Cast to 'unknown' instead of '{}' in double assertions (#7116)

Avoid casting through '{}' with 'foo as {} as Bar' and instead use 'unknown', i.e. 'foo as unknown as Bar'. This is the preferred method according to Google's style guide. Internal link: go/tsstyle#double-assertions.

Author: mattsoulanille

tfjs-backend-cpu/src/backend_cpu.ts

@@ -82,7 +82,7 @@ export class MathBackendCPU extends KernelBackend {
     if (dtype === 'string' && values != null && values.length > 0 &&
         util.isString(values[0])) {
       const encodedValues =
-          (values as {} as string[]).map(d => util.encodeString(d));
+          (values as unknown as string[]).map(d => util.encodeString(d));
 
       outId = this.write(encodedValues, shape, dtype);
     } else {

tfjs-backend-cpu/src/kernels/Abs.ts

@@ -44,5 +44,5 @@ export const abs = (args: {inputs: AbsInputs, backend: MathBackendCPU}) => {
 export const absConfig: KernelConfig = {
   kernelName: Abs,
   backendName: 'cpu',
-  kernelFunc: abs as {} as KernelFunc,
+  kernelFunc: abs as unknown as KernelFunc,
 };

tfjs-backend-cpu/src/kernels/AddN.ts

@@ -44,5 +44,5 @@ export function addN(args: {inputs: AddNInputs, backend: MathBackendCPU}):
 export const addNConfig: KernelConfig = {
   kernelName: AddN,
   backendName: 'cpu',
-  kernelFunc: addN as {} as KernelFunc
+  kernelFunc: addN as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/All.ts

@@ -79,5 +79,5 @@ export function all(
 export const allConfig: KernelConfig = {
   kernelName: All,
   backendName: 'cpu',
-  kernelFunc: all as {} as KernelFunc
+  kernelFunc: all as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Any.ts

@@ -79,5 +79,5 @@ export function any(
 export const anyConfig: KernelConfig = {
   kernelName: Any,
   backendName: 'cpu',
-  kernelFunc: any as {} as KernelFunc
+  kernelFunc: any as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/ArgMax.ts

@@ -73,5 +73,5 @@ export function argMax(
 export const argMaxConfig: KernelConfig = {
   kernelName: ArgMax,
   backendName: 'cpu',
-  kernelFunc: argMax as {} as KernelFunc
+  kernelFunc: argMax as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/ArgMin.ts

@@ -73,5 +73,5 @@ export function argMin(
 export const argMinConfig: KernelConfig = {
   kernelName: ArgMin,
   backendName: 'cpu',
-  kernelFunc: argMin as {} as KernelFunc
+  kernelFunc: argMin as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/AvgPool.ts

@@ -57,5 +57,5 @@ export function avgPool(
 export const avgPoolConfig: KernelConfig = {
   kernelName: AvgPool,
   backendName: 'cpu',
-  kernelFunc: avgPool as {} as KernelFunc
+  kernelFunc: avgPool as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/AvgPool3D.ts

@@ -46,5 +46,5 @@ export function avgPool3D(args: {
 export const avgPool3DConfig: KernelConfig = {
   kernelName: AvgPool3D,
   backendName: 'cpu',
-  kernelFunc: avgPool3D as {} as KernelFunc
+  kernelFunc: avgPool3D as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/AvgPool3DGrad.ts

@@ -108,5 +108,5 @@ export function avgPool3DGrad(args: {
 export const avgPool3DGradConfig: KernelConfig = {
   kernelName: AvgPool3DGrad,
   backendName: 'cpu',
-  kernelFunc: avgPool3DGrad as {} as KernelFunc
+  kernelFunc: avgPool3DGrad as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/AvgPoolGrad.ts

@@ -88,5 +88,5 @@ export function avgPoolGrad(args: {
 export const avgPoolGradConfig: KernelConfig = {
   kernelName: AvgPoolGrad,
   backendName: 'cpu',
-  kernelFunc: avgPoolGrad as {} as KernelFunc
+  kernelFunc: avgPoolGrad as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/BatchMatMul.ts

