Assert

[Don Clugston]

David B. Held wrote:
> Lutger wrote:
>> [...]
>> Not impossible, but ugly:
>>
>> char[] enforce(char[] cond, char[] msg)
>> {
>>     return "if (!(" ~ cond ~ "))
>>             throw new Exception(\"" ~ cond ~ ": " ~ msg ~ "\");";
>> }
>>
>> mixin(enforce("ptr != null", "foo() failed"));
> 
> Well, "stringizing by hand" isn't exactly in the repertoire of 
> possibility that I was considering, given that we can write any code we 
> want in a mixin statement.  Clearly, this kind of solution is less than 
> ideal.

Yes, but it's really only syntactic sugar that's lacking. The functionality is 
almost identical to what you'd want from a macro. We're _so_ close.


> 
> Dave