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 | Posted by Bolpat |  Permalink Reply |
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Bolpat 
| https://issues.dlang.org/show_bug.cgi?id=23907
--- Comment #2 from Bolpat <qs.il.paperinik@gmail.com> ---
> I would argue that this is intended behavior and if the opposite occurs for other traits then that is the bug.
I strongly disagree.
If you were right, that would mean that you cannot e.g. create a serialization library that can serialize private data members.
A module could reasonably pass a private symbol as an argument to an `alias` parameter of a template imported from another module. That template should be able to do its job, regardless whether the symbol is private.
> Which ones?
* `getProtection` for a trivial one.
* `getOverloads` allows accessing private overloads in a private aggregate
* `hasMember` and `allMembers` returns/lists private members
* `hasCopyConstructor` does not fail if the argument is an alias to a private
struct
I didn’t check all of them, just a sample.
> I tried `getMember` and that doesn't bypass private.
I have no idea what you tried, but in my tests, it does.
Here is what I tried (suitable for run.dlang.io):
```d
--- a.d
#line 3 "a.d"
private struct _S
{
private int x;
private void f() @safe {}
private static int f(int x) @safe pure => x;
}
// only way to access anything in this module:
alias S = _S;
--- playground.d
#line 16 "playground.d"
import a;
void main()
{
S s;
static foreach (ov; __traits(getOverloads, s, "f"))
{
static if (is(typeof(ov(0))))
{
ov(0);
}
}
static assert(__traits(hasMember, S, "f"));
static assert(__traits(hasMember, s, "f"));
static assert(!__traits(compiles, s.x = 2 )); // x is private
__traits(getMember, s, "x") = 2;
static assert(!__traits(compiles, assert(s.x == 2) )); // x is private
assert(__traits(getMember, s, "x") == 2);
static assert(__traits(getProtection, S) == "private");
static assert(__traits(getProtection, __traits(getMember, s, "x")) ==
"private");
}
```
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