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digitalmars.D.learn - How to use classes from another d files

reply Vinod K Chandran <kcvinu82 gmail.com> writes:
Hi all,
I am new to D. But some fair experience with vb.net. I was 
playing with D classes.  I wrote a class in a D file.
The file name is "classFile.d"
```D
class TestClass {

     int myIntVar        ;
     string myStringVar  ;

     this(int miv, string msv) {
         this.myIntVar = miv     ;
         this.myStringVar = msv  ;
     }//End this

}//End Class
```
And i wrote my main function in another file named "caller.d". 
Both these files are in same folder.
```D
import std.stdio ;

void main() {
     import classFile ;


     TestClass tc = new TestClass(37, "Sample String") ;
     writeln(tc.myStringVar) ;
     tc.myIntVar = 45 ;
     writeln(tc.myIntVar)  ;

     writeln("its over..") ;

}//End main
```
This is the error message i got.
;------------------------------------------------
caller.obj(caller)
  Error 42: Symbol Undefined 
__D9classFile9TestClass6__ctorMFiAyaZCQBjQBc
caller.obj(caller)
  Error 42: Symbol Undefined __D9classFile9TestClass7__ClassZ
Error: linker exited with status 2
PS E:\OneDrive Folder\OneDrive\Programming\D 
Programming\Samples\Sample2>
Oct 22 2019
next sibling parent reply Adam D. Ruppe <destructionator gmail.com> writes:
On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran 
wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was 
 playing with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"


did you compile with dmd -i or list both files on the dmd command 
line?
Oct 22 2019
parent reply Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe wrote:

 On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran 
 wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was 
 playing with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"


 did you compile with dmd -i or list both files on the dmd 
 command line?


Thanks for the reply. Nope. I just typed this code in VS Code and 
hit the run button. Thats all. i think this cmd business will be 
difficult for me.
Oct 22 2019
next sibling parent reply =?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:
On 10/22/2019 11:25 AM, Vinod K Chandran wrote:

 On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe wrote:

 On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was playing
 with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"


 did you compile with dmd -i or list both files on the dmd command line?




That: The -i switch is the answer to your question in the other post 
("what if there is too many include files").


 Thanks for the reply. Nope. I just typed this code in VS Code and hit
 the run button. Thats all.


But not sufficient. :) IDEs like VS Code have a way of describing what 
your project involves. You need to add the two files to you "project". 
(I don't know the details for your IDE.)


 i think this cmd business will be difficult
 for me.


Yes, IDEs make it convenient.

Ali
Oct 22 2019
parent Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 22 October 2019 at 18:33:32 UTC, Ali Çehreli wrote:

 On 10/22/2019 11:25 AM, Vinod K Chandran wrote:

 On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe


 wrote:

 [...]




 Chandran wrote:

 [...]






 playing

 [...]




 command line?

 That: The -i switch is the answer to your question in the other 
 post ("what if there is too many include files").


 Thanks for the reply. Nope. I just typed this code in VS Code


 and hit

 the run button. Thats all.


 But not sufficient. :) IDEs like VS Code have a way of 
 describing what your project involves. You need to add the two 
 files to you "project". (I don't know the details for your IDE.)


 i think this cmd business will be difficult
 for me.


 Yes, IDEs make it convenient.

 Ali


 Ali Çehreli,
Thanks for the detailed reply. I have tested with "dmd -i" and it 
worked.
Oct 24 2019
prev sibling parent reply Daniel Kozak <kozzi11 gmail.com> writes:
On Tue, Oct 22, 2019 at 8:30 PM Vinod K Chandran via
Digitalmars-d-learn <digitalmars-d-learn puremagic.com> wrote:

 On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe wrote:

 On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran
 wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was
 playing with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"


 did you compile with dmd -i or list both files on the dmd
 command line?


 Thanks for the reply. Nope. I just typed this code in VS Code and
 hit the run button. Thats all. i think this cmd business will be
 difficult for me.


You should use dub. You will probably need it anyway in the future.

