@porperty problem..
Hi I have a forward reference pb in conjunction with @property.
Err msg is :
forward refrence to inferred return type of function call s1.servername.
any ideas ? beside, where are the @property docs ?
thanks, bjoern
final class LoadBalancer {
private static LoadBalancer lb;
private Server[] servers;
static this() {
synchronized lb = new LoadBalancer;
}
private this() {
Server s1 = new Server();
s1.servername = Server 1; // ERROR
servers ~= s1;
}
public static LoadBalancer getLoadBalancer() {
return lb;
}
@property nextServer() {
return servers[0];
}
class Server {
private string _name, _id;
@property servername(string name) {
_name = name;
}
@property servername() {
return _name;
}
}
}
Re: @porperty problem..
On Mon, 28 Jun 2010 16:37:06 -0400, BLS windev...@hotmail.de wrote:
Hi I have a forward reference pb in conjunction with @property.
Err msg is :
forward refrence to inferred return type of function call s1.servername.
any ideas ? beside, where are the @property docs ?
thanks, bjoern
final class LoadBalancer {
private static LoadBalancer lb;
private Server[] servers;
static this() {
synchronized lb = new LoadBalancer;
}
private this() {
Server s1 = new Server();
s1.servername = Server 1; // ERROR
servers ~= s1;
}
public static LoadBalancer getLoadBalancer() {
return lb;
}
@property nextServer() {
Shouldn't this be
@property Server nextServer() {
???
return servers[0];
}
class Server {
private string _name, _id;
@property servername(string name) {
_name = name;
}
@property servername() {
return _name;
}
}
}
-Steve
Re: @porperty problem..
On Mon, 28 Jun 2010 22:37:06 +0200, BLS windev...@hotmail.de wrote:
Hi I have a forward reference pb in conjunction with @property.
Err msg is :
forward refrence to inferred return type of function call s1.servername.
any ideas ? beside, where are the @property docs ?
thanks, bjoern
final class LoadBalancer {
private static LoadBalancer lb;
private Server[] servers;
static this() {
synchronized lb = new LoadBalancer;
}
private this() {
Server s1 = new Server();
s1.servername = Server 1; // ERROR
servers ~= s1;
}
public static LoadBalancer getLoadBalancer() {
return lb;
}
@property nextServer() {
return servers[0];
}
class Server {
private string _name, _id;
@property servername(string name) {
_name = name;
}
@property servername() {
return _name;
}
}
}
Only place I've seen @property docs is in TDPL
Re: @porperty problem..
On 06/28/2010 03:47 PM, Steven Schveighoffer wrote:
On Mon, 28 Jun 2010 16:37:06 -0400, BLS windev...@hotmail.de wrote:
@property nextServer() {
Shouldn't this be
@property Server nextServer() {
???
auto functions?
Re: @porperty problem..
On Mon, 28 Jun 2010 16:55:01 -0400, Ellery Newcomer
ellery-newco...@utulsa.edu wrote:
On 06/28/2010 03:47 PM, Steven Schveighoffer wrote:
On Mon, 28 Jun 2010 16:37:06 -0400, BLS windev...@hotmail.de wrote:
@property nextServer() {
Shouldn't this be
@property Server nextServer() {
???
auto functions?
I wasn't aware that @property implies auto. I guess that makes sense, but
I didn't consider it anything but a hint to the compiler about how it
could be called, not that did anything with the type.
But I guess it's similar to static...
-Steve
Re: @porperty problem..
On 28/06/2010 22:47, Steven Schveighoffer wrote:
houldn't this be
@property Server nextServer() {
Ouch, you are right.. Interesting enough that @property nextServer() {
return ...} compiles without giving any error message..
Anyway it seems to be a forward reference bug. moving the inner Server()
class in front of LoadBalancer eliminates the error msg.
bjoern
Re: @porperty problem..
