add test

Author: asukaminato0721

tests/rustdoc/const-generics/const-param-type-references-generics.rs

@@ -0,0 +1,16 @@
+//! rustdoc regression test for #149288: const generic parameter types may depend on
+//! other generics when `generic_const_parameter_types` is enabled.
+#![allow(incomplete_features)]
+#![feature(adt_const_params, generic_const_parameter_types)]
+#![crate_name = "foo"]
+
+pub struct Bar<const N: usize, const M: [u8; N]>;
+
+pub fn takes<const N: usize, const M: [u8; N]>(_: Bar<N, M>) {}
+
+pub fn instantiate() {
+    takes(Bar::<2, { [1; 2] }>);
+}
+
+//@ has foo/struct.Bar.html '//pre[@class="rust item-decl"]' 'pub struct Bar<const N: usize, const M: [u8; N]>'
+//@ has foo/fn.takes.html '//pre[@class="rust item-decl"]' 'pub fn takes<const N: usize, const M: [u8; N]>(_: Bar<N, M>)'