Rollup merge of #75938 - Amjad50:min_const_generics-tests-revisions, …

…r=lcnr

Added some `min_const_generics` revisions into `const_generics` tests

Help in #75279. still a lot more to cover though

r? @lcnr

src/test/ui/const-generics/argument_order.stderr → src/test/ui/const-generics/argument_order.full.stderr

@@ -1,11 +1,11 @@
 error: lifetime parameters must be declared prior to const parameters
-  --> $DIR/argument_order.rs:9:32
+  --> $DIR/argument_order.rs:12:32
    |
 LL | struct AlsoBad<const N: usize, 'a, T, 'b, const M: usize, U> {
    |               -----------------^^-----^^-------------------- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, const N: usize, T, const M: usize, U>`
 
 error[E0747]: lifetime provided when a type was expected
-  --> $DIR/argument_order.rs:16:23
+  --> $DIR/argument_order.rs:20:23
    |
 LL |     let _: AlsoBad<7, 'static, u32, 'static, 17, u16>;
    |                       ^^^^^^^

src/test/ui/const-generics/argument_order.min.stderr

@@ -0,0 +1,30 @@
+error: type parameters must be declared prior to const parameters
+  --> $DIR/argument_order.rs:6:28
+   |
+LL | struct Bad<const N: usize, T> {
+   |           -----------------^- help: reorder the parameters: lifetimes, then types, then consts: `<T, const N: usize>`
+
+error: lifetime parameters must be declared prior to const parameters
+  --> $DIR/argument_order.rs:12:32
+   |
+LL | struct AlsoBad<const N: usize, 'a, T, 'b, const M: usize, U> {
+   |               -----------------^^-----^^-------------------- help: reorder the parameters: lifetimes, then types, then consts: `<'a, 'b, T, U, const N: usize, const M: usize>`
+
+error: type parameters must be declared prior to const parameters
+  --> $DIR/argument_order.rs:12:36
+   |
+LL | struct AlsoBad<const N: usize, 'a, T, 'b, const M: usize, U> {
+   |               ---------------------^----------------------^- help: reorder the parameters: lifetimes, then types, then consts: `<'a, 'b, T, U, const N: usize, const M: usize>`
+
+error[E0747]: lifetime provided when a type was expected
+  --> $DIR/argument_order.rs:20:23
+   |
+LL |     let _: AlsoBad<7, 'static, u32, 'static, 17, u16>;
+   |                       ^^^^^^^
+   |
+   = note: lifetime arguments must be provided before type arguments
+   = help: reorder the arguments: lifetimes, then types, then consts: `<'a, 'b, T, U, N, M>`
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0747`.

src/test/ui/const-generics/argument_order.rs

@@ -1,13 +1,17 @@
-#![feature(const_generics)]
-#![allow(incomplete_features)]
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 struct Bad<const N: usize, T> {
+    //[min]~^ ERROR type parameters must be declared prior to const parameters
     arr: [u8; { N }],
     another: T,
 }
 
 struct AlsoBad<const N: usize, 'a, T, 'b, const M: usize, U> {
     //~^ ERROR lifetime parameters must be declared prior
+    //[min]~^^ ERROR type parameters must be declared prior to const parameters
     a: &'a T,
     b: &'b U,
 }

src/test/ui/const-generics/array-wrapper-struct-ctor.rs

@@ -1,7 +1,8 @@
 // run-pass
-
-#![feature(const_generics)]
-//~^ WARN the feature `const_generics` is incomplete
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 #![allow(dead_code)]
 

src/test/ui/const-generics/cannot-infer-type-for-const-param.rs

@@ -1,6 +1,8 @@
 // check-pass
-#![feature(const_generics)]
-//~^ WARN the feature `const_generics` is incomplete
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 // This test confirms that the types can be inferred correctly for this example with const
 // generics. Previously this would ICE, and more recently error.

src/test/ui/const-generics/const-arg-type-arg-misordered.stderr → src/test/ui/const-generics/const-arg-type-arg-misordered.full.stderr

@@ -1,5 +1,5 @@
 error[E0747]: constant provided when a type was expected
-  --> $DIR/const-arg-type-arg-misordered.rs:6:35
+  --> $DIR/const-arg-type-arg-misordered.rs:8:35
    |
 LL | fn foo<const N: usize>() -> Array<N, ()> {
    |                                   ^

src/test/ui/const-generics/const-arg-type-arg-misordered.min.stderr

@@ -0,0 +1,12 @@
+error[E0747]: constant provided when a type was expected
+  --> $DIR/const-arg-type-arg-misordered.rs:8:35
+   |
+LL | fn foo<const N: usize>() -> Array<N, ()> {
+   |                                   ^
+   |
+   = note: type arguments must be provided before constant arguments
+   = help: reorder the arguments: types, then consts: `<T, N>`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0747`.

