For instance, if you have a% union declaration that includes both integer and pointer values, and you declare a token to use the pointer value, but your lexer fills in the integer value 例如,如果您有一个既包括整型值又包括指针型值的%union声明,而且您声明了一个记号来使用指针类型的值,但是您的lexer却赋与其整型的值