• Robert Fraser <fraserofthenight gmail.com> May 19 2008
• Bill Baxter <dnewsgroup billbaxter.com> May 19 2008
• Robert Fraser <fraserofthenight gmail.com> May 19 2008
• Bill Baxter <dnewsgroup billbaxter.com> May 19 2008
• Sean Kelly <sean invisibleduck.org> May 19 2008
• "Chris R. Miller" <lordSaurontheGreat gmail.com> May 19 2008
• Sean Kelly <sean invisibleduck.org> May 19 2008
• Mike Parker <aldacron gmail.com> May 19 2008

Robert Fraser <fraserofthenight gmail.com> writes:

Is there a reliable way to deduce whether the user is using Tango or 
Phobos? I used to use:

static if(is(typeof(object.toUtf8)))

But since that got changed to toString that doesn't work right now. For 
the time being, I can verify it's D1 and then use (with Tango 0.99.6)

static if(!is(typeof(string)))

But I'm guessing Tango may be given a string type soon...?

Bill Baxter <dnewsgroup billbaxter.com> writes:

Robert Fraser wrote:
 Is there a reliable way to deduce whether the user is using Tango or 
 Phobos? I used to use:
 
 static if(is(typeof(object.toUtf8)))
 
 But since that got changed to toString that doesn't work right now. For 
 the time being, I can verify it's D1 and then use (with Tango 0.99.6)
 
 static if(!is(typeof(string)))
 
 But I'm guessing Tango may be given a string type soon...?


version(Tango) { ... } else { ... }  ?

--bb

Robert Fraser <fraserofthenight gmail.com> writes:

Bill Baxter wrote:
 Robert Fraser wrote:
 Is there a reliable way to deduce whether the user is using Tango or 
 Phobos? I used to use:

 static if(is(typeof(object.toUtf8)))

 But since that got changed to toString that doesn't work right now. 
 For the time being, I can verify it's D1 and then use (with Tango 0.99.6)

 static if(!is(typeof(string)))

 But I'm guessing Tango may be given a string type soon...?


 version(Tango) { ... } else { ... }  ?
 
 --bb


That requires the user to specify -version=Tango . I'm looking for 
something that can be compiled with either Tango or Phobos without 
asking anything of the user.

Bill Baxter <dnewsgroup billbaxter.com> writes:

Robert Fraser wrote:
 Bill Baxter wrote:
 Robert Fraser wrote:
 Is there a reliable way to deduce whether the user is using Tango or 
 Phobos? I used to use:

 static if(is(typeof(object.toUtf8)))

 But since that got changed to toString that doesn't work right now. 
 For the time being, I can verify it's D1 and then use (with Tango 
 0.99.6)

 static if(!is(typeof(string)))

 But I'm guessing Tango may be given a string type soon...?


 version(Tango) { ... } else { ... }  ?

 --bb


 That requires the user to specify -version=Tango . I'm looking for 
 something that can be compiled with either Tango or Phobos without 
 asking anything of the user.


But it's part of the standard Tango install/setup procedure.  If you 
follow the instructions for how to install Tango, then you will always 
have -version=Tango set when using Tango.  Are you worried about the 
case where someone has not followed Tango's install procedures properly?

--bb

Sean Kelly <sean invisibleduck.org> writes:

Robert Fraser wrote:
 Bill Baxter wrote:
 Robert Fraser wrote:
 Is there a reliable way to deduce whether the user is using Tango or 
 Phobos? I used to use:

 static if(is(typeof(object.toUtf8)))

 But since that got changed to toString that doesn't work right now. 
 For the time being, I can verify it's D1 and then use (with Tango 
 0.99.6)

 static if(!is(typeof(string)))

 But I'm guessing Tango may be given a string type soon...?


 version(Tango) { ... } else { ... }  ?

 --bb


 That requires the user to specify -version=Tango . I'm looking for 
 something that can be compiled with either Tango or Phobos without 
 asking anything of the user.


Tango actually requires that version=Tango be set for the installation 
to be considered complete.  I suppose we could enforce this by adding a 
static failure condition to Tango's object.d file, but I'd like to think 
that making it a default part of the bundled Tango installs and 
documenting the requirement in our manual install docs would be sufficient.


Sean

"Chris R. Miller" <lordSaurontheGreat gmail.com> writes:

Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable

Sean Kelly wrote:
 Robert Fraser wrote:
 That requires the user to specify -version=3DTango . I'm looking for=20
 something that can be compiled with either Tango or Phobos without=20
 asking anything of the user.


 Tango actually requires that version=3DTango be set for the installatio=


 to be considered complete.  I suppose we could enforce this by adding a=


 static failure condition to Tango's object.d file, but I'd like to thin=


 that making it a default part of the bundled Tango installs and=20
 documenting the requirement in our manual install docs would be suffici=



I also wonder how that would behave with Tangobos, which could cause=20
issues with Phobos code expecting a version=3DPhobos, which would conflic=
t=20
with version=3DTango.  Perhaps I'm wrong, but that could present a proble=
m.

Sean Kelly <sean invisibleduck.org> writes:

Chris R. Miller wrote:
 Sean Kelly wrote:
 Robert Fraser wrote:
 That requires the user to specify -version=Tango . I'm looking for 
 something that can be compiled with either Tango or Phobos without 
 asking anything of the user.


 Tango actually requires that version=Tango be set for the installation 
 to be considered complete.  I suppose we could enforce this by adding 
 a static failure condition to Tango's object.d file, but I'd like to 
 think that making it a default part of the bundled Tango installs and 
 documenting the requirement in our manual install docs would be 
 sufficient.


 I also wonder how that would behave with Tangobos, which could cause 
 issues with Phobos code expecting a version=Phobos, which would conflict 
 with version=Tango.  Perhaps I'm wrong, but that could present a problem.


I'd probably still set version=Tango in that instance, but the user 
could probably set either or both safely, depending on how third party 
libraries are implemented.


Sean

Mike Parker <aldacron gmail.com> writes:

Robert Fraser wrote:
 Bill Baxter wrote:
 Robert Fraser wrote:
 Is there a reliable way to deduce whether the user is using Tango or 
 Phobos? I used to use:

 static if(is(typeof(object.toUtf8)))

 But since that got changed to toString that doesn't work right now. 
 For the time being, I can verify it's D1 and then use (with Tango 
 0.99.6)

 static if(!is(typeof(string)))

 But I'm guessing Tango may be given a string type soon...?


 version(Tango) { ... } else { ... }  ?

 --bb


 That requires the user to specify -version=Tango . I'm looking for 
 something that can be compiled with either Tango or Phobos without 
 asking anything of the user.


I've been using this in Derelict for a long while now with no complaints 
and I know it's used in other libraries. Any one who doesn't have 
version=Tango defined when using Tango will find himself with a broken 
installation.