Fixed typing and broadcasting issue for sequence types

backend/src/events.py

@@ -5,7 +5,7 @@
 from dataclasses import dataclass
 from typing import Dict, Literal, TypedDict, Union
 
-from api import ErrorValue, InputId, NodeId, OutputId
+from api import ErrorValue, InputId, IterOutputId, NodeId, OutputId
 
 # General events
 
@@ -89,7 +89,7 @@ class NodeBroadcastData(TypedDict):
     nodeId: NodeId
     data: dict[OutputId, object]
     types: dict[OutputId, object]
-    expectedLength: int | None
+    sequenceTypes: dict[IterOutputId, object] | None
 
 
 class NodeBroadcastEvent(TypedDict):

backend/src/packages/chaiNNer_standard/image/batch_processing/load_images.py

@@ -94,10 +94,7 @@ def list_glob(directory: Path, globexpr: str, ext_filter: list[str]) -> list[Pat
         DirectoryOutput("Directory", output_type="Input0"),
         TextOutput("Subdirectory Path"),
         TextOutput("Name"),
-        NumberOutput(
-            "Index",
-            output_type="if Input4 { min(uint, Input5 - 1) } else { uint }",
-        ),
+        NumberOutput("Index", output_type="min(uint, max(0, IterOutput0.length - 1))"),
     ],
     iterator_outputs=IteratorOutputInfo(
         outputs=[0, 2, 3, 4],

backend/src/packages/chaiNNer_standard/image/video_frames/load_video.py

@@ -46,8 +46,8 @@
     outputs=[
         ImageOutput("Frame", channels=3),
         NumberOutput(
-            "Frame Index",
-            output_type="if Input1 { min(uint, Input2 - 1) } else { uint }",
+            "Index",
+            output_type="min(uint, max(0, IterOutput0.length - 1))",
         ).with_docs("A counter that starts at 0 and increments by 1 for each frame."),
         DirectoryOutput("Video Directory", of_input=0),
         FileNameOutput("Name", of_input=0),
@@ -58,6 +58,7 @@
         outputs=[0, 1], length_type="if Input1 { min(uint, Input2) } else { uint }"
     ),
     node_context=True,
+    side_effects=True,
     kind="generator",
 )
 def load_video_node(

backend/src/process.py

@@ -13,13 +13,16 @@
 
 from sanic.log import logger
 
+import navi
 from api import (
     BaseInput,
     BaseOutput,
     Collector,
     ExecutionOptions,
     Generator,
     InputId,
+    IteratorOutputInfo,
+    IterOutputId,
     Lazy,
     NodeContext,
     NodeData,
@@ -143,7 +146,11 @@ def enforce_generator_output(raw_output: object, node: NodeData) -> GeneratorOut
         assert isinstance(
             raw_output, Generator
         ), "Expected the output to be a generator"
-        return GeneratorOutput(generator=raw_output, partial_output=partial)
+        return GeneratorOutput(
+            info=generator_output,
+            generator=raw_output,
+            partial_output=partial,
+        )
 
     assert l > len(generator_output.outputs)
     assert isinstance(raw_output, (tuple, list))
@@ -159,7 +166,11 @@ def enforce_generator_output(raw_output: object, node: NodeData) -> GeneratorOut
         if o.id not in generator_output.outputs:
             partial[i] = o.enforce(rest.pop(0))
 
-    return GeneratorOutput(generator=iterator, partial_output=partial)
+    return GeneratorOutput(
+        info=generator_output,
+        generator=iterator,
+        partial_output=partial,
+    )
 
 
 def run_node(
@@ -321,6 +332,7 @@ class RegularOutput:
 
 @dataclass(frozen=True)
 class GeneratorOutput:
+    info: IteratorOutputInfo
     generator: Generator
     partial_output: Output
 
