Re: Status of Win32 C++ interop
On Monday, 7 September 2015 at 19:30:44 UTC, drug wrote: 07.09.2015 21:37, Benjamin Thaut пишет: snip So far I haven't found a situation where I couldn't make it work the way I wanted. Its just some work to write the D headers for the C++ classes and vise versa, because you have to duplicate everything once more. An automated tool for this would be nice, but unfotunately there is currently none. Kind Regards Benjamin Thaut It's great. But isn't it based on your custom modifications of compiler and the others? No, the compiler modifications are only for the Windows DLL support. All modifications I did to the c++ binding are already in 2.068
Re: What's the "right" way to do openmp-style parallelism?
On Tuesday, 8 September 2015 at 05:50:30 UTC, Russel Winder wrote:
void main() {
immutable imax = 10;
immutable jmax = 10;
float[imax][jmax] x;
foreach(int j; 1..jmax){
foreach(int i, ref item; parallel(x[j-1])){
x[j][i] = complicatedFunction(i, item);
}
}
}
(though sadly, this doesn't compile for a reason I can't fathom
instantly)
Hmm. Shouldn't you instead parallel the outer loop?
Re: OSX prompt limit
On Friday, 4 September 2015 at 03:31:40 UTC, Adam D. Ruppe wrote:
On Friday, 4 September 2015 at 02:17:57 UTC, Joel wrote:
In Mac OS, when typing with readln etc. I can't use the cursor
keys. Works in Windows though.
That's normal, line editing on Unix terminals is a kinda
advanced library feature. The most common lib to do it, GNU
readline, is actually a big thing that pushed the GPL because
of how useful it was and it happened to use that license.
I wrote one too though it is a bit bulky.
https://github.com/adamdruppe/arsd/blob/master/terminal.d
import terminal;
void main() {
auto terminal = Terminal(ConsoleOutputMode.linear);
auto line = terminal.getline("your prompt: ");
terminal.writeln("You wrote: ", line);
}
compile:
dmd yourapp.d terminal.d
I get these errors with terminal.d (on OSX):
Joels-MacBook-Pro:small joelcnz$ rdmd term.d
arsd/terminal.d(1268): Error: undefined identifier 'SIGWINCH'
arsd/terminal.d(1381): Error: undefined identifier 'SIGWINCH'
Joels-MacBook-Pro:small joelcnz$
Note: I've got term.d as the main file, I've got terminal.d in
arsd folder
I've put up an issue on your github site.
Re: Regression?
On Tuesday, 8 September 2015 at 04:04:16 UTC, Sebastiaan Koppe
wrote:
Fixed it by changing into:
```
import std.conv : text;
string json =
File("../languages.json","r").byLineCopy().joiner.text;
auto ls = json.parseJSON();
```
Why would you read file by line and then merge all into one
string? You end up with reading the whole file (well, getting rid
of line ends) anyway, so probably the more efficient solution
would be just read the whole file at once with std.file.read and
cast to string.
Re: Why 1f.iota(100f).array returns double[] not float[]?
On 09/08/2015 12:00 AM, drug wrote:
import std.array : array;
import std.range : iota;
pragma(msg, typeof(iota(1f, 100f).array)); // why double[] not float[]?
void main()
{
}
It is probably because the type of floating point literals like 1.0 is
double. Probably there is a 1.0 in iota's implementation, converting the
element type to double according to rule number 2 here:
http://dlang.org/type.html#usual-arithmetic-conversions
Yep, here it is:
https://github.com/D-Programming-Language/phobos/blob/master/std/range/package.d#L4630
auto iota(B, E)(B begin, E end)
if (isFloatingPoint!(CommonType!(B, E)))
{
return iota(begin, end, 1.0);
}
Although any such expression can become double easily, I think the
literal should be 1.0f in this case.
Ali
Why 1f.iota(100f).array returns double[] not float[]?
import std.array : array;
import std.range : iota;
pragma(msg, typeof(iota(1f, 100f).array)); // why double[] not float[]?
void main()
{
}
What is "FilterResult" type?