src/test/ui/const-generics/const-arg-type-arg-misordered.rs

@@ -1,9 +1,12 @@
-#![feature(const_generics)]
-#![allow(incomplete_features)]
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 type Array<T, const N: usize> = [T; N];
 
-fn foo<const N: usize>() -> Array<N, ()> { //~ ERROR constant provided when a type was expected
+fn foo<const N: usize>() -> Array<N, ()> {
+    //~^ ERROR constant provided when a type was expected
     unimplemented!()
 }
 

src/test/ui/const-generics/const-param-before-other-params.stderr → src/test/ui/const-generics/const-param-before-other-params.full.stderr

@@ -1,5 +1,5 @@
 error: lifetime parameters must be declared prior to const parameters
-  --> $DIR/const-param-before-other-params.rs:4:21
+  --> $DIR/const-param-before-other-params.rs:6:21
    |
 LL | fn bar<const X: (), 'a>(_: &'a ()) {
    |       --------------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, const X: ()>`

src/test/ui/const-generics/const-param-before-other-params.min.stderr

@@ -0,0 +1,32 @@
+error: lifetime parameters must be declared prior to const parameters
+  --> $DIR/const-param-before-other-params.rs:6:21
+   |
+LL | fn bar<const X: (), 'a>(_: &'a ()) {
+   |       --------------^^- help: reorder the parameters: lifetimes, then types, then consts: `<'a, const X: ()>`
+
+error: type parameters must be declared prior to const parameters
+  --> $DIR/const-param-before-other-params.rs:11:21
+   |
+LL | fn foo<const X: (), T>(_: &T) {}
+   |       --------------^- help: reorder the parameters: lifetimes, then types, then consts: `<T, const X: ()>`
+
+error: `()` is forbidden as the type of a const generic parameter
+  --> $DIR/const-param-before-other-params.rs:6:17
+   |
+LL | fn bar<const X: (), 'a>(_: &'a ()) {
+   |                 ^^
+   |
+   = note: the only supported types are integers, `bool` and `char`
+   = note: more complex types are supported with `#[feature(const_generics)]`
+
+error: `()` is forbidden as the type of a const generic parameter
+  --> $DIR/const-param-before-other-params.rs:11:17
+   |
+LL | fn foo<const X: (), T>(_: &T) {}
+   |                 ^^
+   |
+   = note: the only supported types are integers, `bool` and `char`
+   = note: more complex types are supported with `#[feature(const_generics)]`
+
+error: aborting due to 4 previous errors
+

src/test/ui/const-generics/const-param-before-other-params.rs

@@ -1,10 +1,15 @@
-#![allow(incomplete_features)]
-#![feature(const_generics)]
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 fn bar<const X: (), 'a>(_: &'a ()) {
     //~^ ERROR lifetime parameters must be declared prior to const parameters
+    //[min]~^^ ERROR `()` is forbidden as the type of a const generic parameter
 }
 
 fn foo<const X: (), T>(_: &T) {}
+//[min]~^ ERROR type parameters must be declared prior to const parameters
+//[min]~^^ ERROR `()` is forbidden as the type of a const generic parameter
 
 fn main() {}

src/test/ui/const-generics/issues/issue-63322-forbid-dyn.full.stderr

@@ -0,0 +1,9 @@
+error[E0741]: `&'static (dyn A + 'static)` must be annotated with `#[derive(PartialEq, Eq)]` to be used as the type of a const parameter
+  --> $DIR/issue-63322-forbid-dyn.rs:10:18
+   |
+LL | fn test<const T: &'static dyn A>() {
+   |                  ^^^^^^^^^^^^^^ `&'static (dyn A + 'static)` doesn't derive both `PartialEq` and `Eq`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0741`.

src/test/ui/const-generics/issues/issue-63322-forbid-dyn.min.stderr

@@ -0,0 +1,18 @@
+error: `&'static (dyn A + 'static)` is forbidden as the type of a const generic parameter
+  --> $DIR/issue-63322-forbid-dyn.rs:10:18
+   |
+LL | fn test<const T: &'static dyn A>() {
+   |                  ^^^^^^^^^^^^^^
+   |
+   = note: the only supported types are integers, `bool` and `char`
+   = note: more complex types are supported with `#[feature(const_generics)]`
+
+error[E0741]: `&'static (dyn A + 'static)` must be annotated with `#[derive(PartialEq, Eq)]` to be used as the type of a const parameter
+  --> $DIR/issue-63322-forbid-dyn.rs:10:18
+   |
+LL | fn test<const T: &'static dyn A>() {
+   |                  ^^^^^^^^^^^^^^ `&'static (dyn A + 'static)` doesn't derive both `PartialEq` and `Eq`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0741`.

src/test/ui/const-generics/issues/issue-63322-forbid-dyn.rs

@@ -1,12 +1,15 @@
-#![feature(const_generics)]
-//~^ WARN the feature `const_generics` is incomplete
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 trait A {}
 struct B;
 impl A for B {}
 
 fn test<const T: &'static dyn A>() {
     //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]` to be used
+    //[min]~^^ ERROR `&'static (dyn A + 'static)` is forbidden
     unimplemented!()
 }
 

src/test/ui/const-generics/issues/issue-64494.stderr → src/test/ui/const-generics/issues/issue-64494.full.stderr

