Re: Lua 4.0 (alpha) available, read patterns

[Jon Kleiser <jon.kleiser@...>]

At 18:57 -0300 on 24-04-00, Luiz Henrique de Figueiredo wrote:

> Lua 4.0 (alpha) is now available for downloading at
>         http://www.tecgraf.puc-rio.br/lua/ftp/lua-4.0-alpha.tar.gz
>         ftp://ftp.tecgraf.puc-rio.br/lua/lua-4.0-alpha.tar.gz
>         http://csg.uwaterloo.ca/lua/ftp/lua-4.0-alpha.tar.gz
>         ftp://csg.uwaterloo.ca/pub/lhf/lua/lua.tar.gz
>
> The other mirrors will be updated soon, hopefully.
>
> The distribution includes an updated reference manual in HTML.
> The PostScript and PDF versions in the site are still for version 3.2.
>
> * New in version 4.0 (alpha)
>   --------------------------
>   + the API is now fully re-entrant.
>   + new "break" and "for" statements.
>   + cleaner virtual machine -- at least 20% faster.
>   + reduced memory usage.
>   + code now compiles unmodified as both ANSI C and C++.
>   + improved debug API.
>   and more!
>
> To use the new API, you need to do
> 	#define LUA_REENTRANT
> before
> 	#include "lua.h"
>
> The old API is enabled by default as macros in lua.h.
> Existing C code that use Lua should compile without change.
> Please report any problems to lua@tecgraf.puc-rio.br.
>
> Thanks.
> --lhf

I have now built a PowerMac Lua 4.0 (alpha) application, and that was 
really easy. The only warning that CodeWarrior Pro 5 gave me, was 
about some possibly superfluous ";" at the end of a simple while 
line, which I ignored.

As I tried to run one of my bigger scripts, I got the "error: read 
patterns are deprecated" message. My script used read(fileRef, 
"....") to read four bytes. I've found
   #define read_pattern(L, f, p) (lua_error(L, ...
in the file liolib.c, but can somebody please tell me what to do with 
this line to enable the old read patterns ...?

Would it be possible to put a "read pattern switch" at the run-time 
level? (It's rather clumsy to have to build two kinds of 
applications.)

/Jon

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Jon Kleiser / ADB-seksjonen / USIT / University of Oslo / Norway
Mail: Jon.Kleiser@usit.uio.no / Tel: +47-22 85 28 04 / Fax: +47-22 85 29 70
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