[Issue 4312] std.traits.ReturnType no longer accepts function literals

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4312


kennytm at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |kennytm at gmail.com


--- Comment #4 from kennytm at gmail.com 2011-05-26 23:41:38 PDT ---
(In reply to comment #3)
> I can confirm that non-nested function literals now compile. (i.e. the original
> bug report) But nested function literals don't compile (DMD 2.053):
> 
> void main(string[] args) {
>     int b;
>     writeln(  (ReturnType!( function(int a){return a+b;} )).stringof );
> }
> 
> Error: function hello.main.__funcliteral1 cannot access frame of function D
> main
> 
> Not too sure if this is a separate issue or not.

This is expected. A function literal cannot form a closure. You need a
delegate.

--------------------------
void main() {
    int b;
    auto c = function(int a){return a+b;};
}
--------------------------
x.d(6): Error: function x.main.__funcliteral1 cannot access frame of function D
main
--------------------------

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