newbie problem with nothrow

[Kapps via Digitalmars-d-learn]

On Monday, 31 October 2016 at 17:04:28 UTC, Temtaime wrote:
> On Monday, 31 October 2016 at 16:55:51 UTC, WhatMeWorry wrote:
>>
>> Is there a way to turn off nothrow or work around it? Because 
>> to me it looks like nothrow prevents me from doing anything 
>> useful.
>>
>> extern(C) void onKeyEvent(GLFWwindow* window, int key, int 
>> scancode, int action, int modifier) nothrow
>> {
>>     if(queue.roomInQueue())
>>     {
>>         auto event = new Event;
>>         event.type = EventType.keyboard;
>>         event.keyboard.key = cast(Key) key;
>>
>>         // etc.
>> }
>>
>> Error: function 'event_handler.CircularQueue.roomInQueue' is 
>> not nothrow
>> Error: function 'event_handler.onKeyEvent' is nothrow yet may 
>> throw
>>
>>
>> The compiler wouldn't let me just remove "nothrow" from the 
>> function. I tried a kludge where I had this function just pass 
>> all its parameters to another throwable function, but this 
>> caused errors as well.
>>
>> So I'm stuck.  Anyone know how to proceed.
>> Thanks.
>
> Wrap a body of the function to try {} catch {} and it'll work.

Assuming you're sure it'll never throw. To enforce this, use try 
{ } catch { throw new Error("blah"); }. You can still throw 
errors, just not exceptions (as errors are not meant to be 
caught).