On 05/21/2012 11:07 AM, renoX wrote:
On Sunday, 20 May 2012 at 00:26:14 UTC, Mehrdad wrote:
http://www.reddit.com/r/programming/comments/tui75/lazy_evaluation_of_function_arguments_in_d/c4pwvyp
+1 ^
+1 too:
'f(x++)' what's the value of x after executing this function call?
If f is a function with a normal argument, the new value is x + 1, if f
is a function with a lazy argument, the new value can be anything
(depends on how many time the expression is evaluated).
int x;
void f(int){x=anything;}
void main(){ f(x++); }
So the lazy keyword hurts maintainability:
you need an IDE which color differently the callsite to be usable, really ugly..
Have you actually encountered this problem in practice?
How about improving 'f({ return x ++ })' to either f({^x++})' (^ is
return in Smalltalk) or 'f({x++})'?
f(()=>x++) is already short enough.
