Re: Bug in Rdmd?
On Tuesday, 14 June 2016 at 03:40:01 UTC, Adam D. Ruppe wrote: On Tuesday, 14 June 2016 at 03:15:04 UTC, Jonathan Marler wrote: It actually is a free function no, it isn't, it is on File. Your code doesn't compile on my dmd (and indeed it shouldn't on yours either unless you have a version mismatch. rdmd just calls dmd, it doesn't produce its own errors) Shoot stupid mistake. You were right Jeremy and Adam. Thanks for replying and showing me my silly error. I could have sworn byLine was a template and calling it with file was just UFCS...and I don't know how I was able to compile that with DMD...must have made a mistake somewhere. Thanks again.
Re: Bug in Rdmd?
On Tuesday, 14 June 2016 at 03:15:04 UTC, Jonathan Marler wrote: It actually is a free function no, it isn't, it is on File. Your code doesn't compile on my dmd (and indeed it shouldn't on yours either unless you have a version mismatch. rdmd just calls dmd, it doesn't produce its own errors)
Re: Bug in Rdmd?
On Tuesday, 14 June 2016 at 01:35:32 UTC, Jeremy DeHaan wrote:
On Tuesday, 14 June 2016 at 01:05:46 UTC, Jonathan Marler wrote:
This code doesn't seem to work with rdmd. Is this a bug?
import std.stdio : byLine;
int main(string[] args)
{
foreach(line; stdin.byLine) {
}
return 0;
}
Compiler Output:
Error: module std.stdio import 'byLine' not found
Try removing the 'byLine' from the import statement. The error
message looks like it can't find the function 'byLine' in the
std.stdio module. It isn't a free function, but one of File's
methods.
It actually is a free function (not a method on the File object).
This works if you compile it with dmd, just not with rdmd.
Bug in Rdmd?
This code doesn't seem to work with rdmd. Is this a bug?
import std.stdio : byLine;
int main(string[] args)
{
foreach(line; stdin.byLine) {
}
return 0;
}
Compiler Output:
Error: module std.stdio import 'byLine' not found
nested inout return type
I'm writing a custom (originally multi-dimensional) Slice-type,
analogous to the builtin T[], and stumbled upon the problem that
the following code won't compile. The workaround is simple: just
write the function three times for mutable/const/immutable. But
as "inout" was invented to make that unneccessary I was wondering
if there is a clever way to make this work.
struct Slice(T)
{
T* ptr;
size_t length;
Slice!(inout(T)) opSlice(size_t a, size_t b) inout
{
return Slice!(inout(T))(ptr+a, b-a);
}
}
how to get rid of "cannot deduce function from argument types" elegantly
I made a small (could be reduced further) example that creates and walks
a templated binary tree. The tree also gets a factory function to use
type deduction to conveniently construct a tree. Unfortunately this does
not compile, if I remove the three ugly methods between /* these should
go */ comments.
```
fibertest.d(49): Error: template fibertest.tree cannot deduce function
from argument types !()(int, typeof(null), typeof(null)), candidates are:
fibertest.d(41):fibertest.tree(T)(T node, Tree!T left, Tree!T right)
```
Is there a more elegant way to fix this?
Another fix would be to provide 4 factory functions like this (still not
really nice):
```
tree(Tree!T left, T node, Tree!T right) {...}
tree(T node, Tree!T right) {...}
tree(Tree!T left, T node) {...}
tree(T node) {...}
```
```d
import std.concurrency, std.stdio, std.range;
class Tree(T) {
Tree!T left;
T node;
Tree!T right;
this(Tree!T left, T node, Tree!T right) {
this.left = left;
this.node = node;
this.right = right;
}
auto inorder() {
return new Generator!T(() => yieldAll(this));
}
private void yieldAll(Tree!T t) {
if (t is null) return;
yieldAll(t.left);
yield(t.node);
yieldAll(t.right);
}
}
/* these should go */
Tree!T tree(T)(typeof(null) left, T node, typeof(null) right) {
return new Tree!T(null, node, null);
}
Tree!T tree(T)(Tree!T left, T node, typeof(null) right) {
return new Tree!T(left, node, null);
}
Tree!T tree(T)(typeof(null) left, T node, Tree!T right) {
return new Tree!T(null, node, right);
}
/* these should go */
Tree!T tree(T)(Tree!T left, T node, Tree!T right) {
return new Tree!T(left, node, right);
}
void main(string[] args) {
// /3
// /2
// 1
auto t1 = tree(tree(tree(null, 1, null), 2, null), 3, null);
// 1
// \2
//\3
auto t2 = tree(null, 1, tree(null, 2, tree(null, 3, null)));
writeln(t1.inorder());
writeln(t2.inorder());
writeln(t1.inorder().array == t2.inorder().array);
}
```
Re: Gotchas for returning values from blocks
On Monday, 13 June 2016 at 14:16:58 UTC, jmh530 wrote: So returning a reference to something on the stack is a bad idea, but copying the value would be fine. This is easy enough to get wrong elsewhere too. I recall having an issue with a foreach, until I added a 'ref' to it. Looking at the addresses all pointing to the same spot (the temporary) which can add curiously subtle bugs, or blatantly obvious ones.
