// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

import { InferenceHandler } from './backend';
import { Graph } from './graph';
import { Tensor } from './tensor';

export type OperatorImplementation<T> = (inferenceHandler: InferenceHandler, inputs: Tensor[], context: T) => Tensor[];
export type OperatorInitialization<T> = (node: Graph.Node, graph: Graph) => T;

export interface Operator {
  readonly impl: OperatorImplementation<unknown>;
  readonly context: Graph.Node | unknown;
}

export const NUMBER_TYPES: readonly Tensor.DataType[] = [
  'float32',
  'float64',
  'int32',
  'int16',
  'int8',
  'uint16',
  'uint32',
  'uint8',
];
export const INT_TYPES: readonly Tensor.DataType[] = ['int32', 'int16', 'int8', 'uint16', 'uint32', 'uint8'];
export const FLOAT_TYPES: readonly Tensor.DataType[] = ['float32', 'float64'];