如何正确地对winreg crate中的regvaule类型做出反应？

use winreg::{RegKey, RegValue, RegType};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
    let key = hklm.open_subkey("SOFTWARE\\ExampleKey")?;

    // 假设我们知道值的类型，这里以 REG_SZ 为例
    let (value_name, value) = key.get_value("ExampleValueName")?;
    match value.vtype {
        RegType::REG_SZ => {
            if let Some(s) = value.as_string() {
                println!("The string value is: {}", s);
            }
        },
        RegType::REG_DWORD => {
            if let Some(dw) = value.as_dword() {
                println!("The DWORD value is: {}", dw);
            }
        },
        RegType::REG_QWORD => {
            if let Some(qw) = value.as_qword() {
                println!("The QWORD value is: {}", qw);
            }
        },
        RegType::REG_BINARY => {
            if let Some(bin) = value.as_binary() {
                println!("The binary data is: {:?}", bin);
            }
        },
        _ => println!("Unsupported or unknown type"),
    }

    Ok(())
}