Examples of GrammarAST

org.antlr.tool.GrammarAST

Grammars are first converted to ASTs using this class and then are converted to NFAs via a tree walker. The reader may notice that I have made a very non-OO decision in this class to track variables for many different kinds of nodes. It wastes space for nodes that don't need the values and OO principles cry out for a new class type for each kind of node in my tree. I am doing this on purpose for a variety of reasons. I don't like using the type system for different node types; it yields too many damn class files which I hate. Perhaps if I put them all in one file. Most importantly though I hate all the type casting that would have to go on. I would have all sorts of extra work to do. Ick. Anyway, I'm doing all this on purpose, not out of ignorance. ;)

org.antlr.v4.tool.ast.GrammarAST


  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));

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Examples of GrammarAST

Examples of org.antlr.v4.tool.ast.GrammarAST