redo tests

src/test/ui/const-generics/defaults/cec-concrete-default.rs

@@ -0,0 +1,14 @@
+#![feature(const_generics, const_evaluatable_checked, const_generics_defaults)]
+#![allow(incomplete_features)]
+
+struct Foo<const N: usize, const M: usize = { N + 1 }>;
+fn no_constraining() -> Foo<10> {
+    Foo::<10, 11>
+}
+
+pub fn different_than_default() -> Foo<10> {
+    Foo::<10, 12>
+    //~^ error: mismatched types
+}
+
+fn main() {}

src/test/ui/const-generics/defaults/cec-concrete-default.stderr

@@ -0,0 +1,12 @@
+error[E0308]: mismatched types
+  --> $DIR/cec-concrete-default.rs:10:5
+   |
+LL |     Foo::<10, 12>
+   |     ^^^^^^^^^^^^^ expected `11_usize`, found `12_usize`
+   |
+   = note: expected type `11_usize`
+              found type `12_usize`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

src/test/ui/const-generics/defaults/cec-generic-default-mismatched-types.rs

@@ -0,0 +1,16 @@
+#![feature(const_generics, const_evaluatable_checked, const_generics_defaults)]
+#![allow(incomplete_features)]
+
+struct Foo<const N: usize, const M: usize = { N + 1 }>;
+fn should_unify<const N: usize>() -> Foo<N> where [(); { N + 1 }]: {
+    Foo::<N, { N + 1 }>
+}
+pub fn shouldnt_unify<const N: usize>() -> Foo<N>
+where
+    [(); { N + 1 }]:,
+    [(); { N + 2 }]:, {
+    Foo::<N, { N + 2 }>
+    //~^ error: mismatched types
+}
+
+fn main() {}

src/test/ui/const-generics/defaults/cec-generic-default-mismatched-types.stderr

@@ -0,0 +1,12 @@
+error[E0308]: mismatched types
+  --> $DIR/cec-generic-default-mismatched-types.rs:12:5
+   |
+LL |     Foo::<N, { N + 2 }>
+   |     ^^^^^^^^^^^^^^^^^^^ expected `{ N + 1 }`, found `{ N + 2 }`
+   |
+   = note: expected type `{ N + 1 }`
+              found type `{ N + 2 }`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.

src/test/ui/const-generics/defaults/cec-generic-default.rs

@@ -0,0 +1,24 @@
+#![feature(const_evaluatable_checked, const_generics, const_generics_defaults)]
+#![allow(incomplete_features)]
+
+pub struct Foo<const N: usize, const M: usize = { N + 1 }>;
+pub fn needs_evaluatable_bound<const N1: usize>() -> Foo<N1> {
+    //~^ error: unconstrained generic constant
+    loop {}
+}
+pub fn has_evaluatable_bound<const N1: usize>() -> Foo<N1> where [(); N1 + 1]: {
+    loop {}
+}
+
+type FooAlias<const N: usize, const NP: usize = { N + 1 }> = [(); NP];
+fn needs_evaluatable_bound_alias<T, const N: usize>() -> FooAlias<N>
+{
+    //~^^ error: unconstrained generic constant
+    todo!()
+}
+fn has_evaluatable_bound_alias<const N: usize>() -> FooAlias<N>
+where [(); N + 1]: {
+    todo!()
+}
+
+fn main() {}

src/test/ui/const-generics/defaults/cec-generic-default.stderr

@@ -0,0 +1,18 @@
+error: unconstrained generic constant
+  --> $DIR/cec-generic-default.rs:5:54
+   |
+LL | pub fn needs_evaluatable_bound<const N1: usize>() -> Foo<N1> {
+   |                                                      ^^^^^^^
+   |
+   = help: try adding a `where` bound using this expression: `where [(); { N + 1 }]:`
+
+error: unconstrained generic constant
+  --> $DIR/cec-generic-default.rs:14:58
+   |
+LL | fn needs_evaluatable_bound_alias<T, const N: usize>() -> FooAlias<N>
+   |                                                          ^^^^^^^^^^^
+   |
+   = help: try adding a `where` bound using this expression: `where [(); { N + 1 }]:`
+
+error: aborting due to 2 previous errors
+