Method recursive

benchmark/common.js:138–169

(keyIndex, prevConfig)

    // Perform a depth-first walk through all options to generate a
    // configuration list that contains all combinations.
    function recursive(keyIndex, prevConfig) {
      const key = keys[keyIndex];
      const values = options[key];

      for (const value of values) {
        if (typeof value !== 'number' && typeof value !== 'string' && typeof value !== 'boolean') {
          throw new TypeError(
            `configuration "${key}" had type ${typeof value}`);
        }
        if (typeof value !== typeof values[0]) {
          // This is a requirement for being able to consistently and
          // predictably parse CLI provided configuration values.
          throw new TypeError(`configuration "${key}" has mixed types`);
        }

        const currConfig = { [key]: value, ...prevConfig };

        if (keyIndex + 1 < keys.length) {
          recursive(keyIndex + 1, currConfig);
        } else {
          // Check if we should allow the current combination
          const allowed = combinationFilter({ ...currConfig });
          if (typeof allowed !== 'boolean') {
            throw new TypeError(
              'Combination filter must always return a boolean',
            );
          }
          if (allowed)
            queue.push(currConfig);
        }
      }
    }

    if (keys.length > 0) {
      recursive(0, {});