Re: LUA_USE_APICHECK

[liam mail <liam.list@...>]

On 26 August 2011 09:50, Josh Simmons <simmons.44@gmail.com> wrote:
> On Fri, Aug 26, 2011 at 5:58 PM, liam mail <liam.list@googlemail.com> wrote:
>> I am just looking for some clarification when using the macro
>> LUA_USE_APICHECK, is it the case that indicators in the manual are not
>> respected for functions when using this macro? I ask because I decided
>> to turn the option on and run unit tests on OOLua to find that an
>> assert is being triggered for the function lua_touserdata (indirectly
>> via index2addr) with it, yet the manual states "'-' means the function
>> never throws any error". The situation under test was trying to pull a
>> user data of an empty stack which as I understood it would return NULL
>> and does without the macro, this situation is handled gracefully in
>> the test but means I can not use the macro as is. Firstly because an
>> assert (from assert.h) in unit tests is bad and also it would require
>> different tests for release and debug builds.
>>
>> Thanks
>> Liam
>>
>>
>
> I suggest checking the stack height before trying to remove things from it.
>

There is no need to check the stack depth as it will return NULL as it
should when the macro is not used.

> Errors in this instance refer to Lua errors, not any kind of C
> assertions or error handling.

Yet it does say any error, which is why I ask the question.

Liam