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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
error[E0741]: `Foo` must implement `ConstParamTy` to be used as the type of a const generic parameter
--> $DIR/unify-op-with-fn-call.rs:18:29
|
LL | struct Evaluatable<const N: Foo>;
| ^^^
|
help: add `#[derive(ConstParamTy)]` to the struct
|
LL + #[derive(ConstParamTy)]
LL | struct Foo(u8);
|
error[E0741]: `Foo` must implement `ConstParamTy` to be used as the type of a const generic parameter
--> $DIR/unify-op-with-fn-call.rs:20:17
|
LL | fn foo<const N: Foo>(a: Evaluatable<{ N + N }>) {
| ^^^
|
help: add `#[derive(ConstParamTy)]` to the struct
|
LL + #[derive(ConstParamTy)]
LL | struct Foo(u8);
|
error[E0741]: `Foo` must implement `ConstParamTy` to be used as the type of a const generic parameter
--> $DIR/unify-op-with-fn-call.rs:24:17
|
LL | fn bar<const N: Foo>() {}
| ^^^
|
help: add `#[derive(ConstParamTy)]` to the struct
|
LL + #[derive(ConstParamTy)]
LL | struct Foo(u8);
|
error: unconstrained generic constant
--> $DIR/unify-op-with-fn-call.rs:30:12
|
LL | bar2::<{ std::ops::Add::add(N, N) }>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: try adding a `where` bound using this expression: `where [(); { std::ops::Add::add(N, N) }]:`
error[E0015]: cannot call non-const operator in constants
--> $DIR/unify-op-with-fn-call.rs:20:39
|
LL | fn foo<const N: Foo>(a: Evaluatable<{ N + N }>) {
| ^^^^^
|
note: impl defined here, but it is not `const`
--> $DIR/unify-op-with-fn-call.rs:10:1
|
LL | impl const std::ops::Add for Foo {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
= help: add `#![feature(effects)]` to the crate attributes to enable
error[E0015]: cannot call non-const fn `<Foo as Add>::add` in constants
--> $DIR/unify-op-with-fn-call.rs:21:13
|
LL | bar::<{ std::ops::Add::add(N, N) }>();
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
= help: add `#![feature(effects)]` to the crate attributes to enable
error[E0015]: cannot call non-const fn `<usize as Add>::add` in constants
--> $DIR/unify-op-with-fn-call.rs:30:14
|
LL | bar2::<{ std::ops::Add::add(N, N) }>();
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
= help: add `#![feature(effects)]` to the crate attributes to enable
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0015, E0741.
For more information about an error, try `rustc --explain E0015`.
|
