• Sean Reque <seanthenewt yahoo.com> Jul 07 2008
• BCS <ao pathlink.com> Jul 07 2008

Sean Reque <seanthenewt yahoo.com> writes:

Jarrett Billingsley Wrote:

 "Sean Reque" <seanthenewt yahoo.com> wrote in message 
 news:g4tjei$31ci$1 digitalmars.com...
 Never mind, I wrote the function wrong. This actually works. Alpha 
 compilers have terrible error messages sometimes!

 import std.stdio;

 /* R is return type
 * A is first argument type
 * U is TypeTuple of rest of argument types
 */
 R delegate(U) Curry(R, A, U...)(R delegate(A, U) dg, A arg)
 {
  return delegate R(U args) { return dg(arg, args); };
 }

 void main()
 {
    int plus(int x, int y, int z)
    {
 return x + y + z;
    }

    auto plus_two = Curry(&plus, 2);
    writefln("%d", plus_two(6, 8)); // prints 16
 }


 Of course it works, plus is a delegate :)
 
 Now put "static" in front of the declaration of plus and watch it fail. 
 
 


Ohhhhh.. I thought you had to use the delegate keyword to make something a
delegate, or otherwise it was a function by default. Guess I need to read the
docs more carefully.

BCS <ao pathlink.com> writes:

Reply to Sean,


 Of course it works, plus is a delegate :)
 
 Now put "static" in front of the declaration of plus and watch it
 fail.
 


 something a delegate, or otherwise it was a function by default. Guess
 I need to read the docs more carefully.
 


Short test for delegate vs. fn ptr: If you can reference any non-static, 
non-global, non-local values, it will be a delegate.