On Sun, 15 Mar 2015 13:28:33 +, ketmar wrote:
template Foo(int a, string b) {
import std.format : format;
enum Foo = q{
{
import std.conv : to; return %2$s+to!string(%1$s);
}
}.format(a, b.stringof);
}
positional args, syntax highlighting, usage like
On Sat, 14 Mar 2015 18:20:47 -0700, Timothee Cour via Digitalmars-d-learn
wrote:
Why can't we allow mixin templates to contain statements, as is the case
for regular mixins?
Is there a workaround?
here's a dummy example:
template mixin Foo{
//some statement, eg: 'return;'
}
void
On Sunday, 15 March 2015 at 15:48:34 UTC, Robert M. Münch wrote:
Hi, wondering why this happens:
import std.format;
void ods(T...)(auto ref T args){
format(args).ptr;
return;
}
ods(%s @ %s, mystring, mystring.ptr);
Error: undefined identifier format
If I add: import std.string;
On 2015-03-14 20:45:21 +, Marc Schütz said:
As long as the pointer remains on the stack or in a register, the GC
will keep the allocation alive.
Hi Marc, ok, got it. Thanks.
But if your C code stores the pointer on the C heap or in a global,
the GC won't know anything about it and can
Hi, wondering why this happens:
import std.format;
void ods(T...)(auto ref T args){
format(args).ptr;
return;
}
ods(%s @ %s, mystring, mystring.ptr);
Error: undefined identifier format
If I add: import std.string; everything compiles and works.
Since the docs of std.format contains all
Should this work?
struct V(string s) {
}
struct S(int U) {
V!xyz x;
alias x this;
}
void main() {
S!10 a;
static assert(is(a : V!Args, Args...));
}
With DMD Git master, the static assert() fails. Should it? Am I
doing something wrong?
On Sunday, 15 March 2015 at 15:08:43 UTC, Robert M. Münch wrote:
On 2015-03-14 20:45:21 +, Marc Schütz said:
As long as the pointer remains on the stack or in a register,
the GC will keep the allocation alive.
Hi Marc, ok, got it. Thanks.
But if your C code stores the pointer on the C
On Sunday, 15 March 2015 at 00:56:24 UTC, Ellery Newcomer wrote:
On Saturday, 14 March 2015 at 23:57:33 UTC, weaselcat wrote:
On Saturday, 14 March 2015 at 23:46:28 UTC, Ellery Newcomer
wrote:
And C# has LINQ, which when combined with the last point is
fricken awesome.
what does LINQ offer
On Sunday, 15 March 2015 at 15:41:09 UTC, Darts wrote:
Hey, I'm just looking for how to turn some numbers into strings
in particualr ways. Specifically, I want to force some ints
(and maybe floats too) to give me a string that consists of
exactly four numbers ( 3005, 0038, 0130, etc ). I'd
Hey, I'm just looking for how to turn some numbers into strings
in particualr ways. Specifically, I want to force some ints (and
maybe floats too) to give me a string that consists of exactly
four numbers ( 3005, 0038, 0130, etc ). I'd also like to know how
to format a float to give me only
On Saturday, 14 March 2015 at 09:59:05 UTC, dnewer wrote:
yes,java is good lang,but i dont think it's better than c#,if
no oracle or google support java will less and less.
C# is a good and easy lang.
i like C# .
but,C# cant compiled to native code.
So far, I have been searching for a
On 2015-03-14 22:55:57 +, Jonathan M Davis via Digitalmars-d-learn said:
In case you didn't know, if you're not running the program in visual studio,
you should see the output in in DebugView:
https://technet.microsoft.com/en-us/library/bb896647.aspx
Hi, yes I know, nevertheless thanks
On 2015-03-15 17:36:24 +, Robert M. Münch said:
Is there a way to use version(...) to have code sections depending on
compiler version? Something like:
version(dmd = 2.067) or version(dmd 2.067)?
Answerting myself:
static if (__traits(compiles, version_minor 67))
import std.string;
What is: Orphan format arguments: args[0..1]
It appears to come from within unittest at the line:
strings={0}.format(cast(int)d2[i]);
d2 is:
ubyted2[];
It should be 512 bytes long, but that hasn't been checked at the point
of the error.
The compilation used was:
rdmd
On Sunday, 15 March 2015 at 18:03:55 UTC, Robert M. Münch wrote:
On 2015-03-15 17:36:24 +, Robert M. Münch said:
Is there a way to use version(...) to have code sections
depending on compiler version? Something like:
version(dmd = 2.067) or version(dmd 2.067)?
Answerting myself:
On 03/15/2015 08:47 AM, Marc =?UTF-8?B?U2Now7x0eiI=?=
schue...@gmx.net wrote:
Should this work?
struct V(string s) {
}
struct S(int U) {
V!xyz x;
alias x this;
}
void main() {
S!10 a;
static assert(is(a : V!Args,
On Sunday, 15 March 2015 at 16:44:14 UTC, Ali Çehreli wrote:
On 03/15/2015 08:47 AM, Marc =?UTF-8?B?U2Now7x0eiI=?=
schue...@gmx.net wrote:
Should this work?
struct V(string s) {
}
struct S(int U) {
V!xyz x;
alias x this;
}
void main() {
https://issues.dlang.org/show_bug.cgi?id=14286
In the meantime, does someone know of a suitable workaround?
