Why this UDP will not compile?

[d coder via Digitalmars-d]

DMD wont compile this. I get an error saying:
/tmp/test.d(3): Error: need 'this' for 'foo' of type 'int'
Failed: ["dmd", "-v", "-o-", "/tmp/test.d", "-I/tmp"]

Is this a bug or is it illegal code?

// Regards
// Cherry

class Foo {
int foo = 42;
@foo int bar;
this(int frop) {
foo = frop;
}
int getFooAttr() {
auto ffff = __traits(getAttributes, this.tupleof[1]);
return ffff[0];
}
}

void main() {
Foo f = new Foo(43);
f.getFooAttr();
}
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[Marco Leise via Digitalmars-d]

Am Sat, 27 Sep 2014 19:19:28 +0530
schrieb d coder via Digitalmars-d

Post by d coder via Digitalmars-d
/tmp/test.d(3): Error: need 'this' for 'foo' of type 'int'
Failed: ["dmd", "-v", "-o-", "/tmp/test.d", "-I/tmp"]
Is this a bug or is it illegal code?
// Regards
// Cherry
class Foo {
int foo = 42;
@foo int bar;
this(int frop) {
foo = frop;
}
int getFooAttr() {
auto ffff = __traits(getAttributes, this.tupleof[1]);
return ffff[0];
}
}
void main() {
Foo f = new Foo(43);
f.getFooAttr();
}

That's incorrect code. UDAs are attached to the item (the ctor
in this case) at compile time and foo is neither compile time
nor static, it is a class instance field. You would need to
use @"foo" and in getFooAttr() go through the getMember trait.