Examples with GrammarAST org.antlr.v4.tool.ast.GrammarAST used on opensource projects

Example 76 with GrammarAST

use of org.antlr.v4.tool.ast.GrammarAST in project antlr4 by antlr.

the class SymbolCollector method label.

@Override
public void label(GrammarAST op, GrammarAST ID, GrammarAST element) {
    LabelElementPair lp = new LabelElementPair(g, ID, element, op.getType());
    currentRule.alt[currentOuterAltNumber].labelDefs.map(ID.getText(), lp);
}

Example 77 with GrammarAST

use of org.antlr.v4.tool.ast.GrammarAST in project antlr4 by antlr.

the class OutputModelController method buildNormalRuleFunction.

public void buildNormalRuleFunction(Rule r, RuleFunction function) {
    CodeGenerator gen = delegate.getGenerator();
    // TRIGGER factory functions for rule alts, elements
    GrammarASTAdaptor adaptor = new GrammarASTAdaptor(r.ast.token.getInputStream());
    GrammarAST blk = (GrammarAST) r.ast.getFirstChildWithType(ANTLRParser.BLOCK);
    CommonTreeNodeStream nodes = new CommonTreeNodeStream(adaptor, blk);
    walker = new SourceGenTriggers(nodes, this);
    try {
        // walk AST of rule alts/elements
        function.code = DefaultOutputModelFactory.list(walker.block(null, null));
        function.hasLookaheadBlock = walker.hasLookaheadBlock;
    } catch (org.antlr.runtime.RecognitionException e) {
        e.printStackTrace(System.err);
    }
    function.ctxType = gen.getTarget().getRuleFunctionContextStructName(function);
    function.postamble = rulePostamble(function, r);
}

Example 78 with GrammarAST

use of org.antlr.v4.tool.ast.GrammarAST in project antlr4 by antlr.

the class ParserFactory method getChoiceBlock.

@Override
public Choice getChoiceBlock(BlockAST blkAST, List<CodeBlockForAlt> alts, GrammarAST labelAST) {
    int decision = ((DecisionState) blkAST.atnState).decision;
    Choice c;
    if (!g.tool.force_atn && AnalysisPipeline.disjoint(g.decisionLOOK.get(decision))) {
        c = getLL1ChoiceBlock(blkAST, alts);
    } else {
        c = getComplexChoiceBlock(blkAST, alts);
    }
    if (labelAST != null) {
        // for x=(...), define x or x_list
        String label = labelAST.getText();
        Decl d = getTokenLabelDecl(label);
        c.label = d;
        getCurrentRuleFunction().addContextDecl(labelAST.getAltLabel(), d);
        if (labelAST.parent.getType() == ANTLRParser.PLUS_ASSIGN) {
            String listLabel = gen.getTarget().getListLabel(label);
            TokenListDecl l = new TokenListDecl(this, listLabel);
            getCurrentRuleFunction().addContextDecl(labelAST.getAltLabel(), l);
        }
    }
    return c;
}

Example 79 with GrammarAST

use of org.antlr.v4.tool.ast.GrammarAST in project antlr4 by antlr.

the class ParserFactory method defineImplicitLabel.

// support
public void defineImplicitLabel(GrammarAST ast, LabeledOp op) {
    Decl d;
    if (ast.getType() == ANTLRParser.SET || ast.getType() == ANTLRParser.WILDCARD) {
        String implLabel = gen.getTarget().getImplicitSetLabel(String.valueOf(ast.token.getTokenIndex()));
        d = getTokenLabelDecl(implLabel);
        ((TokenDecl) d).isImplicit = true;
    } else if (ast.getType() == ANTLRParser.RULE_REF) {
        // a rule reference?
        Rule r = g.getRule(ast.getText());
        String implLabel = gen.getTarget().getImplicitRuleLabel(ast.getText());
        String ctxName = gen.getTarget().getRuleFunctionContextStructName(r);
        d = new RuleContextDecl(this, implLabel, ctxName);
        ((RuleContextDecl) d).isImplicit = true;
    } else {
        String implLabel = gen.getTarget().getImplicitTokenLabel(ast.getText());
        d = getTokenLabelDecl(implLabel);
        ((TokenDecl) d).isImplicit = true;
    }
    op.getLabels().add(d);
    // all labels must be in scope struct in case we exec action out of context
    getCurrentRuleFunction().addContextDecl(ast.getAltLabel(), d);
}

Example 80 with GrammarAST

use of org.antlr.v4.tool.ast.GrammarAST in project antlr4 by antlr.

the class ParserFactory method getLL1EBNFBlock.

@Override
public Choice getLL1EBNFBlock(GrammarAST ebnfRoot, List<CodeBlockForAlt> alts) {
    int ebnf = 0;
    if (ebnfRoot != null)
        ebnf = ebnfRoot.getType();
    Choice c = null;
    switch(ebnf) {
        case ANTLRParser.OPTIONAL:
            if (alts.size() == 1)
                c = new LL1OptionalBlockSingleAlt(this, ebnfRoot, alts);
            else
                c = new LL1OptionalBlock(this, ebnfRoot, alts);
            break;
        case ANTLRParser.CLOSURE:
            if (alts.size() == 1)
                c = new LL1StarBlockSingleAlt(this, ebnfRoot, alts);
            else
                c = getComplexEBNFBlock(ebnfRoot, alts);
            break;
        case ANTLRParser.POSITIVE_CLOSURE:
            if (alts.size() == 1)
                c = new LL1PlusBlockSingleAlt(this, ebnfRoot, alts);
            else
                c = getComplexEBNFBlock(ebnfRoot, alts);
            break;
    }
    return c;
}