Fix warnings

src/domains.rs

@@ -192,12 +192,12 @@ pub(crate) fn find_authority_end(
                 }
             }
 
-            return (end, last_dot);
+            (end, last_dot)
         } else {
-            return (None, None);
+            (None, None)
         }
     } else {
-        return (end, last_dot);
+        (end, last_dot)
     }
 }
 

src/finder.rs

@@ -102,12 +102,14 @@ pub struct LinkFinder {
     url_can_be_iri: bool,
 }
 
+type TriggerFinder = dyn Fn(&[u8]) -> Option<usize>;
+
 /// Iterator for finding links.
 pub struct Links<'t> {
     text: &'t str,
     rewind: usize,
 
-    trigger_finder: Box<dyn Fn(&[u8]) -> Option<usize>>,
+    trigger_finder: Box<TriggerFinder>,
     email_scanner: EmailScanner,
     url_scanner: UrlScanner,
     domain_scanner: DomainScanner,
@@ -232,7 +234,7 @@ impl<'t> Links<'t> {
         };
 
         // With optional schemes URLs don't have unique `:`, then search for `.` as well
-        let trigger_finder: Box<dyn Fn(&[u8]) -> Option<usize>> = match (url, email) {
+        let trigger_finder: Box<TriggerFinder> = match (url, email) {
             (true, true) if url_must_have_scheme => Box::new(|s| memchr2(b':', b'@', s)),
             (true, true) => Box::new(|s| memchr3(b':', b'@', b'.', s)),
             (true, false) if url_must_have_scheme => Box::new(|s| memchr(b':', s)),
@@ -271,7 +273,7 @@ impl<'t> Iterator for Links<'t> {
                 let end = self.rewind + range.end;
                 self.rewind = end;
                 let link = Link {
-                    text: &self.text,
+                    text: self.text,
                     start,
                     end,
                     kind,
@@ -299,10 +301,10 @@ impl<'t> Iterator for Spans<'t> {
 
     fn next(&mut self) -> Option<Span<'t>> {
         match self.links.peek() {
-            Some(ref link) => {
+            Some(link) => {
                 if self.position < link.start {
                     let span = Span {
-                        text: &self.text,
+                        text: self.text,
                         start: self.position,
                         end: link.start,
                         kind: None,
@@ -314,7 +316,7 @@ impl<'t> Iterator for Spans<'t> {
             None => {
                 if self.position < self.text.len() {
                     let span = Span {
-                        text: &self.text,
+                        text: self.text,
                         start: self.position,
                         end: self.text.len(),
                         kind: None,
@@ -327,7 +329,7 @@ impl<'t> Iterator for Spans<'t> {
         self.links.next().map(|link| {
             self.position = link.end;
             Span {
-                text: &self.text,
+                text: self.text,
                 start: link.start,
                 end: link.end,
                 kind: Some(link.kind),

src/url.rs

@@ -9,7 +9,7 @@ use crate::scanner::Scanner;
 /// The shortest valid URL (without a scheme) might be g.cn (Google China),
 /// which consists of four characters.
 /// We set this as a lower threshold for parsing URLs from plaintext
-/// to avoid false-positives and as a slight performance optimization.
+/// to avoid false positives and as a slight performance optimization.
 /// This threshold might be adjusted in the future.
 const MIN_URL_LENGTH: usize = 4;
 
@@ -146,10 +146,7 @@ fn find_scheme_start(s: &str) -> (Option<usize>, Option<char>) {
 ///
 /// We could make this configurable, but let's keep it simple until someone asks (hi!).
 fn scheme_requires_host(scheme: &str) -> bool {
-    match scheme {
-        "https" | "http" | "ftp" | "ssh" => true,
-        _ => false,
-    }
+    matches!(scheme, "https" | "http" | "ftp" | "ssh")
 }
 
 /// Find the start of a plain domain URL (no scheme), e.g. from `blog.`, start at `g` and end at `b`.
@@ -175,7 +172,7 @@ fn find_domain_start(s: &str, iri_parsing_enabled: bool) -> (Option<usize>, Opti
             // If this was a valid domain, we'd have extracted it already from the previous "."
             '.' => return (None, None),
             '-' => {
-                if first == None {
+                if first.is_none() {
                     // Domain label can't end with `-`
                     return (None, None);
                 } else {