Merge #2357

2357: Expand file! to dummy "" r=edwin0cheng a=kjeremy

See https://github.com/rust-analyzer/rust-analyzer/pull/2355#issuecomment-557541873

Co-authored-by: kjeremy <[email protected]>

1 files changed, 19 insertions, 0 deletions

diff --git a/crates/ra_hir/src/ty/tests.rs b/crates/ra_hir/src/ty/tests.rs
index 74c12a0a2..b4bdd81f6 100644
--- a/crates/ra_hir/src/ty/tests.rs
+++ b/crates/ra_hir/src/ty/tests.rs
@@ -4857,3 +4857,22 @@ fn main() {
     "###
     );
 }
+
+#[test]
+fn infer_builtin_macros_file() {
+    assert_snapshot!(
+        infer(r#"
+#[rustc_builtin_macro]
+macro_rules! file {() => {}}
+
+fn main() {
+    let x = file!();
+}
+"#),
+        @r###"
+    ![0; 2) '""': &str
+    [64; 88) '{     ...!(); }': ()
+    [74; 75) 'x': &str
+    "###
+    );
+}