Rollup merge of #101006 - GuillaumeGomez:doc-cfg-reexport, r=notriddle

Fix doc cfg on reexports

Fixes #83428.

The problem was that the newly inlined item cfg propagation was not working since its real parent is different than its current one.

For the implementation, I decided to put it directly into `CfgPropagation` instead of inside `inline.rs` because I thought it would be simpler to maintain and to not forget if new kind of items are added if it's all done in one place.

r? `@notriddle`

1 files changed, 33 insertions, 0 deletions

diff --git a/src/test/rustdoc/cfg_doc_reexport.rs b/src/test/rustdoc/cfg_doc_reexport.rs
new file mode 100644
index 00000000000..addb6709db1
--- /dev/null
+++ b/src/test/rustdoc/cfg_doc_reexport.rs
@@ -0,0 +1,33 @@
+#![feature(doc_cfg)]
+#![feature(no_core)]
+
+#![crate_name = "foo"]
+#![no_core]
+
+// @has 'foo/index.html'
+// @has - '//*[@class="item-left module-item"]/*[@class="stab portability"]' 'foobar'
+// @has - '//*[@class="item-left module-item"]/*[@class="stab portability"]' 'bar'
+
+#[doc(cfg(feature = "foobar"))]
+mod imp_priv {
+    // @has 'foo/struct.BarPriv.html'
+    // @has - '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
+    //    'Available on crate feature foobar only.'
+    pub struct BarPriv {}
+    impl BarPriv {
+        pub fn test() {}
+    }
+}
+#[doc(cfg(feature = "foobar"))]
+pub use crate::imp_priv::*;
+
+pub mod bar {
+    // @has 'foo/bar/struct.Bar.html'
+    // @has - '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
+    //    'Available on crate feature bar only.'
+    #[doc(cfg(feature = "bar"))]
+    pub struct Bar;
+}
+
+#[doc(cfg(feature = "bar"))]
+pub use bar::Bar;