Avoiding implicit conversion in constructor. The 'explicit' keyword doesn't help here

Question

I am able to avoid the implicit conversion of a constructor using the explicit keyword. So now, conversions like A a1 = 10; can be avoided.

Answer 1

You can circumvent this problem by using braced initialization. For example:

struct A {
  A(int _a) : a(_a) {}
  int a;
};

A a{5}; // ok
A b{1.123}; // compile error

Proof