Re: Using Lua's string interning for faster compares?

[Peter Odding <peter@...>]

> > When I write modules to wrap C++ objects, they usually have a __index
> > method that does a lot of string comparing, like:
> > if(!strcmp(key, "foo")) lua_pushcfunction(L, obj_method_foo);
> > else if(!strcmp(key, "bar")) lua_pushcfunction(L, obj_method_bar);
> > etc... I'm not sure if compilers can optimize this, but doing all
> > those strcmp()s every time a method/field is looked up seems terribly
> > inefficient.
>
> Try Ragel[1].
>
> [1]: http://www.complang.org/ragel/
>
> I've attached the template I use for such occasions.

Alternatively, re2c does the same thing: http://re2c.org/ (for simple 
use cases like matching a string against one of several predefined 
constants).

 - Peter