@@ -618,7 +630,13 @@ def get_lazy_evaluation_time():
             self.__send_node_finish(node, execution_time)
         elif isinstance(output, GeneratorOutput):
             await self.__send_node_broadcast(
-                node, output.partial_output, output.generator.expected_length
+                node,
+                output.partial_output,
+                output_sequence_types={
+                    output.info.id: navi.named(
+                        "Sequence", {"length": output.generator.expected_length}
+                    )
+                },
             )
             # TODO: execution time
 
@@ -1010,7 +1028,10 @@ def __send_node_progress_done(self, node: Node, length: int):
         )
 
     async def __send_node_broadcast(
-        self, node: Node, output: Output, expected_length: int | None = None
+        self,
+        node: Node,
+        output: Output,
+        output_sequence_types: dict[IterOutputId, object] | None = None,
     ):
         def compute_broadcast_data():
             if self.progress.aborted:
@@ -1032,7 +1053,7 @@ async def send_broadcast():
                         "nodeId": node.id,
                         "data": data,
                         "types": types,
-                        "expectedLength": expected_length,
+                        "sequenceTypes": output_sequence_types,
                     },
                 }
             )

src/common/Backend.ts

@@ -6,6 +6,7 @@ import {
     FeatureState,
     InputId,
     InputValue,
+    IterOutputTypes,
     NodeSchema,
     OutputData,
     OutputTypes,
@@ -341,7 +342,7 @@ export interface BackendEventMap {
         nodeId: string;
         data: OutputData;
         types: OutputTypes;
-        expectedLength?: number | null;
+        sequenceTypes?: IterOutputTypes | null;
     };
     'backend-status': {
         message: string;

src/common/common-types.ts

@@ -16,8 +16,8 @@ export interface Size {
 export type SchemaId = string & { readonly __schemaId: never };
 export type InputId = number & { readonly __inputId: never };
 export type OutputId = number & { readonly __outputId: never };
-export type IteratorInputId = number & { readonly __iteratorInputId: never };
-export type IteratorOutputId = number & { readonly __iteratorOutputId: never };
+export type IterInputId = number & { readonly __iteratorInputId: never };
+export type IterOutputId = number & { readonly __iteratorOutputId: never };
 export type GroupId = number & { readonly __groupId: never };
 export type PackageId = string & { readonly __packageId: never };
 export type FeatureId = string & { readonly __featureId: never };
@@ -279,14 +279,15 @@ export type InputHeight = Readonly<Record<InputId, number>>;
 export type OutputData = Readonly<Record<OutputId, unknown>>;
 export type OutputHeight = Readonly<Record<OutputId, number>>;
 export type OutputTypes = Readonly<Partial<Record<OutputId, ExpressionJson | null>>>;
+export type IterOutputTypes = Readonly<Partial<Record<IterOutputId, ExpressionJson | null>>>;
 
 export interface IteratorInputInfo {
-    readonly id: IteratorInputId;
+    readonly id: IterInputId;
     readonly inputs: readonly InputId[];
     readonly sequenceType: ExpressionJson;
 }
 export interface IteratorOutputInfo {
-    readonly id: IteratorOutputId;
+    readonly id: IterOutputId;
     readonly outputs: readonly OutputId[];
     readonly sequenceType: ExpressionJson;
 }

