On Sunday 30 August 2015 12:21, rsw0x wrote:
> import std.algorithm, std.range;
>
> auto foo(R)(R a, immutable int b)
> {
> return a.map!(x => x + b);
> }
>
> @nogc @safe unittest
> {
> int[3] test = [1,2,3];
>
> assert(test[].foo(3).equal(only(4,5,6)));
> }
>
> does this count?
I think this shouldn't compile and it only does so because of issue 14771.
https://issues.dlang.org/show_bug.cgi?id=14771
The delegate in foo uses a local variable and it's returned from the
function, so it needs a closure. Where does the closure go if not on the GC
heap?
See also this Learn thread about how to call map with a delegate in a @nogc
function:
http://forum.dlang.org/post/[email protected]
Ali Çehreli's solution there may or may not actually be @nogc, but I'm
afraid it relies on issue 14771 any way:
http://forum.dlang.org/post/[email protected]
