• Andrey (25/25) Apr 19 2018 Hello,
• user1234 (3/26) Apr 19 2018 The run-time is not already initialized but the "new" operator
• Andrey (2/4) Apr 19 2018 What will be a solution?
• Andrey (3/4) Apr 19 2018 It seems to me that I found a solution - just replace WinMain()
• Mike Parker (13/17) Apr 19 2018 That's fine when you want a console app, but it leaves you with a

Andrey <saasecondbox yandex.ru> writes:

Hello,
I wrote a small test code with WinApi:

----------------------------------------------------
import core.runtime;
import std.utf;

import core.sys.windows.windows;
import core.sys.windows.wingdi;

class Test
{
     public this() nothrow
     {

     }
}

extern(Windows)
int WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR lpCmdLine, int 
nCmdShow)
{
     new Test(); // error is here
     return 0;
}
----------------------------------------------------

When I run it, there is an error: Program exited with code 1.

If I comment "new Test();" - no error happens. Why? How to create 
instances of classes?

DMD v2.077.1, Windows 10.

user1234 <user1234 12.nj> writes:

On Thursday, 19 April 2018 at 08:13:00 UTC, Andrey wrote:
 Hello,
 I wrote a small test code with WinApi:

 ----------------------------------------------------
 import core.runtime;
 import std.utf;

 import core.sys.windows.windows;
 import core.sys.windows.wingdi;

 class Test
 {
     public this() nothrow
     {

     }
 }

 extern(Windows)
 int WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR lpCmdLine, 
 int nCmdShow)
 {
     new Test(); // error is here
     return 0;
 }
 ----------------------------------------------------

 When I run it, there is an error: Program exited with code 1.

 If I comment "new Test();" - no error happens. Why?

The run-time is not already initialized but the "new" operator 
relies on it.

Andrey <saasecondbox yandex.ru> writes:

On Thursday, 19 April 2018 at 08:24:55 UTC, user1234 wrote:
 The run-time is not already initialized but the "new" operator 
 relies on it.

What will be a solution?

Andrey <saasecondbox yandex.ru> writes:

On Thursday, 19 April 2018 at 08:37:19 UTC, Andrey wrote:
 What will be a solution?

It seems to me that I found a solution - just replace WinMain() 
with main().

Mike Parker <aldacron gmail.com> writes:

On Thursday, 19 April 2018 at 11:21:52 UTC, Andrey wrote:
 On Thursday, 19 April 2018 at 08:37:19 UTC, Andrey wrote:
 What will be a solution?

 It seems to me that I found a solution - just replace WinMain() 
 with main().

That's fine when you want a console app, but it leaves you with a 
console window automatically popping up if you create a windowed 
app.

When using WinMain, you have to manually setup and tear down 
DRuntime as described in the wiki[1]. Alternatively, you can get 
rid of the console window with a main function via linker flags 
-- when using OPTLINK (the default):

-L/SUBSYSTEM:windows

should be enough. With -m32mscoff or -m64, which uses the MS 
linker, you'll both that and this:

-L/ENTRY:mainCRTStartup

[1] https://wiki.dlang.org/D_for_Win32