• jspencer (35/35) Jun 15 2010 For some reason, I can't get this simple bind example to compile w/ dmd ...
• jspencer (22/22) Jun 16 2010 I talked to Tom Stachowiak, who couldn't spot anything wrong with the

jspencer <spencer8 sbcglobal.net> writes:

For some reason, I can't get this simple bind example to compile w/ dmd v2.046.
 Can anyone
spot what I'm missing?


---
import std.bind;
import std.stdio;

void g (int a, int b)
{
   int c = a + b;
}

void main()
{
   auto g1 = bind(&g, 3, 5);
   writeln(typeid(typeof(g1)));
}
---

gives me

---
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\traits.d(117): Error: static
assert
"argument has no parameters"
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\traits.d(102):       
instantiated from
here: ParameterTypeTuple!(EmptySlot,void)
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\traits.d(113):       
instantiated from
here: ParameterTypeTuple!(const(EmptySlot))
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\bind.d(977):        instantiated
from here:
ParameterTypeTuple!(const(EmptySlot)*)
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\bind.d(1003):       
instantiated from here:
FuncReferenceParamsAsPointers_impl!(NullAlias)
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\bind.d(338):        instantiated
from here:
FuncReferenceParamsAsPointers!(NullAlias)
C:\tools\dmd2\windows\bin\..\..\src\phobos\std\bind.d(660):        instantiated
from here:
BoundFunc!(void function(int a, int b),NullAlias,Tuple!(int,int))
bTest.d(12):        instantiated from here: bind!(void function(int a, int
b),int,int)

---
Thanks,
Jason

jspencer <spencer8 sbcglobal.net> writes:

I talked to Tom Stachowiak, who couldn't spot anything wrong with the
code.  I believe this is a bug in std.bind (or maybe std.traits.)  Has
anyone else seen this?

With 2.047:
----
import std.bind;
import std.stdio;

void g (int a, int b)
{
   int c = a + b;
}

void main()
{
   auto g1 = bind(&g, _0, _0);
   writeln(typeid(typeof(g1)));
}
---

gives


C:\tools\dmd2\windows\bin\..\..\src\phobos\std\bind.d(977): Error:
template instance ParameterTypeTuple!(const(EmptySlot)*) does not
match template declaration ParameterTypeTuple(dg...) if (dg.length ==
1 && isCallable!(dg))