[Issue 15791] New: Cannot get a stored nested struct object from Variant

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15791

          Issue ID: 15791
           Summary: Cannot get a stored nested struct object from Variant
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: k.hara.pg at gmail.com

Following test case fails to compile.

void main()
{
    import std.variant;

    int n = 3;
    struct NS1 { int foo() { return n + 10; } }
    struct NS2 { int foo() { return n * 10; } }

    Variant v;
    v = NS1();
    assert(v.get!NS1.foo() == 13);   // Line 11
    v = NS2();
    assert(v.get!NS2.foo() == 30);   // Line 13
}

$ dmd -o- test
DMD v2.070 DEBUG
phobos\std\variant.d(755): Error: cannot access frame pointer of test.main.NS1
test.d(11): Error: template instance
std.variant.VariantN!20u.VariantN.get!(NS1) error instantiating
phobos\std\variant.d(755): Error: cannot access frame pointer of test.main.NS2
test.d(13): Error: template instance
std.variant.VariantN!20u.VariantN.get!(NS2) error instantiating

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