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-rw-r--r--crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs17
1 files changed, 17 insertions, 0 deletions
diff --git a/crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs b/crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs
index 870a8d4ff..47d8b9c91 100644
--- a/crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs
+++ b/crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs
@@ -47,6 +47,11 @@ pub(crate) fn replace_derive_with_manual_impl(
47 return None; 47 return None;
48 } 48 }
49 49
50 if !args.syntax().text_range().contains(ctx.offset()) {
51 cov_mark::hit!(outside_of_attr_args);
52 return None;
53 }
54
50 let trait_token = args.syntax().token_at_offset(ctx.offset()).find(|t| t.kind() == IDENT)?; 55 let trait_token = args.syntax().token_at_offset(ctx.offset()).find(|t| t.kind() == IDENT)?;
51 let trait_name = trait_token.text(); 56 let trait_name = trait_token.text();
52 57
@@ -396,4 +401,16 @@ struct Foo {}
396 ", 401 ",
397 ) 402 )
398 } 403 }
404
405 #[test]
406 fn works_at_start_of_file() {
407 cov_mark::check!(outside_of_attr_args);
408 check_assist_not_applicable(
409 replace_derive_with_manual_impl,
410 r#"
411$0#[derive(Debug)]
412struct S;
413 "#,
414 );
415 }
399} 416}