better c fibers
Hi there, I'm new in dlang I specially like betterC. I was hoping that d fibers would be implemented in without using classes, but there are not. Is there another way how to use async/await in dlang better c? Thank you for your help Abby
mixins
Hello I would like to create validation mixin or mixin template
which would return on error.
Something like this:
```
mixin template Validate(a, b)
{
if(a > b)
{
writeln("invalid input");
return false;
}
}
bool test(a,b)
{
mixin Validate!(a,b);
on valid code
return true;
}
```
package libs on windows
Hi there, I'm using d2sqlite3 package on windows with dub, the problem I have is that when I compiling the app linking fails because LINK : fatal error LNK1181: cannot open input file 'sqlite3.lib'. I would like to know if there is a way to set path to lib to downloaded with package instead of harcoded. libs "C:\\Users\\abby\\AppData\\Local\\dub\\packages\\d2sqlite3-0.18.3\\d2sqlite3\\source\\d2sqlite3\\lib\\win64\\sqlite3" platform="windows" Thank you very much for your help
betterC CTFE nested switch
Hi there guys,
I was trying to generated code during compile time. Bassicly I'm
creating a tokenizer and I would like to generated nested switch
using betterC.
Basically convert something like this:
enum tokens =
[
['!', '='],
['>', '='],
['>'],
];
to:
switch(str[i])
{
case '!':
switch(str[i + 1])
{
case '=':
onToken(['!', '=']);
break;
default: break;
}
break;
case '>':
switch(str[i + 1])
{
case '=':
onToken(['>', '=']);
break;
default:
onToken(['>']);
break;
}
break;
default: break;
}
but right now I'm stuck and I don't know how to achieve this. I
was able to find out that:
1) Switches has to be labeled and the only way I know how to do
so is to use string code and then mixing it. I was hoping for
example to mixing only labels before switch and after continue
and break but this does not seem to work :/
2) Format does not work in compile time using betterC (sprintf
also does not work
Thank you very much for any kind if help
Kind regards Abby
Re: betterC CTFE nested switch
On Monday, 17 February 2020 at 11:05:46 UTC, Stefan Koch wrote: On Monday, 17 February 2020 at 10:18:32 UTC, Abby wrote: Hi there guys, I was trying to generated code during compile time. Bassicly I'm creating a tokenizer and I would like to generated nested switch using betterC. [...] I have a ctfe compatible string formatter, you should be to find it here https://forum.dlang.org/post/hmyxvknbdqtlnxvqq...@forum.dlang.org I hope that helps, Regards, Stefan : Hi Stefan, thank you very much for your reply but I could not find the source code or package name anywhere in that forum thread, I was only able to find this https://github.com/UplinkCoder/ctfeutils on github, but it's empty for me. Can you please help and point me to somewhere so I can try it out? Thank you very much Kind regards Abby
Re: betterC CTFE nested switch
On Monday, 17 February 2020 at 19:02:50 UTC, Stefan Koch wrote: Sorry I just realized I never published the code. I am going to add it to ctfeutils. Thank you very much
Re: betterC CTFE nested switch
On Monday, 17 February 2020 at 19:02:50 UTC, Stefan Koch wrote: Sorry I just realized I never published the code. I am going to add it to ctfeutils. Hi Stefan, I'm sorry to bother you, I just wanted to kindly ask if you would upload the formatter to ctfeutils on github it would help me alot. Thank you very much Kind regards Abby
String switch is odd using betterC
I have a simple enum of strings like so:
enum Alphabet : string
{
a = "A",
b = "B",
c = "C",
d = "D",
e = "E",
f = "F",
g = "G"
}
and then simple final switch like so:
extern(C) void main()
{
auto s = Alphabet.f;
final switch(s)
{
case Alphabet.a: break;
case Alphabet.b: break;
case Alphabet.c: break;
case Alphabet.d: break;
case Alphabet.e: break;
case Alphabet.f: break;
case Alphabet.g: break;
}
}
The problem I have is that this causes:
/dlang/dmd/linux/bin64/../../src/druntime/import/object.d(2999):
Error: TypeInfo cannot be used with -betterC
Odd think is that wehen I remove g from my enum it compiles just
fine, so it seems that this compilation error occurs only when my
enum has more then 6 members.
Any idea why?
Re: String switch is odd using betterC
On Wednesday, 26 February 2020 at 08:25:00 UTC, Abby wrote:
/dlang/dmd/linux/bin64/../../src/druntime/import/object.d(2999): Error:
TypeInfo cannot be used with -betterC
Odd think is that wehen I remove g from my enum it compiles
just fine, so it seems that this compilation error occurs only
when my enum has more then 6 members.
Any idea why?
Ok so this is enough to reproduce the problem
extern(C) void main()
{
auto s = "F";
final switch(s)
{
case "A": break;
case "B": break;
case "C": break;
case "D": break;
case "E": break;
case "F": break;
case "G": break;
}
}
Re: String switch is odd using betterC
On Wednesday, 26 February 2020 at 08:25:00 UTC, Abby wrote:
Any idea why?
Ok so this is enough to produce the same result, it seems that
there is a problem in string switch when there is more the 6
cases.
extern(C) void main()
{
auto s = "F";
final switch(s)
{
case "A": break;
case "B": break;
case "C": break;
case "D": break;
case "E": break;
case "F": break;
case "G": break;
}
}
string to char* in betterC
What is the proper way to get char* from string which is used in c functions? toStringz does returns: /usr/include/dmd/phobos/std/array.d(965,49): Error: TypeInfo cannot be used with -betterC and I think string.ptr is not safe because it's not zero termined. So what should I do? realloc each string with /0? Thank you for your help
exporting function from betterc to windows dll
I would like to export some functions from my bettec dll for
dotnet core application in windows.
Right now I have compiled dll using dmd v2.091.0-dirty simply by
´dub build´
this is the function I have
extern(C) char* test_echo(const(char)* line, size_t len, ref
size_t resLen)
{
enum format = "{\"message\": \"%s\"}\n";
auto response = cast(char*)malloc(format.length + len);
resLen = sprintf(response, format, line);
return response;
}
and this is my dotnet core equivalent
[DllImport(DllName, CallingConvention =
CallingConvention.StdCall)]
static extern IntPtr
test_echo([MarshalAs(UnmanagedType.LPStr)]string line, ulong len,
out ulong resLen);
This works for me in linux but does not in windows, any idea what
I'm doing wrong?
This is the output from dotnet core
Unhandled exception. System.EntryPointNotFoundException: Unable
to find an entry point named 'test_echo' in DLL 'test.dll'
dub libs from home directory on windows
Hi there, I'm using d2sqlite3 which has dependency on sqlite3.lib. When I'm building my app on windows I have a dub.sdl which has a line libs "%USERPROFILE%/AppData/Local/dub/packages/d2sqlite3-0.18.3/d2sqlite3/lib/win64/sqlite3" platform="windows-x86_64-dmd" but unless I specify full path using specific user profile name on windows like so "c:/user/abby/AppData/Local/dub/packages/d2sqlite3-0.18.3/d2sqlite3/lib/win64/sqlite3" I cannot build my app, so I was wondering if there is some clever way to solve this without hardcoded path to my profile name. Thank you very much for your help.
return val if
Is there a way to create a template that would do the same is glib
g_return_val_if_fail()
(https://developer.gnome.org/glib/stable/glib-Warnings-and-Assertions.html#g-return-val-if-fail)
I was hoping something like this would work
template returnValIfFail(alias expr, alias val)
{
if(expr) return val;
}