Re: Parse File at compile time, but not embedded
On Sunday, 12 June 2016 at 01:39:11 UTC, Joerg Joergonson wrote: This doesn't seem to be the case though in more complex examples ;/ it is. My code is almost identical do what you have written your code is *completely* different. that's why there are no traces of CTFE values in my sample. it's not that hard to find out that my code has no functions at all, so no code for 'em can be generated.
Re: What's up with GDC?
On Monday, 13 June 2016 at 16:46:38 UTC, Adam D. Ruppe wrote: On Sunday, 12 June 2016 at 14:22:54 UTC, Joerg Joergonson wrote: Error: undefined identifier 'Sleep' in module 'core.thread', did you mean function 'Sleep'? It is supposed to be `Thread.sleep(1.seconds);` I'm pretty sure the capital Sleep() is supposed to be private (that is the OS-specific Windows api call). Ok, I tried both and Sleep was the one that worked for some odd ball reason. Then it seemed to stop working I think(I tried it in a different spot)... maybe user error. Basically keeping the event loop uses around 12% cpu and 12MB of memory. That's weird, it just sleeps until a message comes in from the OS. On my computer, programs sit at 0% like you'd expect, and my guitest program (which has text areas, buttons, menu, etc) eats ~1.7 MB, both 32 and 64 bit versions. Are you running some other program that might be sending a lot of broadcast messages? Not that I know of. I haven't tried running it outside VS though so it might be doing something weird. I'll investigate further when I get a chance and get further down the road. About the WM size thing, I haven't had a problem with it except for the weird vertical shifting. It doesn't use any more cpu when constantly resizing.
Re: Access private member
On 2016-06-13 17:00, Basile B. wrote: Unless It's you Jacob who have proposed Orange to phobos in 2012. And then since refused it's not developed at all. IIRC it's even not possible to compile it with DUB. Yes, I've written Orange and proposed it to Phobos. Not sure what you mean with "refused" and "not developed". Orange is a part of Mambo [1] which is avilable using Dub [2]. [1] https://github.com/jacob-carlborg/mambo/tree/master/mambo/serialization [2] http://code.dlang.org/packages/mambo -- /Jacob Carlborg
Re: Accessing COM Objects
On Monday, 13 June 2016 at 19:11:59 UTC, John wrote: On Monday, 13 June 2016 at 17:38:41 UTC, Incognito wrote: Cool. Oleview gives me the idl files. How to convert the idl files to d or possibly c? Would I just use them in place of IUnknown once I have the interface? In OleView you can save the IDL file, then run another tool, midl.exe, on the IDL file. That will generate the C headers. But you'd then have to translate that to D by hand. I have written a tool that takes a COM type library and automatically converts it to a D source file. I could finish it off over the next few days and put the source on GitHub if you're interested. That would be great! With it I might be able to put a nice wrapper around Photoshop for use with D. Others mind find it useful too as other programs still use COM.
Re: Accessing COM Objects
On Monday, 13 June 2016 at 17:38:41 UTC, Incognito wrote: Cool. Oleview gives me the idl files. How to convert the idl files to d or possibly c? Would I just use them in place of IUnknown once I have the interface? In OleView you can save the IDL file, then run another tool, midl.exe, on the IDL file. That will generate the C headers. But you'd then have to translate that to D by hand. I have written a tool that takes a COM type library and automatically converts it to a D source file. I could finish it off over the next few days and put the source on GitHub if you're interested.
Re: What's up with GDC?
On Saturday, 11 June 2016 at 04:20:38 UTC, Joerg Joergonson wrote: BTW I make your code a bit better with resizing case WM_SIZING: goto size_changed; break; I left that out intentionally because it lagged on my computer... so I wanted it to stay blank. Maybe it can be made more efficient though.
Re: Accessing COM Objects
On Monday, 13 June 2016 at 07:40:09 UTC, John wrote:
On Monday, 13 June 2016 at 01:22:33 UTC, Incognito wrote:
I've been reading over D's com and can't find anything useful.
