I want to get a reference to a parent function from inside a
nested function. I need it for `getUDAs!(parentFunction,
attribute)`.
`__traits(parent, mixin(__FUNCTION__))` works inside the parent
function and gives me the module, but `mixin(__FUNCTION__)` alone
inside the nested function immediately errors.
```d
module foo;
void bar(string s, int i)
{
assert(__FUNCTION__ == "foo.bar");
alias parentModule = __traits(parent, mixin(__FUNCTION__));
assert(is(parentModule == module));
void dg()
{
assert(__FUNCTION__ == "foo.bar.dg");
alias parentFunction = __traits(parent,
mixin(__FUNCTION__));
}
}
void main() {}
```
```
onlineapp.d(12): Error: function `bar` is not callable using
argument types `()`
onlineapp.d(12): too few arguments, expected 2, got 0
onlineapp.d(3): `foo.bar(string s, int i)` declared here
```
So `mixin(__FUNCTION__)` seems to be trying to call the parent
function rather than giving me the symbol of the nested one, like
`foo.bar().dg`. I tried making it `mixin("&" ~ __FUNCTION__)` but
it did not help.
How can I make this work?
