Re: "Symbol undefined" on interface with public getter and package setter
TSalm wrote: >> >> I'm not sure but I think package is not virtual. > > :-( > So there's really no way to have a method declared "package" in an > interface ? You also can't have a private function in an interface. This once lost me four days trying to figure out why my program wouldn't link despite the function very obviously being there. Stick to public functions only. -- Daniel
Re: Making pure functions get dirty (D 2.0)
Oh I see what's going on. pure functions get funky processing; if you don't actually use their return values they're not even compiled. Once you actually take the return value it'll complain about it whether it's a pure inner function in a pure outer function or anything else unless if it's a pure outer function which is perhaps the most useless thing you could have in this context.
Making pure functions get dirty (D 2.0)
I'm writing a general conversion template function a la:
pure T convert (T, U) (const (U) value);
Sweet, and really handy for template errors because you can tell the user which
number input it is that angered it. The problem is that if you're converting
int to string there's allocations there that doesn't have to be there for many
purposes (also I'm using it for error formatting, which isn't so good if what
I'm telling the user is that there's no memory for allocations). So I thought
I'd make it work like this:
// May call write multiple times for arrays, each time builds onto the array.
void convertInto (T, U, alias write) (const (T) value)
{
write ("You've bespoiled my honour, cur!\n");
}
void convertWith (T, U) (const (U) value, void delegate (T) write)
{
convertInto! (T, U, write) (value);
}
import std.stdio;
void main ()
{
void write (string text) { writef (text); }
convertWith! (string, string) ("Let's you and I spend a few moments alone
without a chaperone, baby.\n", &write);
}
Strangely enough this compiles but it doesn't actually DO anything (everything
works, it's just that convertInto is not called at all); just taking the pure
off fixes it. Obviously it shouldn't work, but what would I do to make an
conditionally-pure function like this without code replication or mixin madness?
It feels like I'm missing some kind of "third way".
Re: Making pure functions get dirty (D 2.0)
Burton Radons Wrote: > void convertInto (T, U, alias write) (const (T) value) This should read "pure void". Everything I said about its behaviour is correct for my experiences.
Re: "Symbol undefined" on interface with public getter and package setter
I'm not sure but I think package is not virtual. :-( So there's really no way to have a method declared "package" in an interface ?
Re: "Symbol undefined" on interface with public getter and package setter
TSalm wrote:
Hello,
When I compile the code below, I've got the following error :
OPTLINK (R) for Win32 Release 8.00.1
Copyright (C) Digital Mars 1989-2004 All rights reserved.
private_method_in_interface_file3.obj(private_method_in_interface_file3)
Error 42: Symbol Undefined
_D33private_method_in_interface_file31I4funcMFiZv
--- errorlevel 1
/* - CODE -- */
interface I
{
int func() ;
package void func(int);
}
class A:I
{
int i;
package void func(int i)
{ this.i = i; }
int func()
{ return i; }
}
void main()
{
I a = new A ;
a.func = 10 ;
Stdout(a.func).newline ;
}
/* --- END CODE */
Thanks in advance for your help,
TSalm
I'm not sure but I think package is not virtual.
Re: "Symbol undefined" on interface with public getter and package setter
On Fri, Feb 20, 2009 at 3:56 PM, Jacob Carlborg wrote: > > I'm not sure but I think package is not virtual. > The compiler should catch that then.
Re: "Symbol undefined" on interface with public getter and package setter
It seems this comes only from the "package" method.
The error is the same with this code :
/* --- CODE --- */
interface I
{
package void setFunc(int);
}
class A:I
{
int i;
package void setFunc(int i)
{ this.i = i ; }
}
void main()
{
I a = new A;
a.setFunc = 10;
}
/* --- END CODE --- */
Hello,
When I compile the code below, I've got the following error :
OPTLINK (R) for Win32 Release 8.00.1
Copyright (C) Digital Mars 1989-2004 All rights reserved.
private_method_in_interface_file3.obj(private_method_in_interface_file3)
Error 42: Symbol Undefined
_D33private_method_in_interface_file31I4funcMFiZv
--- errorlevel 1
/* - CODE -- */
interface I
{
int func() ;
package void func(int);
}
class A:I
{
int i;
package void func(int i)
{ this.i = i; }
int func()
{ return i; }
}
void main()
{
I a = new A ;
a.func = 10 ;
Stdout(a.func).newline ;
}
/* --- END CODE */
Thanks in advance for your help,
TSalm
"Symbol undefined" on interface with public getter and package setter
Hello,
When I compile the code below, I've got the following error :
OPTLINK (R) for Win32 Release 8.00.1
Copyright (C) Digital Mars 1989-2004 All rights reserved.
private_method_in_interface_file3.obj(private_method_in_interface_file3)
Error 42: Symbol Undefined
_D33private_method_in_interface_file31I4funcMFiZv
--- errorlevel 1
/* - CODE -- */
interface I
{
int func() ;
package void func(int);
}
class A:I
{
int i;
package void func(int i)
{ this.i = i; }
int func()
{ return i; }
}
void main()
{
I a = new A ;
a.func = 10 ;
Stdout(a.func).newline ;
}
/* --- END CODE */
Thanks in advance for your help,
TSalm