On Sunday, 15 March 2015 at 14:58:54 UTC, Idan Arye wrote:
On Sunday, 15 March 2015 at 00:56:24 UTC, Ellery Newcomer wrote:
On Saturday, 14 March 2015 at 23:57:33 UTC, weaselcat wrote:
On Saturday, 14 March 2015 at 23:46:28 UTC, Ellery Newcomer
wrote:
And C# has LINQ, which when combined with
On Sunday, 15 March 2015 at 16:53:34 UTC, Marc Schütz wrote:
On Sunday, 15 March 2015 at 16:44:14 UTC, Ali Çehreli wrote:
On 03/15/2015 08:47 AM, Marc =?UTF-8?B?U2Now7x0eiI=?=
schue...@gmx.net wrote:
Should this work?
struct V(string s) {
}
struct S(int U) {
V!xyz
On Sunday, 15 March 2015 at 18:53:33 UTC, Nicolas Sicard wrote:
Can be reduced to:
struct Foo(int i) {}
alias Foo1 = Foo!1;
static assert(is(Foo!2 == Foo1!T, T...)); // OK
I think it's another bug.
Right, I've filed another report:
https://issues.dlang.org/show_bug.cgi?id=14290
Thanks! That works perfectly! ;) I'll remember they're called
Format Strings now.
Tangentially related follow up: if I want to cast a string to a
dstring... what are the rules for that? I'm getting an
object.Error@(0): array cast misalignment message when my
program crashes tring to convert
On 2015-03-15 16:22:03 +, Marc Schütz said:
For whatever reasons, format() used to be defined in std.string. Indeed
it's unintuitive to have it there, and it also pulls in lots of other
unrelated things like Unicode tables when you import std.string. That's
why it was moved into
On Saturday, 14 March 2015 at 09:59:05 UTC, dnewer wrote:
yes,java is good lang,but i dont think it's better than c#,if
no oracle or google support java will less and less.
C# is a good and easy lang.
i like C# .
Not sure what do you mean. D has classes, interfaces and foreach,
that should
On Sunday, 15 March 2015 at 18:52:29 UTC, Marc Schütz wrote:
On Sunday, 15 March 2015 at 17:11:07 UTC, Darts wrote:
Thanks! That works perfectly! ;) I'll remember they're called
Format Strings now.
Tangentially related follow up: if I want to cast a string to
a dstring... what are the rules
On Sunday, 15 March 2015 at 17:03:42 UTC, Marc Schütz wrote:
https://issues.dlang.org/show_bug.cgi?id=14286
In the meantime, does someone know of a suitable workaround?
I found the following workaround. Not beautiful, but it works:
enum isValue(alias T) = __traits(compiles, typeof(T));
On Sunday, 15 March 2015 at 14:58:54 UTC, Idan Arye wrote:
Here is a very crude, very basic example:
http://dpaste.dzfl.pl/94d851d7ca63.
U++ approach will probably give more succinct result. Not sure
how it fares against D philosophy: does it replace range
primitives with whole new thing?
On Sunday, 15 March 2015 at 18:33:32 UTC, Marc Schütz wrote:
On Sunday, 15 March 2015 at 17:03:42 UTC, Marc Schütz wrote:
https://issues.dlang.org/show_bug.cgi?id=14286
In the meantime, does someone know of a suitable workaround?
I found the following workaround. Not beautiful, but it works:
On Sunday, 15 March 2015 at 17:11:07 UTC, Darts wrote:
Thanks! That works perfectly! ;) I'll remember they're called
Format Strings now.
Tangentially related follow up: if I want to cast a string to a
dstring... what are the rules for that? I'm getting an
object.Error@(0): array cast
On Sunday, 15 March 2015 at 18:46:52 UTC, Charles Hixson wrote:
What is: Orphan format arguments: args[0..1]
It appears to come from within unittest at the line:
strings={0}.format(cast(int)d2[i]);
It means you gave `format` more arguments than placeholders.
`format` uses C style
I have App that read config sections. If the section is true I
want to run it in new thread.
if (parseconfig.obsmpplots_load == true)
{
auto obsmpplots = new ObsmpPlots(db);
auto theTask = task(obsmpplots.getPlots);
On Sunday, 15 March 2015 at 23:13:58 UTC, Charles Cooper wrote:
And yes, I could use names. But then you are subject to name
clashes and using strings instead of types as member
identifiers is more prone to error anyways. Ever gotten this
wrong before --
void CRITICAL_TO_GET_THIS_RIGHT(uint
On Sun, 15 Mar 2015 16:34:14 -0700, Charles Hixson via Digitalmars-d-learn
wrote:
if you know the exact layouts of `spare`, you can use union for that:
struct S {
// ...
union {
ulong[61] spare;
struct { int vala; ubyte valb; }
// etc.