From what I can gather the output of `std.algorithm.iteration : filter` is a `FilterResult` type. I need a bit of help dealing with this type: 1. Why this type is there in the first place instead of simply using the type of input range? 2. Where is the documentation for this type? The documentation always uses `auto` for `filter` return values. 3. How can I convert this type back into a range? Thanks.
Re: What is "FilterResult" type?
On Tuesday, 8 September 2015 at 09:48:35 UTC, Bahman Movaqar
wrote:
From what I can gather the output of `std.algorithm.iteration :
filter` is a `FilterResult` type.
I need a bit of help dealing with this type:
1. Why this type is there in the first place instead of
simply using the type of input range?
2. Where is the documentation for this type? The
documentation always uses `auto` for `filter` return values.
3. How can I convert this type back into a range?
Thanks.
Filter is a template and returns a FilterResult range which is
used to lazily compute the result. This behaviour is the same for
map and the majority of functions in std.algorithm.
It is an input range really (ie: it has front, popFront and
empty). You can chain it just like any other range with other
functions and normally don't have to know the exact type (which
would be complicated since it is a templated thing).
To store it in a variable if you don't know the exact type you
can use auto to use type deduction. If you need the type (for a
template for example) you can then use typeof.
Example:
void main() {
import std.stdio: writeln;
import std.algorithm: filter, map;
int[] arr = [1, 2, 3, 4, 5];
auto result = arr.filter!(x => x%2); // filter out even
numbers
result.writeln; // Writes [1, 3, 5];
// What is the type of result?
typeid(result).writeln;
//-> temporary.main.FilterResult!(__lambda2,
int[]).FilterResult
// Map takes a range, this works because result is one.
auto result2 = result.map!(x => 2*x);
//-> temporary.main.MapResult!(__lambda3,
FilterResult!(__lambda2,int[])).MapResult
// Here is the reason you don't want to type them yourself.
auto FTW!
typeid(result).writeln; // main.FilterResult!(__lambda2,
int[]).FilterResult
// You can put it back in an array too
import std.array: array;
int[] resultArr = result2.array;
}
If you want more precise documentation the best is to look to the
source code (/usr/include/dlang/dmd/std/algorithm/iteration if
you are on linux).
Re: What is "FilterResult" type?
On Tuesday, 8 September 2015 at 11:08:59 UTC, Bahman Movaqar
wrote:
On Tuesday, 8 September 2015 at 10:08:03 UTC, cym13 wrote:
Filter is a template and returns a FilterResult range which is
used to lazily compute the result. This behaviour is the same
for map and the majority of functions in std.algorithm.
You can also use .array to (greedily) evaluate the results, which
(for filter) will return a range of the same type as went in:
void main()
{
import std.array : array;
int[] arr = [1, 2, 3, 4, 5];
int[] result = arr.filter!(x => x%2).array;
}
Re: Status of Win32 C++ interop
On 08.09.2015 11:45, Benjamin Thaut wrote: On Monday, 7 September 2015 at 19:30:44 UTC, drug wrote: 07.09.2015 21:37, Benjamin Thaut пишет: snip So far I haven't found a situation where I couldn't make it work the way I wanted. Its just some work to write the D headers for the C++ classes and vise versa, because you have to duplicate everything once more. An automated tool for this would be nice, but unfotunately there is currently none. Kind Regards Benjamin Thaut It's great. But isn't it based on your custom modifications of compiler and the others? No, the compiler modifications are only for the Windows DLL support. All modifications I did to the c++ binding are already in 2.068 It's good. Thank you!
Re: What is "FilterResult" type?
On Tuesday, 8 September 2015 at 10:08:03 UTC, cym13 wrote: Filter is a template and returns a FilterResult range which is used to lazily compute the result. This behaviour is the same for map and the majority of functions in std.algorithm. Ah...now it makes sense why use a proxy to the results. It is an input range really (ie: it has front, popFront and empty). You can chain it just like any other range with other functions and normally don't have to know the exact type (which would be complicated since it is a templated thing). I agree. Some types are better left unspecified; like some 300+ characters long type signatures one would get from a generic Scala function :-D However, I have made this a strict practice of mine to specify the full signature of my public API. I suppose, if I want to be pedantic, I have to realise the lazy value first and pass the resulting array out. Is this correct? To store it in a variable if you don't know the exact type you can use auto to use type deduction. True. Example: Great. The usage is crystal clear to me now. If you want more precise documentation the best is to look to the source code (/usr/include/dlang/dmd/std/algorithm/iteration if you are on linux). Thanks for the help and pointers.
