TSalm wrote: > >> I'm trying to build function which have the hability to convert a type >> to void* and from void*.
First of all, I have to ask: have you looked at std.variant / tango.core.Variant? >> I must use "ref" in the "toPtr" function because of this : >> http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=digitalmars.D.learn&artnum=15600 >> >> >> Do you think that what I done is correct ? >> >> >> /* --------- CODE --------- */ >> >> /*** >> * Convert a value to a void* >> * Params: >> * val = >> * Returns: >> */ >> void* toPtr(T)(ref T val) >> { >> void* p ; >> >> static if ( is( T b : Type ) ) What is this test doing? You're checking to see if T can be implicitly cast to "Type"... but "Type" isn't defined. And what is 'b' doing there? >> { >> p = new T ; >> p = &val ; You never use the freshly-allocated T. You assign it to p and then immediately overwrite it with &val. >> } >> else >> { >> p = &val ; >> } >> >> return p ; >> } So the function is basically doing this: T fromPtr(T)(ref T val) { return &val; } >> /*** >> * Convert a void* to his value >> * Params: >> * ptr = >> * Returns: >> */ >> T fromPtr(T)(void* ptr) >> { >> return *(cast(T*)ptr) ; >> } >> /* ------- END CODE -------- */ >> > > I've forget to say that toPtr can't be call with constants. I get the distinct impression that you're seriously over-thinking this. Both of these functions could be rewritten as casts. Aside from that, you've given no context for me to have any idea what you're trying to accomplish here. -- Daniel
