Re: extern(C++) linker errors
On Wed, 22 Apr 2015 02:14:40 -0400, Dan Olson zans.is.for.c...@yahoo.com
wrote:
bitwise bitwise@gmail.com writes:
I am trying to interface to C++, and getting linker errors. Below are
my 3 source files and 2 build scripts with their associated
errors. Can anyone see what I'm doing wrong?
Hi, I think both examples need libstdc++ added when you link
(-L-lstdc++). That should resolve the missing C++ operators.
For script1.sh with ldc2 I see an extra underscore in C++ mangled names.
You must be on OS X. ldc was just fixed in merge-2.067 branch to remove
an extra underscore on OS X. If you want to experiment, you can build
https://github.com/ldc-developers/ldc/tree/merge-2.067 and check it out.
There are still a few tests to reolve, but it works pretty well for me.
--
Dan
Awesome, Thanks!
I am now getting the expected error from clang/LDC, and the GCC/DMD build
is working. I'll probably switch to LDC at some point, but I just need to
get up and running right now.
My updated(objective-C++) and working code:
/ test.mm
#include stdio.h
#import Foundation/Foundation.h
@interface XYZPerson : NSObject
- (void)sayHello;
@end
@implementation XYZPerson
- (void)sayHello {
printf(Hello, World!\n);
}
@end
class Test {
public:
virtual void Foo(){
XYZPerson *person = [[XYZPerson alloc] init];
[person sayHello];
[person release];
}
};
Test* CreateTest() {
return new Test;
}
void DestroyTest(Test *test) {
delete test;
}
/ Test.d
same
/ main.d
same
/ script2.sh
g++ test.mm -olibTest.o -c -stdlib=libc++
ar rcs libTest.a libTest.o
dmd main.d Test.d libTest.a -ofTest -L/usr/lib/libc++.dylib -L-framework
-LFoundation
./Test
Re: Download DDMD?
On Wednesday, 22 April 2015 at 09:26:37 UTC, jkpl wrote: On Wednesday, 22 April 2015 at 07:57:40 UTC, Jeremiah DeHaan wrote: Just curious, but I was wondering if there was a 2.067 DDMD available for download somewhere for Windows. If not, then are there any special build instructions I need to build it? I kind of just want to try a couple of things, so I would rather I not have to build it if I can avoid it. the 2.067 ddmd is available as a static library. For the moment it only includes the lexer and the parser: https://github.com/yebblies/ddmd it does not require anything specific to build: pass the sources, set the -lib switch, maybe set the warnings/depreciations to off because there are some small syntax issues (C-stle array or switch case fallthrough). I've put it metad btw https://github.com/BBasile/metad/blob/master/projects/ddmd.coedit
Re: Reading whitespace separated strings from stdin?
On Tuesday, 21 April 2015 at 03:44:16 UTC, weaselcat wrote: snip Wow, that's a damn good solution... I didn't know that readln() could take an argument that it stops at once it finds. Now the thing is, this program is supposed to be a reverse Polish notation calculator. A human using this program would probably be confused as to why nothing happens when they hit enter after a line -- it only really works in the context of copying and pasting the whole input in. Still a really neat solution to know anyhow. Thanks!
Re: Download DDMD?
On Wednesday, 22 April 2015 at 15:06:17 UTC, Jeremiah DeHaan wrote: On Wednesday, 22 April 2015 at 09:26:37 UTC, jkpl wrote: On Wednesday, 22 April 2015 at 07:57:40 UTC, Jeremiah DeHaan wrote: Just curious, but I was wondering if there was a 2.067 DDMD available for download somewhere for Windows. If not, then are there any special build instructions I need to build it? I kind of just want to try a couple of things, so I would rather I not have to build it if I can avoid it. the 2.067 ddmd is available as a static library. For the moment it only includes the lexer and the parser: https://github.com/yebblies/ddmd it does not require anything specific to build: pass the sources, set the -lib switch, maybe set the warnings/depreciations to off because there are some small syntax issues (C-stle array or switch case fallthrough). Yes, I was aware of this, but I actually want it as a compiler. oops, i was not sure of you being a noob even if i saw your avatar many times here. Sorry. Just ask to someone of the core...
Re: Download DDMD?
On Wednesday, 22 April 2015 at 09:26:37 UTC, jkpl wrote: On Wednesday, 22 April 2015 at 07:57:40 UTC, Jeremiah DeHaan wrote: Just curious, but I was wondering if there was a 2.067 DDMD available for download somewhere for Windows. If not, then are there any special build instructions I need to build it? I kind of just want to try a couple of things, so I would rather I not have to build it if I can avoid it. the 2.067 ddmd is available as a static library. For the moment it only includes the lexer and the parser: https://github.com/yebblies/ddmd it does not require anything specific to build: pass the sources, set the -lib switch, maybe set the warnings/depreciations to off because there are some small syntax issues (C-stle array or switch case fallthrough). Yes, I was aware of this, but I actually want it as a compiler.