Re: Why 1f.iota(100f).array returns double[] not float[]?
On Tuesday, 8 September 2015 at 07:17:01 UTC, Ali Çehreli wrote:
https://github.com/D-Programming-Language/phobos/blob/master/std/range/package.d#L4630
auto iota(B, E)(B begin, E end)
if (isFloatingPoint!(CommonType!(B, E)))
{
return iota(begin, end, 1.0);
}
Such kind of stuff would better be written as
auto iota(B, E)(B begin, E end)
{
return iota(begin, end, cast(CommonType!(B, E))1.0);
}
this doesn't need a constraint anymore, or maybe use
if(isNumeric!(CommonType!(B, E)))
I tend to use the above kind of cast often, because I like to
work with ubyte or ushort, and every f***ing number literal
changes the type to uint :-/
Re: Regression?
On Tuesday, September 08, 2015 07:12:50 FreeSlave via Digitalmars-d-learn wrote:
> On Tuesday, 8 September 2015 at 04:04:16 UTC, Sebastiaan Koppe
> wrote:
> > Fixed it by changing into:
> >
> > ```
> > import std.conv : text;
> > string json =
> > File("../languages.json","r").byLineCopy().joiner.text;
> > auto ls = json.parseJSON();
> > ```
>
> Why would you read file by line and then merge all into one
> string? You end up with reading the whole file (well, getting rid
> of line ends) anyway, so probably the more efficient solution
> would be just read the whole file at once with std.file.read and
> cast to string.
Or just use std.file.readText:
http://dlang.org/phobos/std_file.html#readText
- Jonathan M Davis
Re: Concurency wtf?
On 9/8/15 2:54 PM, Prudence wrote:
I can't seem to receive certain messages, my code is very simple and it
all works except for receiving:
in one thread I do
locate("MyMonitor").send(cast(shared)pt);
You are casting to shared here.
which sends the message(pt is a windows POINT structure).
In the MyMonitor spawned thread, I have
while (true)
{
POINT y;
receiveTimeout(100.msecs,
(POINT p)
But not receiving a shared(POINT) here.
So the types are different.
What is a POINT struct? If it's simple POD (with no pointers), then you
don't need the shared type modifier.
-Steve
Re: Is D suitable for my latest project?
On Sunday, 6 September 2015 at 14:45:45 UTC, BBasile wrote: You have Object.factory for this. You can also use a custom factory based on string comparison. (with some: static if(condition) return new This; else static if(otherCondition) return new That; etc). I just had a look at Object.factory and this isn't actually what I wanted. I was looking for something that would allow me to create new (previously undefined) classes in D at runtime that I could then use with Object.factory to create instances of. I think I can do this with Variants and dynamic, is this possible? Or is there another way?
Re: Implicit conversion with ctor like C++
I made a mistake it's more like:
//Sample class
class CClass
{
this(string MyValue){...}
}
//Called function
void MyFunction(CClass MyClass){}
void main()
{
MyFunction("Hello World!"); //Failed : MyFunction not
callable...
}
Re: Implicit conversion with ctor like C++
On Tuesday, 8 September 2015 at 19:23:47 UTC, Pierre wrote:
Hi everybody,
I would like to use implicit conversion like this:
//Sample class
class MyClass
{
this(string MyValue){...}
}
//Called function
void MyFunction(Foo MyFoo){}
void main()
{
MyFunction("Hello World!"); //Failed : MyFunction not
callable...
}
I saw in forum this is OK because D doesn't do implicit
conversion with ctor like C++
But how can I do ? May I use alias ?
Thank you for your attention.
No, as far as I know, D does not support implicit construction of
classes or structs. There is *some* implicit conversion allowed,
but in the opposite direction.
struct Test
{
string s;
alias s this;
//Necessary for nice construction syntax
this(string s) { this.s = s; }
}
void foo(string s)
{
writeln(s);
}
void main()
{
Test t = "asdf";
foo(t); //Prints "asdf"
}
So with alias this, you can pass a Test to a function expecting a
string, but not vice-versa.
