refactor: simplify lifetime annotations

jieba-macros/src/lib.rs

@@ -7,8 +7,10 @@ pub fn generate_hmm_data(_input: TokenStream) -> TokenStream {
     let mut lines = hmm_data.lines().skip_while(|x| x.starts_with('#'));
 
     // Initial probabilities
-    let init_probs = lines.next().expect("Failed to read initial probabilities from hmm.model");
-
+    let init_probs = lines
+        .next()
+        .expect("Failed to read initial probabilities from hmm.model");
+
     output.push_str("#[allow(clippy::style)]\n");
     output.push_str("pub static INITIAL_PROBS: [f64; 4] = [");
     output.push_str(&init_probs.replace(' ', ", "));

src/hmm.rs

@@ -13,8 +13,6 @@ lazy_static! {
 
 pub const NUM_STATES: usize = 4;
 
-pub type StateSet = [f64; NUM_STATES];
-
 /// Result of hmm is a labeling of each Unicode Scalar Value in the input
 /// string with Begin, Middle, End, or Single. These denote the proposed
 /// segments. A segment is one of the following two patterns.

src/lib.rs

@@ -144,7 +144,7 @@ impl<'t> SplitState<'t> {
     }
 }
 
-impl<'r, 't> Iterator for SplitMatches<'r, 't> {
+impl<'t> Iterator for SplitMatches<'_, 't> {
     type Item = SplitState<'t>;
 
     fn next(&mut self) -> Option<SplitState<'t>> {
@@ -768,7 +768,7 @@ impl Jieba {
     /// `sentence`: input text
     ///
     /// `hmm`: enable HMM or not
-    pub fn tag<'a>(&'a self, sentence: &'a str, hmm: bool) -> Vec<Tag> {
+    pub fn tag<'a>(&'a self, sentence: &'a str, hmm: bool) -> Vec<Tag<'a>> {
         let words = self.cut(sentence, hmm);
         words
             .into_iter()

src/sparse_dag.rs

@@ -12,7 +12,7 @@ pub struct EdgeIter<'a> {
     cursor: usize,
 }
 
-impl<'a> Iterator for EdgeIter<'a> {
+impl Iterator for EdgeIter<'_> {
     type Item = usize;
 
     fn size_hint(&self) -> (usize, Option<usize>) {