Detail CLR specification

Thanks for the suggesstion Can u provide me some example of the datastructure u are talking about. I am really in trouble with this as i have no prior knowledge building a compiler . THanks

If you're processing XML as your language, you do not need to use any parser/lexer generator tools because .net already comes with libraries for processing XML files. Your first step should be to create your datastructes that mimic the program structure. classes: Program that holds Variables and Statements Variable holds type, datatype, name and value Statement - root class for other statements AssignmentStatment extends Statement - holds LValue and RValue Expression - root class for expressions BinaryExpression - holds LHS, Operator and RHS VariableExpression - expression that references variable LiteralExpression - expression that is literal value then you write your logic to process XML and create the Program class with all statements. then you write processing logic that takes Program and processes it recursively. The processing part you can almost just copy/paste from my calculator example and it's independent of the language and only depends on AST (Program, Statements, Expression in your case)

The one I have on my website was just a way to test antlr and is a really small language. Antlr is a tool that given a grammar file (*.g file) it will generate parser/lexer for you. That's the first step. Create your grammar which will define syntax of the language. You can also have antlr create AST for you, but I usually prefer to write my own so that it's more like the language I'm working with and easier to manipulate. Then you take your AST and process it depending on your language and how you want it work. For a compiler, you next step most likely would be type-checker, optimizer and code generator. For the simple interpreter I have, I just interpreter the program directly on AST, which makes it very simple.

Thanks Werdna It will be helpful. Can u pls tell me what are the initial steps u take building the compiler/interpreter. What is the purpose of Antlr and what are the design goals of yours. H0w long it take you to build such a wonderful interpreter.

You don't really need CLR or MSIL docs to build interpreter. For an example you can look at my basic interpreter at http://www.adersoftware.com/?page=compilers If you do need to do the interpreter by converting to MSIL first there is a good book: http://www.amazon.com/exec/obidos/tg/detail/-/0735615470/102-1807977-6402519?v=glance You can download CLI standard from: http://www.ecma-international.org/publications/standards/Ecma-335.htm