Re: [Wxlua-users] wxLua: Function names not checked during pre-compilation?

[John L. <jla...@gm...>]

On 8/28/06, hel...@gm... <hel...@gm...> wrote:
> is it by design, that during pre-compilation the existence of funtions (or the correctness of function names) is not checked?
>
> Any mistyped function name is just discovered at runtime and leads to a "error running chunk" message.
>
> I would rather expect that the function names are checked sooner, so that any mistyped function (not declared or defined with RegisterFunction) is reported during pre-compilation.

I do not think that this is possible or would be overly complicated.
In fact lua itself doesn't do this itself. However if you know how
please suggest a way to do this. There was a lua lint program
somewhere that may be useful.

Try this simple program:

a = math.sin(1)
b = math.si(2)

$ ./lua5.1.exe precomp_test.lua
d:\wxCVS\wxLua\wxLua\bin\lua5.1.exe: precomp_test.lua:2: attempt to
call field 'si' (a nil value)
stack traceback:
        precomp_test.lua:2: in main chunk
        [C]: ?

It doesn't check that I've mistyped "math.sin" for line 2 until it's run.
However try this:

a = math.sin(1)
b = 1math.si(2)

$ ./lua5.1.exe precomp_test.lua
d:\wxCVS\wxLua\wxLua\bin\lua5.1.exe: precomp_test.lua:2: malformed
number near '1math'

It does check for gross syntax errors.

Regards,
    John Labenski