Re: Implicit conversion with ctor like C++
OK that's very clear thank you for the answer.
Re: What is "FilterResult" type?
On Tuesday, September 08, 2015 11:08:57 Bahman Movaqar via Digitalmars-d-learn wrote: > However, I have made this a strict practice of mine to specify > the full signature of my public API. If your API returns ranges, that's general not only bad practice but arguably impossible. Most range-based functions purposefully return Voldemort types (the type is declared inside of the function, meaning that you cannot name it). FilterResult really should be to, but I think that it's not in order to work around a bug. Regardless, it's private and should never be used explicitly. If you want to put a range type in an API, you're forced to do stuff like typeof(rangeFunc!someFunc(SomeOtherRange.init)) myFunc(int); If you're returning a range, you should be returning auto. The documentation should then say whether it's an input range, forward range, etc. - but you should pretty much never be using range types explicitly. Your code will become an unmaintainable, unreadable mess if you try. And really, it's unnecessary. Simply having the documentation say what sort of range it's returning is plenty. Exact types are unnecessary in this case and counterproductive. - Jonathan M Davis
Concurency wtf?
I can't seem to receive certain messages, my code is very simple
and it all works except for receiving:
in one thread I do
locate("MyMonitor").send(cast(shared)pt);
which sends the message(pt is a windows POINT structure).
In the MyMonitor spawned thread, I have
while (true)
{
POINT y;
receiveTimeout(100.msecs,
(POINT p)
{
y = p;
}
);
Thread.sleep(100.msecs);
continue;
}
Note that everything works except the matching in receiveTimeout.
(I've tired various things and simplifications to no avail).
I can send simple types like int and bool. e.g., sending a
literal works fine. My guess is the shared is causing problems
but I've tried all common sense combinations. But I have to send
shared, else send complains about sending unshared types.
Of course, the great thing is, all examples use literals and
hence not real world examples(isn't that nice?).
Please don't ask me to provide source. The issue has nothing to
do with the other code but specifically the TYPE that is being
sent. Works for some types and not others. It is almost surely
due to the shared issue, any ideas?
Re: What is "FilterResult" type?
On Tuesday, 8 September 2015 at 11:08:59 UTC, Bahman Movaqar
wrote:
However, I have made this a strict practice of mine to specify
the full signature of my public API. I suppose, if I want to
be pedantic, I have to realise the lazy value first and pass
the resulting array out. Is this correct?
If you _really_ want to specify the return type, you can import
std.range.interfaces[1] and use the appropriate return type
(e.g., InputRange!int, RandomAccessFinite!char, etc.) and then
append a `.inputRangeObject` to the end of your range chain.
Ex:
import std.algorithm;
import std.range;
InputRange!int doRangeyThings(R)(R r)
if (isInputRange!R)
{
return r.filter!(x => !(x & 1))
.map!(x => x * 2)
.inputRangeObject;
}
void main()
{
auto n = [1, 2, 3, 4];
auto m = n.doRangeyThings();
assert(is(typeof(m) == InputRange!int));
assert(m.equal([4, 8]));
}
You should use this sparingly, however. The types in
std.range.interfaces are interfaces that allow you to combine
ranges with runtime polymorphism, and you have to pay the
corresponding price for that, namely, you'll be hitting the GC
and the virtual functions entail a speed hit.
1. http://dlang.org/phobos/std_range_interfaces.html
Implicit conversion with ctor like C++
Hi everybody,
I would like to use implicit conversion like this:
//Sample class
class MyClass
{
this(string MyValue){...}
}
//Called function
void MyFunction(Foo MyFoo){}
void main()
{
MyFunction("Hello World!"); //Failed : MyFunction not
callable...
}
I saw in forum this is OK because D doesn't do implicit
conversion with ctor like C++
But how can I do ? May I use alias ?
Thank you for your attention.
Re: Is D suitable for my latest project?
