Merge #138

138: Fix some clippy lints r=matklad a=alanhdu

I went ahead and fixed all the clippy lints (there were a couple I thought would be better unfixed and added `cfg` statements to allow them) and also re-enabled clippy and rustfmt in CI.

They were disabled with `no time to explain, disable clippy checks`, so hopefully this won't go against whatever the reason at the time was 😆.

One question about the CI though: right now, it's an allowed failure that runs against the latest nightly each time. Would it be better to pin it to a specific nightly (or use the `beta` versions) to lower the churn?

Co-authored-by: Alan Du <alanhdu@gmail.com>

crates/ra_analysis/src/db.rs

@@ -87,12 +87,18 @@ salsa::query_group! {
     }
 }
 
-#[derive(Default, Debug, PartialEq, Eq)]
+#[derive(Default, Debug, Eq)]
 pub(crate) struct FileSet {
     pub(crate) files: FxHashSet<FileId>,
     pub(crate) resolver: FileResolverImp,
 }
 
+impl PartialEq for FileSet {
+    fn eq(&self, other: &FileSet) -> bool {
+        self.files == other.files && self.resolver == other.resolver
+    }
+}
+
 impl Hash for FileSet {
     fn hash<H: Hasher>(&self, hasher: &mut H) {
         let mut files = self.files.iter().cloned().collect::<Vec<_>>();

crates/ra_analysis/src/descriptors.rs

@@ -22,7 +22,7 @@ impl ModuleDescriptor {
     }
 }
 
-fn modules<'a>(root: ast::Root<'a>) -> impl Iterator<Item = (SmolStr, ast::Module<'a>)> {
+fn modules(root: ast::Root<'_>) -> impl Iterator<Item = (SmolStr, ast::Module<'_>)> {
     root.modules().filter_map(|module| {
         let name = module.name()?.text();
         if !module.has_semi() {
@@ -184,8 +184,7 @@ impl Link {
         root: ast::Root<'a>,
     ) -> ast::Module<'a> {
         modules(root)
-            .filter(|(name, _)| name == &tree.link(self).name)
-            .next()
+            .find(|(name, _)| name == &tree.link(self).name)
             .unwrap()
             .1
     }

crates/ra_analysis/src/imp.rs

@@ -426,12 +426,12 @@ impl AnalysisImpl {
                                     .text()
                                     .slice(range_search)
                                     .to_string()
-                                    .matches(",")
+                                    .matches(',')
                                     .count();
 
                                 // If we have a method call eat the first param since it's just self.
                                 if has_self {
-                                    commas = commas + 1;
+                                    commas += 1;
                                 }
 
                                 current_parameter = Some(commas);