cover cross crate scenario

Author: cijiugechu

tests/rustdoc-html/auxiliary/fn-delegation-impl-trait-aux.rs

@@ -0,0 +1,8 @@
+#![feature(fn_delegation)]
+#![allow(incomplete_features)]
+
+pub fn external(_: impl FnOnce()) {}
+
+fn delegated_to(_: impl FnOnce()) {}
+
+pub reuse delegated_to as delegated;

tests/rustdoc-html/fn-delegation-impl-trait.rs

@@ -1,7 +1,10 @@
 // Regression test for <https://github.com/rust-lang/rust/issues/155728>
+//@ aux-crate:fn_delegation_impl_trait_aux=fn-delegation-impl-trait-aux.rs
 #![feature(fn_delegation)]
 #![allow(incomplete_features)]
 
+extern crate fn_delegation_impl_trait_aux as aux;
+
 fn foo(_: impl FnOnce()) {}
 
 //@ has fn_delegation_impl_trait/fn.top_level.html '//pre[@class="rust item-decl"]' 'pub fn top_level(arg0: impl FnOnce())'
@@ -31,4 +34,14 @@ pub trait T {
     reuse foo as provided;
 }
 
+//@ has fn_delegation_impl_trait/fn.cross_crate.html '//pre[@class="rust item-decl"]' 'pub fn cross_crate(arg0: impl FnOnce())'
+pub reuse aux::external as cross_crate;
+
+//@ has fn_delegation_impl_trait/fn.inlined_cross_crate_delegated.html '//pre[@class="rust item-decl"]' 'pub fn inlined_cross_crate_delegated(arg0: impl FnOnce())'
+#[doc(inline)]
+pub use aux::delegated as inlined_cross_crate_delegated;
+
+//@ has fn_delegation_impl_trait/fn.redelegated_cross_crate.html '//pre[@class="rust item-decl"]' 'pub fn redelegated_cross_crate(arg0: impl FnOnce())'
+pub reuse aux::delegated as redelegated_cross_crate;
+
 pub fn main() {}