make symbols optional

src/args.rs

@@ -5,6 +5,8 @@ pub struct Args {
     #[arg(short, default_value_t = 16)]
     pub length: usize,
     #[arg(short)]
+    pub symbols: bool,
+    #[arg(short)]
     pub write_to_file: bool,
     #[arg(short, default_value_t = String::from("generated_pwd.txt"))]
     pub file: String,

src/randomstring.rs

@@ -1,5 +1,5 @@
 use clap::Parser;
-use rand::Rng;
+use rand::{distributions::Alphanumeric, Rng};
 use std::iter;
 
 use crate::Args;
@@ -15,8 +15,16 @@ impl RandomString {
         let mut rng = rand::thread_rng();
         let char = || CHARSET[rng.gen_range(0..CHARSET.len())] as char;
 
-        let s: String = iter::repeat_with(char).take(args.length).collect();
-
-        s
+        if args.symbols {
+            let s: String = iter::repeat_with(char).take(args.length).collect();
+            s
+        } else {
+            let s: String = rng
+                .sample_iter(&Alphanumeric)
+                .take(args.length)
+                .map(char::from)
+                .collect();
+            s
+        }
     }
 }