Re: RSA library
On Thursday, 18 August 2016 at 14:29:54 UTC, Adam D. Ruppe wrote: On Thursday, 18 August 2016 at 09:00:58 UTC, Andre Pany wrote: Is there a D library which can be built with a plain x86 DMD and without dll dependencies? Not that I know of, and I don't think the win32 api includes rsa256 (though .net does!). The botan lib though, why doesn't it work on 32 bit optlink? You might be able to hack it by just taking the algorithms you need and compiling yourself. It is a statement from the botan github readme, maybe due to a dependency. I will try the windows api, from the description it seems exactly what i need. I will also check wheter the specific botan part could be extracted. Thanks a lot. Kind regards Andre
Re: string mixin and alias
On Friday, 29 July 2016 at 18:39:23 UTC, Jesse Phillips wrote:
On Friday, 29 July 2016 at 18:34:56 UTC, Jesse Phillips wrote:
Here the generateCode() is mixed in to the context of foo(),
which is fine if your code is performing actions but is no
good if you're creating declarations that you want to use in
the context of main().
Here is a fully functioning example:
---
string generateCode(string s){return s;}
void main()
{
int a, b;
enum s = "a = 2 + 3; b = 4 + a;";
foo!(s)(a, b);
assert(a == 5);
assert(b == 9);
}
void foo(alias s)(ref int a, ref int b) {
mixin(generateCode(s));
}
---
Thanks for all the answers.
Kind regards
Andre
Re: JSONValue floating and 42
On Tuesday, 19 April 2016 at 13:58:05 UTC, Edwin van Leeuwen wrote: On Tuesday, 19 April 2016 at 13:44:08 UTC, Andre wrote: -> I need to analyze every value whether it is a floating or an integer? This is the correct option. Something like: double f; if (j["value"].type == JSON_TYPE.INTEGER) f = j["value"].integer.to!float; else f = j["value"].floating; There are also a number of libraries available that make dealing with json a bit easier: code.dlang.org/search?q=json I will do so. Thanks. Kind regards André
JSONValue floating and 42
Hi,
I have to deal with a JSON like this
[{"value":42},{"value":1e+100}]
Value is a floating number, but the providing system does not
write 42 as 42.00.
While trying to get the value with .floating, I get an exception
because 42 is not
a floating value.
I try to understand what is the issue here.
-> Does the system violates the JSON Standard, and it should
deliver 42.00?
-> .floating should be enhanced to handle 42?
-> I need to analyze every value whether it is a floating or an
integer?
Kind regards
André
Re: Some strange behaviors of enums and string.startsWith
On Friday, 8 April 2016 at 14:56:51 UTC, Adam D. Ruppe wrote: On Friday, 8 April 2016 at 14:38:10 UTC, Andre wrote: Therefore I use std.conv.text to convert the string enum? to string. That converts the *name* of the enum to string, not the contents. (BTW, I think the name of the enum is actually the more useful behavior.) Use cast(string) if you want to get the content out. Thanks a lot, now the behavior makes sense. I will create a feature request for the phobos issue. Kind regards André
Some strange behaviors of enums and string.startsWith
Hi,
I have some issues with enums. Please have a look at the last 3
assertions.
It is annoying that I cannot directly use my StringEnum for
startsWith.
Therefore I use std.conv.text to convert the string enum? to
string.
But then the assertion fails, that is very strange, it fails only
for string ":" but
not for string "b".
Is this a bug? => Tested with DMD 2.071 on windows.
Kind regards
André
enum ManifestConst = ":";
enum CharEnum { a = ':' }
enum StringEnum{a = ":", b = "b"}
import std.string: startsWith, endsWith;
import std.conv: text;
void main()
{
assert( ":abc".startsWith(CharEnum.a)); // OK
assert( ":abc".startsWith(ManifestConst)); // OK
//assert( "abc".startsWith(StringEnum.a)); // Compiler error
assert( ":abc".startsWith(StringEnum.a.text)); // Assertion
failure
assert( "bc".startsWith(StringEnum.b.text)); // OK ???
}
Re: Issue with 2.071: Regression or valid error?
On Wednesday, 6 April 2016 at 19:22:44 UTC, Daniel Kozak wrote: This should not compile. Cat cant access create because it is private. Ok it can access it but only if you move cat into same module as animal Dne 6. 4. 2016 17:16 napsal uživatel "Andre via Digitalmars-d-learn" < digitalmars-d-learn@puremagic.com>: Thanks for the answers. Kind regards André
Issue with 2.071: Regression or valid error?
Hi,
With 2.071 following coding does not compile anymore and somehow
I feel it should compile.
The issue is with line "cat.create();".
Cat is a sub type of Animal. Animal "owns" method create and I
want to call the method
create within the class Animal for cat.
Is the error message "no property create for type 'b.cat'" valid
or not?
Kind regards
André
module a;
import b;
class Animal
{
private void create() {}
void foo(Cat cat)
{
cat.create(); // >> no property create for type 'b.cat'
}
}
void main() {}
--
module b;
import a;
class Cat: Animal {};
compile with
rdmd a b
Re: dub, copyFiles and linux
OK solved;) Shared libraries doesn't need to be mentioned in libs section in dub. Therefore copying after the linking is correct and is working fine. Kind regards André
Re: dub, copyFiles and linux
On Thursday, 31 March 2016 at 04:57:01 UTC, Andre wrote: I can't see why it is working with vibe-d projects (openssl libraries copied to application folder) but not for my project. There is no console output "copying files for..." while using dub for my application project. What is wrong? Kind regards André OK, I see copying files is triggered after the linking process. That is bad...
dub, copyFiles and linux
Hi,
I created a library which uses some shared objects. The dub.json
looks like this:
{
"name": "sec",
"configurations": [
{
"name": "debug",
"targetType": "library",
"copyFiles":["lib/libssoext.so","lib/librypto.so"],
"libs-posix": ["ssoext"],
"lflags":["-L./.","-rpath=./."],
}
]
}
Within my project folder, there is a folder lib with the 2 so
files.
Within my application project, I use this library. The dub.sdl
looks like this:
name "demo"
targetName "app"
dependency "sec" version=">=0.0.1"
I would expect, while dub is compiling my application project,
the 2 libs are
copied to my application folder. But that is not working.
I can't see why it is working with vibe-d projects (openssl
libraries copied to application folder) but not for my project.
There is no console output "copying files for..." while using dub
for my application project.
What is wrong?
Kind regards
André
Re: Usage of custom class with JSONValue
On Thursday, 24 March 2016 at 16:03:13 UTC, Edwin van Leeuwen wrote: On Thursday, 24 March 2016 at 11:39:13 UTC, arturg wrote: isnt alias this supposed to do this implicitly? convert this auto jsValue = JSONValue(new MyClass()); into this auto jsValue = JSONValue((new MyClass())._data); Good point, I did not catch that. That indeed should work and seems to be a bug. Does it work if _data is a base type (string or int, etc..) Thanks for the answers. I also wonder why alias this does not the job. Unfortunatelly even if it works, the _data is not the data I want to be used as value for JSONValue. _data only contains keys, the values are stored in another variable. JSONValue should contain both. I hoped there is some operator overloading for implicit conversion of my class to JSONValue. I solved the issue with an toJSON method and a generic functionality which checks for this method. Kind regards André
Usage of custom class with JSONValue
Hi,
I have a class which has already an alias this to a string array,
so I can use it in a foreach loop.
class MyClass
{
string[] _data;
alias _data this;
// ...
}
void main()
{
import std.json;
auto jsValue = JSONValue(new MyClass());
}
For some generic code I need an implicit conversion of MyClass so
I can
use it for a JSONValue. For the coding above I receive a compiler
error:
static assert "unable to convert type "MyClass" to json"
Is there anything I can do?
