Meta-programming - examples

[Kirk McDonald]

janderson wrote:
> Andrei Alexandrescu (See Website For Email) wrote:
>> janderson wrote:
>>>
>>> ect...
>>>
>>>
>>> ");
>>> //Note that there should be a way to disable CheckCode in the general 
>>> case to save compile time
>>
>> I guess this is an obvious:
>>
>> mixin(CheckCode(import "program.d"));
> 
> Now that I think about it, what about:
> 
> version (CheckCode) { mixin(checkCode(__FILE__)) }
> 
> //Rest of file
> ...
> 
> checkCode would probably make use of static asserts.  Is it possible to 
> write a message to compiler output?  That would be a handy 
> static-compilation tool.
> 

There are two ways:

pragma(msg, "Compile-time output.");

And:

static assert(false, "Making the compiler die, now...");

> Or maybe it could be in the unit-tests.  Actually you can probably do 
> that in unit tests already even without mixin Expressions.
> 
> -Joel


-- 
Kirk McDonald
http://kirkmcdonald.blogspot.com
Pyd: Connecting D and Python
http://pyd.dsource.org