokenList.get(ttype));
        }
        if (t == IntStream.EOF) {
            hitEOF = true;
        }
    } while (ttype != Token.EOF);
    return tokenTypes;
}

Example 4 with DFA

use of org.antlr.v4.runtime.dfa.DFA in project antlr4 by antlr.

the class BaseJavaTest method getTypesFromString.

//	public void minimizeDFA(DFA dfa) {
//		DFAMinimizer dmin = new DFAMinimizer(dfa);
//		dfa.minimized = dmin.minimize();
//	}
IntegerList getTypesFromString(Grammar g, String expecting) {
    IntegerList expectingTokenTypes = new IntegerList();
    if (expecting != null && !expecting.trim().isEmpty()) {
        for (String tname : expecting.replace(" ", "").split(",")) {
            int ttype = g.getTokenType(tname);
            expectingTokenTypes.add(ttype);
        }
    }
    return expectingTokenTypes;
}

Example 5 with DFA

use of org.antlr.v4.runtime.dfa.DFA in project antlr4 by antlr.

the class BaseJavaTest method checkRuleDFA.

void checkRuleDFA(Grammar g, DecisionState blk, String expecting) throws Exception {
    DFA dfa = createDFA(g, blk);
    String result = null;
    if (dfa != null)
        result = dfa.toString();
    assertEquals(expecting, result);
}