27 files changed, 17 insertions, 33 deletions

diff --git a/crates/ra_assists/src/assist_ctx.rs b/crates/ra_assists/src/assist_ctx.rs
index 44d6f6808..81f999090 100644
--- a/crates/ra_assists/src/assist_ctx.rs
+++ b/crates/ra_assists/src/assist_ctx.rs
@@ -19,6 +19,8 @@ pub(crate) enum Assist {
     Resolved { assist: ResolvedAssist },
 }
 
+pub(crate) type AssistHandler = fn(AssistCtx) -> Option<Assist>;
+
 /// `AssistCtx` allows to apply an assist or check if it could be applied.
 ///
 /// Assists use a somewhat over-engineered approach, given the current needs. The
diff --git a/crates/ra_assists/src/assists/add_custom_impl.rs b/crates/ra_assists/src/handlers/add_custom_impl.rs
index 7fdd816bf..7fdd816bf 100644
--- a/crates/ra_assists/src/assists/add_custom_impl.rs
+++ b/crates/ra_assists/src/handlers/add_custom_impl.rs
diff --git a/crates/ra_assists/src/assists/add_derive.rs b/crates/ra_assists/src/handlers/add_derive.rs
index b0d1a0a80..b0d1a0a80 100644
--- a/crates/ra_assists/src/assists/add_derive.rs
+++ b/crates/ra_assists/src/handlers/add_derive.rs
diff --git a/crates/ra_assists/src/assists/add_explicit_type.rs b/crates/ra_assists/src/handlers/add_explicit_type.rs
index 2cb9d2f48..2cb9d2f48 100644
--- a/crates/ra_assists/src/assists/add_explicit_type.rs
+++ b/crates/ra_assists/src/handlers/add_explicit_type.rs
diff --git a/crates/ra_assists/src/assists/add_impl.rs b/crates/ra_assists/src/handlers/add_impl.rs
index 241b085fd..241b085fd 100644
--- a/crates/ra_assists/src/assists/add_impl.rs
+++ b/crates/ra_assists/src/handlers/add_impl.rs
diff --git a/crates/ra_assists/src/assists/add_import.rs b/crates/ra_assists/src/handlers/add_import.rs
index f03dddac8..f03dddac8 100644
--- a/crates/ra_assists/src/assists/add_import.rs
+++ b/crates/ra_assists/src/handlers/add_import.rs
diff --git a/crates/ra_assists/src/assists/add_missing_impl_members.rs b/crates/ra_assists/src/handlers/add_missing_impl_members.rs
index 448697d31..448697d31 100644
--- a/crates/ra_assists/src/assists/add_missing_impl_members.rs
+++ b/crates/ra_assists/src/handlers/add_missing_impl_members.rs
diff --git a/crates/ra_assists/src/assists/add_new.rs b/crates/ra_assists/src/handlers/add_new.rs
index a08639311..a08639311 100644
--- a/crates/ra_assists/src/assists/add_new.rs
+++ b/crates/ra_assists/src/handlers/add_new.rs
diff --git a/crates/ra_assists/src/assists/apply_demorgan.rs b/crates/ra_assists/src/handlers/apply_demorgan.rs
index ba08a8223..ba08a8223 100644
--- a/crates/ra_assists/src/assists/apply_demorgan.rs
+++ b/crates/ra_assists/src/handlers/apply_demorgan.rs
diff --git a/crates/ra_assists/src/assists/auto_import.rs b/crates/ra_assists/src/handlers/auto_import.rs
index 84b5474f9..84b5474f9 100644
--- a/crates/ra_assists/src/assists/auto_import.rs
+++ b/crates/ra_assists/src/handlers/auto_import.rs
diff --git a/crates/ra_assists/src/assists/change_visibility.rs b/crates/ra_assists/src/handlers/change_visibility.rs
index f325b6f92..f325b6f92 100644
--- a/crates/ra_assists/src/assists/change_visibility.rs
+++ b/crates/ra_assists/src/handlers/change_visibility.rs
diff --git a/crates/ra_assists/src/assists/early_return.rs b/crates/ra_assists/src/handlers/early_return.rs
index 8f30dc586..8eb3bd473 100644
--- a/crates/ra_assists/src/assists/early_return.rs
+++ b/crates/ra_assists/src/handlers/early_return.rs
@@ -10,7 +10,7 @@ use ra_syntax::{
 
 use crate::{
     assist_ctx::{Assist, AssistCtx},
-    assists::invert_if::invert_boolean_expression,
+    handlers::invert_if::invert_boolean_expression,
     AssistId,
 };
 