Kind regards
André
Re: Determine decimal separator (comma vs point)
On Monday, 7 March 2016 at 12:29:39 UTC, Andre wrote:
Hi,
I execute an external application and get some decimal numbers:
auto p = execute(["curl", "-o", "/dev/null", "-s", "-w",
"%{time_namelookup}:%{time_appconnect}:%{time_redirect}:%{time_starttransfer}:%{time_pretransfer}:%{time_connect}:%{time_total}",
url]);
On my windows system, the decimal separator is "," therefore I
want
to replace the "," with "." to avoid exceptions while
converting the value to!double.
I thought following coding should return "," on my OS because
it is set in the region settings but "." is returned:
import core.stdc.locale;
auto lConv = localeconv();
char decSeparator = *lConv.decimal_point;
How can I determine the correct decimal separator?
Kind regards
André
I just found the answer:
lconv* lc;
setlocale(LC_NUMERIC, "");
lc = localeconv();
writeln(to!string(lc.decimal_point));
Determine decimal separator (comma vs point)
Hi,
I execute an external application and get some decimal numbers:
auto p = execute(["curl", "-o", "/dev/null", "-s", "-w",
"%{time_namelookup}:%{time_appconnect}:%{time_redirect}:%{time_starttransfer}:%{time_pretransfer}:%{time_connect}:%{time_total}",
url]);
On my windows system, the decimal separator is "," therefore I
want
to replace the "," with "." to avoid exceptions while converting
the value to!double.
I thought following coding should return "," on my OS because it
is set in the region settings but "." is returned:
import core.stdc.locale;
auto lConv = localeconv();
char decSeparator = *lConv.decimal_point;
How can I determine the correct decimal separator?
Kind regards
André
Re: Issues
On Tuesday, 23 February 2016 at 19:53:52 UTC, Johan Engelen wrote: On Monday, 22 February 2016 at 23:21:28 UTC, Jonathan M Davis wrote: Well, if you'll notice th list of resolved issues is going up way faster than the list of new issues. (To put some oil on the fire:) But the number of new issues /is/ going up. I.e. the number of resolved issues is going way up, the number of new new issues is going way way up. That's how I read the graph. (Please help to resolve issues, rather than spending time on the forum talking about it ;) :-) For me this was helpful to get an idea what's going on, how people work on/think about issues, priorities, etc. So please consider this time a little investment to get a new member more involved. I'm considering working on some easy issues first. I will ignore the enhancement requests from bearophile that have status new, no votes, no one in CC, no comments. There are more than 200 (!) of them. These issues could be valid/valuable but I just don't agree with this way of shouting requests and not following up on them. I'd rather help someone else first who is really interested in solving his own requests.
Re: Issues
On Tuesday, 23 February 2016 at 00:13:23 UTC, ag0aep6g wrote: On 22.02.2016 23:56, Andre wrote: I was wondering how people in this D community think about the number of issues with NEW status... It could scare individuals/organizations to start with D, when they get the impression that there are a large and growing number of issues that are open (for years). I know this is not a fair interpretation of what's going on, but it's a conclusion one could make. I guess my reopening of issue 4763 [1] got you here. Old issues may be embarrassing, but I believe closing them without proper resolution, just because they're old, is very bad practice. Regarding old enhancement request that never got anywhere, it's certainly tempting to just throw them away, but I think it's a bad move when a single member of the community just closes issues that have been filed by someone else. That would make for bad weather in the community. Instead, I suggest to engage in discussion with the proponent(s) of the request. Or implement the request and try to get it merged. - Is there a preferred way to clean things up? Fix stuff :P A resolution status? Not sure what kind of status you're looking for. There's WONTFIX, but you shouldn't apply it just because an issue is old. As far as I know, we don't use LATER and REMIND. A maximum time? No. - Or perhaps the bugtracker (https://dlang.org/bugstats.php) needs to be adjusted for irrelevant things.. What do you mean by "irrelevant"? If you think an issue is irrelevant, please argue your point in the comments section of the issue. Maybe all enhancement requests (that are not closely followed by an implementation) are "irrelevant"? I could understand that viewpoint, but that's not how we operate at the moment. If you want us to go in that direction, ask about it in the General group, and if there's consensus to do away with (long-lived) enhancement requests, mass-close them. By the way, I don't like the bugstats.php page all that much. Some time ago I've played around with charts and put this together: https://issues.dlang.org/chart.cgi?category=D===normal%20bugs=enhancement%20requests=major%20bugs=minor%20bugs=critical%20bugs=blockers=trivial%20bugs=regressions=101=104=100=102=99=98=103=97=98=data%20sets%20by%20severity=wrap=600=650 I think it's more interesting than the one on bugstats.php. But it doesn't go back as far - it only started counting when I created it. Then I gave up. - Or is it a non-issue and should we just ignore the tail of the list? Not ignore it, work towards reducing it by actually resolving stuff. [1] https://issues.dlang.org/show_bug.cgi?id=4763 Judging from the quick response(s) to #4763 and this question I get the impression this is an active, positive and thoughtful community. Compliments! I think your 'definition' of irrelevant is getting us somewhere: - enhancement requests - that are not closely followed by an implementation - with outdated information - empty CC - no votes - no owner I agree with your point that a single member should not close something just because it's old. On the other hand, the issuer also has a responsibility to track/coordinate/complete issues. In case of #4763 I closed it because 2 out of 3 enhancement requests were fixed/solved and the 3rd was open for about 5 years, without recent activity, no owner, empty CC and no votes. Instead, I suggest to engage in discussion with the proponent(s) of the request. Point taken, I could have asked the proponent. Or implement the request and try to get it merged. I agree with all people responding, resolving is the best way to go. About the >bugif it only shows bugs. For marketing and to challenge everyone to keep it near zero. Thanks for everyone's insights.
Issues
I was wondering how people in this D community think about the number of issues with NEW status... It could scare individuals/organizations to start with D, when they get the impression that there are a large and growing number of issues that are open (for years). I know this is not a fair interpretation of what's going on, but it's a conclusion one could make. - Is there a preferred way to clean things up? A resolution status? A maximum time? - Or perhaps the bugtracker (https://dlang.org/bugstats.php) needs to be adjusted for irrelevant things.. - Or is it a non-issue and should we just ignore the tail of the list?
cast fails for classes from windows dll
Hi,
I am not sure, whether this is a current limitation of the
windows dll functionality of D
or I am doing s.th. which will not work.
I have developed in D a windows DLL which creates class instances
by passing the name (using object.factory method).
In another D application I am using this DLL. My issue is, that
the cast fails, although
typeid(bar).name shows the correct name .
module main;
// these classes are in a seperate module
// used for the dll & for this application
export class Foo {}
export class Bar : Foo {}
class Baz : Bar {}
void main()
{
// this method calls the dll and returns Foo
Foo c = dllCreateClass("main.Baz");
// no failure
assert( typeid(c).name == "main.Baz");
// > fails
if (auto myBar = cast(Bar) c){}
}
Kind regards
André
Re: Runtime.unloadLibrary terminates application on Windows
On Monday, 14 December 2015 at 17:50:26 UTC, Andre wrote: Hi, there is an issue with the example from http://wiki.dlang.org/Win32_DLLs_in_D While executing the DYNAMIC_LOAD version, the application will exit on statement: if (!Runtime.unloadLibrary(h)) Neither "error freeing mydll.dll" nor "End..." is written to the console. The application just ends. Kind regards André It seems to be a regression https://issues.dlang.org/show_bug.cgi?id=1550 I will open a ticket for this issue
Re: Runtime.unloadLibrary terminates application on Windows
On Monday, 14 December 2015 at 19:17:00 UTC, Andre wrote: It seems to be a regression https://issues.dlang.org/show_bug.cgi?id=1550 I will open a ticket for this issue https://issues.dlang.org/show_bug.cgi?id=15443
Runtime.unloadLibrary terminates application on Windows
Hi, there is an issue with the example from http://wiki.dlang.org/Win32_DLLs_in_D While executing the DYNAMIC_LOAD version, the application will exit on statement: if (!Runtime.unloadLibrary(h)) Neither "error freeing mydll.dll" nor "End..." is written to the console. The application just ends. Kind regards André
Forward declaration issue
Hi,
I have a strange issue with following coding.
void baz(); // forward declaration
void foo()
{
void bar()
{
baz(); // (1) without f.d. syntax error
}
void baz()
{
bar();
}
baz(); // (2) No linker error if line is removed
}
void main()
{
foo();
}
Without the forward declaration, there is a syntax error at (1)
With the forward declaration there is no syntax error but
a linker error at (2). This linker error disappears if line at (2)
is removed.
