Resolve coercion nodes and dynamic values in the layout pass

node-graph/graph-craft/src/document/value.rs

@@ -263,11 +263,20 @@ macro_rules! tagged_value {
 				}
 			}
 
-			/// `None` for values whose element type is only known dynamically ([`Self::TypeDefault`]).
+			/// `None` for a [`Self::TypeDefault`] whose named type is outside `for_each_type_default!`.
 			pub fn element_write(&self) -> Option<core_types::record::ElementWrite> {
 				Some(match self {
 					Self::None => core_types::record::element_write::<()>(),
-					Self::TypeDefault(_) => return None,
+					Self::TypeDefault(td) => {
+						let name = td.name.as_ref();
+						macro_rules! check {
+							($type_default:ty) => {
+								if name == std::any::type_name::<$type_default>() { return Some(core_types::record::element_write::<$type_default>()); }
+							};
+						}
+						for_each_type_default!(check);
+						return None;
+					}
 					Self::F64Array(_) => core_types::record::element_write::<List<f64>>(),
 					Self::Color(_) => core_types::record::element_write::<List<Color>>(),
 					Self::Gradient(_) => core_types::record::element_write::<List<GradientStops>>(),

node-graph/interpreted-executor/src/node_registry.rs

@@ -179,7 +179,7 @@ mod node_registry_macros {
 			(
 				ProtoNodeIdentifier::new(concat!["graphene_core::ops::IntoNode<", stringify!($to), ">"]),
 				RegistryEntry {
-					layout_meta: None,
+					layout_meta: Some(core_types::record::LayoutMeta::retype(core_types::record::element_write::<$to>())),
 					io: NodeIOTypes::new(
 						concrete!(Context),
 						core_types::registry::record_type::<$to>(),
@@ -247,7 +247,7 @@ mod node_registry_macros {
 			(
 				ProtoNodeIdentifier::new(concat!["graphene_core::ops::ConvertNode<", stringify!($to), ">"]),
 				RegistryEntry {
-					layout_meta: None,
+					layout_meta: Some(core_types::record::LayoutMeta::retype(core_types::record::element_write::<$to>())),
 					io: NodeIOTypes::new(
 						concrete!(Context),
 						core_types::registry::record_type::<$to>(),
@@ -293,7 +293,7 @@ mod node_registry_macros {
 			(
 				ProtoNodeIdentifier::new(concat!["graphene_core::ops::ConvertNode<", stringify!($to), ">"]),
 				RegistryEntry {
-					layout_meta: None,
+					layout_meta: Some(core_types::record::LayoutMeta::retype(core_types::record::element_write::<$to>())),
 					io: NodeIOTypes::new(
 						concrete!(Context),
 						core_types::registry::record_type::<$to>(),

node-graph/libraries/core-types/src/record.rs

@@ -287,6 +287,19 @@ pub enum ElementSpec {
 }
 
 impl LayoutMeta {
+	/// The meta of an elementwise carrier flip that retypes input 0's element,
+	/// preserving its depth and attributes: what an `Into`/`Convert` coercion derives.
+	pub fn retype(element: ElementWrite) -> Self {
+		Self {
+			sources: vec![0],
+			reads: Vec::new(),
+			element: ElementSpec::Concrete(element),
+			writes: Vec::new(),
+			removes: Vec::new(),
+			level_delta: 0,
+		}
+	}
+
 	/// Folds the node's output layout from its inputs', reproducing what the
 	/// node's constructor derives at wiring. `inputs` is indexed by proto-input
 	/// position; [`sources`](LayoutMeta::sources) selects the base layouts, which