[Issue 10497] New: Opaque structs cannot be dereferenced in pointer to pointer types

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10497

           Summary: Opaque structs cannot be dereferenced in pointer to
                    pointer types
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2013-06-28 11:06:51 PDT ---
-----
module test;

// opaque type
struct S;

void main()
{
    S** s;
    void* ptr;
    *s = cast(S*)ptr;  // pointer assignment, not value assignment
}
-----

$ dmd test.d
> test.d(4): Error: struct test.S unknown size
> test.d(4): Error: struct test.S no size yet for forward reference
> test.d(4): Error: struct test.S unknown size
> test.d(4): Error: struct test.S no size yet for forward reference

The size of the structure does not need to be known since what is being
assigned is a memory address. It is not a value assign of the struct.

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