Explicit constructor taking multiple arguments

Question

Does making a constructor having multiple arguments explicit have any (useful) effect?

Example:

class A {
    public:
        explicit A( in         


        

Answer 1

You'd stumble upon it for brace initialization (for instance in arrays)

struct A {
        explicit A( int b, int c ) {}
};

struct B {
         B( int b, int c ) {}
};

int main() {
    B b[] = {{1,2}, {3,5}}; // OK

    A a1[] = {A{1,2}, A{3,4}}; // OK

    A a2[] = {{1,2}, {3,4}}; // Error

    return 0;
}