It looks like a bug, is it?
Kin regards
Andre
Re: Forward declaration issue
On Friday, 4 December 2015 at 09:51:30 UTC, Artur Skawina wrote:
No, it's how D is designed -- inside functions the order of
declarations matters (and forward declarations don't work).
Your version wrongly declares another `baz` at module scope,
and, as there's no definition, you end up with the linker error.
Two workarounds:
1) Templatize the functions:
void foo()
{
void bar()()
{
baz();
}
void baz()()
{
bar();
}
baz();
}
2) Use a struct:
void foo()
{
struct Hack {
void bar()
{
baz();
}
void baz()
{
bar();
}
}
Hack hack;
hack.baz();
}
artur
Thanks for the clarifications and the example.
Kind regards
André
Re: utils.toBulkString is not accesible from utils
On Wednesday, 2 December 2015 at 12:37:29 UTC, Marc Schütz wrote: I think so, yes. But according to digger, the current behaviour goes back to at least DMD 2.052. Please file a bug report anyway. Bug report filed https://issues.dlang.org/show_bug.cgi?id=15395
utils.toBulkString is not accesible from utils
Hi,
for following coding there is an error during compilation:
module utils;
package string toBulkString(string s)
{
import std.string: format;
return "$%s\r\n%s\r\n".format(s.length, s);
}
unittest
{
string actual = "foobar".toBulkString();
//...
}
source\utils.d(11,39): Error: function utils.toBulkString is
not accessible from module utils
The error disappears if I change the visibility attribute from
package to private.
This seems to be a bug, is it?
Version: DMD v2.069.0-b2
Kind regards
André
Re: experimental.logger: safe function and stdou
On Thursday, 19 November 2015 at 06:27:58 UTC, Andre wrote:
override void writeLogMsg(ref LogEntry payload)
{
with (payload)
{
_stdOutLogger.logf(logLevel, `{
"file":"%s", "line":%s, "funcName":"%s",
"prettyFuncName":"%s",
"moduleName":"%s", "logLevel":%s, "threadId":%s,
"timestamp":"%s", "msg":"%s"}`,
file, line, funcName, prettyFuncName, moduleName, logLevel,
threadId, timestamp);
}
}
I changed the implementation of writeLogMsg and attached the
trusted attribute.
Is this a valid solution?
override void writeLogMsg(ref LogEntry payload) @trusted
{
with (payload)
{
writefln(`{"file":"%s", "line":%s, "funcName":"%s",
"prettyFuncName":"%s",`~
` "moduleName":"%s", "logLevel":%s, "threadId":%s,
"timestamp":"%s", "msg":"%s"}`,
file, line, funcName, prettyFuncName, moduleName, logLevel,
threadId, timestamp, msg);
stdout.flush();
}
}
experimental.logger: safe function and stdou
Hi,
I want to write log entries to stdout in JSON format. Therefore I
created
a customer logger. Unfortunatelly there are 2 errors with
following implementation:
module logger;
import std.experimental.logger;
import std.stdio: stdout;
class MyCustomLogger : Logger
{
private FileLogger _stdOutLogger;
this(LogLevel lv = LogLevel.all) @safe
{
super(lv);
_stdOutLogger = new FileLogger(stdout);
}
override void writeLogMsg(ref LogEntry payload)
{
with (payload)
{
_stdOutLogger.logf(logLevel, `{
"file":"%s", "line":%s, "funcName":"%s",
"prettyFuncName":"%s",
"moduleName":"%s", "logLevel":%s, "threadId":%s,
"timestamp":"%s", "msg":"%s"}`,
file, line, funcName, prettyFuncName, moduleName, logLevel,
threadId, timestamp);
}
}
}
static this()
{
stdThreadLocalLog = new MyCustomLogger();
}
source\logger.d(13,34): Error: safe function 'this' cannot access
__gshared data 'stdout'
source\logger.d(20,22): Error: safe function
'logger.MyCustomLogger.writeLogMsg' cannot call system function
'std.experimental.logger.core.Logger.logf!(20,
"source\\logger.d", "logger.MyCustomLogger.writeLogMsg", "void
logger.MyCustomLogger...
Also the example for creating an user defined logger is wrong:
http://dlang.org/phobos-prerelease/std_experimental_logger.html
There is a compilation error regarding variable newName in super.
newName seems not to be expected here.
Kind regards
André
win32 from master: unicode functions by default?
Hi, by using the win32 library from master, the functions aliases to the ansi windows functions (...A) instead of the unicode functions (...W). Is there a way to control this behavior beside using the explicit function names (A/W)? Kind regards André
Re: win32 from master: unicode functions by default?
On Thursday, 12 November 2015 at 05:08:25 UTC, Mike Parker wrote: On Thursday, 12 November 2015 at 04:58:42 UTC, Andre wrote: Hi, by using the win32 library from master, the functions aliases to the ansi windows functions (...A) instead of the unicode functions (...W). Is there a way to control this behavior beside using the explicit function names (A/W)? Kind regards André version=Unicode on the compiler command line. perfect. Thanks a lot. Kind regards André
Ternary if and ~ does not work quite well
Hi,
I am not sure, whether the output of following coding is correct:
import std.stdio;
void main()
{
writeln("foo "~ true ? "bar" : "baz");
writeln("foo "~ false ? "bar" : "baz");
// assert("foo "~ true ? "bar" : "baz" == "foo bar"); does not
compile
}
Output:
bar
bar
I would expect the output:
foo bar
foo baz
Also I would expect the assertion to compile.
Kind regards
André
Re: Ternary if and ~ does not work quite well
On Monday, 12 October 2015 at 05:25:46 UTC, H. S. Teoh wrote:
On Mon, Oct 12, 2015 at 05:19:38AM +, Andre via
Digitalmars-d-learn wrote:
[...]
[...]
It's best to parenthesize when mixing other operators with ?,
because ? has a pretty low precedence and may "steal" arguments
from surrounding operators that you don't intend. My suspicion
is that what you wrote is being parsed as:
writeln(("foo " ~ true) ? "bar" : "baz");
which is why you're getting unexpected output. Write instead:
writeln("foo " ~ (true ? "bar" : "baz"));
If anything, it also helps readers of your code understand what
it does without needing to consult the precedence table.
T
Thanks a lot for your answers, it really makes sense.
Kind regards
André
Re: Final templated interface method not found
Thanks, it works like a charme. Kind regards André
Final templated interface method not found
Hi,
following coding shoud work, or?
It doesn't compile with v2.068.0.
Kind regards
André
interface IfStatement
{
void execute();
final void execute(T...)(T t)
{
execute();
}
}
class Statement: IfStatement
{
void execute(){}
}
void main()
{
new Statement().execute(1,"Hello World");
}
Definition of SIGRTMIN
Hi,
I cannot use the definition of SIGRTMIN on ubuntu.
For following code I receive errors:
import core.sys.posix.time, core.sys.posix.signal,
core.sys.posix.stdlib, core.sys.posix.unistd;
import std.stdio;
alias SIG = SIGRTMIN;
void main()
{
writeln("Establishing handler for signal %d\n", SIG);
}
source/app.d(77): Error: function
core.sys.posix.signal.__libc_current_sigrtmin is not accessible
from module app
Is there s.th. wrong with the definition?
Kind regards
André
Re: PrimitiveRef ?
Thanks a lot.
I read it in the D Cookbook from Adam D. Ruppe.
In the chapter of memory management there is a topic,
how to build reference counted objects. Here this
construct is explained.
