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xso: add support for post-deserialization callback

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This commit is contained in:
Jonas Schäfer 2025-04-05 13:38:05 +02:00
commit 8e81c41f59
8 changed files with 193 additions and 1 deletions
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12
xso-proc/src/enums.rs
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@ -50,6 +50,7 @@ impl NameVariant {
on_unknown_child,
transparent,
discard,
deserialize_callback,
} = XmlCompoundMeta::parse_from_attributes(&decl.attrs)?;
reject_key!(debug flag not on "enum variants" only on "enums and structs");
@ -58,6 +59,7 @@ impl NameVariant {
reject_key!(builder not on "enum variants" only on "enums and structs");
reject_key!(iterator not on "enum variants" only on "enums and structs");
reject_key!(transparent flag not on "named enum variants" only on "structs");
reject_key!(deserialize_callback not on "enum variants" only on "enums and structs");
let Some(name) = name else {
return Err(Error::new(meta_span, "`name` is required on enum variants"));
@ -278,12 +280,14 @@ impl DynamicVariant {
on_unknown_child: _, // used by StructInner
transparent: _, // used by StructInner
discard: _, // used by StructInner
ref deserialize_callback,
} = meta;
reject_key!(debug flag not on "enum variants" only on "enums and structs");
reject_key!(exhaustive flag not on "enum variants" only on "enums");
reject_key!(builder not on "enum variants" only on "enums and structs");
reject_key!(iterator not on "enum variants" only on "enums and structs");
reject_key!(deserialize_callback not on "enum variants" only on "enums and structs");
let inner = StructInner::new(meta, &variant.fields)?;
Ok(Self { ident, inner })
@ -395,6 +399,7 @@ impl EnumInner {
on_unknown_child,
transparent,
discard,
deserialize_callback,
} = meta;
// These must've been cleared by the caller. Because these being set
@ -403,6 +408,7 @@ impl EnumInner {
assert!(builder.is_none());
assert!(iterator.is_none());
assert!(!debug.is_set());
assert!(deserialize_callback.is_none());
reject_key!(name not on "enums" only on "their variants");
reject_key!(transparent flag not on "enums" only on "structs");
@ -476,6 +482,9 @@ pub(crate) struct EnumDef {
/// Flag whether debug mode is enabled.
debug: bool,
/// Optional validator function to call.
deserialize_callback: Option<Path>,
}
impl EnumDef {
@ -496,6 +505,7 @@ impl EnumDef {
};
let debug = meta.debug.take().is_set();
let deserialize_callback = meta.deserialize_callback.take();
Ok(Self {
inner: EnumInner::new(meta, variant_iter)?,
@ -503,6 +513,7 @@ impl EnumDef {
builder_ty_ident,
item_iter_ty_ident,
debug,
deserialize_callback,
})
}
}
@ -530,6 +541,7 @@ impl ItemDef for EnumDef {
path: target_ty_ident.clone().into(),
}
.into(),
self.deserialize_callback.as_ref(),
)?;
Ok(FromXmlParts {