template F1(T)
{
void bar() { writeln("Bar0"); }
}
template F2(T)
{
mixin F1!T;
void foo() { bar(); }
}
template F3(T)
{
mixin F2!T;
void bar() { writeln("Bar1"); } // <- This bar should be used
for F2's foo!
}
struct F4(T)
{
mixin F3!T;
}
(Or on can turn F3 in to a
On Thursday, 11 August 2016 at 18:11:30 UTC, Engine Machine wrote:
I have the need, in some cases, to pass static information to a
template class but don't want it to affect its type.
import std.algorithm, core.stdc.stdlib;
struct X(int defaultSize = 100)
{
int Size;
int* p;
void
I have the need, in some cases, to pass static information to a
template class but don't want it to affect its type.
import std.algorithm, core.stdc.stdlib;
struct X(int defaultSize = 100)
{
int Size;
int* p;
void foo(int size)
{
Size = max(size, defaultSize);
p =
On Thursday, 11 August 2016 at 19:28:47 UTC, Lodovico Giaretta
wrote:
On Thursday, 11 August 2016 at 18:11:30 UTC, Engine Machine
wrote:
[...]
If, in your case, it is possible to use one type as the other,
then specify it.
I mean, implement a templated opAssign that allows you to
assign
Also, what if we use a class instead of a struct?
in this case they are both references to the same thing.
I see a problem with reflection though, as one could get the
template parameter value and it would wrong on conversion. D
takes the easy way out of just preventing complex and
On Thursday, 11 August 2016 at 19:05:58 UTC, sldkf wrote:
On Thursday, 11 August 2016 at 17:56:47 UTC, Engine Machine
wrote:
template F1(T)
{
void bar() { writeln("Bar0"); }
}
template F2(T)
{
mixin F1!T;
void foo() { bar(); }
}
template F3(T)
{
mixin F2!T;
void bar() {
On Thursday, 11 August 2016 at 18:42:51 UTC, Steven Schveighoffer
wrote:
On 8/11/16 2:11 PM, Engine Machine wrote:
I have the need, in some cases, to pass static information to
a template
class but don't want it to affect its type.
import std.algorithm, core.stdc.stdlib;
struct X(int
On Thursday, 11 August 2016 at 21:25:20 UTC, sldkf wrote:
On Thursday, 11 August 2016 at 20:27:01 UTC, Engine Machine
wrote:
This requires F2 to know the future. It also forces it to use
a specific bar. I want inheritance like logic.
You are goind to hit a wall. Template programming is not
On Thursday, 11 August 2016 at 21:03:36 UTC, Ali Çehreli wrote:
On 08/11/2016 01:27 PM, Engine Machine wrote:
> I see the mixin as a sort of copy and paste.
That's the case for string mixins. Template mixins bring a name
resolution scope. My understanding of the topic:
On Friday, 12 August 2016 at 23:48:54 UTC, sldkf wrote:
On Friday, 12 August 2016 at 23:14:23 UTC, Engine Machine wrote:
On Friday, 12 August 2016 at 15:35:50 UTC, sldkf wrote:
On Friday, 12 August 2016 at 02:09:21 UTC, Engine Machine
wrote:
On Thursday, 11 August 2016 at 21:25:20 UTC, sldkf
On Thursday, 11 August 2016 at 20:43:13 UTC, Meta wrote:
On Thursday, 11 August 2016 at 18:11:30 UTC, Engine Machine
wrote:
[...]
It can be done, but you have to be explicit and should think
very carefully if this is really a good design.
struct X(int defaultSize = 100)
{
int size;
On Friday, 12 August 2016 at 15:35:50 UTC, sldkf wrote:
On Friday, 12 August 2016 at 02:09:21 UTC, Engine Machine wrote:
On Thursday, 11 August 2016 at 21:25:20 UTC, sldkf wrote:
On Thursday, 11 August 2016 at 20:27:01 UTC, Engine Machine
issue solved using a "template this parameter":
auto ref foo(T, Args...)(args)
{
static if (hasStaticMember!(T, "foo"))
return T.foo!(T)(args);
}
Basically I want to forward the *static* call to T if possible(if
foo exists in T). The main problem is actually calling T.foo as
the syntax here doesn't work. I also need to be able
On Friday, 12 August 2016 at 18:23:55 UTC, Cauterite wrote:
Thanks colon-nazis, I'll take that into consideration ¬_¬
Be careful! They will cauterize your testicles and rape your
children! Those semi-clone, I mean semi-colon-nazis are the worse
kind! It's a life and death matter! After all,
On Friday, 12 August 2016 at 17:53:12 UTC, ag0aep6g wrote:
On 08/12/2016 07:33 PM, Cauterite wrote:
Why would I not terminate a declaration with a semi-colon?
