Function latex

test/utils.ts:243–257

(expr: Expression | undefined | null)

  if (expr === undefined) return 'UNDEFINED';
  if (expr === null) return 'NULL';

  errors = [];
  let result = '';
  try {
    result = engine.expr(expr)?.latex ?? 'NULL';
  } catch (e) {
    errors.push(e.toString());
  }
  if (result && errors.length !== 0) return result + '\n' + errors.join('\n');
  if (errors.length !== 0) return errors.join('\n');
  return result;
}

export function expressionError(latex: string): string | string[] {
  errors = [];
  engine.parse(latex);
  return errors.length === 1 ? errors[0] : errors;
}