In order to allow an evaluator library to trigger type evaluation in
Ignore the fact that catch usually means exceptions which usually means some kind of failure. A piece of code is running and it just started some work that’s going to take a long time in the background, there’s no point waiting and the program can do something more useful while the stuff happens in the background. It “throws” an exception that is caught by a scheduler multiple layers of function calls up the stack. The scheduler saves the return address into a list of pending work to get back to, and then goes to find something that it can make progress on. Eventually it completes the other work and is signalled that our background task is complete. It pops the return address off the list and jumps to it, continuing the function call exactly where it left off as though nothing happened.
。业内人士推荐PDF资料作为进阶阅读
Иран поразил нефтяной танкер под флагом США у берегов Кувейта14:49，这一点在PDF资料中也有详细论述
记者跟乘客们聊着家常，一个半小时车程很快过去。旅程在双凤桥枢纽站结束，大家鱼贯下车，无缝换乘单轨。司机石代维也走下驾驶座，痛快地伸了伸腰。