[antlr-interest] Re: Parser question

kevthefree kevthefree at yahoo.com.hk
Wed Nov 12 16:10:41 PST 2003


--- In antlr-interest at yahoogroups.com, "micheal_jor" <open.zone at v...>
wrote:
> --- In antlr-interest at yahoogroups.com, "kevthefree" <kevthefree at y...>
> wrote:
> > Hi all,
> > 
> > I am completely new to ANTLR, I am trying to write a parser with lexer
> > in ANTLR to parse a basic C function.
> > 
> > What do I need to do to check whether a parse has been succeed? (I
> > pipe a test text file which contains a c function and it seems to
> > return to the prompt without any exception, is that a success parse?)
> > I don't know much about ANTLR.
> > 
> > Any help would be appreciated
> 
> Kevin,
> 

Oh, sorry, I didn't read this message when I sent the other one, thank
you very much for your help, really appreciated it ^_^
Could you send me your e-mail address just in case I have further
questions??


> Your message suggests that you know enough about ANTLR to have built a
> candidate grammar for your project. So, you could:
> a) ensure that the grammar builds a tree
>    http://www.antlr.org/doc/options.html#_bb12
> b) use the getAST() method of the parser to get the tree after parsing
> c) use one of the toStringList()/toStringTree() methods to print the
tree.
> d) compare the tree to what you expected your grammar to generate for
> the given input
> 
> See the comments in the test.g of the ASTSupport example for more info
> on ANTLR trees, visualization and tree notation.
> 
> This article might help too: 
>    http://www.cs.usfca.edu/~parrt/course/652/lectures/antlr.html
> 
> You can find more tutorials here:
>    http://www.antlr.org/doc/getting-started.html
> 
> Cheers,
> 
> Micheal
> ANTLR/C#
> 
> PS   For more advanced visualization, have a look at the ASTFrame
> class (only available for C# and Java output). The java grammar sample
> uses this class to display the AST.


 

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