5 files changed, 41 insertions, 47 deletions

diff --git a/crates/ra_ide/src/completion/complete_postfix.rs b/crates/ra_ide/src/completion/complete_postfix.rs
index 646a30c76..5470dc291 100644
--- a/crates/ra_ide/src/completion/complete_postfix.rs
+++ b/crates/ra_ide/src/completion/complete_postfix.rs
@@ -12,7 +12,7 @@ use crate::{
 };
 
 pub(super) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
-    if ctx.db.feature_flags.get("completion.enable-postfix") == false {
+    if !ctx.db.feature_flags.get("completion.enable-postfix") {
         return;
     }
 
diff --git a/crates/ra_ide/src/completion/completion_context.rs b/crates/ra_ide/src/completion/completion_context.rs
index 981da2b79..4894ea2f6 100644
--- a/crates/ra_ide/src/completion/completion_context.rs
+++ b/crates/ra_ide/src/completion/completion_context.rs
@@ -239,16 +239,15 @@ impl<'a> CompletionContext<'a> {
                 .expr()
                 .map(|e| e.syntax().text_range())
                 .and_then(|r| find_node_with_range(original_file.syntax(), r));
-            self.dot_receiver_is_ambiguous_float_literal = if let Some(ast::Expr::Literal(l)) =
-                &self.dot_receiver
-            {
-                match l.kind() {
-                    ast::LiteralKind::FloatNumber { suffix: _ } => l.token().text().ends_with('.'),
-                    _ => false,
+            self.dot_receiver_is_ambiguous_float_literal =
+                if let Some(ast::Expr::Literal(l)) = &self.dot_receiver {
+                    match l.kind() {
+                        ast::LiteralKind::FloatNumber { .. } => l.token().text().ends_with('.'),
+                        _ => false,
+                    }
+                } else {
+                    false
                 }
-            } else {
-                false
-            }
         }
         if let Some(method_call_expr) = ast::MethodCallExpr::cast(parent) {
             // As above
diff --git a/crates/ra_ide/src/expand_macro.rs b/crates/ra_ide/src/expand_macro.rs
index 862c03304..bdbc31704 100644
--- a/crates/ra_ide/src/expand_macro.rs
+++ b/crates/ra_ide/src/expand_macro.rs
@@ -86,21 +86,18 @@ fn insert_whitespaces(syn: SyntaxNode) -> String {
         let mut is_next = |f: fn(SyntaxKind) -> bool, default| -> bool {
             token_iter.peek().map(|it| f(it.kind())).unwrap_or(default)
         };
-        let is_last = |f: fn(SyntaxKind) -> bool, default| -> bool {
-            last.map(|it| f(it)).unwrap_or(default)
-        };
+        let is_last =
+            |f: fn(SyntaxKind) -> bool, default| -> bool { last.map(f).unwrap_or(default) };
 
         res += &match token.kind() {
-            k @ _ if is_text(k) && is_next(|it| !it.is_punct(), true) => {
-                token.text().to_string() + " "
-            }
+            k if is_text(k) && is_next(|it| !it.is_punct(), true) => token.text().to_string() + " ",
             L_CURLY if is_next(|it| it != R_CURLY, true) => {
                 indent += 1;
-                let leading_space = if is_last(|it| is_text(it), false) { " " } else { "" };
+                let leading_space = if is_last(is_text, false) { " " } else { "" };
                 format!("{}{{\n{}", leading_space, "  ".repeat(indent))
             }
             R_CURLY if is_last(|it| it != L_CURLY, true) => {
-                indent = indent.checked_sub(1).unwrap_or(0);
+                indent = indent.saturating_sub(1);
                 format!("\n{}}}", "  ".repeat(indent))
             }
             R_CURLY => format!("}}\n{}", "  ".repeat(indent)),
diff --git a/crates/ra_ide/src/extend_selection.rs b/crates/ra_ide/src/extend_selection.rs
index c096ca6ae..1ec41a117 100644
--- a/crates/ra_ide/src/extend_selection.rs
+++ b/crates/ra_ide/src/extend_selection.rs
@@ -138,7 +138,7 @@ fn extend_ws(root: &SyntaxNode, ws: SyntaxToken, offset: TextUnit) -> TextRange
     ws.text_range()
 }
 
