How can I pass an initialized object

Currently, in my code I have

vector_2 v1(1.0,2.0);
Frame.Draw( v1(2.0f,1.0f) );

where vector_2 is a struct with a constructor that takes 2 doubles (coordinates). Frame is an instance of some class with a function that takes a vector_2 as a parameter. This compiles just fine and the way I want.

However, when I directly try without initializing a vector prior to the function call, e.g.:

Frame.Draw( vector_2 v1(2.0f,1.0f) );

The compiler fails with the error message: expected primary-expression before v1. I was hoping to directly initialize within the function call.

I wonder if this is possible in C++, I may not know the proper syntax.