在C ++ 20中是否会删除宏`断言`？

Question

According to cppreference , assert will be used as a C++ attribute.

However, there already exist tons of projects heavily dependent on the macro assert , is there any bad effect?

Answer 1

No. The proposal p0542r5 which introduces C++20 contracts says:

Note that while assert(expression) would expand as a function-like macro with the appropriate header, assert: is not a function-like invocation, so does not expand.

Answer 2

assert的新用法不会导致任何问题，因为它后面没有(因此函数式宏assert(blah)不会被调用）。