Fix elided_lifetimes_in_paths warnings

Author: mlafeldt

crates/duckdb/src/lib.rs

@@ -207,7 +207,7 @@ pub enum DatabaseName<'a> {
 
 #[allow(clippy::needless_lifetimes)]
 impl<'a> fmt::Display for DatabaseName<'a> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             DatabaseName::Main => write!(f, "main"),
             DatabaseName::Temp => write!(f, "temp"),

crates/duckdb/src/test_all_types.rs

@@ -51,7 +51,7 @@ fn test_with_database(database: &Connection) -> crate::Result<()> {
     Ok(())
 }
 
-fn test_single(idx: &mut i32, column: String, value: ValueRef) {
+fn test_single(idx: &mut i32, column: String, value: ValueRef<'_>) {
     match column.as_str() {
         "bool" => match idx {
             0 => assert_eq!(value, ValueRef::Boolean(false)),

crates/duckdb/src/types/to_sql.rs

@@ -232,10 +232,10 @@ mod test {
     fn test_cow_str() {
         use std::borrow::Cow;
         let s = "str";
-        let cow: Cow<str> = Cow::Borrowed(s);
+        let cow: Cow<'_, str> = Cow::Borrowed(s);
         let r = cow.to_sql();
         assert!(r.is_ok());
-        let cow: Cow<str> = Cow::Owned::<str>(String::from(s));
+        let cow: Cow<'_, str> = Cow::Owned(String::from(s));
         let r = cow.to_sql();
         assert!(r.is_ok());
         // Ensure this compiles.

crates/duckdb/src/vtab/value.rs

@@ -33,7 +33,7 @@ impl Value {
 }
 
 impl fmt::Display for Value {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let c_string = unsafe { CString::from_raw(duckdb_get_varchar(self.ptr)) };
         write!(f, "{}", c_string.to_str().unwrap())
     }