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Flip lend-parameter nodes onto record wires and keep the clone adapter plain

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This commit is contained in:
Dennis Kobert
2026-08-05 22:57:51 +00:00
parent 3eecc31bfd
commit c20a243fc2
4 changed files with 43 additions and 14 deletions
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25
node-graph/node-macro/src/codegen.rs
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@@ -787,7 +787,7 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
}
})
});
let introduced_lend_lifetime = (has_lend && declared_arena_lifetime.is_none()).then(|| Lifetime::new("'__lend", proc_macro2::Span::call_site()));
let introduced_lend_lifetime = (has_lend && !flip && declared_arena_lifetime.is_none()).then(|| Lifetime::new("'__lend", proc_macro2::Span::call_site()));
let lend_lifetime = declared_arena_lifetime.or_else(|| introduced_lend_lifetime.clone());
if let Some(lifetime) = &introduced_lend_lifetime {
ctx_bounds.push(quote!(#core_types::context::ExtractArena<ArenaRef = &#lifetime #core_types::arena::Arena>));
@@ -961,6 +961,7 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
let record_value_ty: Type = syn::parse_quote!(#core_types::record::RecordValue<'__record>);
let node_bounds = regular_fields.iter().enumerate().zip(&node_generics).map(|((index, field), node_generic)| match &field.ty {
ParsedFieldType::Regular(_) if flip => quote!(#node_generic: #core_types::node::Node<#ctx_ident, Output = #record_value_ty>),
ParsedFieldType::Regular(RegularParsedField { ty, lend: Some(_), .. }) => {
let lifetime = lend_lifetime.as_ref().expect("lend fields imply the lend lifetime");
quote!(#node_generic: #core_types::node::Node<#ctx_ident, Output = &#lifetime #ty>)
@@ -971,7 +972,6 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
ParsedFieldType::Regular(RegularParsedField { ty, .. }) if routing_source(ty) => {
quote!(#node_generic: #core_types::node::Node<#ctx_ident, Output = #record_value_ty>)
}
ParsedFieldType::Regular(_) if flip => quote!(#node_generic: #core_types::node::Node<#ctx_ident, Output = #record_value_ty>),
ParsedFieldType::Regular(RegularParsedField { ty, .. }) => quote!(#node_generic: #core_types::node::Node<#ctx_ident, Output = #ty>),
ParsedFieldType::Node(NodeParsedField { output_type, .. }) if routing_source(output_type) => match derives {
true => quote!(#node_generic: for<'__derived> #core_types::record::DerivedRecordEdge<'__derived, #core_types::context::Derived<'__derived, #ctx_ident>>),
@@ -989,7 +989,7 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
let mut lend_outlives: Vec<TokenStream2> = regular_fields
.iter()
.filter_map(|field| match &field.ty {
ParsedFieldType::Regular(RegularParsedField { ty, lend: Some(_), .. }) => {
ParsedFieldType::Regular(RegularParsedField { ty, lend: Some(_), .. }) if !flip => {
let lifetime = lend_lifetime.as_ref().expect("lend fields imply the lend lifetime");
Some(quote!(#ty: #lifetime))
}
@@ -1037,6 +1037,17 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
let name = &field.pat_ident.ident;
match &field.ty {
ParsedFieldType::Regular(_) if record.is_some() && !skips_carrier && index == 0 => quote!(),
ParsedFieldType::Regular(RegularParsedField { ty, lend: Some(_), .. }) if flip => {
let slot = format_ident!("__in_{index}");
let record_local = format_ident!("__record_{index}");
quote! {
let #record_local = match __cell.eval_input(#index, &self.#name, __input) {
Ok(value) => value,
Err(interrupt) => return interrupt.into(),
};
let #name: &#ty = unsafe { #core_types::record::borrow_element(self.#slot.rec(&#record_local)) };
}
}
ParsedFieldType::Regular(RegularParsedField { ty, .. }) if flip => {
let slot = format_ident!("__in_{index}");
quote! {
@@ -1436,6 +1447,7 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
let mut bounds: Vec<TokenStream2> = regular_fields
.iter()
.filter_map(|field| match &field.ty {
ParsedFieldType::Regular(RegularParsedField { lend: Some(_), .. }) => None,
ParsedFieldType::Regular(RegularParsedField { ty, .. }) => Some(quote!(#ty: ::core::clone::Clone)),
_ => None,
})
@@ -1813,7 +1825,7 @@ pub(crate) fn record_flip(parsed: &ParsedNodeFn) -> bool {
if parsed.is_async || is_source_kernel(&parsed.output_type) {
return false;
}
if parsed.attributes.batch.is_some() || parsed.attributes.shader_node.is_some() {
if parsed.attributes.batch.is_some() || parsed.attributes.shader_node.is_some() || parsed.attributes.plain {
return false;
}
if matches!(kernel_kind(&parsed.output_type), KernelKind::Poll(_)) {
@@ -1842,10 +1854,7 @@ pub(crate) fn record_flip(parsed: &ParsedNodeFn) -> bool {
GenericParam::Lifetime(_) | GenericParam::Const(_) => return false,
}
}
parsed.fields.iter().all(|field| match &field.ty {
ParsedFieldType::Regular(RegularParsedField { lend, .. }) => lend.is_none(),
ParsedFieldType::Node(_) => false,
})
parsed.fields.iter().all(|field| matches!(&field.ty, ParsedFieldType::Regular(_)))
}
pub(crate) fn routing_io(parsed: &ParsedNodeFn) -> Option<RoutingIo> {