diff --git a/crates/ra_assists/src/assists/fill_match_arms.rs b/crates/ra_assists/src/handlers/fill_match_arms.rs
index 0908fc246..0908fc246 100644
--- a/crates/ra_assists/src/assists/fill_match_arms.rs
+++ b/crates/ra_assists/src/handlers/fill_match_arms.rs
diff --git a/crates/ra_assists/src/assists/flip_binexpr.rs b/crates/ra_assists/src/handlers/flip_binexpr.rs
index bfcc09e90..bfcc09e90 100644
--- a/crates/ra_assists/src/assists/flip_binexpr.rs
+++ b/crates/ra_assists/src/handlers/flip_binexpr.rs
diff --git a/crates/ra_assists/src/assists/flip_comma.rs b/crates/ra_assists/src/handlers/flip_comma.rs
index 1dacf29f8..1dacf29f8 100644
--- a/crates/ra_assists/src/assists/flip_comma.rs
+++ b/crates/ra_assists/src/handlers/flip_comma.rs
diff --git a/crates/ra_assists/src/assists/flip_trait_bound.rs b/crates/ra_assists/src/handlers/flip_trait_bound.rs
index f56769624..f56769624 100644
--- a/crates/ra_assists/src/assists/flip_trait_bound.rs
+++ b/crates/ra_assists/src/handlers/flip_trait_bound.rs
diff --git a/crates/ra_assists/src/assists/inline_local_variable.rs b/crates/ra_assists/src/handlers/inline_local_variable.rs
index 91b588243..91b588243 100644
--- a/crates/ra_assists/src/assists/inline_local_variable.rs
+++ b/crates/ra_assists/src/handlers/inline_local_variable.rs
diff --git a/crates/ra_assists/src/assists/introduce_variable.rs b/crates/ra_assists/src/handlers/introduce_variable.rs
index 7312ce687..7312ce687 100644
--- a/crates/ra_assists/src/assists/introduce_variable.rs
+++ b/crates/ra_assists/src/handlers/introduce_variable.rs
diff --git a/crates/ra_assists/src/assists/invert_if.rs b/crates/ra_assists/src/handlers/invert_if.rs
index 983392f21..983392f21 100644
--- a/crates/ra_assists/src/assists/invert_if.rs
+++ b/crates/ra_assists/src/handlers/invert_if.rs
diff --git a/crates/ra_assists/src/assists/merge_match_arms.rs b/crates/ra_assists/src/handlers/merge_match_arms.rs
index 670614dd8..670614dd8 100644
--- a/crates/ra_assists/src/assists/merge_match_arms.rs
+++ b/crates/ra_assists/src/handlers/merge_match_arms.rs
diff --git a/crates/ra_assists/src/assists/move_bounds.rs b/crates/ra_assists/src/handlers/move_bounds.rs
index 90793b5fc..90793b5fc 100644
--- a/crates/ra_assists/src/assists/move_bounds.rs
+++ b/crates/ra_assists/src/handlers/move_bounds.rs
diff --git a/crates/ra_assists/src/assists/move_guard.rs b/crates/ra_assists/src/handlers/move_guard.rs
index 2b91ce7c4..2b91ce7c4 100644
--- a/crates/ra_assists/src/assists/move_guard.rs
+++ b/crates/ra_assists/src/handlers/move_guard.rs
diff --git a/crates/ra_assists/src/assists/raw_string.rs b/crates/ra_assists/src/handlers/raw_string.rs
index 2c0a1e126..2c0a1e126 100644
--- a/crates/ra_assists/src/assists/raw_string.rs
+++ b/crates/ra_assists/src/handlers/raw_string.rs
diff --git a/crates/ra_assists/src/assists/remove_dbg.rs b/crates/ra_assists/src/handlers/remove_dbg.rs
index 5085649b4..5085649b4 100644
--- a/crates/ra_assists/src/assists/remove_dbg.rs
+++ b/crates/ra_assists/src/handlers/remove_dbg.rs
diff --git a/crates/ra_assists/src/assists/replace_if_let_with_match.rs b/crates/ra_assists/src/handlers/replace_if_let_with_match.rs
index e6cd50bc1..e6cd50bc1 100644
--- a/crates/ra_assists/src/assists/replace_if_let_with_match.rs
+++ b/crates/ra_assists/src/handlers/replace_if_let_with_match.rs
diff --git a/crates/ra_assists/src/assists/split_import.rs b/crates/ra_assists/src/handlers/split_import.rs
index 2c3f07a79..2c3f07a79 100644
--- a/crates/ra_assists/src/assists/split_import.rs
+++ b/crates/ra_assists/src/handlers/split_import.rs
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index d476088a2..7b08e8fd7 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -19,8 +19,8 @@ use ra_ide_db::RootDatabase;
 use ra_syntax::{TextRange, TextUnit};
 use ra_text_edit::TextEdit;
 
-pub(crate) use crate::assist_ctx::{Assist, AssistCtx};
-pub use crate::assists::add_import::auto_import_text_edit;
+pub(crate) use crate::assist_ctx::{Assist, AssistCtx, AssistHandler};
+pub use crate::handlers::add_import::auto_import_text_edit;
 
