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Emit layout metadata from the intent IR

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This commit is contained in:
Dennis Kobert
2026-08-13 16:11:58 +00:00
parent 40f99152ce
commit f195e363a5
3 changed files with 60 additions and 45 deletions
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25
node-graph/node-macro/src/codegen.rs
View File

@@ -1743,35 +1743,14 @@ pub(crate) fn generate_node_impl(crate_ident: &CrateIdent, parsed: &ParsedNodeFn
},
};
let layout_meta_fn = format_ident!("{}_layout_meta", fn_name);
let carrier_present = !shape.skips_carrier();
let element_spec = match &shape.element_write {
Some(ty) => quote!(#core_types::record::ElementSpec::Concrete(#core_types::record::element_write::<#ty>())),
None => quote!(#core_types::record::ElementSpec::Carried),
};
let sources = if carrier_present { quote!(::std::vec![0u8]) } else { quote!(::std::vec![]) };
let reads_meta: Vec<TokenStream2> = regular_fields
.iter()
.enumerate()
.filter(|(_, field)| !field.attribute_reads.is_empty())
.map(|(index, field)| {
let descs = field.attribute_reads.iter().map(|read| {
let marker = &read.marker;
quote!(#core_types::record::FieldWrite::of::<#marker>(0))
});
let index = index as u8;
quote!(#core_types::record::InputReads { input: #index, reads: ::std::vec![#(#descs),*] })
})
.collect();
let layout_meta = crate::codegen::ir::layout_meta_tokens(&crate::codegen::ir::build(parsed), element_spec, core_types);
let layout_meta_def = quote! {
#vis fn #layout_meta_fn() -> #core_types::record::LayoutMeta {
#core_types::record::LayoutMeta {
sources: #sources,
reads: ::std::vec![#(#reads_meta),*],
element: #element_spec,
writes: ::std::vec![#(#write_descs),*],
removes: ::std::vec![#(#remove_pairs),*],
level_delta: 0,
}
#layout_meta
}
};
let reading_secondaries = reading_secondary_indices(&regular_fields, shape);

32
node-graph/node-macro/src/codegen/entries.rs
View File

@@ -54,8 +54,8 @@ fn flip_entries_tokens(parsed: &ParsedNodeFn, struct_name: &Ident, regular_field
let arity = regular_fields.len();
let names: Vec<&Ident> = regular_fields.iter().map(|field| &field.pat_ident.ident).collect();
let node_underscores: Vec<TokenStream2> = regular_fields.iter().map(|_| quote!(_)).collect();
let carrier_present = flip_carrier(parsed);
let sources = if carrier_present { quote!(::std::vec![0u8]) } else { quote!(::std::vec![]) };
let node = crate::codegen::ir::build(parsed);
let core_types = quote!(gcore);
// Shorthand associated types in the output only resolve against the
// generics' bounds, so rows name the output through a bounded alias. Only
@@ -142,16 +142,11 @@ fn flip_entries_tokens(parsed: &ParsedNodeFn, struct_name: &Ident, regular_field
let layout = format_ident!("__layout_{index}");
quote!(&#layout,)
});
let element_spec = quote!(gcore::record::ElementSpec::Concrete(gcore::record::element_write::<#row_output>()));
let layout_meta = crate::codegen::ir::layout_meta_tokens(&node, element_spec, &core_types);
Some(quote! {
gcore::registry::RegistryEntry {
layout_meta: Some(gcore::record::LayoutMeta {
sources: #sources,
reads: ::std::vec::Vec::new(),
element: gcore::record::ElementSpec::Concrete(gcore::record::element_write::<#row_output>()),
writes: ::std::vec::Vec::new(),
removes: ::std::vec::Vec::new(),
level_delta: 0,
}),
layout_meta: Some(#layout_meta),
io: gcore::registry::NodeIOTypes::new(
gcore::concrete!(gcore::context::ContextImpl<'static>),
gcore::registry::record_type::<#row_output>(),
@@ -325,18 +320,11 @@ fn single_row_entries(parsed: &ParsedNodeFn, class: &Class, struct_name: &Ident,
quote!(&#layout,)
});
let carried_meta = |sources: &[usize]| {
let sources = sources.iter().map(|index| *index as u8);
quote! {
Some(gcore::record::LayoutMeta {
sources: ::std::vec![#(#sources),*],
reads: ::std::vec::Vec::new(),
element: gcore::record::ElementSpec::Carried,
writes: ::std::vec::Vec::new(),
removes: ::std::vec::Vec::new(),
level_delta: 0,
})
}
let node = crate::codegen::ir::build(parsed);
let core_types = quote!(gcore);
let carried_meta = |_sources: &[usize]| {
let meta = crate::codegen::ir::layout_meta_tokens(&node, quote!(gcore::record::ElementSpec::Carried), &core_types);
quote!(Some(#meta))
};
let (io_output, wrap, prelude, new_layout_args, layout_meta) = match class {

48
node-graph/node-macro/src/codegen/ir.rs
View File

@@ -6,6 +6,8 @@ use crate::codegen::classify::{
};
use crate::codegen::entries::implementation_rows;
use crate::parsing::{AttributeRead, NodeParsedField, ParsedField, ParsedFieldType, ParsedNodeFn, RecordWrites, RegularParsedField, record_writes};
use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
use syn::{GenericArgument, GenericParam, Ident, PathArguments, Type, TypeParamBound};
pub(crate) fn build(parsed: &ParsedNodeFn) -> Node {
@@ -165,6 +167,52 @@ fn ilist_inner(ty: &Type) -> Option<Type> {
})
}
/// Emits the `LayoutMeta` literal from the IR. `element_spec` is supplied by the
/// caller since it is the one row-dependent facet; the rest folds from the node.
pub(crate) fn layout_meta_tokens(node: &Node, element_spec: TokenStream2, core_types: &TokenStream2) -> TokenStream2 {
let sources = node.inputs.iter().enumerate().filter(|(_, input)| input.subject).map(|(index, _)| index as u8);
let reads = node.inputs.iter().enumerate().filter_map(|(index, input)| {
(!input.shape.attrs.is_empty()).then(|| {
let descs = field_writes(&input.shape.attrs, core_types);
let index = index as u8;
quote!(#core_types::record::InputReads { input: #index, reads: ::std::vec![#(#descs),*] })
})
});
let writes = field_writes(&node.output.shape.attrs, core_types);
let removes = node.output.removes.iter().map(|attr| {
let marker = &attr.marker;
let level = attr.level;
quote!((<#marker as #core_types::attribute::Attribute>::NAME, #level))
});
let level_delta = level_delta(node);
quote! {
#core_types::record::LayoutMeta {
sources: ::std::vec![#(#sources),*],
reads: ::std::vec![#(#reads),*],
element: #element_spec,
writes: ::std::vec![#(#writes),*],
removes: ::std::vec![#(#removes),*],
level_delta: #level_delta,
}
}
}
fn field_writes(attrs: &[LevelAttr], core_types: &TokenStream2) -> Vec<TokenStream2> {
attrs
.iter()
.map(|attr| {
let marker = &attr.marker;
let level = attr.level;
quote!(#core_types::record::FieldWrite::of::<#marker>(#level))
})
.collect()
}
fn level_delta(node: &Node) -> i8 {
let subject_depth = node.inputs.iter().find(|input| input.subject).map_or(0, |input| input.shape.depth as i8);
node.output.shape.depth as i8 - subject_depth
}
pub(crate) struct Node {
pub(crate) kernel: Kernel,
pub(crate) generics: Vec<Generic>,