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《Effective C++》读书笔之六 Item 6. Explicitly disallow the use of compile-generated functions

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     Usually, if you don't want a class to support a particular kind of functionality, you simply don't declare the function that would provide it. But sometimes as the Item 5 points out,  if you don't declare them and somebody tries to call them, compilers declare them for you.     Usually, if you don't want a class to support


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