@@ -135,5 +135,5 @@ export function batchMatMul(args: {
 export const batchMatMulConfig: KernelConfig = {
   kernelName: BatchMatMul,
   backendName: 'cpu',
-  kernelFunc: batchMatMul as {} as KernelFunc,
+  kernelFunc: batchMatMul as unknown as KernelFunc,
 };

tfjs-backend-cpu/src/kernels/BatchNorm.ts

@@ -90,5 +90,5 @@ export function batchNorm(args: {
 export const batchNormConfig: KernelConfig = {
   kernelName: FusedBatchNorm,
   backendName: 'cpu',
-  kernelFunc: batchNorm as {} as KernelFunc,
+  kernelFunc: batchNorm as unknown as KernelFunc,
 };

tfjs-backend-cpu/src/kernels/BatchToSpaceND.ts

@@ -66,5 +66,5 @@ export function batchToSpaceND(args: {
 export const batchToSpaceNDConfig: KernelConfig = {
   kernelName: BatchToSpaceND,
   backendName: 'cpu',
-  kernelFunc: batchToSpaceND as {} as KernelFunc
+  kernelFunc: batchToSpaceND as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Bincount.ts

@@ -41,5 +41,5 @@ export function bincount(args: {
 export const bincountConfig: KernelConfig = {
   kernelName: Bincount,
   backendName: 'cpu',
-  kernelFunc: bincount as {} as KernelFunc
+  kernelFunc: bincount as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Cast.ts

@@ -97,5 +97,5 @@ export function cast(
 export const castConfig: KernelConfig = {
   kernelName: Cast,
   backendName: 'cpu',
-  kernelFunc: cast as {} as KernelFunc
+  kernelFunc: cast as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/ClipByValue.ts

@@ -20,7 +20,7 @@ import {ClipByValue, ClipByValueAttrs, KernelConfig} from '@tensorflow/tfjs-core
 import {unaryKernelFunc} from '../utils/unary_utils';
 
 export const clipByValue = unaryKernelFunc(ClipByValue, (xi, attrs) => {
-  const clipAttrs = attrs as {} as ClipByValueAttrs;
+  const clipAttrs = attrs as unknown as ClipByValueAttrs;
   if (xi > clipAttrs.clipValueMax) {
     return clipAttrs.clipValueMax;
   }

tfjs-backend-cpu/src/kernels/Complex.ts

@@ -45,5 +45,5 @@ export function complex(args: {inputs: ComplexInputs, backend: MathBackendCPU}):
 export const complexConfig: KernelConfig = {
   kernelName: Complex,
   backendName: 'cpu',
-  kernelFunc: complex as {} as KernelFunc
+  kernelFunc: complex as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/ComplexAbs.ts

@@ -41,5 +41,5 @@ export const complexAbs =
 export const complexAbsConfig: KernelConfig = {
   kernelName: ComplexAbs,
   backendName: 'cpu',
-  kernelFunc: complexAbs as {} as KernelFunc,
+  kernelFunc: complexAbs as unknown as KernelFunc,
 };

tfjs-backend-cpu/src/kernels/Concat.ts

@@ -105,5 +105,5 @@ export function concat(
 export const concatConfig: KernelConfig = {
   kernelName: Concat,
   backendName: 'cpu',
-  kernelFunc: concat as {} as KernelFunc
+  kernelFunc: concat as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv2D.ts

@@ -105,5 +105,5 @@ export function conv2D(
 export const conv2DConfig: KernelConfig = {
   kernelName: Conv2D,
   backendName: 'cpu',
-  kernelFunc: conv2D as {} as KernelFunc
+  kernelFunc: conv2D as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv2DBackpropFilter.ts

@@ -89,5 +89,5 @@ export function conv2DBackpropFilter(args: {
 export const conv2DBackpropFilterConfig: KernelConfig = {
   kernelName: Conv2DBackpropFilter,
   backendName: 'cpu',
-  kernelFunc: conv2DBackpropFilter as {} as KernelFunc
+  kernelFunc: conv2DBackpropFilter as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv2DBackpropInput.ts

