Add generic arg infer

src/test/ui/const-generics/issues/issue-62878.full.stderr

@@ -4,13 +4,13 @@ error[E0770]: the type of const parameters must not depend on other generic para
 LL | fn foo<const N: usize, const A: [u8; N]>() {}
    |                                      ^ the type must not depend on the parameter `N`
 
-error[E0747]: type provided when a constant was expected
-  --> $DIR/issue-62878.rs:10:11
+error: constant expression depends on a generic parameter
+  --> $DIR/issue-62878.rs:10:14
    |
 LL |     foo::<_, {[1]}>();
-   |           ^
+   |              ^^^^^
    |
-   = help: const arguments cannot yet be inferred with `_`
+   = note: this may fail depending on what value the parameter takes
 
 error[E0308]: mismatched types
   --> $DIR/issue-62878.rs:10:15
@@ -20,5 +20,5 @@ LL |     foo::<_, {[1]}>();
 
 error: aborting due to 3 previous errors
 
-Some errors have detailed explanations: E0308, E0747, E0770.
+Some errors have detailed explanations: E0308, E0770.
 For more information about an error, try `rustc --explain E0308`.

src/test/ui/const-generics/issues/issue-62878.rs

@@ -8,6 +8,6 @@ fn foo<const N: usize, const A: [u8; N]>() {}
 
 fn main() {
     foo::<_, {[1]}>();
-    //[full]~^ ERROR type provided when a constant was expected
-    //[full]~| ERROR mismatched types
+    //[full]~^ ERROR mismatched types
+    //[full]~| ERROR constant expression
 }

src/test/ui/const-generics/min_const_generics/inferred_const.rs

@@ -1,8 +1,8 @@
-#![feature(min_const_generics)]
-fn foo<const N: usize, const K: usize>(data: [u32; N]) -> [u32; K] {
+// run-pass
+
+fn foo<const N: usize, const K: usize>(_data: [u32; N]) -> [u32; K] {
     [0; K]
 }
 fn main() {
-    let a = foo::<_, 2>([0, 1, 2]);
-               //~^ ERROR type provided when a constant was expected
+    let _a = foo::<_, 2>([0, 1, 2]);
 }

src/test/ui/const-generics/min_const_generics/inferred_const.stderr

@@ -1,11 +0,0 @@
-error[E0747]: type provided when a constant was expected
-  --> $DIR/inferred_const.rs:6:19
-   |
-LL |     let a = foo::<_, 2>([0, 1, 2]);
-   |                   ^
-   |
-   = help: const arguments cannot yet be inferred with `_`
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0747`.

src/test/ui/parser/issue-14303-fncall.rs

@@ -11,7 +11,7 @@ fn foo<'a, 'b>(start: &'a usize, end: &'a usize) {
     let _x = (*start..*end)
         .map(|x| S { a: start, b: end })
         .collect::<Vec<S<_, 'a>>>();
-        //~^ ERROR type provided when a lifetime was expected
+        //~^ ERROR inferred provided when a lifetime was expected
 }
 
 fn main() {}

src/test/ui/parser/issue-14303-fncall.stderr

@@ -1,4 +1,4 @@
-error[E0747]: type provided when a lifetime was expected
+error[E0747]: inferred provided when a lifetime was expected
   --> $DIR/issue-14303-fncall.rs:13:26
    |
 LL |         .collect::<Vec<S<_, 'a>>>();

src/test/ui/privacy/associated-item-privacy-trait.stderr

@@ -273,17 +273,6 @@ LL |     priv_parent_substs::mac!();
    |
    = note: this error originates in the macro `priv_parent_substs::mac` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: type `priv_parent_substs::Priv` is private
-  --> $DIR/associated-item-privacy-trait.rs:117:30
-   |
-LL |         let _: <Pub as PubTr<_>>::AssocTy;
-   |                              ^ private type
-...
-LL |     priv_parent_substs::mac!();
-   |     --------------------------- in this macro invocation
-   |
-   = note: this error originates in the macro `priv_parent_substs::mac` (in Nightly builds, run with -Z macro-backtrace for more info)
-
 error: type `priv_parent_substs::Priv` is private
   --> $DIR/associated-item-privacy-trait.rs:119:17
    |
@@ -328,5 +317,5 @@ LL |     priv_parent_substs::mac!();
    |
    = note: this error originates in the macro `priv_parent_substs::mac` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to 30 previous errors
+error: aborting due to 29 previous errors