On Thursday, 10 October 2013 at 22:27:14 UTC, Spacen Jasset wrote:
Hello,
I am after a fast floor function; In fact a fast truncation and
conversion to integer. I see that std.math takes a real, and
that std.c.math takes a double.
Is there a quicker function, and what might cast(int)1.5f do?
On Friday, 11 October 2013 at 04:13:55 UTC, Agustin wrote:
I have a function that needs to check if the template provided
inherit a class.
For example:
public void function(T, A...)(auto ref A values)
{
// static assert(IsBaseOf(L, T));
}
Check if T inherit class "L". Same result that
std:
On Thursday, October 10, 2013 21:35:37 Ali Çehreli wrote:
> One of the uses of the is expression determines "whether implicitly
> convertible to". It may work for you:
>
> public void foo(T, A...)(auto ref A values)
> {
> static assert(is (T : L));
> }
Actually, checking for implicit convers
On 10/10/2013 09:13 PM, Agustin wrote:
> I have a function that needs to check if the template provided inherit a
> class.
>
> For example:
>
> public void function(T, A...)(auto ref A values)
function happens to be a keyword. :)
> {
>// static assert(IsBaseOf(L, T));
> }
>
> Check if T inh
I have a function that needs to check if the template provided
inherit a class.
For example:
public void function(T, A...)(auto ref A values)
{
// static assert(IsBaseOf(L, T));
}
Check if T inherit class "L". Same result that std::is_base_ofT>::value using C++. Any clean way to do it, witho
On 11/10/13 01:43, Daniel Davidson wrote:
That is probably a reasonable interpretation... but I think it will only get you
pain. The fact is, regardless of your interpretation of "const" arguments - the
general guideline is "prefer const because immutables and mutables can be passed
in".
Which
On Thursday, 10 October 2013 at 23:12:24 UTC, qznc wrote:
The linked page clearly says "It may, however, be changed by
another reference to that same data."
usually you would think that no one else should change the
data while callee runs. but at least with c++ i could imagine
running callee
On 09/10/13 17:50, Daniel Davidson wrote:
Take, for example, LinearCongruentialEngine from random.d. It has a function:
bool opEquals(ref const LinearCongruentialEngine rhs) const
Why is it using const here instead of immutable?
Among other things, because no LinearCongruentialEngine wil
On Thursday, 10 October 2013 at 23:06:23 UTC, qznc wrote:
Maybe the fact that D allows this implicit copy to immutable is
the problem? If one could require the use of a specific
function, this function could be overridden with working
behavior. The following code works.
Yes - the issue aris
On Thursday, 10 October 2013 at 18:39:32 UTC, Christian Köstlin
wrote:
On 10/10/13 1:05 , qznc wrote:
Very interesting discussion!
> contract between caller and callee. If an argument is const,
it means
> the callee says he can handle others changing the state
concurrently.
i think what the usua
On Wednesday, 9 October 2013 at 04:31:55 UTC, Ali Çehreli wrote:
On 10/08/2013 03:12 PM, qznc wrote:
> On Monday, 7 October 2013 at 17:57:11 UTC, Ali Çehreli wrote:
>> To look at just one usage example, the following line
carries two
>> requirements:
>>
>> auto a = T();
>> immutable b = a
On 11/10/13 00:27, Spacen Jasset wrote:
I am after a fast floor function; In fact a fast truncation and conversion to
integer. I see that std.math takes a real, and that std.c.math takes a double.
Is there a quicker function, and what might cast(int)1.5f do?
What's wrong with
to!int(floor
Short version:
I have a struct A* aptr allocated in C/C++ with an internal
pointer aptr->ptr (say a double*)
I want to store a reference x (say double[]) in D to aptr only through
aptr->ptr, not through aptr directly as it's inconvenient in my use case.
How do I achieve that, so that when x goes o
Hello,
I am after a fast floor function; In fact a fast truncation and
conversion to integer. I see that std.math takes a real, and that
std.c.math takes a double.
Is there a quicker function, and what might cast(int)1.5f do?
Regards,
Spacen.
On Thursday, 10 October 2013 at 19:49:15 UTC, Andrew wrote:
Hi All,
I've been writing a MUD for a little while, initially using
Haskell but now using C. I develop on MacOS X but deploy to a
Raspberry Pi. I loved using Haskell especially using the Parsec
parser but unfortunately I couldn't bui
Andrej Mitrovic:
I'm pretty sure I saw it filed somewhere. Can't find it though..
