eyeglass/src/util/assertions.ts

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import {inspect} from "util";
export function unreachable(argument?: never, argmentName?: string): never {
  if (argmentName) {
    throw new Error(`Unexpected value for ${argmentName}: ${inspect(argument)}`);
  } else {
    throw new Error(`Unreachable code location was reached: ${inspect(argument)}`);
  }
}