Kind regards
André
On Monday, 23 March 2015 at 20:58:48 UTC, Namespace wrote:
Something like that?
struct PrimitiveRef(T)
{
private T* _value;
@property
ref inout(T) get() inout pure nothrow {
assert(_value);
return *_value;
}
alias get this;
this(T val) {
_value = new T(val);
}
}
alias BoolRef = PrimitiveRef!bool;
void test(BoolRef b)
{
b = true;
}
void main()
{
BoolRef b = false;
test(b);
assert(b == true);
}
PrimitiveRef ?
Hi,
I read that if a structure only contains a reference, it will
behave like a reference type in function calls (needed for
specifying reference behavior in a type tuple).
I need exactly that behavior. I am currently unsure whether it is
possible at all to have such a construct which works at user side
exactly like a boolean (booleans can be assigned and directly
compared with ==) but internally are pointers...
(The coding does not compile)
Kind regards
André
struct PrimitiveRef(T)
{
private T* _value;
alias _value this;
void opAssign(T v)
{
_value = v;
}
}
alias BoolRef = PrimitiveRef!bool;
void test(BoolRef b)
{
b = true;
}
void main()
{
BoolRef b = false;
test(b);
assert(b == true);
}
Re: How to use UFCS and std.algorithm.sort?
Thanks a lot!
Kind regards
André
On Tuesday, 10 March 2015 at 08:40:28 UTC, Jonathan M Davis wrote:
On Tuesday, March 10, 2015 07:24:52 Andre via
Digitalmars-d-learn wrote:
Hi,
with the new beta I get the warning I should use
std.algorithm.sort instead the .sort property. I thought the
std.algorithm.sort method is used in this example?
void main()
{
import std.algorithm: sort, uniq, map;
import std.array: array;
string[] arr = [A,B,B,C];
string[] result = arr
.map!(n = n) // minified
.array
.sort
.uniq
.array;
}
I want to use the sort template with the default less a b
without specifying !(a b)
.sort on an array is going to use the built-in sort property.
You need to
use parens if you want to use the function in std.algorithm
with an array
and UFCS, e.g.
arr.sort();
- Jonathan M Davis
Re: 2.067 Beta: Behavior of enum and ref changed
Thanks a lot! Kind regards André On Tuesday, 10 March 2015 at 09:25:02 UTC, Meta wrote: On Tuesday, 10 March 2015 at 08:37:46 UTC, Jonathan M Davis wrote: It's the base type that isn't implicitly convertible to the enum type. Err, yes. I had that the wrong way around. Anyway, I filed an issue. https://issues.dlang.org/show_bug.cgi?id=14269
2.067 Beta: Behavior of enum and ref changed
Hi,
following coding raises a compiler error with the beta of 2.067.
Is this error intended or not?
It is working if I change first line of main to: ulong bits;
enum Bits: ulong
{
none = 0
}
bool hasBit(ref ulong rBits, ulong rBit)
{
return cast(bool)(rBits rBit);
}
void main()
{
Bits bits;
hasBit(bits, Bits.none);
}
function app.hasBit (ref ulong rBits, ulong rBit) is not callable
using argument types (Bits, Bits)
Kind regards
André
How to use UFCS and std.algorithm.sort?
Hi,
with the new beta I get the warning I should use
std.algorithm.sort instead the .sort property. I thought the
std.algorithm.sort method is used in this example?
void main()
{
import std.algorithm: sort, uniq, map;
import std.array: array;
string[] arr = [A,B,B,C];
string[] result = arr
.map!(n = n) // minified
.array
.sort
.uniq
.array;
}
I want to use the sort template with the default less a b
without specifying !(a b)
Kind regards
André
Re: Implicit fall through not detected (Example from lex.html)
On Tuesday, 3 March 2015 at 07:27:33 UTC, ketmar wrote: implicit fallthru is not a fatal bug (but i believe it should be), it generates only warning. I am also not really happy with the actual behavor (w / wi switch needed) because the documentation is clear about that it is an error: -- from language reference: A ScopeStatementList must either be empty, or be ended with a ContinueStatement, BreakStatement, ReturnStatement, GotoStatement, ThrowStatement or assert(0) expression unless this is the last case. This is to set apart with C's error-prone implicit fall-through behavior. goto case; could be used for explicit fall-through -- Fortunately dub is using the correct switches by default Kind regards André
Implicit fall through not detected (Example from lex.html)
Hi,
I am little bit confused. I am copied the switch example from
lex.html
and expected that case 6 will lead to a syntax error due to the
missing
break statement. But the example compiles without error (C:dmd
app)
I tried 3 different dmd version, also the newest beta.
Kind regards
André
import std.stdio: writeln;
void main()
{
int number;
string message;
switch (number)
{
default:// valid
throw new Exception(unknown number);
case 3: // valid
message ~= three ;
break;
case 5: // valid
message ~= five ;
goto case;
case 6: // ERROR: implicit fall-through
message ~= six ;
case 1: // valid
case 2: // valid
message = one or two;
}
}
curl password issue
Hi, Curl has some issues with passwords containing special characters like the hash key (#). The password will not be accepted although it is correctly set with the method setAuthencication(user, pass1234#); I know this is more a Curl issue than a DLang issue but it is very frustrating and for unexperienced users very hard to find out why the application is working for some users and for some others not... Could the documentation for setAuthentication could be enhanced? Kind regards André
Re: Parameterized enum does not work
Thanks a lot.
Kind regards
André
On Friday, 9 January 2015 at 07:59:51 UTC, Daniel Kozak wrote:
On Friday, 9 January 2015 at 07:52:50 UTC, Daniel Kozak wrote:
On Friday, 9 January 2015 at 07:50:53 UTC, Daniel Kozak wrote:
On Friday, 9 January 2015 at 06:17:53 UTC, Andre wrote:
Hi,
Should following coding work?
string lpad(ubyte length, long n)
{
import std.string: rightJustify;
import std.conv: to;
return rightJustify(to!string(n), length, '0');
}
enum lpad14(long n) = lpad(14, n);
void main()
{
lpad14(123);
}
There is following error from dmd:
source\app.d(12): Error: template app.lpad14 cannot deduce
function from argumen
t types !()(int), candidates are:
source\app.d(8):app.lpad14(long n)
Kind regards
André
What are you trying to do?
OK I probably see it now :):
import std.stdio;
string lpad(ubyte length, long n)
{
import std.string: rightJustify;
import std.conv: to;
return rightJustify(to!string(n), length, '0');
}
enum lpad14(long n) = lpad(14, n);
void main()
{
writeln(lpad14!(123));
}
However this is only for compile time, if you want runtime
version you need something like this:
import std.stdio;
string lpad(ubyte length)(long n)
{
import std.string: rightJustify;
import std.conv: to;
return rightJustify(to!string(n), length, '0');
}
alias lpad14 = lpad!14;
void main()
{
writeln(lpad14(123));
}
Parameterized enum does not work
Hi,
Should following coding work?
string lpad(ubyte length, long n)
{
import std.string: rightJustify;
import std.conv: to;
return rightJustify(to!string(n), length, '0');
}
enum lpad14(long n) = lpad(14, n);
void main()
{
lpad14(123);
}
There is following error from dmd:
source\app.d(12): Error: template app.lpad14 cannot deduce
function from argumen
t types !()(int), candidates are:
source\app.d(8):app.lpad14(long n)
Kind regards
André
Re: BigInt and
Great! Thanks a lot. Kind regards André On Friday, 19 December 2014 at 08:47:50 UTC, bearophile wrote: Andre: Do you have any idea how to translate the coding correctly? Try: i += long(buffer[3]) 24 0; But I also suggest to add parentheses, to make the code less unreadable for humans. Bye, bearophile
BigInt and
Hi,
I try to translate following javascript coding to D:
i = buffer[2] 16;
i |= buffer[1] 8;
i |= buffer[0];
i += buffer[3] 24 0;
Buffer is:
[255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 111]
Expected result for i is: 4294967295
But in D the last statement returns -1, the previous 3 statements
returns the same values like in JavaScript.
