Ranges and Exception handling PR 2724

[Robert burner Schadek via Digitalmars-d]

Your idea designs an idiom on how to let ranges handle 
exceptions. My PR is about how to handle exceptions thrown by 
ranges. Both sort-of do the same thing but at different points. 
Your design idiom needs source access (needs to be programmed 
in). Mine can be bolted on later (an additional element in the 
range chain). Of course fixing an erroneous range might be tricky 
but than exception handling and recovering is not easy to being 
with.

Back to your problem: If you do the foreach by hand, can you 
place the part that throws (popFront, front or empty) in an try 
catch block and still iterate to the next element afterwards?