[Issue 15757] New: D main is a nested function and cannot be accessed

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15757

          Issue ID: 15757
           Summary: D main is a nested function and cannot be accessed
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: Jesse.K.Phillips+D at gmail.com

I feel as though the code below should compile. If I move the inner struct "M"
out of the scope of test() it compiles just fine.

---------------
import std.algorithm;

void main() @safe
{
    [1,2,3].map!(x => x*x).test;
}

void test(R)(R r) {
    struct M(R) {
        @disable this();
        this(R r) {
            payload = r;
        }
        R payload;
    }

    M!R m = M!R(r);
}
---------------
$ dmd test.d
test.d(17): Error: function D main is a nested function and cannot be accessed
from test.test!(MapResult!(__lambda1, int[])).test
---------------

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