I tried long and also like in the example BigInt, both do not
work correctly. In the documentation it is also mentioned that
is not supported for BigInt?
void main()
{
import std.stdio;
import std.bigInt;
auto buffer = [255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 111];
BigInt i;
i = buffer[2] 16;
i |= buffer[1] 8;
i |= buffer[0];
i += buffer[3] 24 0;
writeln(i: , i);
}
Do you have any idea how to translate the coding correctly?
Kind regards
André
Re: Template bug with second mixin?
I think I mimized the coding too much.
What I actually want to achieve is to generate read methods
in the structure for different data types (Ubyte, short, int):
I thought the eponymous trick would insert the content of the
enum instead the name itself?
string getReadMethods(string methodName, string dataType)
{
return dataType~` `~methodName~`(size_t idx) {
return v_arr[idx].get!`~dataType~`; }`;
}
template insertReadMethods(string MethodName, DataType)
{
enum insertReadMethods = getReadMethods(MethodName,
DataType.stringof);
}
struct Data
{
mixin insertReadMethods!(readTinyInt, ubyte);
mixin insertReadMethods!(readShortInt, short);
}
void main(){}
Kind regards
André
On Friday, 5 December 2014 at 07:28:26 UTC, ketmar via
Digitalmars-d-learn wrote:
On Fri, 05 Dec 2014 07:06:34 +
Andre via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
Hi,
following coding fails to compile with 2.066.0 and
2.067.0-b1.
This is a bug, or?
source\app.d(9): Error: mixin
app.Data.insertReadMethods!(readTinyInt, ubyte)
is not defined
template insertReadMethods(string MethodName, DataType)
{
enum insertReadMethods = ;
}
struct Data
{
mixin insertReadMethods!(readTinyInt, ubyte);
mixin insertReadMethods!(readTinyInt, ubyte);
}
void main(){}
i.e. mixin template inserts it's names into the same scope,
and
compiler searching symbols from innermost scope up to module
scope.
here first mixin inserts 'enum' member, and searching for
second mixin
hits that enum member. to avoid things going out of control
compiler is
not trying to guess what you want but stops with error, giving
you a
chance to fix the code.
Re: Template bug with second mixin?
thanks a lot. That makes sense.
Kind regards
André
On Friday, 5 December 2014 at 09:29:21 UTC, ketmar via
Digitalmars-d-learn wrote:
On Fri, 05 Dec 2014 09:19:27 +
Andre via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
I think I mimized the coding too much.
What I actually want to achieve is to generate read methods
in the structure for different data types (Ubyte, short, int):
I thought the eponymous trick would insert the content of the
enum instead the name itself?
string getReadMethods(string methodName, string dataType)
{
return dataType~` `~methodName~`(size_t idx) {
return v_arr[idx].get!`~dataType~`; }`;
}
template insertReadMethods(string MethodName, DataType)
{
enum insertReadMethods = getReadMethods(MethodName,
DataType.stringof);
}
struct Data
{
mixin insertReadMethods!(readTinyInt, ubyte);
mixin insertReadMethods!(readShortInt, short);
}
void main(){}
you musunderstood how mixin templates works. mixin templates
are more
like macroses than templates per se, so you don't need to assign
anything to enum to get the result. i.e.
string getReadMethods(string methodName, string dataType)
{
return dataType~` `~methodName~`(size_t idx) {
return v_arr[idx].get!`~dataType~`; }`;
}
template insertReadMethods(string MethodName, DataType)
{
/*enum insertReadMethods =*/ // no need to do this
// do that instead ;-)
mixin(getReadMethods(MethodName, DataType.stringof));
}
struct Data
{
mixin insertReadMethods!(readTinyInt, ubyte);
mixin insertReadMethods!(readShortInt, short);
}
think about mixin templates as macro definitions which will be
just
inserted where you instantiated them.
Template bug with second mixin?
Hi,
following coding fails to compile with 2.066.0 and
2.067.0-b1.
This is a bug, or?
source\app.d(9): Error: mixin
app.Data.insertReadMethods!(readTinyInt, ubyte)
is not defined
template insertReadMethods(string MethodName, DataType)
{
enum insertReadMethods = ;
}
struct Data
{
mixin insertReadMethods!(readTinyInt, ubyte);
mixin insertReadMethods!(readTinyInt, ubyte);
}
void main(){}
Kind regards
André
jsnode crypto createHmac createHash
Hi,
I translate some functionality written in jsnode,
which contains a crypto library.
Although there is some sha256 support in
phobos I think, they do not provide all functionality
I need to translate following two functions.
(Input and output is ubyte[])
Is there a library which supports the methods
similiar (createHmac, update)... ?
function hmac(key, msg) {
var hash = crypto.createHmac('sha256', key);
hash.update(msg);
return new Buffer(hash.digest(), 'binary');
}
function sha256(msg) {
var hash = crypto.createHash('sha256');
hash.update(msg);
return new Buffer(hash.digest(), 'binary');
}
Kind regards
André
Re: jsnode crypto createHmac createHash
fantastic, thanks a lot.
Kind regards
André
On Friday, 28 November 2014 at 13:09:34 UTC, Daniel Kozák via
Digitalmars-d-learn wrote:
V Fri, 28 Nov 2014 12:46:25 +
andre via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com
napsáno:
Hi,
I translate some functionality written in jsnode,
which contains a crypto library.
Although there is some sha256 support in
phobos I think, they do not provide all functionality
I need to translate following two functions.
(Input and output is ubyte[])
Is there a library which supports the methods
similiar (createHmac, update)... ?
function hmac(key, msg) {
var hash = crypto.createHmac('sha256', key);
hash.update(msg);
return new Buffer(hash.digest(), 'binary');
}
function sha256(msg) {
var hash = crypto.createHash('sha256');
hash.update(msg);
return new Buffer(hash.digest(), 'binary');
}
Kind regards
André
I am using
https://github.com/pszturmaj/phobos/tree/master/std/crypto
attribute length missing in std.array: Appender
Hi, I implement a network protocol and use an Appender!(ubyte[])(). I have following issue. The first three bytes I have to fill, the following bytes are reserved and must be 0. In this example the overall header length must be 8. import std.array: appender; const HEADER_LENGTH = 8; auto app = appender!(ubyte[])(); app.put(cast(ubyte)40); app.put(cast(ubyte)5); app.put(cast(ubyte)234); // ... add 5 times 0 // variable length body will follow In case of dynamic array I can simple set the length to 8. Appender doesn't have a length attribute. Is there some other nice D functionaliy I can use? Maybe some functionality in std.array is missing: app.fill(0, HEADER_LENGTH)? Currently I do a work around with a for loop. Kind regards André
Re: attribute length missing in std.array: Appender
Thanks a lot for the help. Kind regards André On Thursday, 27 November 2014 at 17:29:50 UTC, Marc Schütz wrote: On Thursday, 27 November 2014 at 16:08:13 UTC, Andre wrote: Hi, I implement a network protocol and use an Appender!(ubyte[])(). I have following issue. The first three bytes I have to fill, the following bytes are reserved and must be 0. In this example the overall header length must be 8. import std.array: appender; const HEADER_LENGTH = 8; auto app = appender!(ubyte[])(); app.put(cast(ubyte)40); app.put(cast(ubyte)5); app.put(cast(ubyte)234); // ... add 5 times 0 // variable length body will follow In case of dynamic array I can simple set the length to 8. Appender doesn't have a length attribute. Is there some other nice D functionaliy I can use? Maybe some functionality in std.array is missing: app.fill(0, HEADER_LENGTH)? Currently I do a work around with a for loop. Kind regards André You can initialize the appender with an existing array, or put an entire array into it at once: import std.array: appender; ubyte[] temp; temp.reserve(8); // reserve first, so that only one allocation happens temp[0 .. 3] = [40, 5, 234]; temp.length = 8; auto app = appender!(ubyte[])(temp); // or: app.put(temp); The array will not be copied when the appender is constructed.
