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digitalmars.D.learn - Question about anonymous delegates.

reply "Sharp" <sharp1113 hotmail.com> writes:
I found something what I don't understand.

Here is a simplifed code with comments:
http://dpaste.dzfl.pl/a914d11a

I creating anonymous delegates, whose function is to modify their 
parameter. Their parameters are different class references.
I pass these class references to anonymous delegates, but the 
delegates obtain only the last passed class reference.

Thanks for your answers.
Oct 03 2012
parent Timon Gehr <timon.gehr gmx.ch> writes:
On 10/03/2012 03:53 PM, Sharp wrote:
 I found something what I don't understand.

 Here is a simplifed code with comments:
 http://dpaste.dzfl.pl/a914d11a

 I creating anonymous delegates, whose function is to modify their
 parameter. Their parameters are different class references.
 I pass these class references to anonymous delegates, but the delegates
 obtain only the last passed class reference.

 Thanks for your answers.

class Num { int a; } void main(){ auto nums = new Num[10]; alias void delegate() Func; auto funcs = new Func[10]; // workaround for http://d.puremagic.com/issues/show_bug.cgi?id=2043 ahead: for(int i = 0; i < 10; ++i) (){ Num num = nums[i] = new Num(); int i=i; // fix for bug in your code funcs[i] = {num.a = i;}; }(); foreach(num; nums) { assert(num.a == 0); } foreach(func; funcs) { func(); } foreach(i, num; nums) { assert(num.a == i); } }
Oct 03 2012