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

Example 51 with NotNull

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

the class LexerATNFactory method createLexerAction.

@Nullable
private LexerAction createLexerAction(@NotNull GrammarAST ID, @Nullable GrammarAST arg) {
    String command = ID.getText();
    checkCommands(command, ID.getToken());
    if ("skip".equals(command) && arg == null) {
        return LexerSkipAction.INSTANCE;
    } else if ("more".equals(command) && arg == null) {
        return LexerMoreAction.INSTANCE;
    } else if ("popMode".equals(command) && arg == null) {
        return LexerPopModeAction.INSTANCE;
    } else if ("mode".equals(command) && arg != null) {
        String modeName = arg.getText();
        Integer mode = getModeConstantValue(modeName, arg.getToken());
        if (mode == null) {
            return null;
        }
        return new LexerModeAction(mode);
    } else if ("pushMode".equals(command) && arg != null) {
        String modeName = arg.getText();
        Integer mode = getModeConstantValue(modeName, arg.getToken());
        if (mode == null) {
            return null;
        }
        return new LexerPushModeAction(mode);
    } else if ("type".equals(command) && arg != null) {
        String typeName = arg.getText();
        Integer type = getTokenConstantValue(typeName, arg.getToken());
        if (type == null) {
            return null;
        }
        return new LexerTypeAction(type);
    } else if ("channel".equals(command) && arg != null) {
        String channelName = arg.getText();
        Integer channel = getChannelConstantValue(channelName, arg.getToken());
        if (channel == null) {
            return null;
        }
        return new LexerChannelAction(channel);
    } else {
        return null;
    }
}

Example 52 with NotNull

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

the class ParserATNFactory method plus.

/**
 * From {@code (blk)+} build
 *
 * <pre>
 *   |---------|
 *   v         |
 *  [o-blk-o]-&gt;o-&gt;o
 * </pre>
 *
 * We add a decision for loop back node to the existing one at {@code blk}
 * start.
 */
@NotNull
@Override
public Handle plus(@NotNull GrammarAST plusAST, @NotNull Handle blk) {
    PlusBlockStartState blkStart = (PlusBlockStartState) blk.left;
    BlockEndState blkEnd = (BlockEndState) blk.right;
    preventEpsilonClosureBlocks.add(Tuple.create(currentRule, blkStart, blkEnd));
    PlusLoopbackState loop = newState(PlusLoopbackState.class, plusAST);
    loop.nonGreedy = !((QuantifierAST) plusAST).isGreedy();
    // no way to express SLL restriction
    loop.sll = false;
    atn.defineDecisionState(loop);
    LoopEndState end = newState(LoopEndState.class, plusAST);
    blkStart.loopBackState = loop;
    end.loopBackState = loop;
    plusAST.atnState = loop;
    // blk can see loop back
    epsilon(blkEnd, loop);
    BlockAST blkAST = (BlockAST) plusAST.getChild(0);
    if (((QuantifierAST) plusAST).isGreedy()) {
        if (expectNonGreedy(blkAST)) {
            g.tool.errMgr.grammarError(ErrorType.EXPECTED_NON_GREEDY_WILDCARD_BLOCK, g.fileName, plusAST.getToken(), plusAST.getToken().getText());
        }
        // loop back to start
        epsilon(loop, blkStart);
        // or exit
        epsilon(loop, end);
    } else {
        // if not greedy, priority to exit branch; make it first
        // exit
        epsilon(loop, end);
        // loop back to start
        epsilon(loop, blkStart);
    }
    return new Handle(blkStart, end);
}

Example 53 with NotNull

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

the class ParserATNFactory method wildcard.

/**
 * Build an atom with all possible values in its label.
 */
@NotNull
@Override
public Handle wildcard(@NotNull GrammarAST node) {
    ATNState left = newState(node);
    ATNState right = newState(node);
    left.addTransition(new WildcardTransition(right));
    node.atnState = left;
    return new Handle(left, right);
}

Example 54 with NotNull

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

the class ParserATNFactory method epsilon.

/**
 * From an empty alternative build {@code o-e->o}.
 */
@NotNull
@Override
public Handle epsilon(@NotNull GrammarAST node) {
    ATNState left = newState(node);
    ATNState right = newState(node);
    epsilon(left, right);
    node.atnState = left;
    return new Handle(left, right);
}

Example 55 with NotNull

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

the class ParserATNFactory method epsilon.

protected void epsilon(ATNState a, @NotNull ATNState b, boolean prepend) {
    for (Transition t : a.getTransitions()) {
        if (t.getSerializationType() != Transition.EPSILON) {
            continue;
        }
        if (t.target == b && ((EpsilonTransition) t).outermostPrecedenceReturn() == -1) {
            // This transition was already added
            return;
        }
    }
    if (a != null) {
        int index = prepend ? 0 : a.getNumberOfTransitions();
        a.addTransition(index, new EpsilonTransition(b));
    }
}