-fn pick_best<'a>(l: SyntaxToken, r: SyntaxToken) -> SyntaxToken {
+fn pick_best(l: SyntaxToken, r: SyntaxToken) -> SyntaxToken {
     return if priority(&r) > priority(&l) { r } else { l };
     fn priority(n: &SyntaxToken) -> usize {
         match n.kind() {
diff --git a/crates/ra_ide/src/syntax_highlighting.rs b/crates/ra_ide/src/syntax_highlighting.rs
index 657c7b21a..0228ee7e9 100644
--- a/crates/ra_ide/src/syntax_highlighting.rs
+++ b/crates/ra_ide/src/syntax_highlighting.rs
@@ -17,31 +17,31 @@ use crate::{
 };
 
 pub mod tags {
-    pub(crate) const FIELD: &'static str = "field";
-    pub(crate) const FUNCTION: &'static str = "function";
-    pub(crate) const MODULE: &'static str = "module";
-    pub(crate) const TYPE: &'static str = "type";
-    pub(crate) const CONSTANT: &'static str = "constant";
-    pub(crate) const MACRO: &'static str = "macro";
-    pub(crate) const VARIABLE: &'static str = "variable";
-    pub(crate) const VARIABLE_MUT: &'static str = "variable.mut";
-    pub(crate) const TEXT: &'static str = "text";
-
-    pub(crate) const TYPE_BUILTIN: &'static str = "type.builtin";
-    pub(crate) const TYPE_SELF: &'static str = "type.self";
-    pub(crate) const TYPE_PARAM: &'static str = "type.param";
-    pub(crate) const TYPE_LIFETIME: &'static str = "type.lifetime";
-
-    pub(crate) const LITERAL_BYTE: &'static str = "literal.byte";
-    pub(crate) const LITERAL_NUMERIC: &'static str = "literal.numeric";
-    pub(crate) const LITERAL_CHAR: &'static str = "literal.char";
-    pub(crate) const LITERAL_COMMENT: &'static str = "comment";
-    pub(crate) const LITERAL_STRING: &'static str = "string";
-    pub(crate) const LITERAL_ATTRIBUTE: &'static str = "attribute";
-
-    pub(crate) const KEYWORD_UNSAFE: &'static str = "keyword.unsafe";
-    pub(crate) const KEYWORD_CONTROL: &'static str = "keyword.control";
-    pub(crate) const KEYWORD: &'static str = "keyword";
+    pub(crate) const FIELD: &str = "field";
+    pub(crate) const FUNCTION: &str = "function";
+    pub(crate) const MODULE: &str = "module";
+    pub(crate) const TYPE: &str = "type";
+    pub(crate) const CONSTANT: &str = "constant";
+    pub(crate) const MACRO: &str = "macro";
+    pub(crate) const VARIABLE: &str = "variable";
+    pub(crate) const VARIABLE_MUT: &str = "variable.mut";
+    pub(crate) const TEXT: &str = "text";
+
+    pub(crate) const TYPE_BUILTIN: &str = "type.builtin";
+    pub(crate) const TYPE_SELF: &str = "type.self";
+    pub(crate) const TYPE_PARAM: &str = "type.param";
+    pub(crate) const TYPE_LIFETIME: &str = "type.lifetime";
+
+    pub(crate) const LITERAL_BYTE: &str = "literal.byte";
+    pub(crate) const LITERAL_NUMERIC: &str = "literal.numeric";
+    pub(crate) const LITERAL_CHAR: &str = "literal.char";
+    pub(crate) const LITERAL_COMMENT: &str = "comment";
+    pub(crate) const LITERAL_STRING: &str = "string";
+    pub(crate) const LITERAL_ATTRIBUTE: &str = "attribute";
+
+    pub(crate) const KEYWORD_UNSAFE: &str = "keyword.unsafe";
+    pub(crate) const KEYWORD_CONTROL: &str = "keyword.control";
+    pub(crate) const KEYWORD: &str = "keyword";
 }
 
 #[derive(Debug)]
@@ -258,9 +258,7 @@ fn highlight_name(db: &RootDatabase, name_kind: NameKind) -> &'static str {
         SelfType(_) => tags::TYPE_SELF,
         TypeParam(_) => tags::TYPE_PARAM,
         Local(local) => {
-            if local.is_mut(db) {
-                tags::VARIABLE_MUT
-            } else if local.ty(db).is_mutable_reference() {
+            if local.is_mut(db) || local.ty(db).is_mutable_reference() {
                 tags::VARIABLE_MUT
             } else {
                 tags::VARIABLE