On Monday, 7 September 2015 at 07:57:07 UTC, Kagamin wrote: On Sunday, 6 September 2015 at 15:15:03 UTC, chris stevens wrote: I guess you're right it wouldn't be too difficult to do it all using strings. The code generation I'd done before in c# I'd used some 3rd person library where you build up an object model rather than using strings. Maybe with dparse you can construct an AST and later convert it to string. Thanks for the reply Kagamin, just had a quick look at dparse and not sure how I could use it in the way you describe. Any examples of this?
Re: Is D suitable for my latest project?
On Tuesday, 8 September 2015 at 19:30:16 UTC, chris stevens wrote: On Sunday, 6 September 2015 at 14:45:45 UTC, BBasile wrote: You have Object.factory for this. You can also use a custom factory based on string comparison. (with some: static if(condition) return new This; else static if(otherCondition) return new That; etc). I just had a look at Object.factory and this isn't actually what I wanted. I was looking for something that would allow me to create new (previously undefined) classes in D at runtime that I could then use with Object.factory to create instances of. I think I can do this with Variants and dynamic, is this possible? Or is there another way? No, it's not possible with variants. What you want to do is actually complex and won't be solved here. To create a new class instance, the runtime needs the TypeInfo class for the class type. Why ? because for example if in a class declaration you declare an int initially equal to 1, the TypeInfo class provide the memory layout that matches to this initital value. For example this is how class instances are creates in D: https://github.com/D-Programming-Language/druntime/blob/master/src/rt/lifetime.d#L71 --- extern (C) Object _d_newclass(const ClassInfo ci) --- without the 'ClassInfo' parameter, you can't get the initial state of a class. This is what the runtime needs to create a class instance.
Re: Is D suitable for my latest project?
On Tuesday, 8 September 2015 at 19:30:16 UTC, chris stevens wrote: On Sunday, 6 September 2015 at 14:45:45 UTC, BBasile wrote: You have Object.factory for this. You can also use a custom factory based on string comparison. (with some: static if(condition) return new This; else static if(otherCondition) return new That; etc). I just had a look at Object.factory and this isn't actually what I wanted. I was looking for something that would allow me to create new (previously undefined) classes in D at runtime that I could then use with Object.factory to create instances of. I think I can do this with Variants and dynamic, is this possible? Or is there another way? "Previously undefined". As far as I know, this is impossible in D. Thr compiler has to know how much memory to allocate/request and it has to know that at compiletime (else it wouldn't be the compiler!) This functionality in Java/C# is possible because it's running on a vm that allows special instructions to make the vm compile and make available a class dynamically (and by extension, slowly)
Re: Status of Win32 C++ interop
On Tuesday, 8 September 2015 at 12:56:00 UTC, Laeeth Isharc wrote: How does it work when external APIs expect objects from the C++ standard library? strings, and so on? How about funny pointer types? shared_ptr etc? std::vector, std::list? No, in current state nothing smart is supported. See https://issues.dlang.org/show_bug.cgi?id=14086
Re: OSX prompt limit
Or just take it from the man page: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/signal.3.html
Re: Why 1f.iota(100f).array returns double[] not float[]?
On Tuesday, 8 September 2015 at 12:28:07 UTC, Dominikus Dittes
Scherkl wrote:
On Tuesday, 8 September 2015 at 07:17:01 UTC, Ali Çehreli wrote:
https://github.com/D-Programming-Language/phobos/blob/master/std/range/package.d#L4630
auto iota(B, E)(B begin, E end)
if (isFloatingPoint!(CommonType!(B, E)))
{
return iota(begin, end, 1.0);
}
Such kind of stuff would better be written as
auto iota(B, E)(B begin, E end)
{
return iota(begin, end, cast(CommonType!(B, E))1.0);
}
this doesn't need a constraint anymore, or maybe use
if(isNumeric!(CommonType!(B, E)))
I tend to use the above kind of cast often, because I like to
work with ubyte or ushort, and every f***ing number literal
changes the type to uint :-/
Even better, use D's universal construction feature.
auto iota(B, E)(B begin, E end)
{
return iota(begin, end, CommonType!(B, E)(1.0));
}
Re: OSX prompt limit
On 9/8/15 9:20 AM, Adam D. Ruppe wrote: On Tuesday, 8 September 2015 at 13:17:31 UTC, Ola Fosheim Grøstad wrote: Or just take it from the man page: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/signal.3.html ah excellent. My web search came up with https://developer.apple.com/library/ios/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sigaction.2.html which didn't give the value! That's because it's iOS. You have to be careful with apple documentation, they look the same for both MacOS and ios, but often they are slightly different. -Steve
Re: Why 1f.iota(100f).array returns double[] not float[]?