}
}
and then you can use it like this:
On Sunday, 15 March 2015 at 21:59:18 UTC, Charles Cooper wrote:
C++14 has:
templateclass T, class... Types constexpr T
get(tupleTypes... t);
Which allows you to get a member of the tuple struct by type.
Is there an idiomatic / library way to do this in D? Preferably
by indexing.
I don't
foo[1] is sometimes better, but not always. One has to go back to
the definition of the thing and literally calculate by hand which
element of the tuple you want, and then try compiling it, and so
forth. Although the type system will guarantee that you
eventually get it right it is a waste of
I've got, say, a file header in a routine that looks like:
structBlockHead
{ uintmagic=20150312;//block magic
uintmagic2;//magic for use by
the using routine
uintblockSize;
uintunused1;
ulongunused2;
Not offended at all :), in fact it was not even my suggestion
that it be included in the standard. I was just knee jerk
reacting to the comment that, just because something is simple to
do precludes it from getting standardized
On Sunday, 15 March 2015 at 23:28:18 UTC, ketmar wrote:
sorry
Charles Cooper:
Yes, I could say
external_api1_react_to_event(event_t[1], event_t[0])
.. but that is barbaric. It's a productivity sink because I
have to go back to the original definition, align the
arguments, and then context switch back to whatever I was
working on before.
If you are
C++14 has:
templateclass T, class... Types constexpr T
get(tupleTypes... t);
Which allows you to get a member of the tuple struct by type. Is
there an idiomatic / library way to do this in D? Preferably by
indexing.
Here is what I have, it is ugly but works:
/* CODE */
static import
On Sun, 15 Mar 2015 22:35:03 +, weaselcat wrote:
Seems like a useful feature(useful enough to get past the C++
standards committee,) consider submitting a phobos PR?
ah, c++ committee accepts by randomness. ;-) honestly, i can't see why
it's useful and where it can be used. and it's so
p.s. to be clear: it's freaking hard to do metaprogramming and template
functional programming in c++, that's why c++ committee accepts such
things. and it's very easy to write such code in D, so this is a good
excersise for newcomers and almost no-brainer for expirienced D user.
signature.asc
Thanks for the style recommendations.
On Sunday, 15 March 2015 at 23:14:32 UTC, anonymous wrote:
I don't think there is. I don't know if there should be.
Distinguishing tuple fields by their type doesn't seem very
useful to me, since multiple fields can have the same type.
Using combined
Sure. It is also easy to write merge sort. Or
std.typetuple.Erase. Or Tuple.opIndex(size_t). But that doesn't
mean everybody does it. Some utilities (and I am not saying this
is, but it could be) are widely used enough that it makes sense
to put them in the standard.
On Sunday, 15 March 2015
On Sun, 15 Mar 2015 23:30:48 +, Charles Cooper wrote:
Not offended at all :), in fact it was not even my suggestion that it be
included in the standard. I was just knee jerk reacting to the comment
that, just because something is simple to do precludes it from getting
standardized
ah, i
http://dlang.org/phobos/std_variant.html#.Algebraic
Thanks! This is fascinating, really a breath of fresh air coming
from the C++ way of doing things.
On Sunday, 15 March 2015 at 23:31:59 UTC, bearophile wrote:
If you are experiencing those problems it's probably the way
D/Phobos to tell you
On Sun, 15 Mar 2015 21:59:16 +, Charles Cooper wrote:
C++14 has:
templateclass T, class... Types constexpr T get(tupleTypes... t);
Which allows you to get a member of the tuple struct by type. Is there
an idiomatic / library way to do this in D? Preferably by indexing.
why indexing?
True. If I had to do something involving such an API I would
first wrap the API with a type safe one before doing anything
else.
void external_api_do_something(uint dollars, uint cents);
/* I think this could somehow be automated with staticMap and
ParameterTypeTuple /
On Sun, 15 Mar 2015 23:17:34 +, Charles Cooper wrote:
Sure. It is also easy to write merge sort. Or std.typetuple.Erase. Or
Tuple.opIndex(size_t). But that doesn't mean everybody does it. Some
utilities (and I am not saying this is, but it could be) are widely used
enough that it makes
On Sunday, 15 March 2015 at 17:36:24 UTC, Robert M. Münch wrote:
Ok, good to here. Didn't cath/remember this one.
Is there a way to use version(...) to have code sections
depending on compiler version? Something like:
version(dmd = 2.067) or version(dmd 2.067)?
static if( __VERSION__ =
On Monday, 16 March 2015 at 04:31:19 UTC, Mike Parker wrote:
On Sunday, 15 March 2015 at 17:36:24 UTC, Robert M. Münch wrote:
Ok, good to here. Didn't cath/remember this one.
Is there a way to use version(...) to have code sections
depending on compiler version? Something like:
Is there a way to exclude current directory from search path in dmd, so
that the search path is only given by '-I' arguments (+ones from dmd.conf)?
use case:
files:
/base/foo.d
/base/bar/foo.d
/base/bar/main.d #contains: import foo.d
cd /base/bar
dmd -I/base main.d
= I want 'import foo.d' to
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