Why should a declaration not end in a semi-colon just because
the last
token is a brace?
Why should I not tell the lexer precisely
On Saturday, 13 August 2016 at 18:42:50 UTC, Cauterite wrote:
On Saturday, 13 August 2016 at 18:34:43 UTC, Engine Machine
wrote:
static if (hasStaticMember!(T, "foo"))
Here I suspect you're looking for this:
__traits(isStaticFunction, __traits(getMember, T, "foo"))
Thanks.
It needs to
void foo(@nogc void delegate())
doesn't work.
But declaring an alias does, but too verbose. Surely we should be
able to add the attribute directly?
On Sunday, 7 August 2016 at 23:02:26 UTC, ag0aep6g wrote:
On 08/08/2016 12:08 AM, Engine Machine wrote:
On Sunday, 7 August 2016 at 20:48:29 UTC, ag0aep6g wrote:
[...]
Delegates don't necessarily need a GC allocation. They only
need it
when they need a closure. Delegates of methods don't need
This really makes no sense
Error: template Mem cannot deduce function from argument types
!(cast(eException)1280L, "main.d", 38u, "main.WinMain")(int),
candidates are:
Mem(T, B = eX, string file = __FILE__, uint line = __LINE__,
string func = __FUNCTION__)(size_t bytes)
Mem(T, B = eX, string
On Sunday, 7 August 2016 at 20:48:29 UTC, ag0aep6g wrote:
On 08/07/2016 10:01 PM, Engine Machine wrote:
@nogc void foo(void delegate(int x) @nogc f);
fails with the @nogc.
Compiles just fine for me.
2nd, I cannot use a delegate because of the @nogc context,
Delegates don't necessarily
I use callbacks a lot and have trouble with D in a nogc context.
First, I cannot declare the parameters with a nogc or I get a
compile time error.
@nogc void foo(void delegate(int x) @nogc f);
fails with the @nogc.
2nd, I cannot use a delegate because of the @nogc context,
@nogc void
I try to use a mixin template and redefine some behaviors but D
includes both and then I get ambiguity. I was sure I read
somewhere that when one uses mixin template it won't include what
is already there?
mixin template X
{
void foo() { }
}
struct s
{
mixin template
void foo() { }
alias x = AliasSeq!(a, b, AliasSeq!(c, d));
results in a flat sequence. I would like to be able to keep them
separate so I can have sub sequences.
x.length == 4;
On Tuesday, 16 August 2016 at 17:39:14 UTC, Lodovico Giaretta
wrote:
On Monday, 15 August 2016 at 19:31:14 UTC, Engine Machine wrote:
Suppose I have a templated type like
struct S(T) { int x; static if (T is Y) int y; }
I would like to be able to create a reference to S(T) for any
T,
On Tuesday, 16 August 2016 at 15:56:18 UTC, Adam D. Ruppe wrote:
On Tuesday, 16 August 2016 at 15:40:19 UTC, Engine Machine
wrote:
How can I actually store this data for runtime use that
doesn't require the GC?
The indexing set is fixed at compile time.
Just create an ordinary struct...
On Monday, 15 August 2016 at 19:40:37 UTC, Steven Schveighoffer
wrote:
On 8/15/16 3:31 PM, Engine Machine wrote:
Suppose I have a templated type like
struct S(T) { int x; static if (T is Y) int y; }
I would like to be able to create a reference to S(T) for any
T,
struct Q
{
S!* s; // Can
Suppose I have a templated type like
struct S(T) { int x; static if (T is Y) int y; }
I would like to be able to create a reference to S(T) for any T,
struct Q
{
S!* s; // Can hold any type of S.