It seems there are different ways:
http://www.lunesu.com/uploads/ModernCOMProgramminginD.pdf
which is of no help and requires an idl file, which I don't
have.
Then theres this
http://wiki.dlang.org/COM_Programming
which is also of no help:
import std.stdio;
import std.stdio, core.sys.windows.com,
core.sys.windows.windows, std.exception, std.meta, std.traits;
import std.utf, core.stdc.stdlib, core.sys.windows.objidl,
core.sys.windows.ole2;
pragma(lib, "ole32.lib");
GUID Guid(string str)()
{
static assert(str.length==36, "Guid string must be 36
chars long");
enum GUIDstring = "GUID(0x" ~ str[0..8] ~ ", 0x" ~
str[9..13] ~ ", 0x" ~ str[14..18] ~
", [0x" ~ str[19..21] ~ ", 0x" ~ str[21..23] ~ ", 0x"
~ str[24..26] ~ ", 0x" ~ str[26..28]
~ ", 0x" ~ str[28..30] ~ ", 0x" ~ str[30..32] ~ ", 0x"
~ str[32..34] ~ ", 0x" ~ str[34..36] ~ "])";
return mixin(GUIDstring);
}
int main(string[] argv)
{
// Adobe Photoshop App 9.0 CLSID
{c09f153e-dff7-4eff-a570-af82c1a5a2a8}
// Adobe Photoshop App 9.1 CLSID
{6DECC242-87EF-11cf-86B4-44455354}
auto CLSID_DOMDocument60 =
Guid!("6DECC242-87EF-11cf-86B4-44455354");
auto iid = IID_IUnknown;
void* pUnk;
auto hr = CoCreateInstance(_DOMDocument60, null,
CLSCTX_ALL, , );
if (FAILED(hr))
throw new Exception("Error!");
writeln("Hello D-World!");
return 0;
}
Maybe my CLSID's are wrong. Got them from the registry. The
exception triggers each time. Even if it worked, I wouldn't
know how to use it.
I can do this stuff in C# by simply dragging and dropping a
dll into the references and it works fine but is a bit slow. I
was hoping I could speed things up using D but it seems like
COM isn't really supported, despite what several references
say.
COM is supported in D. The difference is that C# hides all the
plumbing behind nice classes.
You're going to need Photoshop's COM interface to do anything
with it. If you don't have a C header that you can translate
into D, you could use a tool included in the Windows SDK called
OleView. It will peek inside COM libraries and give you the
interface definitions.
As to why CoCreateInstance isn't working, make sure you're
calling CoInitialize or CoInitializeEx beforehand. If it's
still failing, use std.windows.syserror.sysErrorString(hr) to
see if it gives you a reason. Otherwise, CLSCTX_ALL might be
the culprit - try using CLSCTX_SERVER instead.
Cool. Oleview gives me the idl files. How to convert the idl
files to d or possibly c?
Would I just use them in place of IUnknown once I have the
interface?
Re: Access private member
On Monday, 13 June 2016 at 15:00:06 UTC, Basile B. wrote: On Monday, 13 June 2016 at 14:30:13 UTC, Basile B. wrote: On Monday, 13 June 2016 at 11:27:31 UTC, Jacob Carlborg wrote: On 2016-06-13 09:54, Pierre wrote: Thank you i will try it. You don't need to involve the constructor. You can use .tupleof, as I mentioned [1] [2]. [1] http://forum.dlang.org/post/njlohq$1n99$1...@digitalmars.com [2] http://forum.dlang.org/post/njlop0$1ngk$1...@digitalmars.com I understand that web devels needs to dump 47 bytes and send them at 8759 miles in 200 ms, but this serialization scheme is not good for object streaming, e.g store a full GUI in a resource file. Nobody will ever use flatbuffer or message pack to store a GUI...lol. oops I think I've replied to another thread on another board :/ Unless It's you Jacob who have proposed Orange to phobos in 2012. And then since refused it's not developed at all. IIRC it's even not possible to compile it with DUB. https://www.youtube.com/watch?v=YJO4-aa6PCI=PLuhnsen8iS5ltHofd21TWBx-bqmR9V8RU=14=False now you know the origin of the hat ;)
Re: What's up with GDC?