On Mon, 28 Jun 2010 16:55:44 -0400, Rory McGuire rmcgu...@neonova.co.za wrote: On Mon, 28 Jun 2010 22:37:06 +0200, BLS windev...@hotmail.de wrote: beside, where are the @property docs ? Only place I've seen @property docs is in TDPL http://www.digitalmars.com/d/2.0/function.html#property-functions -Steve
Re: @porperty problem..
On 06/28/2010 03:58 PM, Steven Schveighoffer wrote:
On Mon, 28 Jun 2010 16:55:01 -0400, Ellery Newcomer
ellery-newco...@utulsa.edu wrote:
On 06/28/2010 03:47 PM, Steven Schveighoffer wrote:
On Mon, 28 Jun 2010 16:37:06 -0400, BLS windev...@hotmail.de wrote:
@property nextServer() {
Shouldn't this be
@property Server nextServer() {
???
auto functions?
I wasn't aware that @property implies auto. I guess that makes sense,
but I didn't consider it anything but a hint to the compiler about how
it could be called, not that did anything with the type.
But I guess it's similar to static...
-Steve
There are a bunch of modifiers that do.
protection modifiers and maybe align and a few others don't, but pretty
much everything else does
Re: @porperty problem..
On 28/06/2010 22:58, Steven Schveighoffer wrote:
I wasn't aware that @property implies auto. I guess that makes sense,
but I didn't consider it anything but a hint to the compiler about how
it could be called, not that did anything with the type.
Hm, this snippet does not compile :
class Server {
private string _name, _id;
@property servername(string name) {
_name = name;
}
@property string servername() {
return _name;
}
}
remove string from @property and it works.
On the other hand ..
@property Server nextServer() {
return servers[0];
}
compiles fine !
Guess we need the official documents...
Bjoern
Re: @porperty problem..
On 28/06/2010 23:00, Steven Schveighoffer wrote: http://www.digitalmars.com/d/2.0/function.html#property-functions -Steve Makes sense :) thanks
Re: @porperty problem..
BLS windev...@hotmail.de wrote:
Hm, this snippet does not compile :
class Server {
private string _name, _id;
@property servername(string name) {
_name = name;
}
@property string servername() {
return _name;
}
}
remove string from @property and it works.
Maybe it's because you haven't added string to the setter? Just grasping
at straws here.
--
Simen
Re: @porperty problem..
On 29/06/2010 00:07, Simen kjaeraas wrote:
Maybe it's because you haven't added string to the setter? Just grasping
at straws here.
--
Simen
Hi Simen, yes, thats the prob. I just have not found the @property
docs.. thanks for all the help..
This snippet works now as expected.. D properties are just fine.
Bjoern
import std.stdio;
import std.random;
void main(string[] args)
{
LoadBalancer b1 = LoadBalancer.getLoadBalancer();
LoadBalancer b2 = LoadBalancer.getLoadBalancer();
LoadBalancer b3 = LoadBalancer.getLoadBalancer();
// Confirm these are the same instance
if (b1 == b2 b2 == b3 ) {
writeln(Same instance\n);
}
// Next, load 15 requests for a server
for (int i = 0; i 15; i++) {
string serverName = b1.nextServer.servername;
writeln(Dispatch request to: ~ serverName);
}
}
// D2 thread safe ?? singleton
final class LoadBalancer {
private static LoadBalancer lb;
private Server[] servers;
static this() {
synchronized lb = new LoadBalancer;
}
private this() {
Server s1 = new Server();
s1.servername = Server 1;
s1.id = ;
Server s2 = new Server();
s2.servername = Server 2;
servers ~= s1;
servers ~= s2;
}
public static LoadBalancer getLoadBalancer() {
return lb;
}
@property
{
Server nextServer() { return servers[ uniform(0,
servers.length) ]; }
}
// inner class
class Server {
private string _name, _id;
@property
{
string servername(string sn) { return _name = sn; }
string servername() { return _name; }
string id(string id) { return _id = id; }
string id() { return _id; }
}
}
}