I have just added the new test case :-)
http://d.puremagic.com/issues/show_bug.cgi?id=6754
Bye,
bearophile
On 10/10/13, bearophile wrote:
> Perhaps this bug is not yet in Bugzilla.
I'm pretty sure I saw it filed somewhere. Can't find it though..
On Thursday, 10 October 2013 at 17:24:37 UTC, H. S. Teoh wrote:
I have a template used for storing compile-time values:
template Def(int x, string y) {
alias impl = TypeTuple!(x,y);
}
How do I define a template isDef that, given some template
alias A,
evaluates
On Thursday, 10 October 2013 at 19:49:15 UTC, Andrew wrote:
Hence my interest in D. I've spent a few hours trying to get
GDC working on my Pi which is proving to be a bitch but I'm
hoping that it will be worth it.
I haven't done a serious program on the Pi, but I was able to get
gdc and some
Hi All,
I've been writing a MUD for a little while, initially using
Haskell but now using C. I develop on MacOS X but deploy to a
Raspberry Pi. I loved using Haskell especially using the Parsec
parser but unfortunately I couldn't build on the Pi because the
resource requirements were just too
On Thursday, 10 October 2013 at 19:19:53 UTC, Ali Çehreli wrote:
import std.c.linux.termios;
worth noting that this is Linux only. doing it on Windows is a
little different.
Working with console/terminal input and output can get
surprisingly complex, and doing it cross-platform is easiest w
On 10/10/2013 11:56 AM, Alejandro wrote:
> catched a single character, a single keydown
The following program is based on the following newsgroup post:
http://forum.dlang.org/post/mailman.2665.1300747084.4748.digitalmars-d-le...@puremagic.com
The program prints character codes in hex until it
Hi
I'm new in D, have some experience in JavaScript and PHP, and
learned, for long time ago, C and a bit little C++
I remember that when I learned C with console output, it was two
easy ways to catch input : one witch a required keydown,
and an other witch catched a single character, a sin
On Thursday, 10 October 2013 at 17:47:54 UTC, Namespace wrote:
import std.stdio;
void foo1(void function(void*) fp) { }
void foo2(void function(int) fp) { }
void foo3(void*) { }
void main()
{
foo1((void* ptr) => ( assert(ptr is null) ));
foo2((int a) => ( a + 1 )); /// Fails: Erro
On 10/10/13 1:05 , qznc wrote:
Very interesting discussion!
> contract between caller and callee. If an argument is const, it means
> the callee says he can handle others changing the state concurrently.
i think what the usual understanding of const for an argument to callee
is, what is written
Simen Kjaeraas:
You've got the order wrong - copy takes first the source, then
the target.
I'd like it to be (re)named "copyTo" to avoid me such common
mistake.
Bye,
bearophile
On 2013-10-10, 16:04, bearophile wrote:
dominic jones:
I want to fill an array with random numbers without resorting to loops,
i.e. by doing something like the following, if it were possible:
fill!(function double(){ return uniform(0.0, 1.0);})(x[]);
Is there a simple way of doing this?
On 2013-10-10, 19:23, H. S. Teoh wrote:
I have a template used for storing compile-time values:
template Def(int x, string y) {
alias impl = TypeTuple!(x,y);
}
How do I define a template isDef that, given some template alias A,
evaluates to true if A is some ins
import std.stdio;
void foo1(void function(void*) fp) { }
void foo2(void function(int) fp) { }
void foo3(void*) { }
void main()
{
foo1((void* ptr) => ( assert(ptr is null) ));
foo2((int a) => ( a + 1 )); /// Fails: Error: function foo2
(void function(int) fp) is not callable using
I have a template used for storing compile-time values:
template Def(int x, string y) {
alias impl = TypeTuple!(x,y);
}
How do I define a template isDef that, given some template alias A,
evaluates to true if A is some instantiation of Def?
template isDef(
Namespace:
/d917/f732.d(8): Error: basic type expected, not extern
/d917/f732.d(8): Error: semicolon expected to close alias
declaration
/d917/f732.d(8): Error: no identifier for declarator void
function(T*)
It seems that even the new alias syntax doesn't support the
extern :-) Perhaps this
On Thursday, 10 October 2013 at 15:15:45 UTC, bearophile wrote:
Namespace:
You mean like this?
