floating point - nan initializers

[Ivan Senji]

Anders F Björklund wrote:
> Ivan Senji wrote:
> 
>> In that case 0 is as bad as anything else. Atleast with nan, a 
>> developer may decide to print sum to console and find out that it is 
>> nan. But what if the formula is
>> sum = sum*dx + dy; -> this will cause subtle errors if you expected 
>> sum to be 1 for example. But you will get some numbers as a result but 
>> they are wrong even though you think they are allright, and the next 
>> thing you know your D-driven spaceship is falling onto Mars too fast 
>> and you are loosing alot of money an thinking: if only that sum was 
>> initialized to nan! :)
> 
> 
> Then again, it's usually better to catch those bugs at compile time ?
> 

Compile time would be best. C# compiler does the same thing, and 
although it can be a little irritating it is uesfull. Maybe this could 
be warning? But it isn't that easy to detect.