On Mon, 24 Jan 2011 10:45:03 -0500, Andrej Mitrovic wrote:
Is this a bug?
import std.stdio;
string[string] values = [abc:abc, def:def];
void main()
{
string[string] values2 = [abc:abc, def:def];
}
test.d(3): Error: non-constant expression [abc:abc,def:def]
What's
Instead of mixing in type by type, is there a way to mixin a Type Tuple?
Some foreach Type mixin;
Otherwise, I guess recursive templated inheritance with a single mixin
at each level should to the trick?
Thanks,
Nick
On 01/25/2011 08:54 AM, bearophile wrote:
Andrej Mitrovic:
It's interesting that enum works but immutable doesn't. enum will do, Thanks.
But there are some problems with enum AAs. Take a look at this little program:
enum int[int] aa = [1:2, 3:4];
int foo(int x) {
return aa[x];
}
void
On 01/25/2011 09:13 AM, Lars T. Kyllingstad wrote:
On Mon, 24 Jan 2011 10:45:03 -0500, Andrej Mitrovic wrote:
Is this a bug?
import std.stdio;
string[string] values = [abc:abc, def:def];
void main()
{
string[string] values2 = [abc:abc, def:def];
}
test.d(3): Error: non-constant
On Mon, 24 Jan 2011 18:39:39 -0500, Simen kjaeraas
simen.kja...@gmail.com wrote:
Ellery Newcomer ellery-newco...@utulsa.edu wrote:
in the following:
void main(){
char[] x;
string s;
string y;
y = s ~ x;
}
tok.d(5): Error: cannot implicitly convert expression
Hello,
This post is about the various roles D templates can play. I had to write a
higher-order function (hof) that takes as parameter a func which itself returns
any kind of type. Thus, the hof is also templated. (Below the simplest case I
could find as example.)
Unlike in functional
Why do they exist and why does typeof(this) strip constness?
import std.stdio;
struct S
{
const void foo(this T)(int i)
{
writeln(typeid(T));
}
const void bar()
{
writeln(typeid(typeof(this)));
}
}
void main()
{
const(S) s;
(s).foo(1);
S s2;
On Tue, 25 Jan 2011 10:21:29 -0500, spir denis.s...@gmail.com wrote:
Hello,
This post is about the various roles D templates can play. I had to
write a higher-order function (hof) that takes as parameter a func which
itself returns any kind of type. Thus, the hof is also templated. (Below
2. What is the reason for Phobos defining param funcs as template
params?
Correct me if I'm wrong but there's no way to pass an arbitrary
function to a function in a type-safe way. If you use pointers and
casts you can't check if the passed function meets certain
requirements (parameters, return
Trass3r u...@known.com wrote:
Why do they exist and why does typeof(this) strip constness?
Template this parameters allow for covariant return types, that's about
all the use cases I've found for it. It seems like such a great thing,
almost doing automatic overriding of methods in subclasses,
On Tue, 25 Jan 2011 10:44:23 -0500, Trass3r u...@known.com wrote:
Why do they exist
It tells you the exact type of this at the call site. For const struct
functions, this will tell you what the actual constness of the variable
is. For classes, this may give you the derived or base class
On Tue, 25 Jan 2011 10:58:18 -0500, Steven Schveighoffer
schvei...@yahoo.com wrote:
That seems like a bug, but actually, I'd not trust typeid. typeid is
actually a runtime-defined TypeInfo class, which you are calling
toString on, which is not telling you exactly what the compiler thinks
Trass3r Wrote:
2. What is the reason for Phobos defining param funcs as template
params?
Correct me if I'm wrong but there's no way to pass an arbitrary
function to a function in a type-safe way. If you use pointers and
casts you can't check if the passed function meets certain
Trass3r u...@known.com wrote:
2. What is the reason for Phobos defining param funcs as template
params?
Correct me if I'm wrong but there's no way to pass an arbitrary
function to a function in a type-safe way. If you use pointers and
casts you can't check if the passed function meets certain
On 01/25/2011 06:03 PM, Simen kjaeraas wrote:
Of course, given a non-template function, it is impossible to safely
pass a function to it.