@@ -117,5 +117,5 @@ export function conv2DBackpropInput(args: {
 export const conv2DBackpropInputConfig: KernelConfig = {
   kernelName: Conv2DBackpropInput,
   backendName: 'cpu',
-  kernelFunc: conv2DBackpropInput as {} as KernelFunc
+  kernelFunc: conv2DBackpropInput as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv3D.ts

@@ -111,5 +111,5 @@ export function conv3D(
 export const conv3DConfig: KernelConfig = {
   kernelName: Conv3D,
   backendName: 'cpu',
-  kernelFunc: conv3D as {} as KernelFunc
+  kernelFunc: conv3D as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv3DBackpropFilterV2.ts

@@ -117,5 +117,5 @@ export function conv3DBackpropFilterV2(args: {
 export const conv3DBackpropFilterV2Config: KernelConfig = {
   kernelName: Conv3DBackpropFilterV2,
   backendName: 'cpu',
-  kernelFunc: conv3DBackpropFilterV2 as {} as KernelFunc
+  kernelFunc: conv3DBackpropFilterV2 as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Conv3DBackpropInputV2.ts

@@ -124,5 +124,5 @@ export function conv3DBackpropInputV2(args: {
 export const conv3DBackpropInputV2Config: KernelConfig = {
   kernelName: Conv3DBackpropInputV2,
   backendName: 'cpu',
-  kernelFunc: conv3DBackpropInputV2 as {} as KernelFunc
+  kernelFunc: conv3DBackpropInputV2 as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/CropAndResize.ts

@@ -162,5 +162,5 @@ export function cropAndResize(args: {
 export const cropAndResizeConfig: KernelConfig = {
   kernelName: CropAndResize,
   backendName: 'cpu',
-  kernelFunc: cropAndResize as {} as KernelFunc
+  kernelFunc: cropAndResize as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Cumprod.ts

@@ -84,5 +84,5 @@ export function cumprod(
 export const cumprodConfig: KernelConfig = {
   kernelName: Cumprod,
   backendName: 'cpu',
-  kernelFunc: cumprod as {} as KernelFunc
+  kernelFunc: cumprod as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Cumsum.ts

@@ -84,5 +84,5 @@ export function cumsum(
 export const cumsumConfig: KernelConfig = {
   kernelName: Cumsum,
   backendName: 'cpu',
-  kernelFunc: cumsum as {} as KernelFunc
+  kernelFunc: cumsum as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/DenseBincount.ts

@@ -54,5 +54,5 @@ export function denseBincount(args: {
 export const denseBincountConfig: KernelConfig = {
   kernelName: DenseBincount,
   backendName: 'cpu',
-  kernelFunc: denseBincount as {} as KernelFunc
+  kernelFunc: denseBincount as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/DepthToSpace.ts

@@ -72,5 +72,5 @@ export function depthToSpace(args: {
 export const depthToSpaceConfig: KernelConfig = {
   kernelName: DepthToSpace,
   backendName: 'cpu',
-  kernelFunc: depthToSpace as {} as KernelFunc
+  kernelFunc: depthToSpace as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/DepthwiseConv2dNative.ts

@@ -104,5 +104,5 @@ export function depthwiseConv2dNative(args: {
 export const depthwiseConv2dNativeConfig: KernelConfig = {
   kernelName: DepthwiseConv2dNative,
   backendName: 'cpu',
-  kernelFunc: depthwiseConv2dNative as {} as KernelFunc
+  kernelFunc: depthwiseConv2dNative as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/DepthwiseConv2dNativeBackpropFilter.ts

@@ -83,5 +83,5 @@ export function depthwiseConv2dNativeBackpropFilter(args: {
 export const depthwiseConv2dNativeBackpropFilterConfig: KernelConfig = {
   kernelName: DepthwiseConv2dNativeBackpropFilter,
   backendName: 'cpu',
-  kernelFunc: depthwiseConv2dNativeBackpropFilter as {} as KernelFunc
+  kernelFunc: depthwiseConv2dNativeBackpropFilter as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/DepthwiseConv2dNativeBackpropInput.ts