Re: @property method needs ()
Thanks a lot for the info. Kind regards André On Monday, 24 November 2014 at 09:26:16 UTC, Marc Schütz wrote: On Monday, 24 November 2014 at 08:35:08 UTC, ketmar via Digitalmars-d-learn wrote: a known thing. not sure if this is a known *bug* (seems that almost nobody cares). compiler is obviously wrong here (and i believe that it's wrong to accept `()` for properties at all), but i don't know if this will ever be fixed. There's hope that this will get fixed in the near future: https://github.com/D-Programming-Language/dmd/pull/2305
@property method needs ()
Hi,
in following example the @property method needs the ()
otherwise compiler error for row 24 is thrown.
I cannot judge, whether the compiler behaves correct or not.
Kind regards
André
---
alias fnError = void delegate(string s);
interface IfSession
{
@property fnError addError();
}
class Session: IfSession
{
private fnError _addError;
@property fnError addError()
{
return _addError;
}
}
void main()
{
auto session = new Session();
session._addError = delegate(s){};
session.addError()(test); // Works
session.addError(test); // Does not work
}
InvalidMemoryOperationError@(0)
Hi,
the following coding is an extract from the DGUI library.
On my system (Win 8) I receive InvalidMemoryOperationError@.
I got the information that this Error doesn't not occur on
a WinXP system.
I think there is definetely a bug in the following coding.
The Grid class has a Collection of Rows. Each Row has a Collection
of Cols.
The class Row has a destructor which has an empty foreach over
the Collection of Cols. If I comment this empty foreach no
error is thrown. I assume the class Collection accesses a Col
object which is already destructed?
Does DMD behave correctly (InvalidMemoryOperationError) and
can where in the Collection class exactly the invalid object is
accessed? I tried to find the invalid coding line, but without
success.
class Collection(T)
{
private T[] _t;
int add(T t)
{
this._t ~= t;
return this._t.length - 1;
}
void clear()
{
this._t.length = 0;
}
T[] get()
{
return this._t;
}
@property int length()
{
return this._t.length;
}
T opIndex(int i) nothrow
{
if(i = 0 i this._t.length)
{
return this._t[i];
}
assert(false, Index out of range);
}
int opApply(int delegate(ref T) dg)
{
int res = 0;
if(this._t.length)
{
for(int i = 0; i this._t.length; i++)
{
res = dg(this._t[i]);
if(res)
{
break;
}
}
}
return res;
}
}
class Col {}
class Row
{
private Collection!(Col) _columns;
this()
{
this._columns = new Collection!(Col)();
}
~this()
{
foreach(cp; this._columns)
{
}
}
Col addColumn()
{
Col cp = new Col();
this._columns.add(cp);
return cp;
}
}
class Grid
{
private Collection!(Row) _rows;
this()
{
this._rows = new Collection!(Row)();
}
@property public Row[] rows()
{
return this._rows.get();
}
Row addRow()
{
Row rp = new Row();
this._rows.add(rp);
return rp;
}
void clear()
{
_rows.clear();
}
}
void main()
{
auto grid = new Grid();
for(int i=0; i 10; i++)
{
grid.clear();
with(grid.addRow())
{
addColumn();
addColumn();
addColumn();
}
}
}
Get full class name at compile time - Not yet implemented
Hi,
I currently have some issues to get the full class name at
compile time by the variable which might point to null.
With .stringof I get the class name without the module. It seems
typeid(typeof())
is the solution, but DMD throws the error:
source\app.d(10): Error: typeid(app.A).name is not yet
implemented at compile t
ime
Do I have any other possibilities?
Kind regards
André
module app;
class A {};
void main()
{
A a;
pragma(msg, typeof(a).stringof); // A
pragma(msg, typeid(typeof(a)).name); // Should print app.A
}
Re: Get full class name at compile time - Not yet implemented
perfekt, thanks a lot. Kind regards André On Thursday, 13 November 2014 at 05:37:26 UTC, Rikki Cattermole wrote: On 13/11/2014 6:22 p.m., Andre wrote: http://dlang.org/phobos/std_traits.html#fullyQualifiedName
Re: Intended behavior or bug (private vs public static)
Thanks a lot. I will create a bug report. Kind regards André On Friday, 7 November 2014 at 06:09:02 UTC, Jonathan M Davis via Digitalmars-d-learn wrote: That looks like a bug. All you have to do is change the order of the two function declarations or rename the non-static one to something else, and it compiles. So, somehow, the fact that the non-static one has the same name as the static one and the fact that it comes first screws up accessing the static one. And explicitly marking the static one as public doesn't help. So, you should report is a compiler bug: https://issues.dlang.org - Jonathan M Davis
Re: Issue with WIKI example Win32_DLLs_in_D
I think there is a bigger issue with the mentioned example. The command cannot work: dmd test mydll.lib -g test.d has an import statement to mydll. mydll has to be included in the command. But as mydll not only contains the exported dll functions but also DllMain, it cannot be compiled together with test which contains the main entry point. Maybe the example can be corrected. Kind regards André On Tuesday, 21 October 2014 at 21:57:06 UTC, Laeeth Isharc wrote: Funnily enough I was just playing with this last night trying to get Excel to talk to dlang DLL. I borrowed a C example elsewhere on web and used a different .def file. Something like this: LIBRARY dprop DESCRIPTION 'My DLL written in D' EXETYPE NT CODEPRELOAD DISCARDABLE DATAWRITE EXPORTS useArray = useArray usemyTest = usemyTest Where the two functions exported from D to excel were as above. Try that and let me know. If that doesn't work I will send you a link to from repository.
Issue with WIKI example Win32_DLLs_in_D
Hi, by copy and paste the example from http://wiki.dlang.org/Win32_DLLs_in_D exactly as described, the following errors is thrown: J:\Projects\Tests\Exampledmd test mydll.lib -g OPTLINK (R) for Win32 Release 8.00.15 test.obj(test) Error 42: Symbol Undefined _D5mydll12__ModuleInfoZ I created a batch program which executes the commands as described on the wiki page: dmd -c mydll -g dmd mydll.obj mydll.def -g -L/map C:\D\dmd2\windows\bin\implib /noi /system mydll.lib mydll.dll dmd test mydll.lib -g Could you check whats wrong with the example and maybe update the WIKI page? Thanks. Kind regards André
__traits(getMember) works only the second time
Hi,
by executing the example source code,
following output is returned:
Reference: Child
false
true
At first childStr is not found, then it is found?
Is this a bug?
Kind regards
André
-
module app;
import test;
class Child : Parent
{
mixin ComponentTemplate;
@property string childStr(){return ;}
}
void main()
{
auto child = new Child();
child.getParameters();
}
-
module test;
template Params(this MyType)
{
string[] Params()
{
pragma(msg, Reference: ~ MyType.stringof);
pragma(msg, is(typeof(__traits(getMember, MyType,
childStr;
pragma(msg, is(typeof(__traits(getMember, MyType,
childStr;
return [];
}
}
mixin template ComponentTemplate()
{
private enum parameters = Params!(typeof(this));
string[] getParameters()
{
return parameters;
}
}
class Parent
{
@property string parentStr(){return ;}
}
Re: __traits(getMember) works only the second time
I use the syntax is(typeof(__traits(getMember, MyType, childStr))) to check whether a member is public visible or not. (The example above is only a reduced example) By the way hasMember works correctly. I will file an issue. Kind regards André On Friday, 10 October 2014 at 07:25:28 UTC, Rikki Cattermole wrote: On 10/10/2014 8:08 p.m., andre wrote: Wrong trait for the job. Use hasMember instead. Although interesting use case. Could be a bug somewhere in there.
(this MyType) automatic deduction?
Hi,
could you check whether it is correct, that second line in main
failes with a compiler error?
I think the compiler should be able to deduce the type without
explicitly passing it to the method call.
