• Matthias Walter <xammy xammy.homelinux.net> Feb 06 2012
• Timon Gehr <timon.gehr gmx.ch> Feb 06 2012
• "Daniel Murphy" <yebblies nospamgmail.com> Feb 06 2012

Matthias Walter <xammy xammy.homelinux.net> writes:

Hi,

I'd like to have a function foo which shall depend on several
compile-time expressions (e.g. strings) and gets several arguments whose
types are templatized. Here, "several" means in both cases that the
number of expressions/arguments are to be determined at compile-time.
Here is an example:

foo!("a", "b", c")(42, new MyClass(), 7.0);

At compile-time, some template parameters (strings "a", "b" and "c")
shall be given explicitly and some more template parameters (types of
arguments int, MyClass, double) shall be deduced from the function
arguments.

Is that possible? Of course, I cannot setup two TemplateTupleParameters.

Best regards,

Matthias

Timon Gehr <timon.gehr gmx.ch> writes:

On 02/06/2012 11:26 PM, Matthias Walter wrote:
 Hi,

 I'd like to have a function foo which shall depend on several
 compile-time expressions (e.g. strings) and gets several arguments whose
 types are templatized. Here, "several" means in both cases that the
 number of expressions/arguments are to be determined at compile-time.
 Here is an example:

 foo!("a", "b", c")(42, new MyClass(), 7.0);

 At compile-time, some template parameters (strings "a", "b" and "c")
 shall be given explicitly and some more template parameters (types of
 arguments int, MyClass, double) shall be deduced from the function
 arguments.

 Is that possible? Of course, I cannot setup two TemplateTupleParameters.

 Best regards,

 Matthias


This should do the job:

template foo(CompileTimeArgs...){
     auto foo(RuntimeArgTypes...)(RuntimeArgTypes args){ ... }
}

It requires explicit !() in case the CompileTimeArgs tuple is empty.

(If that is not what you want, introduce another overload of the 
template. Eventually, just having alias foo!() foo; will work too, but 
not currently, because of a compiler bug)

"Daniel Murphy" <yebblies nospamgmail.com> writes:

http://d.puremagic.com/issues/show_bug.cgi?id=2599

"Matthias Walter" <xammy xammy.homelinux.net> wrote in message 
news:mailman.71.1328567829.20196.digitalmars-d-learn puremagic.com...
 Hi,

 I'd like to have a function foo which shall depend on several
 compile-time expressions (e.g. strings) and gets several arguments whose
 types are templatized. Here, "several" means in both cases that the
 number of expressions/arguments are to be determined at compile-time.
 Here is an example:

 foo!("a", "b", c")(42, new MyClass(), 7.0);

 At compile-time, some template parameters (strings "a", "b" and "c")
 shall be given explicitly and some more template parameters (types of
 arguments int, MyClass, double) shall be deduced from the function
 arguments.

 Is that possible? Of course, I cannot setup two TemplateTupleParameters.

 Best regards,

 Matthias