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POBuilding own C# compiler using ANTLR: Compilation Unit
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  1. POBuilding own C# compiler using ANTLR: Compilation Unit
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    copied!<p>// Create a scanner that reads from the input stream passed to us CSLexer lexer = new CSLexer(new ANTLRFileStream(f)); tokens.TokenSource = lexer;</p> <pre><code>// Create a parser that reads from the scanner CSParser parser = new CSParser(tokens); // start parsing at the compilationUnit rule CSParser.compilation_unit_return x = parser.compilation_unit(); object ast = x.Tree; </code></pre> <p>What can I do with the x which is of compilation_unit_return type, to extract its root , its classes, its methods etc? Do I have to extract its Adaptor out? How do I do that? Note that the compilation_unit_return is defined as such in my CSParser (which is automatically generated by ANTLR):</p> <pre><code>public class compilation_unit_return : ParserRuleReturnScope { private object tree; override public object Tree { get { return tree; } set { tree = (object) value; } } }; </code></pre> <p>However the tree I am getting is of the type object. I run using the debugger and seemed to see that it is of the type BaseTree. But BaseTree is an interface! I don't know how it relates to BaseTree and don't know how to extract details out from this tree. I need to write a visitor which has visit to its class, method, variables.... Tthe ParserRuleReturn class extends from RuleReturnScope and has a start and stop object, which I don't know what it is... Furthermore, there is this TreeVisitor class provided by ANTLR which looks confusing. It requires an Adaptor to be pass as a parameter to its constructor (if not it will use the default CommonTreeAdaptor), tt's why I asked abt the how to obtain the Adaptor eariler on. And other issues too... For the API, u can refer to <a href="http://www.antlr.org/api/CSharp/annotated.html" rel="nofollow noreferrer">http://www.antlr.org/api/CSharp/annotated.html</a></p> <p>Now I am struck here... If u do know anything, pls help out. Thanks a million.</p>
 

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