RE: Static metaprogramming with Lua 5.2.

[Dominique Torette <Dominique.Torette@...>]

I would like, during lexical analysis, to evaluate a Lua expression and then substitute it with the result before continuing the compilation.
As a very basic example, I would like that the following code
	print('''os.date("%x")''') 
print the 'compilation date', instead of the 'runtime date'.

-----Original Message-----
From: lua-l-bounces@lists.lua.org [mailto:lua-l-bounces@lists.lua.org] On Behalf Of steve donovan
Sent: vendredi 11 avril 2014 13:42
To: Lua mailing list
Subject: Re: Static metaprogramming with Lua 5.2.

On Fri, Apr 11, 2014 at 12:00 PM, Fabien <fleutot+lua@gmail.com> wrote:
> Notice that depending on how complex your metaprogramming needs are, 
> you might be better-off with a dumb text-based preprocessor.

It would be useful (and interesting) if you could give us examples of the transformations you need to apply to source.

If they're simple, then a lexical macro preprocessor like LuaMacro could do the job (macros may execute arbitrary Lua code and can temporarily take over stream processing - "reader macros").

Deep syntactical macros remain MetaLua's claim to fame....


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