Examples with Interval org.antlr.v4.runtime.misc.Interval used on opensource projects

Example 11 with Interval

use of org.antlr.v4.runtime.misc.Interval in project antlr4 by antlr.

the class Trees method stripChildrenOutOfRange.

/** Replace any subtree siblings of root that are completely to left
	 *  or right of lookahead range with a CommonToken(Token.INVALID_TYPE,"...")
	 *  node. The source interval for t is not altered to suit smaller range!
	 *
	 *  WARNING: destructive to t.
	 *
	 *  @since 4.5.1
	 */
public static void stripChildrenOutOfRange(ParserRuleContext t, ParserRuleContext root, int startIndex, int stopIndex) {
    if (t == null)
        return;
    for (int i = 0; i < t.getChildCount(); i++) {
        ParseTree child = t.getChild(i);
        Interval range = child.getSourceInterval();
        if (child instanceof ParserRuleContext && (range.b < startIndex || range.a > stopIndex)) {
            if (isAncestorOf(child, root)) {
                // replace only if subtree doesn't have displayed root
                CommonToken abbrev = new CommonToken(Token.INVALID_TYPE, "...");
                t.children.set(i, new TerminalNodeImpl(abbrev));
            }
        }
    }
}

Example 12 with Interval

use of org.antlr.v4.runtime.misc.Interval in project antlr4 by antlr.

the class LexerATNFactory method set.

@Override
public Handle set(GrammarAST associatedAST, List<GrammarAST> alts, boolean invert) {
    ATNState left = newState(associatedAST);
    ATNState right = newState(associatedAST);
    IntervalSet set = new IntervalSet();
    for (GrammarAST t : alts) {
        if (t.getType() == ANTLRParser.RANGE) {
            int a = CharSupport.getCharValueFromGrammarCharLiteral(t.getChild(0).getText());
            int b = CharSupport.getCharValueFromGrammarCharLiteral(t.getChild(1).getText());
            if (checkRange((GrammarAST) t.getChild(0), (GrammarAST) t.getChild(1), a, b)) {
                checkSetCollision(associatedAST, set, a, b);
                set.add(a, b);
            }
        } else if (t.getType() == ANTLRParser.LEXER_CHAR_SET) {
            set.addAll(getSetFromCharSetLiteral(t));
        } else if (t.getType() == ANTLRParser.STRING_LITERAL) {
            int c = CharSupport.getCharValueFromGrammarCharLiteral(t.getText());
            if (c != -1) {
                checkSetCollision(associatedAST, set, c);
                set.add(c);
            } else {
                g.tool.errMgr.grammarError(ErrorType.INVALID_LITERAL_IN_LEXER_SET, g.fileName, t.getToken(), t.getText());
            }
        } else if (t.getType() == ANTLRParser.TOKEN_REF) {
            g.tool.errMgr.grammarError(ErrorType.UNSUPPORTED_REFERENCE_IN_LEXER_SET, g.fileName, t.getToken(), t.getText());
        }
    }
    if (invert) {
        left.addTransition(new NotSetTransition(right, set));
    } else {
        Transition transition;
        if (set.getIntervals().size() == 1) {
            Interval interval = set.getIntervals().get(0);
            transition = CodePointTransitions.createWithCodePointRange(right, interval.a, interval.b);
        } else {
            transition = new SetTransition(right, set);
        }
        left.addTransition(transition);
    }
    associatedAST.atnState = left;
    return new Handle(left, right);
}

Example 13 with Interval

use of org.antlr.v4.runtime.misc.Interval in project antlr4 by antlr.

the class CharSupport method getIntervalSetEscapedString.

public static String getIntervalSetEscapedString(IntervalSet intervalSet) {
    StringBuilder buf = new StringBuilder();
    Iterator<Interval> iter = intervalSet.getIntervals().iterator();
    while (iter.hasNext()) {
        Interval interval = iter.next();
        buf.append(getRangeEscapedString(interval.a, interval.b));
        if (iter.hasNext()) {
            buf.append(" | ");
        }
    }
    return buf.toString();
}

Example 14 with Interval

use of org.antlr.v4.runtime.misc.Interval in project antlr4 by antlr.

the class TestParserInterpreter method testEmptyFirstRule.

@Test
public void testEmptyFirstRule() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "A : 'a' ;\n");
    Grammar g = new Grammar("parser grammar T;\n" + "s : x A ;\n" + "x : ;\n", lg);
    ParseTree t = testInterp(lg, g, "s", "a", "(s x a)");
    // s
    assertEquals("0..0", t.getSourceInterval().toString());
    // This gets an empty interval because the stop token is null for x
    // x
    assertEquals("0..-1", t.getChild(0).getSourceInterval().toString());
}

Example 15 with Interval

use of org.antlr.v4.runtime.misc.Interval in project antlr4 by antlr.

the class TestUnbufferedCharStream method testGetTextInMarkedRange.

@Test
public void testGetTextInMarkedRange() {
    CharStream input = createStream("xyz");
    input.consume();
    int m1 = input.mark();
    assertEquals(1, input.index());
    input.consume();
    input.consume();
    assertEquals("yz", input.getText(new Interval(1, 2)));
}