Const initialization issue, looking for solution

[Jonathan M Davis]

On Wednesday, May 29, 2013 14:36:18 Jakob Ovrum wrote:
> Consider the following example:
> 
> http://dpaste.dzfl.pl/a0595ddf
> ----
> // Can throw, and we want to catch
> int createTheVar();
> 
> // Can also throw, but we don't want to catch it here
> int transform(int a);
> 
> int foo()
> {
> const(int) i;
> 
> try
> {
> i = createTheVar(); // Clearly not allowed
> }
> catch(Exception e) // For demo purposes
> {
> // Exception handling code
> }
> 
> return transform(i);
> }
> ----

Wrap the try-catch in a function.

int foo()
{
 int initI()
 {
 try
 return createTheVar();
 catch(Exception e)
 return int.init;
 }

 const int i = initI();

 return transform(i);
}

And as it's a nested function, you can even have access to foo's scope (or 
make it static if you don't need that).

- Jonathan M Davis