VS Code have nice plugins to work with D
you can install D Language utility extension pack
Oct 22 2019
parent reply Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 22 October 2019 at 18:34:52 UTC, Daniel Kozak wrote:

 On Tue, Oct 22, 2019 at 8:30 PM Vinod K Chandran via 
 Digitalmars-d-learn <digitalmars-d-learn puremagic.com> wrote:

 On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe 
 wrote:

 On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K 
 Chandran wrote:

 [...]


 did you compile with dmd -i or list both files on the dmd 
 command line?


 Thanks for the reply. Nope. I just typed this code in VS Code 
 and hit the run button. Thats all. i think this cmd business 
 will be difficult for me.


 You should use dub. You will probably need it anyway in the 
 future.

 VS Code have nice plugins to work with D
 you can install D Language utility extension pack


 Daniel Kozak,
Thanks. Let me try it. :)
Oct 24 2019
parent Vinod K Chandran <kcvinu82 gmail.com> writes:
On Thursday, 24 October 2019 at 10:19:23 UTC, Vinod K Chandran 
wrote:

 On Tuesday, 22 October 2019 at 18:34:52 UTC, Daniel Kozak wrote:

 On Tue, Oct 22, 2019 at 8:30 PM Vinod K Chandran via 
 Digitalmars-d-learn <digitalmars-d-learn puremagic.com> wrote:

 On Tuesday, 22 October 2019 at 17:38:58 UTC, Adam D. Ruppe 
 wrote:

 [...]


 Thanks for the reply. Nope. I just typed this code in VS Code 
 and hit the run button. Thats all. i think this cmd business 
 will be difficult for me.


 You should use dub. You will probably need it anyway in the 
 future.

 VS Code have nice plugins to work with D
 you can install D Language utility extension pack


  Daniel Kozak,
 Thanks. Let me try it. :)



Is there any tutorials related to using dub in d lang ?
Oct 24 2019
prev sibling parent reply Arun Chandrasekaran <aruncxy gmail.com> writes:
On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran 
wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was 
 playing with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"
 ```D
 class TestClass {

 [...]


What you are seeing is a linker error. Build it as follows:

dmd caller.d classFile.d

Unrelated, first line of classFile.d needs be `module classFile`
Oct 22 2019
parent reply Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 22 October 2019 at 17:40:11 UTC, Arun Chandrasekaran 
wrote:

 On Tuesday, 22 October 2019 at 17:34:51 UTC, Vinod K Chandran 
 wrote:

 Hi all,
 I am new to D. But some fair experience with vb.net. I was 
 playing with D classes.  I wrote a class in a D file.
 The file name is "classFile.d"
 ```D
 class TestClass {

 [...]


 What you are seeing is a linker error. Build it as follows:

 dmd caller.d classFile.d

 Unrelated, first line of classFile.d needs be `module classFile`


Thanks a lot. But what if there is too many include files ? Say, 
i have 10 files to import in main file, Do i need to type all the 
file names in cmd ?
Is there any dedicated ide in order to avoid this typing task ? I 
have tested it with Codeblocks, but didn't worked.
Oct 22 2019
parent reply Adam D. Ruppe <destructionator gmail.com> writes:
On Tuesday, 22 October 2019 at 18:21:36 UTC, Vinod K Chandran 
wrote:

 But what if there is too many include files ?


The dmd -i thing will do that for you

dmd -i main.d

and it will automatically find the others, assuming they are laid 
out so the module/import name matches the file name
Oct 22 2019
parent Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 22 October 2019 at 18:31:17 UTC, Adam D. Ruppe wrote:

 On Tuesday, 22 October 2019 at 18:21:36 UTC, Vinod K Chandran 
 wrote:

 But what if there is too many include files ?


 The dmd -i thing will do that for you

 dmd -i main.d

 and it will automatically find the others, assuming they are 
 laid out so the module/import name matches the file name


 Adam D. Ruppe,
Thanks. It worked. :)
Oct 24 2019