[antlr-interest] Reuse of tokens and rules

[Thomas Brandon]

Check out the island-grammar example in the v3 examples pack. Should give
you the basis for everything you need.

Tom.

On 7/1/06, Emond Papegaaij <e.papegaaij at student.utwente.nl> wrote:
>
> Hello,
>
> I'm working on a project that needs to be able to parse embedded code in a
> selected language. This is similar to actions in ANTLR. The problem with
> this
> is that to do it right the lexer has to take things such as comments,
> strings
> and character literals into account. For example when matching code
> between
> two curly brackets, brackets in a comment or string should be ignored.
> This
> means the lexer should know when a string or comment starts and ends.
> However
> not all languages use the same syntax for strings and comments. For
> example
> Pascal uses '(* ... *)', '{ ... }' and '// ...' for comments, whereas Java
> uses '/* ... */' and '// ...'. With strings it's '...' vs. "...".
>
> In this language I also need to be able to parse constructs such as type
> names
> and identifiers. These constructs are also specified in the selected
> language. A type name in Java will be different than a type name in
> Pascal.
> This means I also need different parser rules for various languages.
>
> Is it possible to write small specifications for these constructs and
> import
> the one needed? These rules are only a small portion of all the rules. I
> don't like the solution of having to maintain the same parser and lexer
> for
> multiple target languages.
>
> PS. I'm using ANTLR v3.
>
> Best regards,
> Emond Papegaaij
>
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