Re: Structural exhaustive matching
On Wednesday, 22 April 2015 at 04:54:39 UTC, Martin Nowak wrote:
On Tuesday, 21 April 2015 at 15:36:28 UTC, Jadbox wrote:
What's the best equivalent to Rust's structural enum/pattern
(match)ing? Is it also possible to enforce exhaustive matches?
Basically, I'm curious on what the best way to do ADTs in D.
If it needs to be really fast, use final switch on the tag of a
discriminated union.
enum Tag { A, B, C }
struct Val
{
Tag tag;
union
{
A a;
B b;
C c;
}
}
void too(Val val)
{
final switch (val.tag)
{
case Tag.A: writeln(val.a); break;
case Tag.B: writeln(val.b); break;
case Tag.C: writeln(val.c); break;
}
}
there's no reason this should be faster than Algebraic(restricted
variant) from std.variant, is there? implementation issue?
Re: extern(C++) linker errors
bitwise bitwise@gmail.com writes: I am trying to interface to C++, and getting linker errors. Below are my 3 source files and 2 build scripts with their associated errors. Can anyone see what I'm doing wrong? Hi, I think both examples need libstdc++ added when you link (-L-lstdc++). That should resolve the missing C++ operators. For script1.sh with ldc2 I see an extra underscore in C++ mangled names. You must be on OS X. ldc was just fixed in merge-2.067 branch to remove an extra underscore on OS X. If you want to experiment, you can build https://github.com/ldc-developers/ldc/tree/merge-2.067 and check it out. There are still a few tests to reolve, but it works pretty well for me. -- Dan
Re: how does isInputRange(T) actually work?
On Tuesday, 21 April 2015 at 19:42:42 UTC, anonymous wrote:
On Tuesday, 21 April 2015 at 19:17:56 UTC, kevin wrote:
On Tuesday, 21 April 2015 at 19:13:34 UTC, Meta wrote:
On Tuesday, 21 April 2015 at 19:11:43 UTC, John Colvin wrote:
On Tuesday, 21 April 2015 at 19:06:39 UTC, kevin wrote:
enum bool isInputRange = is(typeof(
(inout int = 0)
{
R r = R.init; // can define a range object
if (r.empty) {} // can test for empty
r.popFront(); // can invoke popFront()
auto h = r.front; // can get the front of the range
}));
[...]
Also, what is the purpose of typeof? I would have expected a
simple is() to work just fine.
(In this most simple form,) `is` evaluates to true if the
argument is a valid type. A function/delegate literal isn't a
type.
If you passed the lambda expression itself to `is`, the result
would always be false. As it is, the result is true when the
lambda expression compiles (so it has a valid type).
More about the IsExpression:
http://dlang.org/expression.html#IsExpression
That makes sense. It seems to me that D has very... special but
effective syntax. I'm having a hard time remembering all the
keywords and expression forms (especially of IsExpression) but
it's definitely a vast improvement over C++'s half baked pile of
whatever. Thanks for the help, everyone.
GetModuleHandle
Hi. I am trying to use the Excel API with latest release dmd on Win 32. It looks like GetModuleHandle isn't in the D windows header anymore. Should I try to use GetModuleHandleA or B ? Thoughts?
Re: string to thread
Is there any update on this? This question of the distinction
between reading/writing to a file stream vs to a string seems
recurrent.
I am interested in writing to a string and am wondering if there
is a reason for having to use explicitly the convenience
functions std.conv.text() (or to!string()) and
std.string.format() when one would expect to be able to do:
string s;
int n = 10;
s.writeln(Hello , n, times); // s == Hello 10 times\n
s.writefln(and %d times, n); // s == Hello 10 times\nand 10
times\n
There is a simple way to emulate this by expanding on string:
struct sstring {
string _s;
alias _s this; // treat sstring just like _s, a string
this(string literal = ) { _s = literal; }
void write(Args...)(Args args) { foreach(a; args) {_s ~=
to!string(a);} }
void writeln(Args...)(Args args) { this.write(args, '\n'); }
void writef(Char, Args...)(in Char[] fmt, Args args) { _s ~=
std.string.format(fmt, args); }
void writefln(Char, Args...)(in Char[] fmt, Args args) {
this.writef(fmt ~ '\n', args); }
}
An 'sstring s;' can be then be used just like a normal 'string'
with the addition of being able to use it as in the example above.
I suspect something similar could be done for reading.
Why the syntactic burden of having to use to!string,
std.string.format, std.conv.parse etc?
Re: how does isInputRange(T) actually work?
On Wednesday, 22 April 2015 at 21:22:43 UTC, Meta wrote:
That makes sense. It seems to me that D has very... special
but effective syntax. I'm having a hard time remembering all
the keywords and expression forms (especially of IsExpression)
but it's definitely a vast improvement over C++'s half baked
pile of whatever. Thanks for the help, everyone.
