http://d.puremagic.com/issues/show_bug.cgi?id=7135
Andrei Alexandrescu <and...@metalanguage.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #6 from Andrei Alexandrescu <and...@metalanguage.com> 2011-12-31
08:43:40 PST ---
OK, it looks like this is safe to close now. I compiled a slightly modified
version. There was a bug elsewhere, the line
Variant opDispatch(string m, Args)(Args args...) {
should be
Variant opDispatch(string m, Args...)(Args args) {
Also, the signature of the delegate should contain "...", i.e. replace
delegate Variant(Dynamic, Variant[]) {
with
delegate Variant(Dynamic, Variant[]...) {
The working code is:
module test;// Context begin
#line 1369 "0900-operators.tex"
import std.variant;
alias Variant delegate(Dynamic self, Variant[] args...) DynMethod;
// Context end
// Context begin
#line 1383 "0900-operators.tex"
class Dynamic {
private DynMethod[string] methods;
void addMethod(string name, DynMethod m) {
methods[name] = m;
}
void removeMethod(string name) {
methods.remove(name);
}
// Dispatch dynamically on method
Variant call(string methodName, Variant[] args...) {
return methods[methodName](this, args);
}
// Provide syntactic sugar with opDispatch
Variant opDispatch(string m, Args...)(Args args) {
Variant[] packedArgs = new Variant[args.length];
foreach (i, arg; args) {
packedArgs[i] = Variant(arg);
}
return call(m, args);
}
}
// Context end
#line 1409 "0900-operators.tex"
unittest {
import std.stdio;
auto obj = new Dynamic;
obj.addMethod("sayHello",
delegate Variant(Dynamic, Variant[]...) {
writeln("Hello, world!");
return Variant();
});
obj.sayHello(); // Prints "Hello, world!"
}
void main(){}
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