[ros-dev] Replacing unsafe TRUE comparisons (Following Re: bool => BOOL)

[Love Nystrom]

On 2014-11-22 18.47, Timo Kreuzer wrote:
> Am 22.11.2014 11:39, schrieb Love Nystrom:
>>
>> On 2014-11-21 04.00, Timo Kreuzer wrote:
>>> Am 20.11.2014 14:18, schrieb Love Nystrom:
>>>>
>>>> Well... Actually not exactly the same.. ;)
>>>> "if (f != FALSE)" requires an explicit comparison with a second 
>>>> operand,
>>> No, it does not. It requries the compiler to generate code that 
>>> executes the following statement, when f is not 0. 
>>
>> I suspect we look at it from two different viewpoints here..
>> Yours is "C centric" and mine is "object code centric".
>> You talk about what the compiler is required to do,
>> and I talk about what comes out at the end of compilation.
> You claimed '"if (f != FALSE)" requires an explicit comparison with a 
> second operand,' 

The "if (f != FALSE)" instruction has *two operands*, variable f and the 
immediate 0.
The "if ( f )" instruction has *one operand*, variable f.
However, according to you two plus one is four.

I'm outta here..
Perhaps I'll swing by in a few years and see if you've matured a bit, Mr 
Grand Master.

Tada

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