The `is` expression is complicated and has a bunch of different
usage syntax, but it's like one of those little multitools.
Complicated to figure out how to use, but extremely flexible
and able to do a lot of cool things.
Yeah, the `is` expression is one of my favorite D features.
import std.container;
template Substitute (T, U) {
static if (is (T == F!V, alias F, V))
alias Substitute = F!U;
}
alias List = SList!int;
static assert (is (Substitute!(List, char) == SList!char));
It's the little things.
Startup files for STM32F4xx
I've now created a few startup files for the STM32F4xx microcontrollers. You can grab them here ... http://d.gpio.dk/cgi-bin/gitweb.cgi ... Unfortunately I have no 'read-only' checkout on my git-server, but I'll be happy to make a tar.bz2 archive upon request.
Re: how does isInputRange(T) actually work?
That makes sense. It seems to me that D has very... special but effective syntax. I'm having a hard time remembering all the keywords and expression forms (especially of IsExpression) but it's definitely a vast improvement over C++'s half baked pile of whatever. Thanks for the help, everyone. The `is` expression is complicated and has a bunch of different usage syntax, but it's like one of those little multitools. Complicated to figure out how to use, but extremely flexible and able to do a lot of cool things.
Re: Startup files for STM32F4xx
On Thursday, 23 April 2015 at 04:48:16 UTC, Rikki Cattermole wrote: On 23/04/2015 2:41 p.m., Jens Bauer wrote: ... Unfortunately I have no 'read-only' checkout on my git-server, but I'll be happy to make a tar.bz2 archive upon request. Make a github mirror if you don't want to push it directly there. That might work. I had to create my own git server, because GitHub does not work with any of my Web-browsers. -The only thing I can do with a Web-browser is to fork another repository and post comments. This is basically because GitHub's buttons do not work on my browsers. I'll try and make an attempt to set up a mirror tomorrow, but it might be easier setting up gitolite with HTTP anyway. ;)
Re: Startup files for STM32F4xx
On 23/04/2015 4:53 p.m., Jens Bauer wrote: On Thursday, 23 April 2015 at 04:48:16 UTC, Rikki Cattermole wrote: On 23/04/2015 2:41 p.m., Jens Bauer wrote: ... Unfortunately I have no 'read-only' checkout on my git-server, but I'll be happy to make a tar.bz2 archive upon request. Make a github mirror if you don't want to push it directly there. That might work. I had to create my own git server, because GitHub does not work with any of my Web-browsers. -The only thing I can do with a Web-browser is to fork another repository and post comments. This is basically because GitHub's buttons do not work on my browsers. I'll try and make an attempt to set up a mirror tomorrow, but it might be easier setting up gitolite with HTTP anyway. ;) Ehh, maybe you should setup a e.g. vm of e.g. Linux Mint and use e.g. Github via it. After all, not having a web browser working for it isn't an excuse when all the main ones do ;)
Re: Startup files for STM32F4xx
On 23/04/2015 2:41 p.m., Jens Bauer wrote: I've now created a few startup files for the STM32F4xx microcontrollers. You can grab them here ... http://d.gpio.dk/cgi-bin/gitweb.cgi ... Unfortunately I have no 'read-only' checkout on my git-server, but I'll be happy to make a tar.bz2 archive upon request. Make a github mirror if you don't want to push it directly there.
Re: GetModuleHandle
On Wednesday, 22 April 2015 at 19:37:35 UTC, John Chapman wrote: On Wednesday, 22 April 2015 at 18:31:20 UTC, Laeeth Isharc wrote: Hi. I am trying to use the Excel API with latest release dmd on Win 32. It looks like GetModuleHandle isn't in the D windows header anymore. Should I try to use GetModuleHandleA or B ? Thoughts? Import core.sys.windows.windows and pick either GetModuleHandleA (ANSI) or GetModuleHandleW (Unicode, preferred). Thank you.
Download DDMD?
Just curious, but I was wondering if there was a 2.067 DDMD available for download somewhere for Windows. If not, then are there any special build instructions I need to build it? I kind of just want to try a couple of things, so I would rather I not have to build it if I can avoid it.
Re: Download DDMD?
On Wednesday, 22 April 2015 at 07:57:40 UTC, Jeremiah DeHaan wrote: Just curious, but I was wondering if there was a 2.067 DDMD available for download somewhere for Windows. If not, then are there any special build instructions I need to build it? I kind of just want to try a couple of things, so I would rather I not have to build it if I can avoid it. the 2.067 ddmd is available as a static library. For the moment it only includes the lexer and the parser: https://github.com/yebblies/ddmd it does not require anything specific to build: pass the sources, set the -lib switch, maybe set the warnings/depreciations to off because there are some small syntax issues (C-stle array or switch case fallthrough).
