Adapt version:
$ rustc --version
rustc 1.55.0 (c8dfcfe04 2021-09-06)
To overload functions in Rust, "generics" is your friend.
use std::net:: {
IpAddr,
SocketAddr,
};
use socket2:: {
Domain,
Protocol,
Socket,
Type,
};
struct SampleStruct {
ip_address: IpAddr,
port_number: u16,
sample_socket: socket2::Socket,
}
trait SampleTrait<T, O> {
fn new(address:T, port:O) -> SampleStruct;
}
impl SampleTrait<String, u16> for SampleStruct {
fn new(address: String, port: u16) -> Self {
let addr = address.parse::<IpAddr>()
.unwrap_or_else( |_| { panic!("`address` MUST be an IPv4 address (dotted-decimal form) or an IPv6 address.") });
return SampleStruct {
ip_address: addr,
port_number: port,
sample_socket: Socket::new(
if addr.is_ipv4() { Domain::IPV4 } else { Domain::IPV6 },
Type::DGRAM,
Some(Protocol::UDP)
).unwrap()
}
}
}
impl SampleTrait<&str, u16> for SampleStruct {
fn new(address: &str, port: u16) -> Self {
let addr = address.to_string().parse::<IpAddr>()
.unwrap_or_else( |_| { panic!("`address` MUST be an IPv4 address (dotted-decimal form) or an IPv6 address.") });
return SampleStruct {
ip_address: addr,
port_number: port,
sample_socket: Socket::new(
if addr.is_ipv4() { Domain::IPV4 } else { Domain::IPV6 },
Type::DGRAM,
Some(Protocol::UDP)
).unwrap()
}
}
}
impl SampleTrait<IpAddr, u16> for SampleStruct {
fn new(address: IpAddr, port: u16) -> Self {
return SampleStruct {
ip_address: address,
port_number: port,
sample_socket: Socket::new(
if address.is_ipv4() { Domain::IPV4 } else { Domain:: IPV6 },
Type::DGRAM,
Some(Protocol::UDP)
).unwrap()
}
}
}
fn main() {
let foo = SampleStruct::new("127.0.0.1".to_string(), 12345);
println!("IP address = {}, Port = {}", foo.ip_address.to_string(), foo.port_number);
let hoo = SampleStruct::new("127.0.0.1", 12345);
println!("IP address = {}, Port = {}", hoo.ip_address.to_string(), hoo.port_number);
let priv_ip: IpAddr = "192.168.0.1".parse::<IpAddr>().unwrap();
let bar = SampleStruct::new(priv_ip, 12345);
println!("IP address = {}, Port = {}", bar.ip_address.to_string(), bar.port_number);
}
When you run the previous code, you may get the following result.
IP address = 127.0.0.1, Port = 12345
IP address = 127.0.0.1, Port = 12345
IP address = 192.168.0.1, Port = 12345
Top comments (0)