参考资料
对比
C++ lambda IS NOT std::function.
// lambda: a C++ language construct for defining a n anonymous function.
// std::function: a type-erased wrapper around a "callable".
评论区老哥的总结
The way I understand it is:
- if you're just passing a callable somewhere use a lambda (pass it as a generic callable type)
- if you have to store the callable object or its implementation depends on runtime information then:
- if the callable is stateless, use a function pointer
- if the callable has state, then use a std::function
And since requiring your objects to be stateless is a big limitation, function pointers are almost never used except when you really need good performance is some hot code and you'd sacrifice flexibility to gain speed.