}
and be able to access s.x, since it is common to all S.
Can D do anything like this? It is
On Wednesday, 17 August 2016 at 08:37:32 UTC, Lodovico Giaretta
wrote:
On Tuesday, 16 August 2016 at 23:18:28 UTC, Adam D. Ruppe wrote:
On Tuesday, 16 August 2016 at 19:17:27 UTC, Engine Machine
wrote:
alias x = AliasSeq!(a, b, AliasSeq!(c, d));
results in a flat sequence. I would like to be
I have a template that is suppose to create a type based on a
template parameter
static if (T == "int")
{
auto x = New!int();
}
else static if (T == "double")
{
auto x = New!double();
}
x = 1.234;
This is just an example, I use custom types.
The static if's prevent x's scope from
On Sunday, 21 August 2016 at 06:28:25 UTC, Jack Applegame wrote:
On Sunday, 21 August 2016 at 00:06:07 UTC, Engine Machine wrote:
On Saturday, 20 August 2016 at 22:21:00 UTC, ag0aep6g wrote:
On 08/21/2016 12:11 AM, Engine Machine wrote:
Is there a way to rebind the arguments of a template?
On Sunday, 21 August 2016 at 19:42:08 UTC, Lodovico Giaretta
wrote:
On Sunday, 21 August 2016 at 19:29:26 UTC, Engine Machine wrote:
[...]
The problem of this code has nothing to do with aliases. They
work correctly. The problem is variable shadowing. In the
following code, Child has two x
On Sunday, 21 August 2016 at 21:11:37 UTC, ag0aep6g wrote:
On 08/21/2016 09:29 PM, Engine Machine wrote:
I know you like to play the right or wrong game, but did you
ever learn
that a single example does not prove the truth of something?
But you can show in a single example that something
On Monday, 22 August 2016 at 00:22:48 UTC, ag0aep6g wrote:
On 08/22/2016 12:06 AM, Engine Machine wrote:
T!()'s "data" is specified in the class just like all the other
derivations. I don't want to have to specify an external base
class as
in your InstaniateOrBase. Why? Because!!! (There
On Friday, 19 August 2016 at 01:25:10 UTC, Anonymouse wrote:
On Friday, 19 August 2016 at 01:10:42 UTC, Engine Machine wrote:
I have a template that is suppose to create a type based on a
template parameter
static if (T == "int")
{
auto x = New!int();
}
else static if (T == "double")
{
On Friday, 19 August 2016 at 02:54:48 UTC, Basile B. wrote:
On Friday, 19 August 2016 at 01:53:22 UTC, Engine Machine wrote:
On Friday, 19 August 2016 at 01:25:10 UTC, Anonymouse wrote:
On Friday, 19 August 2016 at 01:10:42 UTC, Engine Machine
x = 1.234;
Ok, well, I guess the error comes
On Friday, 19 August 2016 at 01:18:28 UTC, Adam D. Ruppe wrote:
On Friday, 19 August 2016 at 01:10:42 UTC, Engine Machine wrote:
I feel that in this case I feel that the scope of the static
if should allow things to escape since, well, they are static
if's.
They do.
What, exactly, did you
struct Storage
{
// Getter
static auto ref opDispatch(string name)()
{
}
// Setter
static auto ref opDispatch(string name, T)(T val)
{
}
}
auto y = Storage.Data;
Storage.Data = "x";
Storage.Foo = 3;
How can I actually store this data for runtime use that doesn't
I am trying to get Timon Gehr's code working, with some
modifications:
public template TypeParent(P)
{
import std.traits;
alias T = TemplateArgsOf!P;
alias Seq(T...) = T;
static if (T.length == 0 || is(typeof(T[0]) == typeof(null)))
{
On Saturday, 20 August 2016 at 09:42:08 UTC, Jack Applegame wrote:
On Saturday, 20 August 2016 at 00:46:15 UTC, Engine Machine
wrote:
Any ideas?
