dmd 1.047 and 2.032 releases

bearophile bearophileHUGS at lycos.com
Fri Sep 4 06:01:15 PDT 2009


Don:

>CTFE is almost completely isolated from the rest of the compiler: it can't break anything that's  not CTFE.<

It's like having a compiler plus a D1 interpreter. In theory this duplication looks silly, in practice it seems handy.


>It is likely, for example, that unions will need to be disallowed in CTFE,<

Can you tell me why?


>but there's absolutely no reason why 'new' expressions should be disallowed.<

There's a compiler for a small language (designed for embedded CPUs) that allows to allocate objects at compile time (it also compacts their fields in smart ways, grouping fields of similar type from more than one object in a transversal way into arrays of single fields, and compacting pointers reducing their size, to save memory and speed up programs a little), and then at runtime the memory can't be allocated dynamically. D can do something similar, allocating such compile-time objects. It may save running time. I'd like to know what people think about this.

Bye,
bearophile


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