Dont you count this as typesafe function passing?
void writeRounding (int function (float) roundingScheme) {...}
Denis
--
_
vita
How do you not pass them in a safe manner? If you are casting things,
of course you don't get type safety.
Yep, I was talking about non-template functions.
Only way to pass an arbitrary function is via void*
I can't seem to find something like that in phobos.
Is it missing or am I overlooking it?
I don't think there are any, searching for GetProcAddress only returns
loader.d which seems to be an old module for loading executables but
probably unrelated to DLLs (?).
There's dll_helper.d in druntime\src\core\ but it only has some TLS
workaround features.
I've found some good solutions for
On Mon, 24 Jan 2011 14:39:33 -0500, Simen kjaeraas
simen.kja...@gmail.com wrote:
pragma the_ignora...@hotmail.com wrote:
Hi i come from a c# background
I would like to write the following code in the according D style but
i'm not
sure howto do it
c# code:
void foo(IEnumerabledouble[]
Hi,
Not a question but just raising a concern i am facing again and again. The
current implementation of interfaces seem to be creating a number of problems.
I am not able to:
- find indexOf interface in an interface range using std.algorithm.
- compare interface objects
- assign interface to
Mandeep Singh Brar Wrote:
How about simply saying:
void foo(double[] data)
{
foreach (d; data)
{
do_some_stuff(d);
}
}
all ranges are already foreachable.
Regards
Mandeep
He is iterating over a range/iterable of double[], Simen got the type check
wrong, which I
spir Wrote:
On 01/25/2011 06:03 PM, Simen kjaeraas wrote:
Of course, given a non-template function, it is impossible to safely
pass a function to it.
Dont you count this as typesafe function passing?
void writeRounding (int function (float) roundingScheme) {...}
He means
Hello,
Cannot find corresponding opSomething method, if any. (opDispatch seems to
specialise for method call.)
Else, how to catch obj.member?
Denis
--
_
vita es estrany
spir.wikidot.com
Mandeep Singh Brar:
I am not able to:
- find indexOf interface in an interface range using std.algorithm.
I don't understand. Please explain better.
- compare interface objects
What kind of comparisons do you need to perform and why?
- assign interface to generic objects.
Why do you
On Tuesday, January 25, 2011 11:33:24 spir wrote:
Hello,
Cannot find corresponding opSomething method, if any. (opDispatch seems to
specialise for method call.)
Else, how to catch obj.member?
You're trying to override a member variable? Or are you trying to override the
dot operator? You
On Tue, Jan 25, 2011 at 12:33, Nick n...@example.com wrote:
Instead of mixing in type by type, is there a way to mixin a Type Tuple?
Some foreach Type mixin;
Otherwise, I guess recursive templated inheritance with a single mixin at
each level should to the trick?
Could you give an example of
spir denis.s...@gmail.com wrote:
Hello,
Cannot find corresponding opSomething method, if any. (opDispatch seems
to specialise for method call.)
Else, how to catch obj.member?
opDispatch is likely what you want. with the @property annotation, it
will readily support obj.member; and
On Tue, 25 Jan 2011 15:44:59 -0500, vnm gre...@tut.by wrote:
Why gdb can't show line information and why it shows symbols in mangled
form ? Is this software issues or I'm doing something wrong ?
AFAIK, gdb 7.2 integrated some patch for D support (including symbols
demangling feature). This
spir denis.s...@gmail.com wrote:
On 01/25/2011 10:29 PM, Simen kjaeraas wrote:
spir denis.s...@gmail.com wrote:
Hello,
Cannot find corresponding opSomething method, if any. (opDispatch
seems to
specialise for method call.)
Else, how to catch obj.member?
opDispatch is likely what you
Mandeep Singh Brar:
I am not able to:
- find indexOf interface in an interface range using std.algorithm.
I don't understand. Please explain better.
In the following snippet:
Interface interfaceA{}
class C:interfaceA{}
class D:interfaceA{}
interfaceA[] registry;
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