Implement clippy hint.

examples/parse_folder.rs

@@ -14,7 +14,7 @@ extern crate log;
 use clap::{App, Arg};
 
 use rustpython_parser::{ast, parser};
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::time::{Duration, Instant};
 
 fn main() {
@@ -77,8 +77,8 @@ fn parse_python_file(filename: &Path) -> ParsedFile {
     info!("Parsing file {:?}", filename);
     match std::fs::read_to_string(filename) {
         Err(e) => ParsedFile {
-            filename: Box::new(filename.to_path_buf()),
-            code: "".to_string(),
+            // filename: Box::new(filename.to_path_buf()),
+            // code: "".to_string(),
             num_lines: 0,
             result: Err(e.to_string()),
         },
@@ -86,8 +86,8 @@ fn parse_python_file(filename: &Path) -> ParsedFile {
             let num_lines = source.to_string().lines().count();
             let result = parser::parse_program(&source).map_err(|e| e.to_string());
             ParsedFile {
-                filename: Box::new(filename.to_path_buf()),
-                code: source.to_string(),
+                // filename: Box::new(filename.to_path_buf()),
+                // code: source.to_string(),
                 num_lines,
                 result,
             }
@@ -140,8 +140,8 @@ struct ScanResult {
 }
 
 struct ParsedFile {
-    filename: Box<PathBuf>,
-    code: String,
+    // filename: Box<PathBuf>,
+    // code: String,
     num_lines: usize,
     result: ParseResult,
 }

parser/src/lexer.rs

@@ -416,7 +416,7 @@ where
         loop {
             if let Some(c) = self.take_number(radix) {
                 value_text.push(c);
-            } else if self.chr0 == Some('_') && Lexer::<T>::is_digit_of_radix(&self.chr1, radix) {
+            } else if self.chr0 == Some('_') && Lexer::<T>::is_digit_of_radix(self.chr1, radix) {
                 self.next_char();
             } else {
                 break;
@@ -427,7 +427,7 @@ where
 
     /// Consume a single character with the given radix.
     fn take_number(&mut self, radix: u32) -> Option<char> {
-        let take_char = Lexer::<T>::is_digit_of_radix(&self.chr0, radix);
+        let take_char = Lexer::<T>::is_digit_of_radix(self.chr0, radix);
 
         if take_char {
             Some(self.next_char().unwrap())
@@ -437,7 +437,7 @@ where
     }
 
     /// Test if a digit is of a certain radix.
-    fn is_digit_of_radix(c: &Option<char>, radix: u32) -> bool {
+    fn is_digit_of_radix(c: Option<char>, radix: u32) -> bool {
         match radix {
             2 => match c {
                 Some('0'..='1') => true,