https://d.puremagic.com/issues/show_bug.cgi?id=12363

           Summary: getProtection trait doesn't work for certain kinds of
                    fields (and is poorly designed...)
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: jakobovrum@gmail.com


--- Comment #0 from Jakob Ovrum <jakobovrum@gmail.com> 2014-03-14 04:39:30 PDT ---
Example:

---
alias TemplateArgumentList(T...) = T;

struct S
{
    alias T = TemplateArgumentList!(int, float);
}

pragma(msg, __traits(getProtection, __traits(getMember, S, "T")));
---

Output:

---
test.d(8): Error: argument int has no protection
false
---

getProtection's interface is simply poorly designed. As exemplified by the plethora of reports relating to it, it's tricky to use correctly, and as shown above, it fails to support all kinds of symbols. The latter means this is a bug, not an enhancement.

The interface should probably be:

__traits(getProtection, <aggregate>, <symbolName>)

Which should also succeed for inaccessible symbols. That way, both of getProtection's problems are solved.

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