Something like this?
mixin template TypeData(string type: "Animal") {
int y;
}
mixin template TypeData(string type: "Dog") {
int z;
}
mixin
On Saturday, 20 August 2016 at 06:28:47 UTC, Enamex wrote:
On Saturday, 20 August 2016 at 00:46:15 UTC, Engine Machine
wrote:
I am trying to get Timon Gehr's code working, with some
modifications:
void main()
{
import std.traits;
auto a = new Type!("Animal", "Dog", "Pug")();
Is there a way to rebind the arguments of a template?
template foo(X)
{
// X is like A!(a,b,c)
Y = Rebind!(X,d,e,f);
// Y is like A!(d,e,f);
}
foo(A!(a,b,c));
?
On Saturday, 20 August 2016 at 22:11:40 UTC, Engine Machine wrote:
Is there a way to rebind the arguments of a template?
template foo(X)
{
// X is like A!(a,b,c)
Y = Rebind!(X,d,e,f);
// Y is like A!(d,e,f);
}
foo(A!(a,b,c));
?
I'd also be happy if I could just remove the last
On Saturday, 20 August 2016 at 22:21:00 UTC, ag0aep6g wrote:
On 08/21/2016 12:11 AM, Engine Machine wrote:
Is there a way to rebind the arguments of a template?
template foo(X)
{
// X is like A!(a,b,c)
Y = Rebind!(X,d,e,f);
// Y is like A!(d,e,f);
}
foo(A!(a,b,c));
?
template
On Wednesday, 17 August 2016 at 18:38:48 UTC, Engine Machine
wrote:
On Wednesday, 17 August 2016 at 08:37:32 UTC, Lodovico Giaretta
wrote:
On Tuesday, 16 August 2016 at 23:18:28 UTC, Adam D. Ruppe
wrote:
[...]
You mean something like:
struct MySequence(Args...)
{
enum length =
On Wednesday, 17 August 2016 at 19:15:48 UTC, ag0aep6g wrote:
On 08/17/2016 08:38 PM, Engine Machine wrote:
[...]
[...]
[...]
With MySequence being a type, you can do this:
static if (is(x.args[2] == MySequence!Args, Args ...))
{
...
}
It works! Nifty that you can do that
On Wednesday, 17 August 2016 at 19:21:57 UTC, Lodovico Giaretta
wrote:
On Wednesday, 17 August 2016 at 19:15:48 UTC, ag0aep6g wrote:
[...]
import std.traits: TemplateOf;
static if (__traits(isSame, TemplateOf!(x.args[2]), MySequence))
{
...
}
std.traits.TemplateOf extracts the symbol
On Monday, 22 August 2016 at 22:52:28 UTC, ag0aep6g wrote:
On Monday, 22 August 2016 at 21:46:35 UTC, Engine Machine wrote:
I'm sorry if it confuses you... it doesn't confuse me.
You needed quite some help to get this thing to work. And you
made some mistakes and wrong statements in the
https://en.wikipedia.org/wiki/Virtual_class
Can D do stuff like this naturally?
On Monday, 22 August 2016 at 19:09:34 UTC, Jack Applegame wrote:
On Monday, 22 August 2016 at 18:04:43 UTC, Engine Machine wrote:
How do you seriously think this is cleaner/simpler?
1. No extra encrypted things, such as InstantiateOrEmptySeq
2. Much more understandable.
You have two classes.
On Monday, 22 August 2016 at 18:48:12 UTC, ag0aep6g wrote:
On 08/22/2016 08:04 PM, Engine Machine wrote:
How do you seriously think this is cleaner/simpler? You have
two
classes. Their is no uniformity between them. You have
uniformity
between all the derived classes then have a special case
On Monday, 22 August 2016 at 07:54:36 UTC, Jack Applegame wrote:
On Monday, 22 August 2016 at 00:43:00 UTC, Engine Machine wrote:
The following code works and does what I want!
template InstantiateOrEmptySeq(alias tmpl, args...)
{
alias Seq(T...)=T;
static if (args.length > 0)
On Monday, 22 August 2016 at 05:02:41 UTC, jkpl wrote:
On Monday, 22 August 2016 at 04:52:40 UTC, Cauterite wrote:
[...]
That's a 32 bit codegen issue then because DMD64 's disasm
shows that SSE regs are used:
void foo()
{
union test { int i; float f; }
test t = { i :
52 matches
Mail list logo
