[antlr-interest] grammar that separates classpath from class name

[David Boden]

Hi Scott,

I'm a relative Antlr newbie too, but I've just completed a successful
project so may be able to help.

Would this work for you?:
packageDecl        : Identifier (DOT Identifer)*;
qualifiedJavaType    : (packageDecl DOT)? javaType;

Regards,
Dave



On 9 April 2012 21:28, Scott <jackett_dad at yahoo.com> wrote:

> All,
>
> I'm just starting with Antlr.  I have past experience with JavaCC, but
> it's been a while.
>
> I'm parsing a fully qualified java type name, and would like to
> differentiate the classpath from the class name.  So if I were parsing this:
>
> com.company.JavaType
>
> I would like to specify an expression for which the package and class name
> are distinct nodes in the parse tree.  I copied a Java 5 grammar as a
> starting point, but that distinction is not made.  I could easily do this
> separation in a visitor, but since Antlr is so cool, I'd rather that it did
> the work for me.
>
> The catch is, I don't want to have the last dot character be part of the
> package name, and I don't want the dot to be part of the class name
> either.
>
> So here is what I have so far:
>
> genericTypeArgument : type | QUESTION_MARK (('extends' | 'super') type)?;
>
> type            : qualifiedJavaType arrayModifier* | primitiveType
> arrayModifier*;
>
> packageDecl        : (Identifier DOT)*;
>
> qualifiedJavaType    : packageDecl? javaType;
>
> javaType        : Identifier genericTypeArguments?;
>
> This works almost.  The package declaration includes the last dot.  Is
> there a way that I can have the parser ignore(or not include) only the last
> dot in the package declaration?
>
> Thanks,
>
> Scott
>
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