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instant-xml
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Simplify logic for serializing prefixes

This commit is contained in:
Dirkjan Ochtman 2022-11-29 12:14:24 +01:00
parent da536d072f
commit 5bd58698d7
3 changed files with 17 additions and 27 deletions
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6
instant-xml-macros/src/ser.rs
View File

@ -54,7 +54,7 @@ fn serialize_scalar_enum(
) -> Result<(), instant_xml::Error> {
let prefix = match field {
Some(id) => {
let prefix = serializer.write_start(id.name, id.ns, true)?;
let prefix = serializer.write_start(id.name, id.ns)?;
serializer.end_start()?;
Some((prefix, id.name))
}
@ -143,7 +143,7 @@ fn serialize_wrapped_enum(
serializer: &mut instant_xml::Serializer<W>,
) -> Result<(), instant_xml::Error> {
// Start tag
let prefix = serializer.write_start(#tag, #default_namespace, false)?;
let prefix = serializer.write_start(#tag, #default_namespace)?;
debug_assert_eq!(prefix, None);
// Set up element context, this will also emit namespace declarations
@ -234,7 +234,7 @@ fn serialize_struct(
serializer: &mut instant_xml::Serializer<W>,
) -> Result<(), instant_xml::Error> {
// Start tag
let prefix = serializer.write_start(#tag, #default_namespace, false)?;
let prefix = serializer.write_start(#tag, #default_namespace)?;
debug_assert_eq!(prefix, None);
// Set up element context, this will also emit namespace declarations

4
instant-xml/src/impls.rs
View File

@ -69,7 +69,7 @@ where
) -> Result<(), Error> {
let prefix = match field {
Some(id) => {
let prefix = serializer.write_start(id.name, id.ns, true)?;
let prefix = serializer.write_start(id.name, id.ns)?;
serializer.end_start()?;
Some((prefix, id.name))
}
@ -489,7 +489,7 @@ impl ToXml for DateTime<Utc> {
) -> Result<(), Error> {
let prefix = match field {
Some(id) => {
let prefix = serializer.write_start(id.name, id.ns, true)?;
let prefix = serializer.write_start(id.name, id.ns)?;
serializer.end_start()?;
Some((prefix, id.name))
}

34
instant-xml/src/ser.rs
View File

@ -28,35 +28,25 @@ impl<'xml, W: fmt::Write + ?Sized> Serializer<'xml, W> {
}
}
pub fn write_start(
&mut self,
name: &str,
ns: &str,
scalar: bool,
) -> Result<Option<&'static str>, Error> {
pub fn write_start(&mut self, name: &str, ns: &str) -> Result<Option<&'static str>, Error> {
if self.state != State::Element {
return Err(Error::UnexpectedState("invalid state for element start"));
}
let prefix = match ns == self.default_ns {
true => {
let prefix = match (ns == self.default_ns, self.prefixes.get(ns)) {
(true, _) => {
self.output.write_fmt(format_args!("<{name}"))?;
None
}
// In the case of scalars, we can use the prefix instead of setting a
// default namespace (since there are no child elements that will
// expect the default namespace to be set).
false => match (scalar, self.prefixes.get(ns)) {
(false, _) | (true, None) => {
self.output
.write_fmt(format_args!("<{name} xmlns=\"{ns}\""))?;
None
}
(true, Some(&prefix)) => {
self.output.write_fmt(format_args!("<{prefix}:{name}"))?;
Some(prefix)
}
},
(false, Some(prefix)) => {
self.output.write_fmt(format_args!("<{prefix}:{name}"))?;
Some(*prefix)
}
_ => {
self.output
.write_fmt(format_args!("<{name} xmlns=\"{ns}\""))?;
None
}
};
self.state = State::Attribute;