单件能编译通过么?
Closed this issue · 1 comments
yongxin-ms commented
`template <class... P>
static T &instance(P... args)
{
if (s_ins)
{
return *s_ins;
}
std::call_once(s_once, [&]() {
s_ins = new T(args...);
});
return *s_ins;
}
static T &instance()
{
if (s_ins)
{
return *s_ins;
}
std::call_once(s_once, [&]() {
s_ins = new T();
});
return *s_ins;
}
`
单件写成这样应该编不过的吧?估计得写成宏才能支持多种参数的情况吧,或者能把参数保存下来么?第一次使用完整的参数,后面使用保存下来的参数?
cageq commented
use std::tuple and std::apply or add init method to singleton class