Added POSTPONE error handling. Drive-by code simplifications.

[jkotlinski]

No description provided.

[jkotlinski]

At this point, I don't really understand what the ' literal compile, ' compile, literal twister does anymore. But it seems to work fine.

[lonetech]

It's still the same two logical parts. The first three words were already there, and the last three replace ['] compile,; the brackets perform things at compile time of postpone, it still looks up compile,, and literal transfers the result from the compile time stack to the run time stack. The ' and literal do the same job as inside the compiled [']. I do agree it's a little boggling to see the long string of 3 words 7 times in rapid succession. It's because we don't yet have postpone and [']; the block would read if postpone literal ['] compile, then with them.

[jkotlinski]

I think I get it now. Thank you!

[lonetech]

Looks like a move of rot from base.fs to core.asm was mixed in. That code change also looks okay, though it wasn't mentioned. I suppose it will build faster, but there's no asm calling it, no label to do so, and base.fs still depends on asm words. The only difference at run time will be the order of words.

[jkotlinski]

The move of rot was so it could be used in postpone!

[lonetech]

Thank you for the rot clarification, and pardon my confusion. I didn't spot that dependency. And asm in turn depends on does> etc so I guess this was the smaller move. Not a problem it is done, I just didn't see why at the time.