void foo(T)(extern(C) void function(T*) func) {
}
That prints: Error: basic type expected, not extern
In theory that's correct, in practice the compiler refuses
tha
On Thursday, 10 October 2013 at 15:15:45 UTC, bearophile wrote:
Namespace:
You mean like this?
void foo(T)(extern(C) void function(T*) func) {
}
That prints: Error: basic type expected, not extern
In theory that's correct, in practice the compiler refuses
tha
On Thursday, 10 October 2013 at 14:44:00 UTC, Dicebot wrote:
On Thursday, 10 October 2013 at 14:40:09 UTC, Namespace wrote:
Example? I do not use lambdas often.
void foo(T)(void function(T*) test)
{
}
extern(C) void bar(int*) { }
void main()
{
foo( (int* a) => bar(a) );
}
I don't kn
Namespace:
You mean like this?
void foo(T)(extern(C) void function(T*) func) {
}
That prints: Error: basic type expected, not extern
In theory that's correct, in practice the compiler refuses that,
it's in Bugzilla, so try to define the type outside the signat
On Thursday, 10 October 2013 at 14:28:20 UTC, Dicebot wrote:
On Thursday, 10 October 2013 at 14:13:47 UTC, Namespace wrote:
I have this function:
void foo(T)(void function(T*) test) { }
And want to call it with a C function:
foo!(SDL_Surface)(SDL_FreeSurface);
but I get:
Fe
On Thursday, 10 October 2013 at 14:40:09 UTC, Namespace wrote:
Example? I do not use lambdas often.
void foo(T)(void function(T*) test)
{
}
extern(C) void bar(int*) { }
void main()
{
foo( (int* a) => bar(a) );
}
I don't know to what extent IFTI can work here though.
On Thursday, 10 October 2013 at 14:26:37 UTC, Benjamin Thaut
wrote:
Am 10.10.2013 16:13, schrieb Namespace:
I have this function:
void foo(T)(void function(T*) test) { }
And want to call it with a C function:
foo!(SDL_Surface)(SDL_FreeSurface);
but I get:
Fehler1Err
Am 10.10.2013 16:13, schrieb Namespace:
I have this function:
void foo(T)(void function(T*) test) { }
And want to call it with a C function:
foo!(SDL_Surface)(SDL_FreeSurface);
but I get:
Fehler1Error: foo (void function(SDL_Surface*) test) is not
callable using argu
On Thursday, 10 October 2013 at 14:13:47 UTC, Namespace wrote:
I have this function:
void foo(T)(void function(T*) test) { }
And want to call it with a C function:
foo!(SDL_Surface)(SDL_FreeSurface);
but I get:
Fehler 1 Error: foo (void function(SDL_Surface*) test) is not
c
I have this function:
void foo(T)(void function(T*) test) { }
And want to call it with a C function:
foo!(SDL_Surface)(SDL_FreeSurface);
but I get:
Fehler 1 Error: foo (void function(SDL_Surface*) test) is not
callable using argument types (extern (C) void
function(SDL_Surf
dominic jones:
I want to fill an array with random numbers without resorting
to loops, i.e. by doing something like the following, if it
were possible:
fill!(function double(){ return uniform(0.0, 1.0);})(x[]);
Is there a simple way of doing this?
Generally it's a good idea to use only p
Hello,
I want to fill an array with random numbers without resorting to
loops, i.e. by doing something like the following, if it were
possible:
fill!(function double(){ return uniform(0.0, 1.0);})(x[]);
Is there a simple way of doing this?
Thank you,
Dominic Jones
P.S. I am aware of the
On Wednesday, 9 October 2013 at 23:05:27 UTC, qznc wrote:
On Wednesday, 9 October 2013 at 15:50:55 UTC, Daniel Davidson
wrote:
void foo(const(MutableType) mt);
void foo(immutable(MutableType) mt);
Naturally the inclination is to choose the second as it is a
stronger guarantee that no threads a
On Saturday, 5 October 2013 at 21:33:32 UTC, Andrej Mitrovic
wrote:
On 10/5/13, webwraith wrote:
I don't know about you, but it's beginning to look to me like
SetConsoleScreenBufferSize() takes pixels as its unit of
measurement, and not columns and rows, as is stated in its
documentation. I don
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