Re: try & catch / repeating code - DRY

[Robert M. Münch via Digitalmars-d-learn]

On 2018-05-22 18:33:06 +0000, Jacob Carlborg said:

You can always create a function that takes a delegate or lambda and 
handles the exception in the function. Here are three versions of the 
same thing, depending on how you want the call site to look like.

Hi, great! Thanks for the examples... BTW: Is there a place where such 
generic and fundamental examples are collected?

void handleException1(alias dg)()
{
     try dg();
     catch (Exception e) { /* handle exception */ }
}

void handleException2(lazy void dg)
{
     try dg();
     catch (Exception e) { /* handle exception */ }
}

void handleException3(scope void delegate () dg)
{
     try dg();
     catch (Exception e) { /* handle exception */ }
}

void main()
{
     handleException1!({
         writeln("asd");
     });

     handleException1!(() => writeln("asd"));

     handleException2(writeln("asd"));

     handleException3({
         writeln("asd");
     });
}

What is exactly the difference between handleException1 and 3?

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Robert M. Münch
http://www.saphirion.com
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