src/common/nodes/TypeState.ts

@@ -1,5 +1,5 @@
 import { EvaluationError, NonNeverType, Type, isSameType } from '@chainner/navi';
-import { EdgeData, InputId, NodeData, OutputId, SchemaId } from '../common-types';
+import { EdgeData, InputId, IterOutputId, NodeData, OutputId, SchemaId } from '../common-types';
 import { log } from '../log';
 import { PassthroughMap } from '../PassthroughMap';
 import {
@@ -22,23 +22,38 @@ const assignmentErrorEquals = (
         isSameType(a.inputType, b.inputType)
     );
 };
+const mapEqual = <K, V extends NonNullable<unknown>>(
+    a: ReadonlyMap<K, V>,
+    b: ReadonlyMap<K, V>,
+    eq: (a: V, b: V) => boolean
+): boolean => {
+    if (a.size !== b.size) return false;
+    for (const [key, value] of a) {
+        const otherValue = b.get(key);
+        if (otherValue === undefined || !eq(value, otherValue)) return false;
+    }
+    return true;
+};
+const arrayEqual = <T>(
+    a: ReadonlyArray<T>,
+    b: ReadonlyArray<T>,
+    eq: (a: T, b: T) => boolean
+): boolean => {
+    if (a.length !== b.length) return false;
+    for (let i = 0; i < a.length; i += 1) {
+        if (!eq(a[i], b[i])) return false;
+    }
+    return true;
+};
 const instanceEqual = (a: FunctionInstance, b: FunctionInstance): boolean => {
     if (a.definition !== b.definition) return false;
 
-    for (const [key, value] of a.inputs) {
-        const otherValue = b.inputs.get(key);
-        if (!otherValue || !isSameType(value, otherValue)) return false;
-    }
-
-    for (const [key, value] of a.outputs) {
-        const otherValue = b.outputs.get(key);
-        if (!otherValue || !isSameType(value, otherValue)) return false;
-    }
+    if (!mapEqual(a.inputs, b.inputs, isSameType)) return false;
+    if (!mapEqual(a.inputSequence, b.inputSequence, isSameType)) return false;
+    if (!mapEqual(a.outputs, b.outputs, isSameType)) return false;
+    if (!mapEqual(a.outputSequence, b.outputSequence, isSameType)) return false;
 
-    if (a.inputErrors.length !== b.inputErrors.length) return false;
-    for (let i = 0; i < a.inputErrors.length; i += 1) {
-        if (!assignmentErrorEquals(a.inputErrors[i], b.inputErrors[i])) return false;
-    }
+    if (!arrayEqual(a.inputErrors, b.inputErrors, assignmentErrorEquals)) return false;
 
     return true;
 };
@@ -65,7 +80,8 @@ export class TypeState {
     static create(
         nodesMap: ReadonlyMap<string, Node<NodeData>>,
         rawEdges: readonly Edge<EdgeData>[],
-        outputNarrowing: ReadonlyMap<string, ReadonlyMap<OutputId | 'length', Type>>,
+        outputNarrowing: ReadonlyMap<string, ReadonlyMap<OutputId, Type>>,
+        sequenceOutputNarrowing: ReadonlyMap<string, ReadonlyMap<IterOutputId, Type>>,
         functionDefinitions: ReadonlyMap<SchemaId, FunctionDefinition>,
         passthrough?: PassthroughMap,
         previousTypeState?: TypeState
@@ -127,6 +143,7 @@ export class TypeState {
                         return undefined;
                     },
                     outputNarrowing.get(n.id),
+                    sequenceOutputNarrowing.get(n.id),
                     passthroughInfo
                 );
             } catch (error) {

src/common/types/function.ts

@@ -19,9 +19,9 @@ import {
     Input,
     InputId,
     InputSchemaValue,
-    IteratorInputId,
+    IterInputId,
+    IterOutputId,
     IteratorInputInfo,
-    IteratorOutputId,
     IteratorOutputInfo,
     NodeSchema,
     Output,
@@ -56,9 +56,9 @@ const getParamRefs = <R extends ParamRef>(
 };
 
 export const getInputParamName = (inputId: InputId) => `Input${inputId}` as const;
-export const getIterInputParamName = (id: IteratorInputId) => `IterInput${id}` as const;
+export const getIterInputParamName = (id: IterInputId) => `IterInput${id}` as const;
 export const getOutputParamName = (outputId: OutputId) => `Output${outputId}` as const;
-export const getIterOutputParamName = (id: IteratorOutputId) => `IterOutput${id}` as const;
+export const getIterOutputParamName = (id: IterOutputId) => `IterOutput${id}` as const;
 
