fix clippy warnings

src/tools/tshell.rs

@@ -27,7 +27,8 @@ pub fn tshell() -> RuntimeResult<()> {
     let _ast = compiler.lex()?;
     // let mut vm = unsafe { Vm::new(&*(ast.prepare_get_static() as *const StaticData)) };
     let _should_exit = false;
-    let _vm = todo!();
+    let _vm = 0;
+    todo!()
     // let mut function_list = vec![];
     // let mut function_defined_num = 0;
     // 'stop_repl: loop {

stdlib/src/ds/ac.rs

@@ -32,7 +32,8 @@ impl AcAutomaton {
     pub fn add_string(&mut self, addstring: &str) {
         let mut u = 0;
         for i in addstring.chars() {
-            if !self.states[u].next.contains_key(&i) {
+            let condit = !self.states[u].next.contains_key(&i);
+            if condit {
                 self.states.push(State::new());
                 let new_node_id = self.states.len() - 1;
                 self.states[u].next.insert(i, new_node_id);
@@ -48,8 +49,7 @@ impl AcAutomaton {
         for i in self.states.first().unwrap().next.values() {
             q.push(*i);
         }
-        while !q.is_empty() {
-            let u = q.pop().unwrap();
+        while let Some(u) = q.pop() {
             for (c, val) in &self.states[u].next.clone() {
                 // 在这里需要向上找到失配指针
                 // 正常的ac自动机会将剩余的失配部分也指向失配指针
@@ -74,6 +74,12 @@ impl AcAutomaton {
     }
 }
 
+impl Default for AcAutomaton {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

stdlib/src/ds/forward_list.rs

@@ -15,3 +15,9 @@ impl ForwardList {
         self.size() == 0
     }
 }
+
+impl Default for ForwardList {
+    fn default() -> Self {
+        Self::new()
+    }
+}

stdlib/src/ds/hash_map.rs

@@ -5,3 +5,9 @@ impl HashMap {
         HashMap {}
     }
 }
+
+impl Default for HashMap {
+    fn default() -> Self {
+        Self::new()
+    }
+}

stdlib/src/ds/splay.rs

@@ -1,4 +1,3 @@
-
 struct Node {
     sons: [usize; 2],
     cnt: usize,
@@ -37,6 +36,12 @@ impl Splay {
     }
 }
 
+impl Default for Splay {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     #[test]

stdlib/src/ds/st.rs

@@ -5,3 +5,9 @@ impl StTable {
         Self {}
     }
 }
+
+impl Default for StTable {
+    fn default() -> Self {
+        Self::new()
+    }
+}