Function expressionToDictionaryValue

src/math-json/utils.ts:560–573

(
  expr: MathJsonExpression | null | undefined
)

}

function expressionToDictionaryValue(
  expr: MathJsonExpression | null | undefined
): DictionaryValue | null {
  if (expr === null || expr === undefined) return null;
  if (isStringObject(expr)) return expr.str;
  if (isNumberObject(expr)) return parseFloat(expr.num);
  if (isSymbolObject(expr)) return expr.sym;

  if (typeof expr === 'string' || typeof expr === 'number') return expr;

  if (Array.isArray(expr)) return { fn: expr } as MathJsonFunctionObject;

  return expr;
}