Function validateSequenceDefinition

src/compute-engine/sequence.ts:433–468

(
  ce: ComputeEngine,
  name: string,
  def: SequenceDefinition
)

      memo.set(memoKey, result);
    }

    return isNumber(result) ? result : undefined;
  };
}

/**
 * Validate a sequence definition.
 */
export function validateSequenceDefinition(
  ce: ComputeEngine,
  name: string,
  def: SequenceDefinition
): { valid: boolean; error?: string } {
  // Must have base cases
  if (!def.base || Object.keys(def.base).length === 0) {
    return {
      valid: false,
      error: `Sequence "${name}" requires at least one base case`,
    };
  }

  // Must have recurrence
  if (!def.recurrence) {
    return {
      valid: false,
      error: `Sequence "${name}" requires a recurrence relation`,
    };
  }

  // Parse recurrence to check validity
  const recurrence =
    typeof def.recurrence === 'string'
      ? ce.parse(def.recurrence)!
      : def.recurrence;

  if (!recurrence.isValid) {
    return {
      valid: false,
      error: `Invalid recurrence for "${name}": expression contains errors`,