On 9/8/15 3:17 AM, Ali Çehreli wrote:
On 09/08/2015 12:00 AM, drug wrote:
import std.array : array;
import std.range : iota;
pragma(msg, typeof(iota(1f, 100f).array)); // why double[] not float[]?
void main()
{
}
It is probably because the type of floating point literals like 1.0 is
double. Probably there is a 1.0 in iota's implementation, converting the
element type to double according to rule number 2 here:
http://dlang.org/type.html#usual-arithmetic-conversions
Yep, here it is:
https://github.com/D-Programming-Language/phobos/blob/master/std/range/package.d#L4630
auto iota(B, E)(B begin, E end)
if (isFloatingPoint!(CommonType!(B, E)))
{
return iota(begin, end, 1.0);
}
Although any such expression can become double easily, I think the
literal should be 1.0f in this case.
I think this warrants a bug report, iota with only floats as parameters
should result in floats.
-Steve
Re: OSX prompt limit
On Tuesday, 8 September 2015 at 13:17:31 UTC, Ola Fosheim Grøstad wrote: Or just take it from the man page: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/signal.3.html ah excellent. My web search came up with https://developer.apple.com/library/ios/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sigaction.2.html which didn't give the value! anyway the git is updated now
Re: Status of Win32 C++ interop
On Monday, 7 September 2015 at 18:37:49 UTC, Benjamin Thaut wrote: On Friday, 4 September 2015 at 16:19:49 UTC, Laeeth Isharc wrote: Hi Benjamin Would you be able to give a little more colour on what the limits are of interoperability for C++ with DMD master or release ? As I understand it destructors and constructors don't work, and obviously it will get tricky passing structures and classes from C++ libraries not ported to D. So, things that work really well are classes... So far I haven't found a situation where I couldn't make it work the way I wanted. Its just some work to write the D headers for the C++ classes and vise versa, because you have to duplicate everything once more. An automated tool for this would be nice, but unfotunately there is currently none. This is really very clear and helpful, and I appreciate your taking the time. I will place it on the wiki if that's okay. Library support is surely one of the largest impediments to the adoption of D, and we ought to place some emphasis on updating the documentation here: http://dlang.org/cpp_interface.html How does it work when external APIs expect objects from the C++ standard library? strings, and so on? How about funny pointer types? shared_ptr etc? std::vector, std::list? Here is one C++ library used by many in finance (at least as a backup). I think there might be a decent amount of value in making this usable from D. (Trying to put my own interests aside!) Paging Andy Smith ? http://quantlib.org/reference/_bermudan_swaption_8cpp-example.html Are there any well-known C++ libraries that you have interfaced to ? Could you give some examples of how long it takes ? Would you be able to drop me an email about something else? No contact info on your blog, but my domain is kaleidicassociates.com and my user id is laeeth@ Laeeth.
Re: OSX prompt limit
On Tuesday, 8 September 2015 at 13:02:35 UTC, Adam D. Ruppe wrote:
On Tuesday, 8 September 2015 at 06:24:12 UTC, Joel wrote:
arsd/terminal.d(1268): Error: undefined identifier 'SIGWINCH'
There's a missing value in the signal header for OSX !
Could you run this little C program for me on your Mac and let
me know the output?
---
#include
#include
int main() {
printf("%d\n", SIGWINCH);
}
---
I can't find the numeric value online either and I don't have a
mac myself to check the headers :( ugh.
28SIGWINCH discard signal Window size change
Re: How to partially forward properties of struct array member to struct (disable length property) ?
