see the code below:

// file: versionctrl.d
module versionctrl;
version(ANSI){
}else{
// want to use unicode as default
version = UNICODE;
}

// file: test.d
module test;

import versionctrl;

class Test{
version(ANSI){
void foo(){ printf("Ansi version\n");}
}
version(UNICODE){
void foo(){ printf("Unicode version\n");}
}
}

void main(){
Test t = new Test();
t.foo();
}

// compiled with no version set, Unicode desired dmd versionctrl.d test.d


test.d(16): no property 'foo' for type 'test.Test'
test.d(16): function expected before (), not 1 of type int


// it seems that DMD didn't check the version for // versionctrl.d though it is imported by test.d

In article <dd73ap$1t2f$1@digitaldaemon.com>, Shawn Liu says...
>
>see the code below:
>
>// file: versionctrl.d
>module versionctrl;
>version(ANSI){
>}else{
>// want to use unicode as default
>version = UNICODE;
>}
>

we can copy the content of "versionctrl.d" to the top of the "test.d" to solve
this.
but copy hundreds of this content in a big project is annoying.
Can we just import the "versionctrl"?

"Shawn Liu" <Shawn_member@pathlink.com> wrote in message news:dd74t8$1umg$1@digitaldaemon.com...
> In article <dd73ap$1t2f$1@digitaldaemon.com>, Shawn Liu says...
>>
>>see the code below:
>>
>>// file: versionctrl.d
>>module versionctrl;
>>version(ANSI){
>>}else{
>>// want to use unicode as default
>>version = UNICODE;
>>}
>>
>
> we can copy the content of "versionctrl.d" to the top of the "test.d" to
> solve
> this.
> but copy hundreds of this content in a big project is annoying.
> Can we just import the "versionctrl"?

Pass the version info to the compiler at the command-line. Version statements only affect the module in which they live.

see the example from D page, http://www.digitalmars.com/d/version.html#version


	version (ProfessionalEdition)
	{
	    version = FeatureA;
	    version = FeatureB;
	    version = FeatureC;
	}
	version (HomeEdition)
	{
	    version = FeatureA;
	}
	...
	version (FeatureB)
	{
	    ... implement Feature B ...
	}





Suppose we have several files (maybe hundreds of files) in a project, we
have to copy above code into EVERY file.
Otherwise the code inside version(FeatureB) will not be compiled.

Another way is passing "-version=FeatureB -version = FeatureC" to the
compiler as you said.
If so, the "version = ???" feature seems useless.


This is far different from C. If we define some thing in previous h file, the current file will inherit those feature when the previous file is included.



"Ben Hinkle" <ben.hinkle@gmail.com> wrote:dd7hlg$2an2$1@digitaldaemon.com...
>
> "Shawn Liu" <Shawn_member@pathlink.com> wrote in message news:dd74t8$1umg$1@digitaldaemon.com...
>> In article <dd73ap$1t2f$1@digitaldaemon.com>, Shawn Liu says...
>>>
>
> Pass the version info to the compiler at the command-line. Version statements only affect the module in which they live.
> 

On Tue, 9 Aug 2005 00:16:07 +0800, Shawn Liu wrote:

> see the example from D page, http://www.digitalmars.com/d/version.html#version
> 
> 
> 	version (ProfessionalEdition)
> 	{
> 	    version = FeatureA;
> 	    version = FeatureB;
> 	    version = FeatureC;
> 	}
> 	version (HomeEdition)
> 	{
> 	    version = FeatureA;
> 	}
> 	...
> 	version (FeatureB)
> 	{
> 	    ... implement Feature B ...
> 	}
> 
> 
> 
> 
> 
> Suppose we have several files (maybe hundreds of files) in a project, we
> have to copy above code into EVERY file.
> Otherwise the code inside version(FeatureB) will not be compiled.
> 
> Another way is passing "-version=FeatureB -version = FeatureC" to the
> compiler as you said.
> If so, the "version = ???" feature seems useless.
> 
> 
> This is far different from C. If we define some thing in previous h file, the current file will inherit those feature when the previous file is included.

Sounds like an enhancement I could make to Build...

  version(build) pragma(export_version, "FeatureB");

to place "-version=FeatureB" on the dmd command line automatically for you.

Something like that anyway. What do you guys think?

-- 
Derek Parnell
Melbourne, Australia
9/08/2005 2:27:04 AM