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digitalmars.D - module dhelper is in file 'dhelper.d' which cannot be read

reply "Milvakili" <maliy.kayit gmail.com> writes:
I'm new to D and got confused with the dmd.  I assume I have the 
following codes in some folder x with all relevant extra files. 
Should use .di files to import from other modules or the d file 
itself is sufficient to import a module

In c++, gcc -c x/cmain.cpp wil compile without any error.

****cmain.cpp***
#include <iostream>
#include "chelper.h"

int main(){
   std::cout << "Printing from cmain\n" ;
   chelper_foo("cmain");
   return 0;
}

In D, dmd -c x/dmain.d will complainsabout dhelper.d file which 
is in the x folder.  What should I do to get  rid of this error?  
dmd -c x/dmain.d x/dhelper.d compiles but I do not want that.

****dmain.d***
import std.stdio;
import dhelper;

void main(){
   writefln("Hi from d");
   dhelper_foo("dmain");
}
Jun 30 2013
next sibling parent "Steven Schveighoffer" <schveiguy yahoo.com> writes:
On Sun, 30 Jun 2013 19:58:51 -0400, Milvakili <maliy.kayit gmail.com>  
wrote:


 I'm new to D and got confused with the dmd.  I assume I have the  
 following codes in some folder x with all relevant extra files. Should  
 use .di files to import from other modules or the d file itself is  
 sufficient to import a module

 In c++, gcc -c x/cmain.cpp wil compile without any error.

 ****cmain.cpp***
 #include <iostream>
 #include "chelper.h"

 int main(){
    std::cout << "Printing from cmain\n" ;
    chelper_foo("cmain");
    return 0;
 }

 In D, dmd -c x/dmain.d will complainsabout dhelper.d file which is in  
 the x folder.  What should I do to get  rid of this error?  dmd -c  
 x/dmain.d x/dhelper.d compiles but I do not want that.

 ****dmain.d***
 import std.stdio;
 import dhelper;

 void main(){
    writefln("Hi from d");
    dhelper_foo("dmain");
 }


The compiler can't find the dhelper source.  It looks in your search path,  
and then at the module path.

For example, if you did:

import x.dhelper;

it would compile main.  But then of course, dhelper better be told that  
it's x.dhelper and not just dhelper :)

// inside dhelper.d
module x.dhelper;

-Steve
Jun 30 2013
prev sibling parent reply "Adam D. Ruppe" <destructionator gmail.com> writes:
It might help to add -Ix to dmd, which adds the x folder to your 
import search path.

I haven't actually tried it though. I compile my D programs with 
all the files listed on the command line at once, I find it is 
simpler and often a little faster too.
Jun 30 2013
parent reply "Milvakili" <maliy.kayit gmail.com> writes:
On Monday, 1 July 2013 at 00:35:07 UTC, Adam D. Ruppe wrote:

 It might help to add -Ix to dmd, which adds the x folder to 
 your import search path.

 I haven't actually tried it though. I compile my D programs 
 with all the files listed on the command line at once, I find 
 it is simpler and often a little faster too.


-I option is working for me, but the confusing thing is g++ can 
handle this by default but dmd require it to be explicitly added.

I have a situation that each code needs to be compiled 
individually :).

Thankx.
Jun 30 2013
parent Marco Leise <Marco.Leise gmx.de> writes:
Am Mon, 01 Jul 2013 03:43:27 +0200
schrieb "Milvakili" <maliy.kayit gmail.com>:


 On Monday, 1 July 2013 at 00:35:07 UTC, Adam D. Ruppe wrote:

 It might help to add -Ix to dmd, which adds the x folder to 
 your import search path.

 I haven't actually tried it though. I compile my D programs 
 with all the files listed on the command line at once, I find 
 it is simpler and often a little faster too.


 
 -I option is working for me, but the confusing thing is g++ can 
 handle this by default but dmd require it to be explicitly added.
 
 I have a situation that each code needs to be compiled 
 individually :).
 
 Thankx.
 


In D every directory is a package in the module system.
The root of that is where you invoke the compiler.

So if all your code is in "x" or in "source" or whatever you
can either switch into that directory to compile or add -Ix to
the compiler command-line.

If "x" is in fact a package in your case when you think about
it, use the correct "import x.dhelper;"

P.S.: You never need .di files unless you have to hide the
implementation. And when you use them, they are handled
exactly the same as their original .d file.

-- 
Marco
Jun 30 2013