@@ -1,13 +1,13 @@
 error: constant expression depends on a generic parameter
-  --> $DIR/issue-64494.rs:14:53
+  --> $DIR/issue-64494.rs:16:53
    |
 LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 5}>: True {}
    |                                                     ^^^^
    |
    = note: this may fail depending on what value the parameter takes
 
 error: constant expression depends on a generic parameter
-  --> $DIR/issue-64494.rs:16:53
+  --> $DIR/issue-64494.rs:19:53
    |
 LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 6}>: True {}
    |                                                     ^^^^

src/test/ui/const-generics/issues/issue-64494.min.stderr

@@ -0,0 +1,28 @@
+error: generic parameters must not be used inside of non trivial constant values
+  --> $DIR/issue-64494.rs:16:38
+   |
+LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 5}>: True {}
+   |                                      ^^^^^^ non-trivial anonymous constants must not depend on the parameter `T`
+   |
+   = help: it is currently only allowed to use either `T` or `{ T }` as generic constants
+
+error: generic parameters must not be used inside of non trivial constant values
+  --> $DIR/issue-64494.rs:19:38
+   |
+LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 6}>: True {}
+   |                                      ^^^^^^ non-trivial anonymous constants must not depend on the parameter `T`
+   |
+   = help: it is currently only allowed to use either `T` or `{ T }` as generic constants
+
+error[E0119]: conflicting implementations of trait `MyTrait`:
+  --> $DIR/issue-64494.rs:19:1
+   |
+LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 5}>: True {}
+   | ------------------------------------ first implementation here
+...
+LL | impl<T: Foo> MyTrait for T where Is<{T::VAL == 6}>: True {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0119`.

src/test/ui/const-generics/issues/issue-64494.rs

@@ -1,5 +1,7 @@
-#![feature(const_generics)]
-#![allow(incomplete_features)]
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 trait Foo {
     const VAL: usize;
@@ -12,8 +14,11 @@ struct Is<const T: bool>;
 impl True for Is<{true}> {}
 
 impl<T: Foo> MyTrait for T where Is<{T::VAL == 5}>: True {}
-//~^ ERROR constant expression depends on a generic parameter
+//[full]~^ ERROR constant expression depends on a generic parameter
+//[min]~^^ ERROR generic parameters must not be used inside of non trivial constant values
 impl<T: Foo> MyTrait for T where Is<{T::VAL == 6}>: True {}
-//~^ ERROR constant expression depends on a generic parameter
+//[full]~^ ERROR constant expression depends on a generic parameter
+//[min]~^^ ERROR generic parameters must not be used inside of non trivial constant values
+//[min]~| ERROR conflicting implementations of trait `MyTrait`
 
 fn main() {}

src/test/ui/const-generics/issues/issue-64519.rs

@@ -1,7 +1,8 @@
 // check-pass
-
-#![feature(const_generics)]
-//~^ WARN the feature `const_generics` is incomplete
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 
 struct Foo<const D: usize> {
     state: Option<[u8; D]>,

src/test/ui/const-generics/issues/issue-66205.full.stderr

@@ -0,0 +1,10 @@
+error: constant expression depends on a generic parameter
+  --> $DIR/issue-66205.rs:8:12
+   |
+LL |     fact::<{ N - 1 }>();
+   |            ^^^^^^^^^
+   |
+   = note: this may fail depending on what value the parameter takes
+
+error: aborting due to previous error
+

src/test/ui/const-generics/issues/issue-66205.min.stderr

@@ -0,0 +1,10 @@
+error: generic parameters must not be used inside of non trivial constant values
+  --> $DIR/issue-66205.rs:8:14
+   |
+LL |     fact::<{ N - 1 }>();
+   |              ^ non-trivial anonymous constants must not depend on the parameter `N`
+   |
+   = help: it is currently only allowed to use either `N` or `{ N }` as generic constants
+
+error: aborting due to previous error
+

src/test/ui/const-generics/issues/issue-66205.rs

@@ -1,10 +1,13 @@
+// revisions: full min
+#![cfg_attr(full, feature(const_generics))]
+#![cfg_attr(full, allow(incomplete_features))]
+#![cfg_attr(min, feature(min_const_generics))]
 #![allow(dead_code, unconditional_recursion)]
-#![feature(const_generics)]
-//~^ WARN the feature `const_generics` is incomplete
 
 fn fact<const N: usize>() {
     fact::<{ N - 1 }>();
-    //~^ ERROR constant expression depends on a generic parameter
+    //[full]~^ ERROR constant expression depends on a generic parameter
+    //[min]~^^ ERROR generic parameters must not be used inside of non trivial constant values
 }
 
 fn main() {}