Language Feature: Loop shortcut constructs

[idavis]

Add break and continue as statements.

for i in 1..5 {
    if i == 4 {
        break;
    }
    continue;
}

Only legal in while and for loops.

break moves execution to the statement following the block expression. Using break or continue within a block changes that blocks type to Unit

Unknowns

• behavior of break/continue based on quantum measurements
• behavior in conjugate expressions

   within {
       for i in 1..5 {
           if i == 4 {
               break;
           }
           continue;
       }
   }
   apply {
       X(q);
   }