On Sunday, 6 September 2015 at 10:12:58 UTC, ParticlePeter wrote:
In the end all that I want is "just" to disable access to
array.length through vector and alias this array.
struct Vec(T, size_t n = 3)
{
T[n] data;
alias data this;
@disable @property size_t length() const;
}
void main()
{
Vec!int v;
v[0] = 1; // ok
assert(v[0] == 1); // ok
int n = v.length; // error
}
- Kenji
Re: Are there any Phobos functions to check file permissions on Windows and Posix?
On Monday, 7 September 2015 at 15:48:56 UTC, BBasile wrote: On Sunday, 6 September 2015 at 23:05:29 UTC, Jonathan M Davis For example you can retieve the flags: archive/readonly/hidden/system/indexable(?) and even if it looks writable or readable, the file won't be open at all because the ACL for the file don't include the current user account. This guy enhanced the cross-platform fox toolkit capabilities. It would be worth looking at it if you intend to write something similar. See the section 7. Superior provision of host OS facilities portably http://tnfox.sourceforge.net/TnFOX/html/main.html
Win32 function vs delegate issues with api
I have hook = SetWindowsHookEx(WH_MOUSE, , NULL, ThreadID); Proc is the standard hook proc: public extern (Windows) LRESULT Proc(int code, WPARAM wParam, LPARAM lParam) I get a type mismatch because Proc is a delegate and SetWindowsHookEx expects a function. Making proc static works but not the behavior I want since all this stuff is wrapped in a class. Is there any way to pass Proc to SetWindowsHookEx without issues of GB and such? Error: function windows.winuser.SetWindowsHookExA (int, extern (Windows) int function(int, uint, int), void*, uint) is not callable using argument types (const(int), extern (Windows) int delegate(int code, uint wParam, int lParam), void*, uint) I could cast Proc to a function, obviously, but I'll loose the delegate behavior and create problems when I try to use this inside Proc?
Re: OSX prompt limit
On Tuesday, 8 September 2015 at 13:20:20 UTC, Adam D. Ruppe wrote: On Tuesday, 8 September 2015 at 13:17:31 UTC, Ola Fosheim Grøstad wrote: Or just take it from the man page: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man3/signal.3.html ah excellent. My web search came up with https://developer.apple.com/library/ios/documentation/System/Conceptual/ManPages_iPhoneOS/man2/sigaction.2.html which didn't give the value! anyway the git is updated now Now I get the error: object.Exception@terminal.d(2745): too narrow terminal to draw It has a negative number in it. Thanks for working on it.
Re: OSX prompt limit
On Wed, Sep 09, 2015 at 12:05:52AM +, Joel via Digitalmars-d-learn wrote: > Now I get the error: What is your code calling the function? The prompt might just be too long.
Re: OSX prompt limit
On Wednesday, 9 September 2015 at 00:44:57 UTC, via
Digitalmars-d-learn wrote:
On Wed, Sep 09, 2015 at 12:05:52AM +, Joel via
Digitalmars-d-learn wrote:
Now I get the error:
What is your code calling the function? The prompt might just
be too long.
import terminal;
void main() {
auto terminal = Terminal(ConsoleOutputType.linear); // I
think I changed ConsoleOutputType from some thing else that
didn't work
auto line = terminal.getline("your prompt: ");
terminal.writeln("You wrote: ", line);
}
Re: Regression?
On Tuesday, 8 September 2015 at 07:12:52 UTC, FreeSlave wrote:
On Tuesday, 8 September 2015 at 04:04:16 UTC, Sebastiaan Koppe
wrote:
Fixed it by changing into:
```
import std.conv : text;
string json =
File("../languages.json","r").byLineCopy().joiner.text;
auto ls = json.parseJSON();
```
Why would you read file by line and then merge all into one
string? You end up with reading the whole file (well, getting
rid of line ends) anyway, so probably the more efficient
solution would be just read the whole file at once with
std.file.read and cast to string.
Thanks for your advice. But that is not what I asked for.
The question was, why doesn't this work anymore with the latest
(2.068.0 and 2.068.1) compiler:
```
auto ls =
File("../languages.json","r").byLineCopy().joiner.parseJSON();
```
It should. Right?
