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

Here's my five cents to this discussion:

struct Foo {
    Foo(int, double) {}
};

struct Bar {
    explicit Bar(int, double) {}
};

void foo(const Foo&) {}
void bar(const Bar&) {}

int main(int argc, char * argv[]) {
    foo({ 42, 42.42 }); // valid
    bar({ 42, 42.42 }); // invalid
    return 0;
}

As you can easily see, explicit prevents from using initializer list alongside with bar function bacause the constructor of struct Bar is declared as explicit.