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Visitor for types that parse from a string

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This commit is contained in:
David Tolnay 2018-06-03 01:19:46 -07:00
parent 3e57cd5917
commit 485a64aaf9
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GPG Key ID: F9BA143B95FF6D82
1 changed files with 78 additions and 14 deletions
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92
serde/src/de/impls.rs
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@ -1182,15 +1182,31 @@ map_impl!(
#[cfg(feature = "std")]
macro_rules! parse_ip_impl {
($ty:ty; $size:expr) => {
($expecting:tt $ty:ty; $size:tt) => {
impl<'de> Deserialize<'de> for $ty {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
let s = try!(String::deserialize(deserializer));
s.parse().map_err(Error::custom)
struct IpAddrVisitor;
impl<'de> Visitor<'de> for IpAddrVisitor {
type Value = $ty;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str($expecting)
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: Error,
{
s.parse().map_err(Error::custom)
}
}
deserializer.deserialize_str(IpAddrVisitor)
} else {
<[u8; $size]>::deserialize(deserializer).map(<$ty>::from)
}
@ -1318,8 +1334,24 @@ impl<'de> Deserialize<'de> for net::IpAddr {
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
let s = try!(String::deserialize(deserializer));
s.parse().map_err(Error::custom)
struct IpAddrVisitor;
impl<'de> Visitor<'de> for IpAddrVisitor {
type Value = net::IpAddr;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("IP address")
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: Error,
{
s.parse().map_err(Error::custom)
}
}
deserializer.deserialize_str(IpAddrVisitor)
} else {
use lib::net::IpAddr;
deserialize_enum!{
@ -1332,22 +1364,38 @@ impl<'de> Deserialize<'de> for net::IpAddr {
}
#[cfg(feature = "std")]
parse_ip_impl!(net::Ipv4Addr; 4);
parse_ip_impl!("IPv4 address" net::Ipv4Addr; 4);
#[cfg(feature = "std")]
parse_ip_impl!(net::Ipv6Addr; 16);
parse_ip_impl!("IPv6 address" net::Ipv6Addr; 16);
#[cfg(feature = "std")]
macro_rules! parse_socket_impl {
($ty:ty, $new:expr) => {
($expecting:tt $ty:ty, $new:expr) => {
impl<'de> Deserialize<'de> for $ty {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
let s = try!(String::deserialize(deserializer));
s.parse().map_err(Error::custom)
struct SocketAddrVisitor;
impl<'de> Visitor<'de> for SocketAddrVisitor {
type Value = $ty;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str($expecting)
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: Error,
{
s.parse().map_err(Error::custom)
}
}
deserializer.deserialize_str(SocketAddrVisitor)
} else {
<(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port))
}
@ -1363,8 +1411,24 @@ impl<'de> Deserialize<'de> for net::SocketAddr {
D: Deserializer<'de>,
{
if deserializer.is_human_readable() {
let s = try!(String::deserialize(deserializer));
s.parse().map_err(Error::custom)
struct SocketAddrVisitor;
impl<'de> Visitor<'de> for SocketAddrVisitor {
type Value = net::SocketAddr;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("socket address")
}
fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
where
E: Error,
{
s.parse().map_err(Error::custom)
}
}
deserializer.deserialize_str(SocketAddrVisitor)
} else {
use lib::net::SocketAddr;
deserialize_enum!{
@ -1377,10 +1441,10 @@ impl<'de> Deserialize<'de> for net::SocketAddr {
}
#[cfg(feature = "std")]
parse_socket_impl!(net::SocketAddrV4, net::SocketAddrV4::new);
parse_socket_impl!("IPv4 socket address" net::SocketAddrV4, net::SocketAddrV4::new);
#[cfg(feature = "std")]
parse_socket_impl!(net::SocketAddrV6, |ip, port| net::SocketAddrV6::new(
parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |ip, port| net::SocketAddrV6::new(
ip, port, 0, 0
));