1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
// revisions: rpass1 rpass2
pub fn foo() {
bar();
baz::<()>();
}
fn bar()
where
<() as Table>::AllColumns:,
{
}
fn baz<W>()
where
W: AsQuery,
<W as AsQuery>::Query:,
{
}
trait AsQuery {
type Query;
}
trait UnimplementedTrait {}
impl<T> AsQuery for T
where
T: UnimplementedTrait,
{
type Query = ();
}
struct Wrapper<Expr>(Expr);
impl<Ret> AsQuery for Wrapper<Ret> {
type Query = ();
}
impl AsQuery for ()
where
Wrapper<<() as Table>::AllColumns>: AsQuery,
{
type Query = ();
}
trait Table {
type AllColumns;
}
#[cfg(rpass1)]
impl Table for () {
type AllColumns = Checksum1;
}
#[cfg(rpass1)]
struct Checksum1;
#[cfg(rpass2)]
impl Table for () {
type AllColumns = Checksum2;
}
#[cfg(rpass2)]
struct Checksum2;
fn main() {}
|
