notable restructuring

examples/parse_vcd.rs

@@ -0,0 +1,29 @@
+use clap::Parser;
+use std::fs::File;
+
+use fastwave::*;
+
+use num::{BigUint};
+
+#[derive(Parser)]
+struct Cli {
+    /// The path to the file to read
+    #[clap(parse(from_os_str))]
+    path: std::path::PathBuf,
+}
+
+fn main() -> std::io::Result<()> {
+    let args = Cli::parse();
+
+    use std::time::Instant;
+    
+    let now = Instant::now();
+    let file = File::open(&args.path)?;
+    let vcd = parse_vcd(file).unwrap();
+    let elapsed = now.elapsed();
+
+    println!("Parsed VCD file {} : {:.2?}", &args.path.as_os_str().to_str().unwrap(), elapsed);
+
+
+    Ok(())
+}