On Sunday, 12 June 2016 at 14:22:54 UTC, Joerg Joergonson wrote: Error: undefined identifier 'Sleep' in module 'core.thread', did you mean function 'Sleep'? It is supposed to be `Thread.sleep(1.seconds);` I'm pretty sure the capital Sleep() is supposed to be private (that is the OS-specific Windows api call). Basically keeping the event loop uses around 12% cpu and 12MB of memory. That's weird, it just sleeps until a message comes in from the OS. On my computer, programs sit at 0% like you'd expect, and my guitest program (which has text areas, buttons, menu, etc) eats ~1.7 MB, both 32 and 64 bit versions. Are you running some other program that might be sending a lot of broadcast messages? Do you know if there is a way to get the largest used memory chunks and what is using them? That might tell the story! idk
Re: Access private member
On Monday, 13 June 2016 at 14:30:13 UTC, Basile B. wrote: On Monday, 13 June 2016 at 11:27:31 UTC, Jacob Carlborg wrote: On 2016-06-13 09:54, Pierre wrote: Thank you i will try it. You don't need to involve the constructor. You can use .tupleof, as I mentioned [1] [2]. [1] http://forum.dlang.org/post/njlohq$1n99$1...@digitalmars.com [2] http://forum.dlang.org/post/njlop0$1ngk$1...@digitalmars.com I understand that web devels needs to dump 47 bytes and send them at 8759 miles in 200 ms, but this serialization scheme is not good for object streaming, e.g store a full GUI in a resource file. Nobody will ever use flatbuffer or message pack to store a GUI...lol. oops I think I've replied to another thread on another board :/ Unless It's you Jacob who have proposed Orange to phobos in 2012. And then since refused it's not developed at all. IIRC it's even not possible to compile it with DUB.
Re: Access private member
On Monday, 13 June 2016 at 11:27:31 UTC, Jacob Carlborg wrote: On 2016-06-13 09:54, Pierre wrote: Thank you i will try it. You don't need to involve the constructor. You can use .tupleof, as I mentioned [1] [2]. [1] http://forum.dlang.org/post/njlohq$1n99$1...@digitalmars.com [2] http://forum.dlang.org/post/njlop0$1ngk$1...@digitalmars.com I understand that web devels needs to dump 47 bytes and send them at 8759 miles in 200 ms, but this serialization scheme is not good for object streaming, e.g store a full GUI in a resource file. Nobody will ever use flatbuffer or message pack to store a GUI...lol.
Re: Gotchas for returning values from blocks
On Monday, 13 June 2016 at 01:41:07 UTC, Mike Parker wrote:
Everything works fine in your example because 'new' always
allocates on the heap. Anything allocated on the stack is not
guaranteed to be valid after the scope exits:
struct Foo
{
int baz;
~this() { baz = 1; }
}
void main()
{
import std.stdio : writeln;
Foo* foo;
{
Foo bar = Foo(10);
foo =
}
//bar is now out of scope
assert(foo.baz == 10);
}
Struct constructors are always run when exiting a scope. More
importantly, the pointer to bar is only valid until the stack
address where it lives is overwritten by another stack
allocation. In this example, there's no chance for that to
happen before I access it, but it could happen at any time.
So returning a reference to something on the stack is a bad idea,
but copying the value would be fine.
Re: Access private member
On 2016-06-13 09:54, Pierre wrote: Thank you i will try it. You don't need to involve the constructor. You can use .tupleof, as I mentioned [1] [2]. [1] http://forum.dlang.org/post/njlohq$1n99$1...@digitalmars.com [2] http://forum.dlang.org/post/njlop0$1ngk$1...@digitalmars.com -- /Jacob Carlborg
Re: Access private member
On Monday, 13 June 2016 at 07:53:08 UTC, Jacob Carlborg wrote: On 2016-06-13 09:49, Jacob Carlborg wrote: For fields, used .tupleof, for other symbols, use a pointer. Here's an example [1] of accessing a field using the name of the field as a string. It will bypass private. That module [1] contains some generic functionality for working with fields which you would need for serialization. Or you can use the whole serialization library directly [2] ;) [1] https://github.com/jacob-carlborg/orange/blob/master/orange/util/Reflection.d#L123 [2] https://github.com/jacob-carlborg/orange There's also the IZ serializer. It's based on accessors (called property descriptor) to read and write private or protected fields. Actually it's never a good idea to directly access them. Usually they're not hidden for anything (e.g the count of items in a list, the setter update the list...) pd: https://github.com/BBasile/iz/blob/master/import/iz/properties.d ser: https://github.com/BBasile/iz/blob/master/import/iz/serializer.d
Re: Access private member
On 2016-06-13 09:49, Jacob Carlborg wrote: For fields, used .tupleof, for other symbols, use a pointer. Here's an example [1] of accessing a field using the name of the field as a string. It will bypass private. That module [1] contains some generic functionality for working with fields which you would need for serialization. Or you can use the whole serialization library directly [2] ;) [1] https://github.com/jacob-carlborg/orange/blob/master/orange/util/Reflection.d#L123 [2] https://github.com/jacob-carlborg/orange -- /Jacob Carlborg
Re: Access private member
Thank you i will try it.
