• Jesse Phillips (11/11) Jan 26 2010 For the following code I get the bellow error. I'm wondering if I should...
• BCS (13/30) Jan 26 2010 I don't know if this is a bug or what but I think this happens because t...
• Jesse Phillips (3/31) Jan 26 2010 At least that explains why, should have mentioned I had the work around.

Jesse Phillips <jessekphillips+D gmail.com> writes:

For the following code I get the bellow error. I'm wondering if I should be
reporting a bug, or if creating default delegates is correctly prevented?

.\defltdg.d(10): Error: delegate defltdg.__dgliteral3 is a nested function and
cannot be accessed from main

import std.stdio;

void main() {
   take(() {writeln("Hello world");});
   take(() {});
   take();
}


void take(void delegate() dg = () {}) {
   dg();
}

BCS <none anon.com> writes:

Hello Jesse,

 For the following code I get the bellow error. I'm wondering if I
 should be reporting a bug, or if creating default delegates is
 correctly prevented?
 
 .\defltdg.d(10): Error: delegate defltdg.__dgliteral3 is a nested
 function and cannot be accessed from main
 
 import std.stdio;
 
 void main() {
 take(() {writeln("Hello world");});
 take(() {});
 take();
 }
 void take(void delegate() dg = () {}) {
 dg();
 }

I don't know if this is a bug or what but I think this happens because the 
default is defined (compile time) in the scope of take but generated (run 
time) in the scope of main. 

I'd be fine with a special case for this that either 1) allows a delegate 
that doesn't access any outer scope to be generated like that or 2) special 
case the code gen to correctly generate the delegate for the function (the 
new frame pointer can be computed at that point)

work around:

void take() { take(() {});}
void take(void delegate() dg) { dg(); }



--

<IXOYE><

Jesse Phillips <jessekphillips+D gmail.com> writes:

BCS wrote:

 Hello Jesse,

 For the following code I get the bellow error. I'm wondering if I
 should be reporting a bug, or if creating default delegates is
 correctly prevented?
 
 .\defltdg.d(10): Error: delegate defltdg.__dgliteral3 is a nested
 function and cannot be accessed from main
 
 import std.stdio;
 
 void main() {
 take(() {writeln("Hello world");});
 take(() {});
 take();
 }
 void take(void delegate() dg = () {}) {
 dg();
 }

 I don't know if this is a bug or what but I think this happens because the 
 default is defined (compile time) in the scope of take but generated (run 
 time) in the scope of main. 

 I'd be fine with a special case for this that either 1) allows a delegate 
 that doesn't access any outer scope to be generated like that or 2) special 
 case the code gen to correctly generate the delegate for the function (the 
 new frame pointer can be computed at that point)

 work around:

 void take() { take(() {});}
 void take(void delegate() dg) { dg(); }


At least that explains why, should have mentioned I had the work around.

Thanks.