[antlr-interest] Building an interpreter

[Richard Clark]

On Thu, Apr 24, 2008 at 3:01 PM,  <dcmailbag-antlr at yahoo.com> wrote:

>  The problem with the interpreter examples seen is that they require the
>  input stream to the interpreter being constructed be the same stream as the
>  input to the parser building the interpreter (the token and node streams are
>  derived from the input stream).

I'd tackle this by writing an input adaptor that lets you switch its
input stream or works from multiple input streams in a row. You could
easily pick up the source for ANTLRInputStream and alter it.

The only tricky part is knowing when to signal EOF to the parser. If
you had a "definition" stream and a "execution" stream, EOF on the
first could tell the input adaptor to switch to the second and EOF on
the second would be passed through to the parser.

I hope this gives you enough to go on.

 ...Richard