• hellcatv hotmail.com (14/14) May 06 2004 It is critical to be able to instantiate a class with different template
• Ivan Senji (19/33) May 06 2004 single
• hellcatv hotmail.com (2/38) May 06 2004

hellcatv hotmail.com writes:

It is critical to be able to instantiate a class with different template
argumetns to be able to do a cast function (i.e. a double vector to a single
vector) or in this case to be able to make a smaller vector from a bigger one.
Doing this with static functions outside the class is painful and the syntax is
clunky (no operators, no implicit members that actually call get/set functions).
test program that fails:

struct vec(int size) {
float v[size];
vec!(1) first() {vec!(1) t; t.v[0]=v[0];return t;}
}
int main () {
vec!(2) v;
vec!(1) g =v.first();

}

"Ivan Senji" <ivan.senji public.srce.hr> writes:

<hellcatv hotmail.com> wrote in message
news:c7ctkt$1all$1 digitaldaemon.com...
 It is critical to be able to instantiate a class with different template
 argumetns to be able to do a cast function (i.e. a double vector to a

single
 vector) or in this case to be able to make a smaller vector from a bigger

one.
 Doing this with static functions outside the class is painful and the

syntax is
 clunky (no operators, no implicit members that actually call get/set

functions).
 test program that fails:

 struct vec(int size) {
 float v[size];
 vec!(1) first() {vec!(1) t; t.v[0]=v[0];return t;}
 }
 int main () {
 vec!(2) v;
 vec!(1) g =v.first();

 }


There is no bug here, you missed something that isn't documented
(at least i didn't find it)
It should be:

struct vec(int size) {
float v[size];
.vec!(1) first() {.vec!(1) t; t.v[0]=v[0];return t;}
}
int main () {
vec!(2) v;
vec!(1) g =v.first();
return 1;
}

template vec belongs to global scope so . gives acces to global scope.

hellcatv hotmail.com writes:

D is my new favorite language :-) thanks

In article <c7d1kc$1gr1$1 digitaldaemon.com>, Ivan Senji says...
<hellcatv hotmail.com> wrote in message
news:c7ctkt$1all$1 digitaldaemon.com...
 It is critical to be able to instantiate a class with different template
 argumetns to be able to do a cast function (i.e. a double vector to a

single
 vector) or in this case to be able to make a smaller vector from a bigger

one.
 Doing this with static functions outside the class is painful and the

syntax is
 clunky (no operators, no implicit members that actually call get/set

functions).
 test program that fails:

 struct vec(int size) {
 float v[size];
 vec!(1) first() {vec!(1) t; t.v[0]=v[0];return t;}
 }
 int main () {
 vec!(2) v;
 vec!(1) g =v.first();

 }


There is no bug here, you missed something that isn't documented
(at least i didn't find it)
It should be:

struct vec(int size) {
float v[size];
.vec!(1) first() {.vec!(1) t; t.v[0]=v[0];return t;}
}
int main () {
vec!(2) v;
vec!(1) g =v.first();
return 1;
}

template vec belongs to global scope so . gives acces to global scope.