我试图实例化这样一组字符串:C++ 11均匀初始化:字段初始化不恒定
class POI {
public:
...
static const std::set<std::string> TYPES { "restaurant", "education", "financial", "health", "culture", "other" };
...
}
现在,我这样做时,我得到这些错误(全部在这条线):
error: field initializer is not constant
static const std::set<std::string> TYPES { "restaurant", "education", "financial", "health", "culture", "other" };
error: in-class initialization of static data member 'const std::set<std::basic_string<char> > POI::TYPES' of non-literal type
error: non-constant in-class initialization invalid for static member 'POI::TYPES'
error: (an out of class initialization is required)
error: 'POI::TYPES' cannot be initialized by a non-constant expression when being declared
这对我的眼睛是有意义的,如果我假设集合内的字符串不被视为常量。这真的是问题吗?不幸的是,我无法找到一种方法来将这些字符串作为const声明在初始化程序中。这可能吗?
NSDMI并不适用于静态成员 –
这就是N代表:-)(** N ** *上* S ** tatic ** D ** ata ** M ** ember ** I ** nitializer)。 – Jarod42