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digitalmars.D.learn - Get date at compile time

reply Andrew <aabrown24 hotmail.com> writes:
Hi,

Is there any way to get the system date at compile time. I want 
something like:

static string compileDate = Clock.currTime.toString;

but that fails.

Thanks very much

Andrew
Oct 01 2016
next sibling parent rikki cattermole <rikki cattermole.co.nz> writes:
On 02/10/2016 3:41 AM, Andrew wrote:

 Hi,

 Is there any way to get the system date at compile time. I want
 something like:

 static string compileDate = Clock.currTime.toString;

 but that fails.

 Thanks very much

 Andrew


https://dlang.org/spec/lex.html#specialtokens
Oct 01 2016
prev sibling parent reply Adam D. Ruppe <destructionator gmail.com> writes:
On Saturday, 1 October 2016 at 14:41:22 UTC, Andrew wrote:

 Is there any way to get the system date at compile time.


Not exactly, but the special symbol __TIMESTAMP__ gets a string 
out of the compiler at build time.

http://dlang.org/spec/lex.html#specialtokens
Oct 01 2016
next sibling parent Andrew <aabrown24 hotmail.com> writes:
On Saturday, 1 October 2016 at 14:43:31 UTC, Adam D. Ruppe wrote:

 On Saturday, 1 October 2016 at 14:41:22 UTC, Andrew wrote:

 Is there any way to get the system date at compile time.


 Not exactly, but the special symbol __TIMESTAMP__ gets a string 
 out of the compiler at build time.

 http://dlang.org/spec/lex.html#specialtokens


perfect, works a treat.

Thanks both

Andrew
Oct 01 2016
prev sibling parent reply pineapple <meapineapple gmail.com> writes:
On Saturday, 1 October 2016 at 14:43:31 UTC, Adam D. Ruppe wrote:

 On Saturday, 1 October 2016 at 14:41:22 UTC, Andrew wrote:

 Is there any way to get the system date at compile time.


 Not exactly, but the special symbol __TIMESTAMP__ gets a string 
 out of the compiler at build time.

 http://dlang.org/spec/lex.html#specialtokens


Has there been consideration for adding separate integral tokens 
for day, month, year, etc?

The documentation there doesn't seem to specify but I assume 
currently the timestamps are for local time? Though I don't 
currently have any need for this feature I'd imagine that if I 
did I'd want the time in UTC, not locally, or if it was local 
that I'd at least want to be able to similarly retrieve the 
timezone info.
Oct 01 2016
next sibling parent Adam D. Ruppe <destructionator gmail.com> writes:
On Saturday, 1 October 2016 at 15:00:29 UTC, pineapple wrote:

 Has there been consideration for adding separate integral 
 tokens for day, month, year, etc?


Not that I'm aware of.

The purpose of this is more for things like version and help 
strings (e.g. "MyApp built 1 Oct 2016") than for serious 
processing, but you can also slice the string up to do more with 
it.


 The documentation there doesn't seem to specify but I assume 
 currently the timestamps are for local time?


yeah/
Oct 01 2016
prev sibling next sibling parent Jacob Carlborg <doob me.com> writes:
On 2016-10-01 17:00, pineapple wrote:


 Has there been consideration for adding separate integral tokens for
 day, month, year, etc?


I think it would be better to implement a parse function for 
std.datetime which works at compile time. We need a parse function anyway.

-- 
/Jacob Carlborg
Oct 02 2016
prev sibling parent kdevel <kdevel vogtner.de> writes:
On Saturday, 1 October 2016 at 15:00:29 UTC, pineapple wrote:

 Though I don't currently have any need for this feature I'd 
 imagine that if I did I'd want the time in UTC, not locally


You may invoke the compiler with TZ= prepended. (Linux)
May 26 2017