do {…} while(false)

Question

I was looking at some code by an individual and noticed he seems to have a pattern in his functions:

 function()
{
 

        

Answer 1

I work with Adobe InDesign SDK, and the InDesign SDK examples have almost every function written like this. It is due to fact that the function are usually really long. Where you need to do QueryInterface(...) to get anything from the application object model. So usually every QueryInterface is followed by if not went well, break.