摘要：If constructors were inherited in C++, it would cause many undesirable problems, and the main benefit of inheritance of members would not apply to con 阅读全文

摘要：op.h #define DMLC_ATTRIBUTE_UNUSED __attribute__((unused)) __attribute__((unused))：通常，如果声明了某个变量，但从未对其进行引用，编译器将发出警告。此属性指示编译器您预计不会使用某个变量，并指示它在未使用该变量时不要发 阅读全文