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digitalmars.D.learn - how to get timestamp in compile-time?

reply =?ISO-8859-1?Q?Z=f3lyomi_Istvan?= <istvan.zolyomi gmail.com> writes:
Hi,

recently I've been experimenting with metaprogramming in D. I've been trying to
create a simple compiler benchmark that can be used like the following
oversimplified code:

const time starttime = gettime();
mixin(code); // or any other metaprogramming activity (or even simple code)
const time endtime = gettime();
pragma(msg, "Compiled in ", endtime - starttime);

It works fine with the exception of getting the current time. Unfortunately,
I've found no ctfe-capable library function to get the time, and it turned out
that special tokens like __TIME__ and its kind are evaluated once during
compilation, so it always returns the same time for the same compilation unit.

Do you have any idea how to get the time in compile-time?

thanks

István
Mar 23 2010
parent reply "Simen kjaeraas" <simen.kjaras gmail.com> writes:
On Tue, 23 Mar 2010 08:35:54 +0100, Z=C3=B3lyomi Istvan  =

<istvan.zolyomi gmail.com> wrote:

 Hi,

 recently I've been experimenting with metaprogramming in D. I've been =

 trying to create a simple compiler benchmark that can be used like the=

 following oversimplified code:

 const time starttime =3D gettime();
 mixin(code); // or any other metaprogramming activity (or even simple =

 code)
 const time endtime =3D gettime();
 pragma(msg, "Compiled in ", endtime - starttime);

 It works fine with the exception of getting the current time.  =

 Unfortunately, I've found no ctfe-capable library function to get the =

 time, and it turned out that special tokens like __TIME__ and its kind=

 are evaluated once during compilation, so it always returns the same  =

 time for the same compilation unit.

 Do you have any idea how to get the time in compile-time?

 thanks

 Istv=C3=A1n

Currently not possible, as far as I know. If you must, try instead to make a tiny program that launches DMD, and times its running time. -- = Simen
Mar 23 2010
parent BCS <none anon.com> writes:
Hello Simen,

 On Tue, 23 Mar 2010 08:35:54 +0100, Zólyomi Istvan
 <istvan.zolyomi gmail.com> wrote:
 
 Hi,
 
 recently I've been experimenting with metaprogramming in D. I've been
 trying to create a simple compiler benchmark that can be used like
 the  following oversimplified code:
 
 const time starttime = gettime();
 mixin(code); // or any other metaprogramming activity (or even simple
 code)
 const time endtime = gettime();
 pragma(msg, "Compiled in ", endtime - starttime);
 It works fine with the exception of getting the current time.
 Unfortunately, I've found no ctfe-capable library function to get the
 time, and it turned out that special tokens like __TIME__ and its
 kind  are evaluated once during compilation, so it always returns the
 same  time for the same compilation unit.
 
 Do you have any idea how to get the time in compile-time?
 
 thanks
 
 István
 

If you must, try instead to make a tiny program that launches DMD, and times its running time.

Or grab an existing one (*nix has 'time' for that). -- ... <IXOYE><
Mar 23 2010