@@ -106,5 +106,5 @@ export function depthwiseConv2dNativeBackpropInput(args: {
 export const depthwiseConv2dNativeBackpropInputConfig: KernelConfig = {
   kernelName: DepthwiseConv2dNativeBackpropInput,
   backendName: 'cpu',
-  kernelFunc: depthwiseConv2dNativeBackpropInput as {} as KernelFunc
+  kernelFunc: depthwiseConv2dNativeBackpropInput as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Diag.ts

@@ -41,5 +41,5 @@ export function diag(args: {inputs: DiagInputs, backend: MathBackendCPU}):
 export const diagConfig: KernelConfig = {
   kernelName: Diag,
   backendName: 'cpu',
-  kernelFunc: diag as {} as KernelFunc
+  kernelFunc: diag as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Dilation2D.ts

@@ -24,7 +24,7 @@ export const dilation2DConfig: KernelConfig = {
   backendName: 'cpu',
   kernelFunc: ({inputs, backend, attrs}) => {
     const {x, filter} = inputs as Dilation2DInputs;
-    const {strides, pad, dilations} = attrs as {} as Dilation2DAttrs;
+    const {strides, pad, dilations} = attrs as unknown as Dilation2DAttrs;
     const cpuBackend = backend as MathBackendCPU;
 
     const xVals = cpuBackend.data.get(x.dataId).values as TypedArray;

tfjs-backend-cpu/src/kernels/Dilation2DBackpropFilter.ts

@@ -26,7 +26,7 @@ export const dilation2DBackpropFilterConfig: KernelConfig = {
   kernelFunc: ({inputs, backend, attrs}) => {
     const {x, filter, dy} =
         inputs as {x: Tensor4D, filter: Tensor3D, dy: Tensor4D};
-    const {strides, pad, dilations} = attrs as {} as Dilation2DAttrs;
+    const {strides, pad, dilations} = attrs as unknown as Dilation2DAttrs;
     const cpuBackend = backend as MathBackendCPU;
 
     const $x =

tfjs-backend-cpu/src/kernels/Dilation2DBackpropInput.ts

@@ -26,7 +26,7 @@ export const dilation2DBackpropInputConfig: KernelConfig = {
   kernelFunc: ({inputs, backend, attrs}) => {
     const {x, filter, dy} =
         inputs as {x: Tensor4D, filter: Tensor3D, dy: Tensor4D};
-    const {strides, pad, dilations} = attrs as {} as Dilation2DAttrs;
+    const {strides, pad, dilations} = attrs as unknown as Dilation2DAttrs;
     const cpuBackend = backend as MathBackendCPU;
 
     const $x =

tfjs-backend-cpu/src/kernels/Einsum.ts

@@ -98,5 +98,5 @@ export function einsum(
 export const einsumConfig: KernelConfig = {
   kernelName: Einsum,
   backendName: 'cpu',
-  kernelFunc: einsum as {} as KernelFunc
+  kernelFunc: einsum as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/EluGrad.ts

@@ -45,5 +45,5 @@ export function eluGrad(args: {inputs: EluGradInputs, backend: MathBackendCPU}):
 export const eluGradConfig: KernelConfig = {
   kernelName: EluGrad,
   backendName: 'cpu',
-  kernelFunc: eluGrad as {} as KernelFunc
+  kernelFunc: eluGrad as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/ExpandDims.ts

@@ -48,5 +48,5 @@ export function expandDims(args: {
 export const expandDimsConfig: KernelConfig = {
   kernelName: ExpandDims,
   backendName: 'cpu',
-  kernelFunc: expandDims as {} as KernelFunc
+  kernelFunc: expandDims as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/FFT.ts

@@ -52,5 +52,5 @@ export function fft(args: {inputs: FFTInputs, backend: MathBackendCPU}):
 export const fftConfig: KernelConfig = {
   kernelName: FFT,
   backendName: 'cpu',
-  kernelFunc: fft as {} as KernelFunc
+  kernelFunc: fft as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Fill.ts

