RE: Implementing Goto
-------Phoenix-Boundary-07081998-
Hi David Cuny, you wrote on 2/12/02 12:46:24 AM:
>Here's an attempt to implement a GOTO statement in Euphoria. It doesn't
>work
>(yet), but it's a start. Hopefully people can help me out here. I haven't
>seen the latest release of the Euphoria source, so perhaps there are some
>answers in there, too.
>
>The grammar is:
>
> LABEL <label>
> GOTO <label>
>
> ...
As you may know, my grammer is:
:label:
goto label
I think the surrounding ':'s make the label more
visible and just look more like a label.
Should you wish to try this syntax (hope) it is no more
difficult. It just involves having the scanner recognize
the ':' character as a token, instead of recognizing
the keyword 'label' (faster too!). The label statement
code insists on seeing the trailing colon. If you
don't like my syntax, thats ok, but please don't
reject it because of implementation.
What you're doing seems bascally very similar to my code.
One significant difference, perhaps, is that I explicitly
prevent the use of goto at the file level. I didn't want
to think about what happens when the code jumps around
the definition of a subprogram.
There may be some differences between code in subprograms,
which is compiled for later execution, and code at file
level, which is executed as it is parsed?
-------Phoenix-Boundary-07081998---
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