forcing compile time function execution

[Artur Skawina]

On 12/27/11 19:29, Vladimir Panteleev wrote:
> On Tuesday, 27 December 2011 at 18:00:27 UTC, Artur Skawina wrote:
>> Is there a way to *force* CTFE? Without using an extra wrapper like this:
>>
>> auto f_impl(alias a)() { / * ... ctfeable ... */ }
>> auto f(alias a)() { enum ctfed = f_impl!a; return ctfed; }
>>
>> A "@compile" (or "@ctfe" etc) function attribute would eliminate the need for the wrapper...

Umm, the point was to *avoid* the extra useless wrapper. The only reason for its existence (and any kind of assignment to a static/enum) is to tell the compiler to try CTFE. Without the compile time assignment, it won't try hard enough - which means that, for f_impl()s that are not simple enough, code will be silently emitted and evaluated at runtime. Even when the functions are supposed to only do *compiletime* checking. (This happens eg. when /ctfeable/ contains loops)

Hence the "@compile" attribute suggestion, and list selection.

(I actually tried something similar to Now(), but that only obfuscates the code even more, for no gain)

artur