[antlr-interest] C# Just starting with Parsers, Trees
Doc In Nuke
docinnuke at gmail.com
Thu May 22 08:42:56 PDT 2008
Here is what I did:
Took the lua grammar
generated a parser and lexer with it in csharp. I also added the
This without modifying the rules. This generated 2 classes
used the following code:
ANTLRFileStream afs = new ANTLRFileStream("LuaFile/queue.lua");
LuaLexer lexer = new LuaLexer(afs);
CommonTokenStream cts = new CommonTokenStream();
cts.TokenSource = lexer;
LuaParser parser = new LuaParser(cts);
LuaParser.chunk_return r = parser.chunk();
CommonTree t = (CommonTree)r.Tree;
CommonTreeNodeStream nodes = new CommonTreeNodeStream(t);
now,t is flat if I only do that. This is why I started trying stuff with
the tree syntax. And since I am not english I do not really understand
all the documentation available :(
So the more general question would be, how do I get a real tree from
that, either by modifying the grammar, or do I need to create some code
I would love to know how I get the $funcname.Text stuff in my code :)
Haralambi Haralambiev wrote:
> I was wondering - what is the purpose of collecting all the nodes into
> What difficulties do you encounter in the current state of the tree -
> maybe this could be solved in an eaiser way?
> For example, if you just need the name of the function, you could
> always use $funcname.text and this will get everything in one place.
> Best Regards,
> On 5/22/08, *Doc In Nuke* <docinnuke at gmail.com
> <mailto:docinnuke at gmail.com>> wrote:
> Hi @ all
> First of all let me apologize for the english mistakes you will
> surely find in this message.
> So, I just started working with ANTLR a few days ago.
> I was able to generate a parser and lexer for the lua grammar
> provided on the site.
> Now I also was able to create nodes / sub trees using the ^
> parameter in the grammar.
> I also modified the grammar a bit to try to generate what i really
> wanted in the end.
> One of the rule i added for exemple is the following one:
> globalfuncdec : 'function' ^ funcname funcbody ;
> so for every global function (declaration not starting with local)
> i get a subtree with the funcname and funcbody block.
> Now what would really be nice is a way to get the funcname as 1
> token and not more.
> funcname is the following rule:
> funcname : NAME ('.' NAME)* (':' NAME)? ;
> in the same way having just a childnode named funcbody with all
> the stuff related to funcbody under it would be great.
> So i would have something like that:
> / \
> funcname/value funcbody
> / \
> stuff_1 ... stuff_n
> So I was wondering if one can do such a thing, and if yes, how ?
> Best Regards,
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