Re: Implementing GOTO/GOSUB
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- Subject: Re: Implementing GOTO/GOSUB
- From: Rici Lake <lua@...>
- Date: 2004年9月13日 14:05:15 -0500
On 13-Sep-04, at 1:36 PM, Asko Kauppi wrote:
Okay, here's a more polished version (still, not tried). If someone
uses it, make sure cpp doesn't add #pragma's or other such stuff in
its output (I've used 'cpp -P -xassembler-with-cpp').
local __retline
#define __GOSUB(xx) __retline='#'.. #__LINE__; __GOTO=xx;
__LABEL='#'.. #__LINE__
#define __RETURN __GOTO=__retline
I know that the '__GOSUB()' syntax and '__GOTO=' syntaxes are nastily
different; don't know a fix for this.. :(
-ak
As long as we're retrofitting Lua here, what about
<http://www.fortran.com/fortran/come_from.html> ?
The expressiveness of the last example is very hard to match.
Rici
:)