Re: Compiler ?? (dynamic inclusion)
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what's wrong with a preprocessor? That's all it would be if Rob added =
it. Accept you would have the minor convenience of a single compilation, =
instead of precompiling, then compiling. But you can get around this =
with a simple batch file.
----- Original Message -----=20
From: Irv Mullins=20
To: EUPHORIA at LISTSERV.MUOHIO.EDU=20
Sent: Tuesday, June 06, 2000 3:28 PM
Subject: Re: Compiler ?? (dynamic inclusion)
On Tue, 06 Jun 2000, you wrote:
> Hrm.. well, let me explain just why I'd like conditional compilation =
(and
> conditional interpretation).
>
> Suppose you've written a library (or a program) that you want to be
> compilable on any platform. The problem is that this library uses
> OS-specific stuff. What to do? Write one version for each OS? Nah, =
do it
> like this instead:
>
> -- Suppose this is the Windows version
> define WIN32
>
> ifdef DOS32
> -- DOS specific stuff goes here
> endif
> ifdef WIN32
> -- Windows
> endif
> ifdef LINUX
> -- ..and finally Linux
> endif
Now I agree with you - we already have platform() which defines
Linux/Win/Dos, so we can write platform dependent code.
if platform() =3D LINUX then
x =3D 4 ... etc.
elsif platform() =3D DOS then ...
However, what we really need is conditional _includes_, for example,
if platform() =3D LINUX then include xgraphics.e
elsif platform() =3D DOS then include graphics.e ....
I don't know why this would be hard to add to Euphoria.
Irv
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<DIV><FONT color=3D#0000ff face=3D"Comic Sans MS">what's wrong with a =
preprocessor?=20
That's all it would be if Rob added it. Accept you would have the minor=20
convenience of a single compilation, instead of precompiling, then =
compiling.=20
But you can get around this with a simple batch file.</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:irv at ELLIJAY.COM" title=3Dirv at ELLIJAY.COM>Irv =
Mullins</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:EUPHORIA at LISTSERV.MUOHIO.EDU"=20
title=3DEUPHORIA at LISTSERV.MUOHIO.EDU>EUPHORIA at LISTSERV.MUOHIO.EDU</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, June 06, 2000 =
3:28=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Compiler ?? =
(dynamic=20
inclusion)</DIV>
<DIV><BR></DIV>
<DIV>On Tue, 06 Jun 2000, you wrote:<BR>> Hrm.. well, let me =
explain just=20
why I'd like conditional compilation (and<BR>> conditional=20
interpretation).<BR>><BR>> Suppose you've written a library (or =
a=20
program) that you want to be<BR>> compilable on any platform. The =
problem=20
is that this library uses<BR>> OS-specific stuff. What to do? Write =
one=20
version for each OS? Nah, do it<BR>> like this =
instead:<BR>><BR>> --=20
Suppose this is the Windows version<BR>> define =
WIN32<BR>><BR>> ifdef=20
DOS32<BR>> -- DOS specific stuff goes here<BR>> endif<BR>> =
ifdef=20
WIN32<BR>> -- Windows<BR>> endif<BR>> ifdef LINUX<BR>> -- =
..and=20
finally Linux<BR>> endif<BR><BR>Now I agree with you - we already =
have=20
platform() which defines<BR>Linux/Win/Dos, so we can write platform =
dependent=20
code.<BR>if platform() =3D LINUX then<BR> x =3D 4 ... =
etc.<BR>elsif=20
platform() =3D DOS then ...<BR><BR>However, what we really need is =
conditional=20
_includes_, for example,<BR>if platform() =3D LINUX then include=20
xgraphics.e<BR>elsif platform() =3D DOS then include graphics.e =
....<BR><BR>I=20
don't know why this would be hard to add to=20
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