style: Use ? in Option more often.

2 files changed, 13 insertions, 23 deletions

diff --git a/components/style/properties/declaration_block.rs b/components/style/properties/declaration_block.rs
index 788d39c4b48..0341edfae82 100644
--- a/components/style/properties/declaration_block.rs
+++ b/components/style/properties/declaration_block.rs
@@ -140,14 +140,9 @@ impl<'a> Iterator for NormalDeclarationIterator<'a> {
 
     fn next(&mut self) -> Option<Self::Item> {
         loop {
-            let next = self.0.iter.next();
-            match next {
-                Some((decl, importance)) => {
-                    if !importance {
-                        return Some(decl);
-                    }
-                },
-                None => return None,
+            let (decl, importance) = self.0.iter.next()?;
+            if !importance {
+                return Some(decl);
             }
         }
     }
@@ -171,7 +166,7 @@ impl<'a, 'cx, 'cx_a:'cx> AnimationValueIterator<'a, 'cx, 'cx_a> {
         declarations: &'a PropertyDeclarationBlock,
         context: &'cx mut Context<'cx_a>,
         default_values: &'a ComputedValues,
-       extra_custom_properties: Option<&'a Arc<::custom_properties::CustomPropertiesMap>>,
+        extra_custom_properties: Option<&'a Arc<::custom_properties::CustomPropertiesMap>>,
     ) -> AnimationValueIterator<'a, 'cx, 'cx_a> {
         AnimationValueIterator {
             iter: declarations.normal_declaration_iter(),
@@ -187,11 +182,7 @@ impl<'a, 'cx, 'cx_a:'cx> Iterator for AnimationValueIterator<'a, 'cx, 'cx_a> {
     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
         loop {
-            let next = self.iter.next();
-            let decl = match next {
-                Some(decl) => decl,
-                None => return None,
-            };
+            let decl = self.iter.next()?;
 
             let animation = AnimationValue::from_declaration(
                 decl,
diff --git a/components/style/properties/properties.mako.rs b/components/style/properties/properties.mako.rs
index 4c05a1541f4..bdabec78fe3 100644
--- a/components/style/properties/properties.mako.rs
+++ b/components/style/properties/properties.mako.rs
@@ -850,11 +850,13 @@ impl ShorthandId {
     /// Finds and returns an appendable value for the given declarations.
     ///
     /// Returns the optional appendable value.
-    pub fn get_shorthand_appendable_value<'a, I>(self,
-                                                 declarations: I)
-                                                 -> Option<AppendableValue<'a, I::IntoIter>>
-        where I: IntoIterator<Item=&'a PropertyDeclaration>,
-              I::IntoIter: Clone,
+    pub fn get_shorthand_appendable_value<'a, I>(
+        self,
+        declarations: I,
+    ) -> Option<AppendableValue<'a, I::IntoIter>>
+    where
+        I: IntoIterator<Item=&'a PropertyDeclaration>,
+        I::IntoIter: Clone,
     {
         let declarations = declarations.into_iter();
 
@@ -862,10 +864,7 @@ impl ShorthandId {
         let mut declarations2 = declarations.clone();
         let mut declarations3 = declarations.clone();
 
-        let first_declaration = match declarations2.next() {
-            Some(declaration) => declaration,
-            None => return None
-        };
+        let first_declaration = declarations2.next()?;
 
         // https://drafts.csswg.org/css-variables/#variables-in-shorthands
         if let Some(css) = first_declaration.with_variables_from_shorthand(self) {