Fix clippy warnings

src/busy.rs

@@ -58,11 +58,7 @@ impl Connection {
     pub fn busy_handler(&self, callback: Option<fn(i32) -> bool>) -> Result<()> {
         unsafe extern "C" fn busy_handler_callback(p_arg: *mut c_void, count: c_int) -> c_int {
             let handler_fn: fn(i32) -> bool = mem::transmute(p_arg);
-            if let Ok(true) = catch_unwind(|| handler_fn(count)) {
-                1
-            } else {
-                0
-            }
+            c_int::from(catch_unwind(|| handler_fn(count)).unwrap_or_default())
         }
         let c = self.db.borrow_mut();
         let r = match callback {

src/column.rs

@@ -33,7 +33,7 @@ impl Statement<'_> {
     /// calling this method.
     pub fn column_names(&self) -> Vec<&str> {
         let n = self.column_count();
-        let mut cols = Vec::with_capacity(n as usize);
+        let mut cols = Vec::with_capacity(n);
         for i in 0..n {
             let s = self.column_name_unwrap(i);
             cols.push(s);
@@ -95,7 +95,7 @@ impl Statement<'_> {
     pub fn column_name(&self, col: usize) -> Result<&str> {
         self.stmt
             .column_name(col)
-            .ok_or(Error::InvalidColumnIndex(col))
+            .ok_or_else(|| Error::InvalidColumnIndex(col))
             .map(|slice| {
                 str::from_utf8(slice.to_bytes()).expect("Invalid UTF-8 sequence in column name")
             })
@@ -137,7 +137,7 @@ impl Statement<'_> {
     #[cfg_attr(docsrs, doc(cfg(feature = "column_decltype")))]
     pub fn columns(&self) -> Vec<Column> {
         let n = self.column_count();
-        let mut cols = Vec::with_capacity(n as usize);
+        let mut cols = Vec::with_capacity(n);
         for i in 0..n {
             let name = self.column_name_unwrap(i);
             let slice = self.stmt.column_decltype(i);

src/hooks.rs

@@ -426,11 +426,7 @@ impl InnerConnection {
                 let boxed_hook: *mut F = p_arg.cast::<F>();
                 (*boxed_hook)()
             });
-            if let Ok(true) = r {
-                1
-            } else {
-                0
-            }
+            c_int::from(r.unwrap_or_default())
         }
 
         // unlike `sqlite3_create_function_v2`, we cannot specify a `xDestroy` with
@@ -568,11 +564,7 @@ impl InnerConnection {
                 let boxed_handler: *mut F = p_arg.cast::<F>();
                 (*boxed_handler)()
             });
-            if let Ok(true) = r {
-                1
-            } else {
-                0
-            }
+            c_int::from(r.unwrap_or_default())
         }
 
         if let Some(handler) = handler {

src/limits.rs

@@ -71,55 +71,49 @@ mod test {
 
     #[test]
     fn test_limit_values() {
-        assert_eq!(
-            Limit::SQLITE_LIMIT_LENGTH as i32,
-            ffi::SQLITE_LIMIT_LENGTH as i32,
-        );
+        assert_eq!(Limit::SQLITE_LIMIT_LENGTH as i32, ffi::SQLITE_LIMIT_LENGTH,);
         assert_eq!(
             Limit::SQLITE_LIMIT_SQL_LENGTH as i32,
-            ffi::SQLITE_LIMIT_SQL_LENGTH as i32,
-        );
-        assert_eq!(
-            Limit::SQLITE_LIMIT_COLUMN as i32,
-            ffi::SQLITE_LIMIT_COLUMN as i32,
+            ffi::SQLITE_LIMIT_SQL_LENGTH,
         );
+        assert_eq!(Limit::SQLITE_LIMIT_COLUMN as i32, ffi::SQLITE_LIMIT_COLUMN,);
         assert_eq!(
             Limit::SQLITE_LIMIT_EXPR_DEPTH as i32,
-            ffi::SQLITE_LIMIT_EXPR_DEPTH as i32,
+            ffi::SQLITE_LIMIT_EXPR_DEPTH,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_COMPOUND_SELECT as i32,
-            ffi::SQLITE_LIMIT_COMPOUND_SELECT as i32,
+            ffi::SQLITE_LIMIT_COMPOUND_SELECT,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_VDBE_OP as i32,
-            ffi::SQLITE_LIMIT_VDBE_OP as i32,
+            ffi::SQLITE_LIMIT_VDBE_OP,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_FUNCTION_ARG as i32,
-            ffi::SQLITE_LIMIT_FUNCTION_ARG as i32,
+            ffi::SQLITE_LIMIT_FUNCTION_ARG,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_ATTACHED as i32,
-            ffi::SQLITE_LIMIT_ATTACHED as i32,
+            ffi::SQLITE_LIMIT_ATTACHED,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_LIKE_PATTERN_LENGTH as i32,
-            ffi::SQLITE_LIMIT_LIKE_PATTERN_LENGTH as i32,
+            ffi::SQLITE_LIMIT_LIKE_PATTERN_LENGTH,
         );
         assert_eq!(
             Limit::SQLITE_LIMIT_VARIABLE_NUMBER as i32,
-            ffi::SQLITE_LIMIT_VARIABLE_NUMBER as i32,
+            ffi::SQLITE_LIMIT_VARIABLE_NUMBER,
         );
         #[cfg(feature = "bundled")]
         assert_eq!(
             Limit::SQLITE_LIMIT_TRIGGER_DEPTH as i32,
-            ffi::SQLITE_LIMIT_TRIGGER_DEPTH as i32,
+            ffi::SQLITE_LIMIT_TRIGGER_DEPTH,
         );
         #[cfg(feature = "bundled")]
         assert_eq!(
             Limit::SQLITE_LIMIT_WORKER_THREADS as i32,
-            ffi::SQLITE_LIMIT_WORKER_THREADS as i32,
+            ffi::SQLITE_LIMIT_WORKER_THREADS,
         );
     }
 

src/vtab/series.rs

@@ -115,6 +115,7 @@ unsafe impl<'vtab> VTab<'vtab> for SeriesTab {
         }
         if idx_num.contains(QueryPlanFlags::BOTH) {
             // Both start= and stop= boundaries are available.
+            #[allow(clippy::bool_to_int_with_if)]
             info.set_estimated_cost(f64::from(
                 2 - if idx_num.contains(QueryPlanFlags::STEP) {
                     1

src/vtab/vtablog.rs

@@ -163,7 +163,7 @@ impl<'vtab> UpdateVTab<'vtab> for VTabLog {
             self.i_inst,
             args.iter().collect::<Vec<ValueRef<'_>>>()
         );
-        Ok(self.n_row as i64)
+        Ok(self.n_row)
     }
 
     fn update(&mut self, args: &Values<'_>) -> Result<()> {