Function assertNotNull

src/assert.ts:3–7

(value: T | null | undefined, fieldName: string)

import type { Matrix } from "./type.js";

export function assertNotNull<T>(value: T | null | undefined, fieldName: string): asserts value is T {
  if (value == null) {
    throw new Error(`->${fieldName} is null or undefined`);
  }
}

export function assertDefined<T>(value: T | undefined, defaultValue: T): T {
  return typeof value === "undefined" ? defaultValue : value;