Kind regards
André
template ClassTemplate()
{
static auto deserialize(this MyType)()
{
return new MyType();
}
}
class A
{
mixin ClassTemplate;
}
void main()
{
A a = A.deserialize!A(); // Working
A b = A.deserialize(); // Not working
}
source\app.d(17): Error: template
app.A.ClassTemplate!().deserialize cannot dedu
ce function from argument types !()(), candidates are:
source\app.d(3):app.A.ClassTemplate!().deserialize(this
MyType)()
(this MyType) and interface: Symbol undefined
Hi,
please consider following example. I want to acces class B by
interface I.
Method work should print the actual class (B).
The linker say:
Error 42: Symbol Undefined _D3app1I17__T4workTC3app1IZ4workMFZv
Is this is missing feature or even a bug?
Is there any other way to get the actual class (B) printed
by the inherited method from A?
Kind regards
André
interface I
{
void work(this MyType)();
}
class A : I
{
void work(this MyType)()
{
import std.stdio;
writeln(MyType.stringof);
}
}
class B : A {}
void main()
{
I i = new B();
i.work(); // Expected output: B
}
Re: (this MyType) automatic deduction?
Thanks a lot for the helpful explanation.
Kind regards
André
On Wednesday, 8 October 2014 at 21:10:02 UTC, anonymous wrote:
On Wednesday, 8 October 2014 at 10:36:33 UTC, andre wrote:
Hi,
could you check whether it is correct, that second line in main
failes with a compiler error?
I think the compiler should be able to deduce the type without
explicitly passing it to the method call.
Kind regards
André
template ClassTemplate()
{
static auto deserialize(this MyType)()
{
return new MyType();
}
}
class A
{
mixin ClassTemplate;
}
void main()
{
A a = A.deserialize!A(); // Working
A b = A.deserialize(); // Not working
}
source\app.d(17): Error: template
app.A.ClassTemplate!().deserialize cannot dedu
ce function from argument types !()(), candidates are:
source\app.d(3):
app.A.ClassTemplate!().deserialize(this MyType)()
As far as I can tell, 'this' parameters don't work with static
methods. You can use typeof(this) instead:
template ClassTemplate()
{
static auto deserialize()
{
return new typeof(this)();
}
}
class A
{
mixin ClassTemplate;
}
void main()
{
A b = A.deserialize();
}
Be aware of the difference between template 'this' parameters
and
typeof(this). A 'this' parameter is set to the (static) type of
the object, while typeof(this) is always the type of the
surrounding class.
class A
{
import std.stdio;
void printTypeofThis() {writeln(typeof(this).stringof);}
void printThisParameter(this T)() {writeln(T.stringof);}
}
class B : A {}
void main()
{
auto b = new B;
b.printTypeofThis(); /* A, because the method is in A */
b.printThisParameter(); /* B, because b is a B
(statically) */
A a = b;
a.printThisParameter(); /* A, because a is an A
(statically)
*/
}
Re: Curl - Set cookie value
I found out the real issue. Using addRequestHeader also works for cookies, but there is an issue with HTTP attribute responseHeaders. As this attribute is an associative array (string[string]) it contains only 1 value for 1 key. In case there are several HTTP keys with the same name, it only contains the last value. Example: set-cookie = A; path=/; HttpOnly set-cookie = B; path=/; HttpOnly content-type = text/plain reponseHeaders[set-cookie] contains only the seccond value. To work around this issue you have to react on onReceiveHeader and catch the values there. Kind regards André On Monday, 6 October 2014 at 06:43:58 UTC, andre wrote: Hi, from a GET request I receive an value set-cookie in the reponse header. The value from set-cookie I have to provide as cookie value for the next post request. CURL provides a command line command --cookie USER_TOKEN=Yes In the std.net.curl HTTP API, there is no possibility to set a cookie value. Could you check? Kind regards André
Re: isCallable is not an expression
Thanks a lot. Kind regards André
isCallable is not an expression
Hi,
following code throws an error when I uncomment method
getPropertyDuplicate.
getPropertyDuplicate is just a copy of getProperty except the
method name.
Why these errors are thrown?
C:\D\dmd2\windows\bin\..\..\src\phobos\std\traits.d(1257): Error:
isCallable!(ge
tPropertyDuplicate) is not an expression
source\app.d(25):while looking for match for
functionAttributes!(getProp
ertyDuplicate)
C:\D\dmd2\windows\bin\..\..\src\phobos\std\traits.d(1257): Error:
template insta
nce std.traits.isCallable!(getPropertyDuplicate) error
instantiating
source\app.d(11):instantiated from here:
functionAttributes!(getProperty
Duplicate)
source\app.d(11):while looking for match for
functionAttributes!(getProp
ertyDuplicate)
Kind regards
André
template MyTemplate()
{
import std.traits : isSomeFunction, functionAttributes,
FunctionAttribute, ReturnType;
string[] getPropertyNames()
{
string[] result;
foreach(m;__traits(allMembers, typeof(this)))
{
static if (isSomeFunction!(__traits(getMember, typeof(this),
m))
functionAttributes!(__traits(getMember, typeof(this), m))
FunctionAttribute.property)
{
result ~= m;
}
}
return result;
}
/*string[] getPropertyDuplicate()
{
string[] result;
foreach(m;__traits(allMembers, typeof(this)))
{
static if (isSomeFunction!(__traits(getMember, typeof(this),
m))
functionAttributes!(__traits(getMember, typeof(this), m))
FunctionAttribute.property)
{
result ~= m;
}
}
return result;
}*/
}
class A {
mixin MyTemplate;
}
void main() {
auto a = new A();
}
Re: with (auto p = new ...)
Enhancement 13526 filed: https://issues.dlang.org/show_bug.cgi?id=13526
with (auto p = new ...)
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
Re: with (auto p = new ...)
Yes, that is also working. As far as I remember (only my tablet
currently available) also this works:
Panel p;
with(p = new Panel ()) {}
Therefore it seems strange,the same does not work with auto.
Kind regards
André
On Tuesday, 23 September 2014 at 19:49:22 UTC, Graham Fawcett
wrote:
Sorry, I sent that last message before I intended to.
How about:
auto b = new Button(); with (b) {
...
}
'b' is explicitly outside of the scope of the 'with' block,
which may not be what you intended. But you could use more
braces to add an extra level of scope if that's an issue:
...
text = blah;
{
auto b = new Button(); with (b) {
...
}
}
// b is no longer in scope
Graham
On Tuesday, 23 September 2014 at 15:19:59 UTC, Andre wrote:
Hi,
I just wonder why with (auto p = new ...) is not working.
It would be some syntax sugar in this scenario:
with (auto p = new Panel())
{
parent = this;
text = bla;
with (auto b = new Button())
{
parent = p; // Here p is needed
text = bla2;
}
}
source\app.d(8): Error: expression expected, not 'auto'
source\app.d(8): Error: found 'p' when expecting ')'
source\app.d(8): Error: found '=' instead of statement
...
Kind regards
André
alias this cast
Hi,
I am 80% sure, the failing assertion is correct but please have a
look.
Second assertion fails.
Kind regards
André
class A{}
class B{}
class C : B
{
A a;
alias a this;
this()
{
a = new A();
}
}
void main()
{
B b = new C();
// OK
assert(cast(C)b);
// fails
assert(cast(A)b);
}
Re: alias this cast
I am not sure. b is C but everything not in super class B is
hidden.
Using cast I can cast b to a full C.
The cast cast(C)b has the same information about b like the
cast cast(A)b: The memory area of b knows compatitibility to C
and also the alias.
For me, using alias this, the object b has 3 represenations: A, B
and C. It is a matter of steps.
Kind regards
André
On Thursday, 11 September 2014 at 11:53:30 UTC, Daniel Kozak via
Digitalmars-d-learn wrote:
V Thu, 11 Sep 2014 11:40:05 +
andre via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com
napsáno:
Hi,
I am 80% sure, the failing assertion is correct but please
have a look.
No it is not
assert(cast(A)cast(C)b); // this is OK
b is B so it does not know about having alias to A;
Second assertion fails.
