Merge fn_empty_single_line and impl_empty_single_line into empty_item_single_line

Author: nrc

Configurations.md

@@ -874,10 +874,9 @@ struct Dolor<T>
 ```
 
 
+## `empty_item_single_line`
 
-## `fn_empty_single_line`
-
-Put empty-body functions on a single line
+Put empty-body functions and impls on a single line
 
 - **Default value**: `true`
 - **Possible values**: `true`, `false`
@@ -886,16 +885,21 @@ Put empty-body functions on a single line
 
 ```rust
 fn lorem() {}
+
+impl Lorem {}
 ```
 
 #### `false`:
 
 ```rust
 fn lorem() {
 }
+
+impl Lorem {
+}
 ```
 
-See also [`control_brace_style`](#control_brace_style).
+See also [`brace_style`](#brace_style), [`control_brace_style`](#control_brace_style).
 
 
 ## `fn_single_line`
@@ -1004,28 +1008,6 @@ fn lorem() -> usize {
 
 See also: [`tab_spaces`](#tab_spaces).
 
-## `impl_empty_single_line`
-
-Put empty-body implementations on a single line
-
-- **Default value**: `true`
-- **Possible values**: `true`, `false`
-
-#### `true` (default):
-
-```rust
-impl Lorem {}
-```
-
-#### `false`:
-
-```rust
-impl Lorem {
-}
-```
-
-See also [`brace_style`](#brace_style).
-
 
 ## `imports_indent`
 

src/config.rs

@@ -599,10 +599,10 @@ create_config! {
     normalize_comments: bool, false, true, "Convert /* */ comments to // comments where possible";
 
     // Single line expressions and items.
+    empty_item_single_line: bool, true, false,
+        "Put empty-body functions and impls on a single line";
     struct_lit_single_line: bool, true, false,
         "Put small struct literals on a single line";
-    impl_empty_single_line: bool, true, false, "Put empty-body implementations on a single line";
-    fn_empty_single_line: bool, true, false, "Put empty-body functions on a single line";
     fn_single_line: bool, false, false, "Put single-expression functions on a single line";
     where_single_line: bool, false, false, "To force single line where layout";
 

src/items.rs

@@ -366,7 +366,7 @@ impl<'a> FmtVisitor<'a> {
 
         let codemap = self.get_context().codemap;
 
-        if self.config.fn_empty_single_line() && is_empty_block(block, codemap)
+        if self.config.empty_item_single_line() && is_empty_block(block, codemap)
             && self.block_indent.width() + fn_str.len() + 2 <= self.config.max_width()
         {
             return Some(format!("{}{{}}", fn_str));
@@ -705,7 +705,7 @@ fn is_impl_single_line(
     let open_pos = snippet.find_uncommented("{")? + 1;
 
     Some(
-        context.config.impl_empty_single_line() && items.is_empty() && !result.contains('\n')
+        context.config.empty_item_single_line() && items.is_empty() && !result.contains('\n')
             && result.len() + where_clause_str.len() <= context.config.max_width()
             && !contains_comment(&snippet[open_pos..]),
     )

tests/source/configs-empty_item_single_line-false.rs

@@ -0,0 +1,17 @@
+// rustfmt-empty_item_single_line: false
+// Empty impl on single line
+
+impl Lorem {
+
+}
+
+impl Ipsum {
+
+}
+
+fn lorem() {
+}
+
+fn lorem() {
+
+}

tests/source/configs-empty_item_single_line-true.rs

@@ -0,0 +1,17 @@
+// rustfmt-empty_item_single_line: true
+// Empty impl on single line
+
+impl Lorem {
+
+}
+
+impl Ipsum {
+
+}
+
+fn lorem() {
+}
+
+fn lorem() {
+
+}

tests/source/configs-fn_empty_single_line-false.rs

@@ -0,0 +1,15 @@
+// rustfmt-empty_item_single_line: false
+// Empty impl on single line
+
+impl Lorem {
+}
+
+impl Ipsum {
+}
+
+fn lorem() {
+}
+
+fn lorem() {
+
+}

tests/source/configs-fn_empty_single_line-true.rs

@@ -0,0 +1,10 @@
+// rustfmt-empty_item_single_line: true
+// Empty impl on single line
+
+impl Lorem {}
+
+impl Ipsum {}
+
+fn lorem() {}
+
+fn lorem() {}