Function isSymbolObject

src/math-json/utils.ts:30–34

(
  expr: MathJsonExpression | null
)

}

export function isSymbolObject(
  expr: MathJsonExpression | null
): expr is MathJsonSymbolObject {
  return expr !== null && typeof expr === 'object' && 'sym' in expr;
}

export function isStringObject(
  expr: MathJsonExpression | null