foreach ... else statement

[Andrei Alexandrescu]

Walter Bright wrote:
> Andrei Alexandrescu wrote:
>> Walter Bright wrote:
>>> Academic papers on compiler optimizations always start out with 
>>> "assume there are no pointers, no references, no arrays, no 
>>> exceptions, no threads, no aliasing, no overflows, no 
>>> signed/unsigned, there are infinite registers available, registers 
>>> are orthogonal, etc." Or they just go ahead and let you discover that 
>>> they assumed that.
>>
>> Well that should be taken with the traditional grain of salt.
> 
> Some are better than others, sure. I found out the hard way. But even in 
> the paper cited in this thread:
> 
> "We do not deal here with alias problems caused by assignments to array 
> elements, to parameters passed by reference, and to variables that are 
> referenced via pointers. These problems can be dealt with in the same 
> way as described in [5]."
> 
> and this:
> 
> "This is useful for languages such as Simula[3], Modula-2 [13] or Oberon 
> [14] that lack goto statements at all."
> 
> Who uses Simula, Modula-2 or Oberon?

Without saying anything about this paper in particular, quality of 
research papers has a very top-heavy distribution. Outside a few 
conference proceedings and journals, where only a few institutions 
publish, the quality of research publications decreases drastically.

Andrei