 /// Unique identifier of the assist, should not be shown to the user
 /// directly.
@@ -72,7 +72,7 @@ impl ResolvedAssist {
 /// returned, without actual edits.
 pub fn unresolved_assists(db: &RootDatabase, range: FileRange) -> Vec<AssistLabel> {
     let ctx = AssistCtx::new(db, range, false);
-    assists::all()
+    handlers::all()
         .iter()
         .filter_map(|f| f(ctx.clone()))
         .map(|a| match a {
@@ -88,7 +88,7 @@ pub fn unresolved_assists(db: &RootDatabase, range: FileRange) -> Vec<AssistLabe
 /// computed.
 pub fn resolved_assists(db: &RootDatabase, range: FileRange) -> Vec<ResolvedAssist> {
     let ctx = AssistCtx::new(db, range, true);
-    let mut a = assists::all()
+    let mut a = handlers::all()
         .iter()
         .filter_map(|f| f(ctx.clone()))
         .map(|a| match a {
@@ -109,8 +109,8 @@ fn sort_assists(assists: &mut [ResolvedAssist]) {
     });
 }
 
-mod assists {
-    use crate::{Assist, AssistCtx};
+mod handlers {
+    use crate::AssistHandler;
 
     mod add_derive;
     mod add_explicit_type;
@@ -138,7 +138,7 @@ mod assists {
     mod move_bounds;
     mod early_return;
 
-    pub(crate) fn all() -> &'static [fn(AssistCtx) -> Option<Assist>] {
+    pub(crate) fn all() -> &'static [AssistHandler] {
         &[
             add_derive::add_derive,
             add_explicit_type::add_explicit_type,
@@ -183,7 +183,7 @@ mod helpers {
     use ra_syntax::TextRange;
     use test_utils::{add_cursor, assert_eq_text, extract_offset, extract_range};
 
-    use crate::{Assist, AssistCtx};
+    use crate::{Assist, AssistCtx, AssistHandler};
 
     pub(crate) fn with_single_file(text: &str) -> (RootDatabase, FileId) {
         let (mut db, file_id) = RootDatabase::with_single_file(text);
@@ -194,7 +194,7 @@ mod helpers {
         (db, file_id)
     }
 
-    pub(crate) fn check_assist(assist: fn(AssistCtx) -> Option<Assist>, before: &str, after: &str) {
+    pub(crate) fn check_assist(assist: AssistHandler, before: &str, after: &str) {
         let (before_cursor_pos, before) = extract_offset(before);
         let (db, file_id) = with_single_file(&before);
         let frange =
@@ -218,11 +218,7 @@ mod helpers {
         assert_eq_text!(after, &actual);
     }
 
-    pub(crate) fn check_assist_range(
-        assist: fn(AssistCtx) -> Option<Assist>,
-        before: &str,
-        after: &str,
-    ) {
+    pub(crate) fn check_assist_range(assist: AssistHandler, before: &str, after: &str) {
         let (range, before) = extract_range(before);
         let (db, file_id) = with_single_file(&before);
         let frange = FileRange { file_id, range };
@@ -240,11 +236,7 @@ mod helpers {
         assert_eq_text!(after, &actual);
     }
 
-    pub(crate) fn check_assist_target(
-        assist: fn(AssistCtx) -> Option<Assist>,
-        before: &str,
-        target: &str,
-    ) {
+    pub(crate) fn check_assist_target(assist: AssistHandler, before: &str, target: &str) {
         let (before_cursor_pos, before) = extract_offset(before);
         let (db, file_id) = with_single_file(&before);
         let frange =
@@ -260,11 +252,7 @@ mod helpers {
         assert_eq_text!(&before[range.start().to_usize()..range.end().to_usize()], target);
     }
 
-    pub(crate) fn check_assist_range_target(
-        assist: fn(AssistCtx) -> Option<Assist>,
-        before: &str,
-        target: &str,
-    ) {
+    pub(crate) fn check_assist_range_target(assist: AssistHandler, before: &str, target: &str) {
         let (range, before) = extract_range(before);
         let (db, file_id) = with_single_file(&before);
         let frange = FileRange { file_id, range };
@@ -279,10 +267,7 @@ mod helpers {
         assert_eq_text!(&before[range.start().to_usize()..range.end().to_usize()], target);
     }
 
-    pub(crate) fn check_assist_not_applicable(
-        assist: fn(AssistCtx) -> Option<Assist>,
-        before: &str,
-    ) {
+    pub(crate) fn check_assist_not_applicable(assist: AssistHandler, before: &str) {
         let (before_cursor_pos, before) = extract_offset(before);
         let (db, file_id) = with_single_file(&before);
         let frange =
@@ -291,10 +276,7 @@ mod helpers {
         assert!(assist.is_none());
     }
 
-    pub(crate) fn check_assist_range_not_applicable(
-        assist: fn(AssistCtx) -> Option<Assist>,
-        before: &str,
-    ) {
+    pub(crate) fn check_assist_range_not_applicable(assist: AssistHandler, before: &str) {
         let (range, before) = extract_range(before);
         let (db, file_id) = with_single_file(&before);
         let frange = FileRange { file_id, range };