Purity (D2 standard libraries / object.d)

[Jason House]

Walter Bright Wrote:

> Michel Fortin wrote:
> > Hum, could the compiler be trusted to add the memoization code to pure 
> > functions so they can stay pure?
> 
> If the compiler does general memoization on pure functions, all it has 
> to do is use the bits of the arguments passed on the stack to the 
> function as an index into an associative array of the return values.
>  
> The problem is identifying if this would be faster than recomputing the 
> return value.

What about a compiler hint similar to inline or register?