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xso: reject duplicate children

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This was an oversight. Even though we apparently don't have tests for
this anywhere, it is what the old functional macros do.
This commit is contained in:
Jonas Schäfer 2024-08-03 13:28:07 +02:00 • committed by Link Mauve
commit 6440209f95
5 changed files with 92 additions and 1 deletions
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13
xso-proc/src/field.rs
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@ -393,6 +393,8 @@ impl FieldDef {
AmountConstraint::FixedSingle(_) => {
let missing_msg =
error_message::on_missing_child(container_name, &self.member);
let duplicate_msg =
error_message::on_duplicate_child(container_name, &self.member);
let on_absent = match default_ {
Flag::Absent => quote! {
@ -411,7 +413,16 @@ impl FieldDef {
init: quote! { ::std::option::Option::None },
ty: option_ty(self.ty.clone()),
},
matcher,
matcher: quote! {
match #matcher {
::core::result::Result::Ok(v) => if #field_access.is_some() {
::core::result::Result::Err(::xso::error::FromEventsError::Invalid(::xso::error::Error::Other(#duplicate_msg)))
} else {
::core::result::Result::Ok(v)
},
::core::result::Result::Err(e) => ::core::result::Result::Err(e),
}
},
builder,
collect: quote! {
#field_access = ::std::option::Option::Some(#substate_result);