@@ -34,7 +34,7 @@ export function fill(args: {backend: MathBackendCPU, attrs: FillAttrs}):
 export const fillConfig: KernelConfig = {
   kernelName: Fill,
   backendName: 'cpu',
-  kernelFunc: fill as {} as KernelFunc
+  kernelFunc: fill as unknown as KernelFunc
 };
 
 function fillValues(

tfjs-backend-cpu/src/kernels/FusedConv2D.ts

@@ -97,5 +97,5 @@ export function fusedConv2D(args: {
 export const fusedConv2DConfig: KernelConfig = {
   kernelName: FusedConv2D,
   backendName: 'cpu',
-  kernelFunc: fusedConv2D as {} as KernelFunc
+  kernelFunc: fusedConv2D as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/FusedDepthwiseConv2D.ts

@@ -63,5 +63,5 @@ export function fusedDepthwiseConv2D(args: {
 export const fusedDepthwiseConv2DConfig: KernelConfig = {
   kernelName: FusedDepthwiseConv2D,
   backendName: 'cpu',
-  kernelFunc: fusedDepthwiseConv2D as {} as KernelFunc
+  kernelFunc: fusedDepthwiseConv2D as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/GatherNd.ts

@@ -49,5 +49,5 @@ export function gatherNd(
 export const gatherNdConfig: KernelConfig = {
   kernelName: GatherNd,
   backendName: 'cpu',
-  kernelFunc: gatherNd as {} as KernelFunc
+  kernelFunc: gatherNd as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/GatherV2.ts

@@ -92,5 +92,5 @@ export function gatherV2(args: {
 export const gatherV2Config: KernelConfig = {
   kernelName: GatherV2,
   backendName: 'cpu',
-  kernelFunc: gatherV2 as {} as KernelFunc
+  kernelFunc: gatherV2 as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/IFFT.ts

@@ -52,5 +52,5 @@ export function ifft(args: {inputs: IFFTInputs, backend: MathBackendCPU}):
 export const ifftConfig: KernelConfig = {
   kernelName: IFFT,
   backendName: 'cpu',
-  kernelFunc: ifft as {} as KernelFunc
+  kernelFunc: ifft as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Identity.ts

@@ -32,5 +32,5 @@ export function identity(
 export const identityConfig: KernelConfig = {
   kernelName: Identity,
   backendName: 'cpu',
-  kernelFunc: identity as {} as KernelFunc
+  kernelFunc: identity as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Imag.ts

@@ -36,5 +36,5 @@ export function imag(args: {inputs: ImagInputs, backend: MathBackendCPU}):
 export const imagConfig: KernelConfig = {
   kernelName: Imag,
   backendName: 'cpu',
-  kernelFunc: imag as {} as KernelFunc
+  kernelFunc: imag as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/LRN.ts

@@ -63,5 +63,5 @@ export function lRN(
 export const LRNConfig: KernelConfig = {
   kernelName: LRN,
   backendName: 'cpu',
-  kernelFunc: lRN as {} as KernelFunc
+  kernelFunc: lRN as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/LRNGrad.ts

@@ -69,5 +69,5 @@ export function lRNGrad(
 export const LRNGradConfig: KernelConfig = {
   kernelName: LRNGrad,
   backendName: 'cpu',
-  kernelFunc: lRNGrad as {} as KernelFunc
+  kernelFunc: lRNGrad as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/LeakyRelu.ts

@@ -45,5 +45,5 @@ export function leakyRelu(args: {
 export const leakyReluConfig: KernelConfig = {
   kernelName: LeakyRelu,
   backendName: 'cpu',
-  kernelFunc: leakyRelu as {} as KernelFunc
+  kernelFunc: leakyRelu as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/LinSpace.ts

@@ -33,5 +33,5 @@ export function linSpace(args: {backend: MathBackendCPU, attrs: LinSpaceAttrs}):
 export const linSpaceConfig: KernelConfig = {
   kernelName: LinSpace,
   backendName: 'cpu',
-  kernelFunc: linSpace as {} as KernelFunc
+  kernelFunc: linSpace as unknown as KernelFunc
 };

tfjs-backend-cpu/src/kernels/Max.ts

@@ -74,5 +74,5 @@ export function max(
 export const maxConfig: KernelConfig = {
   kernelName: Max,
   backendName: 'cpu',
-  kernelFunc: max as {} as KernelFunc
+  kernelFunc: max as unknown as KernelFunc
 };