 interface BaseDesc<P extends GenericParam> {
     readonly type: P;
@@ -591,7 +591,8 @@ export class FunctionInstance {
     static fromPartialInputs(
         definition: FunctionDefinition,
         partialInputs: (inputId: InputId) => NonNeverType | undefined,
-        outputNarrowing: ReadonlyMap<OutputId | 'length', Type> = EMPTY_MAP,
+        outputNarrowing: ReadonlyMap<OutputId, Type> = EMPTY_MAP,
+        sequenceOutputNarrowing: ReadonlyMap<IterOutputId, Type> = EMPTY_MAP,
         passthrough?: PassthroughInfo
     ): FunctionInstance {
         const inputErrors: FunctionInputAssignmentError[] = [];
@@ -689,11 +690,12 @@ export class FunctionInstance {
                     type = item.default;
                 }
 
-                if (item.type === 'Output') {
-                    const narrowing = outputNarrowing.get(item.output.id);
-                    if (narrowing) {
-                        type = intersect(narrowing, type);
-                    }
+                const narrowing =
+                    item.type === 'Output'
+                        ? outputNarrowing.get(item.output.id)
+                        : sequenceOutputNarrowing.get(item.iterOutput.id);
+                if (narrowing) {
+                    type = intersect(narrowing, type);
                 }
 
                 if (type.type === 'never') {
@@ -708,28 +710,7 @@ export class FunctionInstance {
                     scope.assignParameter(getOutputParamName(item.output.id), type);
                 } else {
                     for (const id of item.iterOutput.outputs) {
-                        if (item.iterOutput.outputs.includes(id)) {
-                            const predeterminedLength = outputNarrowing.get('length');
-                            if (predeterminedLength && predeterminedLength.type !== 'never') {
-                                const sequenceType = evaluate(
-                                    fromJson(
-                                        `Sequence { length: ${predeterminedLength.toString()} }`
-                                    ),
-                                    scope
-                                );
-                                if (sequenceType.type !== 'never') {
-                                    outputLengths.set(id, sequenceType);
-                                }
-                            } else {
-                                const lengthType = evaluate(
-                                    fromJson(item.iterOutput.sequenceType),
-                                    scope
-                                );
-                                if (lengthType.type !== 'never') {
-                                    outputLengths.set(id, lengthType);
-                                }
-                            }
-                        }
+                        outputLengths.set(id, type);
                     }
                 }
                 scope.assignParameter(item.param, type);

src/main/cli/run.ts

@@ -16,7 +16,7 @@ import { SchemaMap } from '../../common/SchemaMap';
 import { ChainnerSettings } from '../../common/settings/settings';
 import { FunctionDefinition } from '../../common/types/function';
 import { ProgressController, ProgressMonitor, ProgressToken } from '../../common/ui/progress';
-import { assertNever, delay } from '../../common/util';
+import { EMPTY_MAP, assertNever, delay } from '../../common/util';
 import { RunArguments } from '../arguments';
 import { BackendProcess } from '../backend/process';
 import { setupBackend } from '../backend/setup';
@@ -143,7 +143,14 @@ const ensureStaticCorrectness = (
     }
 
     const byId = new Map(nodes.map((n) => [n.id, n]));
-    const typeState = TypeState.create(byId, edges, new Map(), functionDefinitions, passthrough);
+    const typeState = TypeState.create(
+        byId,
+        edges,
+        EMPTY_MAP,
+        EMPTY_MAP,
+        functionDefinitions,
+        passthrough
+    );
     const chainLineage = new ChainLineage(schemata, nodes, edges);
 
     const invalidNodes = nodes.flatMap((node) => {

src/renderer/components/NodeDocumentation/NodeExample.tsx

@@ -119,6 +119,7 @@ export const NodeExample = memo(({ selectedSchema }: NodeExampleProps) => {
             new Map([[nodeId, node]]),
             EMPTY_ARRAY,
             EMPTY_MAP,
+            EMPTY_MAP,
             functionDefinitions,
             PassthroughMap.EMPTY
         );