Function op

tfjs-core/src/ops/operation.ts:27–66

(f: {[name: string]: T})

 * memory usage after the function is done.
 */
export function op<T extends Function>(f: {[name: string]: T}): T {
  const keys = Object.keys(f);
  if (keys.length !== 1) {
    throw new Error(
        `Please provide an object with a single key ` +
        `(operation name) mapping to a function. Got an object with ` +
        `${keys.length} keys.`);
  }

  let opName = keys[0];
  const fn = f[opName];

  // Strip the underscore from the end of the function name.
  if (opName.endsWith('_')) {
    opName = opName.substring(0, opName.length - 1);
  }

  // add an __op suffix to distinguish ops from kernels in tf.profile
  opName = opName + OP_SCOPE_SUFFIX;

  // tslint:disable-next-line:no-any
  const f2 = (...args: any[]) => {
    ENGINE.startScope(opName);
    try {
      const result = fn(...args);
      if (isPromise(result)) {
        console.error('Cannot return a Promise inside of tidy.');
      }
      ENGINE.endScope(result);
      return result;
    } catch (ex) {
      ENGINE.endScope(null);
      throw ex;
    }
  };
  Object.defineProperty(f2, 'name', {value: opName, configurable: true});

  // tslint:disable-next-line:no-any
  return f2 as any as T;
}