Most vexing parse C++11

Question

I\'m confused about Y y {X{}}; what exactly this line does and what is its connection to the most vexing parse. A brief explanation is appreciated:

Answer 1

Y y {X{}};

This is perfect and creates an object y passing a temporary object of type X to the constructor. There is NO vexing parse (most or otherwise). In fact, the construction using {} was introduced to solve the issue of vexing parse in many cases, such as these:

 Y y1();
 Y y2(X());

Both belongs to (most) vexing parse because of which both declares functions, instead of objects.

However, if you use curly braces called brace-initialization:

 Y y1{};
 Y y2{X{}}; //as you've done yourself

then both declares objects, not functions, as expected.