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rust/src/test/ui/resolve/issue-65035-static-with-parent-generics.stderr

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resolve: prohibit foreign statics w/ generics This commit modifies resolve to disallow foreign statics that use parent generics. `improper_ctypes` is not written to support type parameters, as these are normally disallowed before the lint is run. Thus, type parameters in foreign statics must be prohibited before the lint. The only other case where this *could* have occured is in functions, but typeck prohibits this with a "foreign items may not have type parameters" error - a similar error did not exist for statics, because statics cannot have type parameters, but they can use any type parameters that are in scope (which isn't the case for functions). Signed-off-by: David Wood <david@davidtw.co>
2019-10-05 16:55:58 +01:00
error[E0401]: can't use generic parameters from outer function
--> $DIR/issue-65035-static-with-parent-generics.rs:6:26
|
LL | fn f<T>() {
| - type parameter from outer function
LL | extern "C" {
LL | static a: *const T;
| ^ use of generic parameter from outer function
error[E0401]: can't use generic parameters from outer function
--> $DIR/issue-65035-static-with-parent-generics.rs:12:22
|
LL | fn g<T: Default>() {
| - type parameter from outer function
LL | static a: *const T = Default::default();
| ^ use of generic parameter from outer function
error[E0401]: can't use generic parameters from outer function
--> $DIR/issue-65035-static-with-parent-generics.rs:18:24
|
LL | fn h<const N: usize>() {
| - const parameter from outer function
LL | extern "C" {
LL | static a: [u8; N];
| ^ use of generic parameter from outer function
error[E0401]: can't use generic parameters from outer function
--> $DIR/issue-65035-static-with-parent-generics.rs:24:20
|
LL | fn i<const N: usize>() {
| - const parameter from outer function
LL | static a: [u8; N] = [0; N];
| ^ use of generic parameter from outer function
error[E0401]: can't use generic parameters from outer function
--> $DIR/issue-65035-static-with-parent-generics.rs:24:29
|
LL | fn i<const N: usize>() {
| - const parameter from outer function
LL | static a: [u8; N] = [0; N];
| ^ use of generic parameter from outer function
warning: the feature `const_generics` is incomplete and may cause the compiler to crash
--> $DIR/issue-65035-static-with-parent-generics.rs:1:12
|
LL | #![feature(const_generics)]
| ^^^^^^^^^^^^^^
|
= note: `#[warn(incomplete_features)]` on by default
Evaluate repeat expression lengths as late as possible
2020-03-14 15:30:35 +01:00
error[E0308]: mismatched types
--> $DIR/issue-65035-static-with-parent-generics.rs:24:25
|
LL | static a: [u8; N] = [0; N];
| ^^^^^^ expected `N`, found `N`
|
= note: expected array `[u8; _]`
found array `[u8; _]`
rustc: Add a warning count upon completion
2020-03-11 16:30:09 +01:00
error: aborting due to 6 previous errors; 1 warning emitted
resolve: prohibit foreign statics w/ generics This commit modifies resolve to disallow foreign statics that use parent generics. `improper_ctypes` is not written to support type parameters, as these are normally disallowed before the lint is run. Thus, type parameters in foreign statics must be prohibited before the lint. The only other case where this *could* have occured is in functions, but typeck prohibits this with a "foreign items may not have type parameters" error - a similar error did not exist for statics, because statics cannot have type parameters, but they can use any type parameters that are in scope (which isn't the case for functions). Signed-off-by: David Wood <david@davidtw.co>
2019-10-05 16:55:58 +01:00
Evaluate repeat expression lengths as late as possible
2020-03-14 15:30:35 +01:00
Some errors have detailed explanations: E0308, E0401.
For more information about an error, try `rustc --explain E0308`.
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