Re: Win32 function vs delegate issues with api
On 09/09/15 12:18 PM, Prudence wrote: I have hook = SetWindowsHookEx(WH_MOUSE, , NULL, ThreadID); Proc is the standard hook proc: public extern (Windows) LRESULT Proc(int code, WPARAM wParam, LPARAM lParam) I get a type mismatch because Proc is a delegate and SetWindowsHookEx expects a function. Making proc static works but not the behavior I want since all this stuff is wrapped in a class. Is there any way to pass Proc to SetWindowsHookEx without issues of GB and such? Error: function windows.winuser.SetWindowsHookExA (int, extern (Windows) int function(int, uint, int), void*, uint) is not callable using argument types (const(int), extern (Windows) int delegate(int code, uint wParam, int lParam), void*, uint) I could cast Proc to a function, obviously, but I'll loose the delegate behavior and create problems when I try to use this inside Proc? You have the ability to store some user info along with the pointer. Store an integer. Use a global (private) array to map the integer to the actual delegate. Use a free function as the proc function. Of course, that has some indirection thats to the lookup. You could if able to rewrite as the free-function and pass in the class as user data, you could be smart about it ;) https://github.com/Devisualization/window/blob/master/platforms/win32/devisualization/window/window.d#L384 https://github.com/Devisualization/window/blob/master/platforms/win32/devisualization/window/window.d#L401
Re: Are there any Phobos functions to check file permissions on Windows and Posix?
On Monday, 7 September 2015 at 15:48:56 UTC, BBasile wrote: On Sunday, 6 September 2015 at 23:05:29 UTC, Jonathan M Davis wrote: [...] which makes treating some of this stuff in a cross-platform fashion quite difficult. And even more with ACLs that it could be: Not to mention, Windows locks files that are open and the recommended way to handle that is to open the file and see if you get an error.
Re: OSX prompt limit
On Tuesday, 8 September 2015 at 06:24:12 UTC, Joel wrote:
arsd/terminal.d(1268): Error: undefined identifier 'SIGWINCH'
There's a missing value in the signal header for OSX !
Could you run this little C program for me on your Mac and let me
know the output?
---
#include
#include
int main() {
printf("%d\n", SIGWINCH);
}
---
I can't find the numeric value online either and I don't have a
mac myself to check the headers :( ugh.
Re: spawn X different workers & wait for results from all of them
On Sat, 05 Sep 2015 12:21:33 +0200, Robert M. Münch wrote:
> My "pieceOfWork" is not the same. So I don't have the case: Do 4 time
> this 1thing. Instead, do 1 time these 4 things.
Ah, so you want to receive one each of various types? Something like
this might work (untested):
// These could be inferred using std.traits.ReturnType
alias ResultTypes = AliasSeq!(int, float, Baz);
bool received(T) = false;
bool receivedAll()
{
foreach (T; ResultTypes)
if (!received!T) return false;
return true;
}
while (!receivedAll)
{
receive(
(int x) { received!int = true; /* other work... */ },
(float x) { received!float = true; /* other work... */ },
(Baz x) { received!Baz = true; /* other work... */ }
);
}
Re: Windows Header consts
On Tuesday, 8 September 2015 at 17:22:44 UTC, NX wrote: I have figure out typo: ...I had to figure out...
Re: Windows Header consts
On Monday, 7 September 2015 at 19:06:48 UTC, Prudence wrote: It's called encapsulation. Do you have any idea how much I struggled when I try to use enums in OpenTK library because they were "encapsulated" ? Whenever I read OpenGL tutorials I have figure out which enum-name they used as container...
Re: What is "FilterResult" type?
On Tuesday, 8 September 2015 at 11:08:59 UTC, Bahman Movaqar wrote: However, I have made this a strict practice of mine to specify the full signature of my public API. I suppose, if I want to be pedantic, I have to realise the lazy value first and pass the resulting array out. Is this correct? Yes, using an array will work here, but if you are designing a library then I'd prefer that you don't force me into being non lazy where I could be just because you want to have a clear type: laziness is a virtue, reducing possibilities isn't a great idea. What I would do is a designated wrapper template which will give you a clear type while still being lazy: exactly what FilterResult and MapResult are.
