add more complex param order test

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

@@ -6,4 +6,11 @@ struct Bad<const N: usize, T> { //~ ERROR type parameters must be declared prior
     another: T,
 }
 
+struct AlsoBad<const N: usize, 'a, T, 'b, const M: usize, U> {
+    //~^ ERROR type parameters must be declared prior
+    //~| ERROR lifetime parameters must be declared prior
+    a: &'a T,
+    b: &'b U,
+}
+
 fn main() { }

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

@@ -4,6 +4,18 @@ error: type parameters must be declared prior to const parameters
 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:9:32
+   |
+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:9:36
+   |
+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>`
+
 warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
   --> $DIR/argument_order.rs:1:12
    |
@@ -13,5 +25,5 @@ LL | #![feature(const_generics)]
    = note: `#[warn(incomplete_features)]` on by default
    = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to 3 previous errors; 1 warning emitted