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-rw-r--r--crates/ra_assists/src/handlers/change_return_type_to_result.rs33
1 files changed, 31 insertions, 2 deletions
diff --git a/crates/ra_assists/src/handlers/change_return_type_to_result.rs b/crates/ra_assists/src/handlers/change_return_type_to_result.rs
index c6baa0a57..855baf187 100644
--- a/crates/ra_assists/src/handlers/change_return_type_to_result.rs
+++ b/crates/ra_assists/src/handlers/change_return_type_to_result.rs
@@ -4,6 +4,7 @@ use ra_syntax::{
4}; 4};
5 5
6use crate::{AssistContext, AssistId, Assists}; 6use crate::{AssistContext, AssistId, Assists};
7use test_utils::mark;
7 8
8// Assist: change_return_type_to_result 9// Assist: change_return_type_to_result
9// 10//
@@ -22,8 +23,13 @@ pub(crate) fn change_return_type_to_result(acc: &mut Assists, ctx: &AssistContex
22 let fn_def = ret_type.syntax().parent().and_then(ast::FnDef::cast)?; 23 let fn_def = ret_type.syntax().parent().and_then(ast::FnDef::cast)?;
23 24
24 let type_ref = &ret_type.type_ref()?; 25 let type_ref = &ret_type.type_ref()?;
25 if type_ref.syntax().text().to_string().starts_with("Result<") { 26 let ret_type_str = type_ref.syntax().text().to_string();
26 return None; 27 let first_part_ret_type = ret_type_str.splitn(2, '<').next();
28 if let Some(ret_type_first_part) = first_part_ret_type {
29 if ret_type_first_part.ends_with("Result") {
30 mark::hit!(change_return_type_to_result_simple_return_type_already_result);
31 return None;
32 }
27 } 33 }
28 34
29 let block_expr = &fn_def.body()?; 35 let block_expr = &fn_def.body()?;
@@ -297,6 +303,29 @@ mod tests {
297 } 303 }
298 304
299 #[test] 305 #[test]
306 fn change_return_type_to_result_simple_return_type_already_result_std() {
307 check_assist_not_applicable(
308 change_return_type_to_result,
309 r#"fn foo() -> std::result::Result<i32<|>, String> {
310 let test = "test";
311 return 42i32;
312 }"#,
313 );
314 }
315
316 #[test]
317 fn change_return_type_to_result_simple_return_type_already_result() {
318 mark::check!(change_return_type_to_result_simple_return_type_already_result);
319 check_assist_not_applicable(
320 change_return_type_to_result,
321 r#"fn foo() -> Result<i32<|>, String> {
322 let test = "test";
323 return 42i32;
324 }"#,
325 );
326 }
327
328 #[test]
300 fn change_return_type_to_result_simple_with_cursor() { 329 fn change_return_type_to_result_simple_with_cursor() {
301 check_assist( 330 check_assist(
302 change_return_type_to_result, 331 change_return_type_to_result,