Re: Access private member
On 2016-06-13 09:43, Pierre wrote: Hi, I would like to know how can i access private member of class from outside ? I think about serialization for instance, serializer must have access to protected attributes. How this is done ? Thank you. For fields, used .tupleof, for other symbols, use a pointer. -- /Jacob Carlborg
Re: Access private member
On Monday, 13 June 2016 at 07:43:09 UTC, Pierre wrote: Hi, I would like to know how can i access private member of class from outside ? I think about serialization for instance, serializer must have access to protected attributes. How this is done ? Thank you. You can perform the introspection in the class itself, e .g in the __ctor.
Access private member
Hi, I would like to know how can i access private member of class from outside ? I think about serialization for instance, serializer must have access to protected attributes. How this is done ? Thank you.
Re: Accessing COM Objects
On Monday, 13 June 2016 at 01:22:33 UTC, Incognito wrote:
I've been reading over D's com and can't find anything useful.
It seems there are different ways:
http://www.lunesu.com/uploads/ModernCOMProgramminginD.pdf
which is of no help and requires an idl file, which I don't
have.
Then theres this
http://wiki.dlang.org/COM_Programming
which is also of no help:
import std.stdio;
import std.stdio, core.sys.windows.com,
core.sys.windows.windows, std.exception, std.meta, std.traits;
import std.utf, core.stdc.stdlib, core.sys.windows.objidl,
core.sys.windows.ole2;
pragma(lib, "ole32.lib");
GUID Guid(string str)()
{
static assert(str.length==36, "Guid string must be 36 chars
long");
enum GUIDstring = "GUID(0x" ~ str[0..8] ~ ", 0x" ~
str[9..13] ~ ", 0x" ~ str[14..18] ~
", [0x" ~ str[19..21] ~ ", 0x" ~ str[21..23] ~ ", 0x" ~
str[24..26] ~ ", 0x" ~ str[26..28]
~ ", 0x" ~ str[28..30] ~ ", 0x" ~ str[30..32] ~ ", 0x"
~ str[32..34] ~ ", 0x" ~ str[34..36] ~ "])";
return mixin(GUIDstring);
}
int main(string[] argv)
{
// Adobe Photoshop App 9.0 CLSID
{c09f153e-dff7-4eff-a570-af82c1a5a2a8}
// Adobe Photoshop App 9.1 CLSID
{6DECC242-87EF-11cf-86B4-44455354}
auto CLSID_DOMDocument60 =
Guid!("6DECC242-87EF-11cf-86B4-44455354");
auto iid = IID_IUnknown;
void* pUnk;
auto hr = CoCreateInstance(_DOMDocument60, null,
CLSCTX_ALL, , );
if (FAILED(hr))
throw new Exception("Error!");
writeln("Hello D-World!");
return 0;
}
Maybe my CLSID's are wrong. Got them from the registry. The
exception triggers each time. Even if it worked, I wouldn't
know how to use it.
I can do this stuff in C# by simply dragging and dropping a dll
into the references and it works fine but is a bit slow. I was
hoping I could speed things up using D but it seems like COM
isn't really supported, despite what several references say.
COM is supported in D. The difference is that C# hides all the
plumbing behind nice classes.
You're going to need Photoshop's COM interface to do anything
with it. If you don't have a C header that you can translate into
D, you could use a tool included in the Windows SDK called
OleView. It will peek inside COM libraries and give you the
interface definitions.
As to why CoCreateInstance isn't working, make sure you're
calling CoInitialize or CoInitializeEx beforehand. If it's still
failing, use std.windows.syserror.sysErrorString(hr) to see if it
gives you a reason. Otherwise, CLSCTX_ALL might be the culprit -
try using CLSCTX_SERVER instead.
Re: Fibers, what for?
On Monday, 13 June 2016 at 00:57:11 UTC, Alex Parrill wrote: This is misleading. Any sort of cooperative system needs synchronization when two or more tasks try to access the same data, whether those "tasks" are OS threads, fibers, different machines on a network, etc. That is true. Sorry. What I meant is that with fibers the yield is performed in well defined locations it could be in blocking calls like read() or write() or when yield is called. For this reason it is simpler to synchronize access to shared ressources with fibers than with threads. It's thus POSSIBLE to write code that doesn't need synchronization even when shared ressources are used. Note also that the synchronization mechanism can be much simpler and efficient than the one needed with threads. With threads you MUST allways synchronize access to shared ressources and protect critical sections of your code, or use specially crafted none blocking data structures using atomic operations.
