V2EX = way to explore
V2EX 是一个关于分享和探索的地方
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This topic created in 5462 days ago, the information mentioned may be changed or developed.
需要实现判断从模版传入的类是否拥有指定成员函数, 实现元编程.
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saierdia Nov 19, 2011 via Android
估计没办法，所以ms加了__if_exists
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