Merge #742

742: Extern crate r=matklad a=flodiebold

This implements `extern crate` declarations by lowering them to (absolute) imports, and adds support for absolute paths. It also extracts the extern prelude from the per-module item map, and handles the special case of extern crates in the crate root adding to the extern prelude.

This means we finally resolve `Arc`, so it fixes #523 :smile: 

Co-authored-by: Florian Diebold <[email protected]>

1 files changed, 14 insertions, 0 deletions

diff --git a/crates/ra_ide_api/src/completion/complete_scope.rs b/crates/ra_ide_api/src/completion/complete_scope.rs
index 44514ab2b..8674b1e66 100644
--- a/crates/ra_ide_api/src/completion/complete_scope.rs
+++ b/crates/ra_ide_api/src/completion/complete_scope.rs
@@ -111,6 +111,20 @@ mod tests {
     }
 
     #[test]
+    fn completes_extern_prelude() {
+        check_reference_completion(
+            "extern_prelude",
+            r"
+            //- /lib.rs
+            use <|>;
+
+            //- /other_crate/lib.rs
+            // nothing here
+            ",
+        );
+    }
+
+    #[test]
     fn completes_module_items_in_nested_modules() {
         check_reference_completion(
             "module_items_in_nested_modules",