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digitalmars.D.learn - Why does this work?

reply "Joey Peters" <squirrel nidhogg.com> writes:
Why does:

int myLength(char[] test) {
  return test.length;
}
char[] test = "hello";
test.myLength();

work, and not:

class foo {
  char[] d;
  this(char[] t) { d = t; }
}
viod myPrint(foo test) {
  printf("%.*s", test.d);
}
foo test = new test("hello");
test.myPrint();

? Is it just predefined for all the basic types, just arrays, or what? 
Mar 21 2005
parent "Regan Heath" <regan netwin.co.nz> writes:
On Mon, 21 Mar 2005 11:42:00 +0100, Joey Peters <squirrel nidhogg.com>  
wrote:
 Why does:

 int myLength(char[] test) {
   return test.length;
 }
 char[] test = "hello";
 test.myLength();

 work, and not:

 class foo {
   char[] d;
   this(char[] t) { d = t; }
 }
 viod myPrint(foo test) {
   printf("%.*s", test.d);
 }
 foo test = new test("hello");
 test.myPrint();

 ? Is it just predefined for all the basic types, just arrays, or what?

At the moment it only works for arrays. int[],char[],etc I would like to see it work for basic types also. int,long,float,etc. Perhaps even for struct/union/class, though it would need to detect collissions eg. class A { void foo(){} } void foo(A a) {} A a = new A(); a.foo(); //which one, the member or the stand-alone function? Regan
Mar 21 2005