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C++ inline 有什么用?? - 知乎 inline命名空间 inline命名空间是C++11标准中引入的关键词,对于一个用inline修饰的内嵌命名空间而言,它所包含的成员在可见性上如同声明在外围命名空间中一样,所以inline之于命名空间更具有字面上的含义:将内嵌命名空间在外围命名空间中“展开”。
为何cpp类中静态属性用inline修饰? - 知乎 1、编译器保证inline static 只有一份,即使在多个cpp中 2、降低编译时间 Note: A static constexpr data member of a class is implicitly inline from C++17 This special case does not change the semantics of existing code, but means that it is now unnecessary to provide a separate definition for the member in a source file This applies only to static constexpr data members