Kind regards
André
class A{}
class B{}
class C : B
{
A a;
alias a this;
this()
{
a = new A();
}
}
void main()
{
B b = new C();
// OK
assert(cast(C)b);
// fails
assert(cast(A)b);
}
Re: DUB: link to local library
Dub command line supports something like Dub add-local. Then you
can use the package directly.
Kind regards
Andre
On Wednesday, 10 September 2014 at 15:40:11 UTC, Edwin van
Leeuwen wrote:
On Wednesday, 10 September 2014 at 13:40:16 UTC, rcor wrote:
dub.json contains what I think should do the same as above:
{
name: test,
importPaths: [ext/dallegro5],
lflags: [-Lext/dallegro5]
}
Does adding:
libs: [dallegro5]
make a difference?
Cheers, Edwin
Re: dgui - Button continually repainting
Hi,
Just checked, on WM_PAINT all event listeners (event paint) are
called.
Overwriting onPaint seems to work better (issue 18 in dgui
bitbucket site). Please file this issue also on the dgui bibucket
home page.
Kind regards
Andre
On Tuesday, 9 September 2014 at 10:50:11 UTC, Mike James wrote:
Hi.
I've created a graphic button as per this example on the dgui
website:
import dgui.all;
class MyForm: Form
{
this()
{
text = An Exception was thrown...;
size = Size(130, 100);
// Or use `Bitmap.fromFile`:
auto img = new Bitmap(90, 15, SystemColors.yellow);
auto pen = SystemPens.blackPen;
with(new Button())
{
bounds = Rect(10, 10, 100, 25);
parent = this;
paint.attach((s, e)
{
e.canvas.drawImage(img, 5, 5);
e.canvas.drawLine(pen, 5, 10, 95, 10);
e.canvas.drawLine(pen, 10, 5, 10, 20);
});
}
}
}
int main()
{
return Application.run(new MyForm());
}
and added a writeln(paint) in the paint.attach to show when
the button is repainting. When the form with the button is
visible the button is being continually repainted. Is this a
'feature' of dgui or is there a flag to set to only re-paint
when the button is invalidated?
Regards, -=mike=-.
dgui - self defined components with double buffering
Hi,
I habe several self defined components in my Windows.
During resizing of the Windows, the Windows controls
gets ugly and then disappear. I want to implement
double buffering but found no obvious way to create
a memory canvas and after having done the drawing copying
It to the canvas of the control.
Current implementation looks this:
class TitleBox : PictureBox
{
private Color startColor_ = SystemColors.darkGray;
private Color endColor_ = SystemColors.white;
protected override void onPaint(PaintEventArgs e)
{
Canvas c = e.canvas;
c.fillRectGradient(Rect(nullPoint, this.size),
startColor_, endColor_, GradientFillRectMode.vertical);
c.drawText(text, Rect(Point(2,2), this.size));
super.onPaint(e);
}
}
Does anyone have an idea?
Kind regards
André
User defined forward range - foreach initializes f.r.
Hi,
I have a template class List which should provide generic list
functionality. In my use case, using a class instead a struct
is more comfortable.
Following unittest fails, although the forward range
implements the save method.
unittest
{
auto intList = new List!int(1,2,3);
assert(intList.length == 3);
foreach(item; intList) {}
assert(intList.length == 3);
}
class List(T)
{
private T[] items;
this(T[] items...)
{
this.items = items;
}
bool empty() const
{
return items.length == 0;
}
@property int length() const
{
return items.length;
}
void popFront()
{
items = items[1..$];
}
@property List!T save() const
{
return new List!T( cast(T[]) items);
}
T front() const
{
return opIndex(0);
}
T opIndex(size_t index) const
{
return cast(T) items[index];
}
}
I already tried different thinks, like using dup or importing std.array.
But nothing helps, the unittest fails.
Why it fails?
Kind regards
André
Re: User defined forward range - foreach initializes f.r.
Am 13.06.2014 20:22, schrieb H. S. Teoh via Digitalmars-d-learn:
[...]
Generally, it's a bad idea to conflate a container with a range over its
contents. In this sense, built-in arrays are a very bad example, because
they show precisely this sort of conflation. But they get away with it
because of their hybrid value/reference semantics. Most containers,
however, don't have this sort of complex semantics, so they don't mix
very well with ranges directly.
It's much better to separate the container from a range over its
contents. So I wouldn't put the range API methods in the List class, but
implement an opSlice method that returns a struct that performs the list
iteration, that implements the range API. This allows you to write:
auto myList = new List(...);
foreach (item; myList[]) { // N.B., myList[] calls myList.opSlice()
...
}
Since the range struct returned by opSlice is separate from the
container itself, you don't have any risk of iteration also consuming
the container.
T
Thank you, this information is really helpful.
Kind regards
André
Issue with contracts and assertions
Hi,
for the attached code I noticed some strange behaviors.
I compile the programm with: dmd main -unittest
The expected assertion of the method c pre condition is
not raised.
It is only raised if class A not implements interface I.
On the otherside the commented assertion in the invariant is working
fine.
Is this a bug?
Kind regards
André
interface I {
void c();
}
class A : I {
invariant() {
//assert(false, Assert INVARIANT); // Working
}
void c()
in {
assert(false, Assert IN);
}
body {
}
}
unittest {
A a = new A();
a.c();
}
void main(){}
Re: Issue with contracts and assertions
Am 23.05.2014 16:34, schrieb Rene Zwanenburg:
On Friday, 23 May 2014 at 13:45:07 UTC, Andre wrote:
Hi,
for the attached code I noticed some strange behaviors.
I compile the programm with: dmd main -unittest
The expected assertion of the method c pre condition is
not raised.
It is only raised if class A not implements interface I.
On the otherside the commented assertion in the invariant is working
fine.
Is this a bug?
Kind regards
André
interface I {
void c();
}
class A : I {
invariant() {
//assert(false, Assert INVARIANT); // Working
}
void c()
in {
assert(false, Assert IN);
}
body {
}
}
unittest {
A a = new A();
a.c();
}
void main(){}
I'm not sure. An implementation shouldn't be allowed to have stricter
pre-conditions than it's base class or interface. On the other hand it
should be able to relax them.
In case there is a reason that the assertion is not run,
if feels very dangerous for me that all assertions can be
disabled by mistake just by adding an interface to a class.
At least a compiler messsage should be thrown to warn about
useless assertions
Kind regards
André
Re: Issue with contracts and assertions
Am 23.05.2014 16:44, schrieb Rene Zwanenburg: On Friday, 23 May 2014 at 14:38:27 UTC, Andre wrote: Am 23.05.2014 16:34, schrieb Rene Zwanenburg: In case there is a reason that the assertion is not run, if feels very dangerous for me that all assertions can be disabled by mistake just by adding an interface to a class. At least a compiler messsage should be thrown to warn about useless assertions Kind regards André I completely agree. A quick search on the issue tracker shows there are some serious bugs involving in contracts and interfaces[0]. It's probably best to keep away from them until the situation improves. [0]: https://issues.dlang.org/buglist.cgi?quicksearch=in%20contract%20interface ): I found my issue: https://issues.dlang.org/show_bug.cgi?id=12321 I just think about whether it is possible to build a contracts library similiar to C4J (Contracts 4 Java). I like the classed based approach. Kind regards André
Array of interface only with cast()?
Hi,
I just stumbled about this issue with array of interface. I want
to pass several objects (C and D) which shares the same interface A.
It seems somehow cumbersome that it only works if there is a cast on
the first element of the array.
interface A{}
class B: A{}
class C: B{};
class D: B{};
void main()
{
//A[] arr = [new C(), new D()]; // Does not work
A[] arr = [cast(A) new C(), new D()]; // Does work
}
Is the cast really needed?
Kind regards
André
Re: Array of interface only with cast()?
Am 22.04.2014 17:23, schrieb Andrej Mitrovic: On Tuesday, 22 April 2014 at 15:19:55 UTC, Andre wrote: Is the cast really needed? It's a known issue and a filed bug report. I don't have the Issue number at hand though, someone else will likely provide it. Nice to hear that it is not by design but will be fixed. Thanks a lot. Kind regards André
