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D.gnu - Output of std.format for float difference between DMD and GDC

reply BoraxMan <rotflol2 hotmail.com> writes:
I have noted that DMD and GDC provide a different output to the 
following line of code.

writeln(format("$%-12,3.2f",66543.22));

DMD outputs

$66,543.22

GDC outputs

$66,543.22 ,

As you can see, GDC puts a superflous comma at the end.  The goal 
of this line is to convert a float to a monetary representation, 
therefore DMD is what I want and GDC not.

The question is, is the line of code in error?  If not, does this 
mean there is a bug with GDC's libphobos?

Regards,
Dennis
Dec 04 2019
parent reply BoraxMan <rotflol2 hotmail.com> writes:
On Wednesday, 4 December 2019 at 09:41:58 UTC, BoraxMan wrote:

 I have noted that DMD and GDC provide a different output to the 
 following line of code.

 writeln(format("$%-12,3.2f",66543.22));

 DMD outputs

 $66,543.22

 GDC outputs

 $66,543.22 ,

 As you can see, GDC puts a superflous comma at the end.  The 
 goal of this line is to convert a float to a monetary 
 representation, therefore DMD is what I want and GDC not.

 The question is, is the line of code in error?  If not, does 
 this mean there is a bug with GDC's libphobos?

 Regards,
 Dennis


I figured it out, its my lack of experience in D.

format("$%-*,3.2f",x.dig,x);

where x is the floating point value works as expected.
Dec 04 2019
parent Iain Buclaw <ibuclaw gdcproject.org> writes:
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, 4 December 2019 12:16, BoraxMan via D.gnu <d.gnu puremagic.com>
wrote:


 On Wednesday, 4 December 2019 at 09:41:58 UTC, BoraxMan wrote:


 I have noted that DMD and GDC provide a different output to the
 following line of code.
 writeln(format("$%-12,3.2f",66543.22));
 DMD outputs
 $66,543.22
 GDC outputs
 $66,543.22 ,
 As you can see, GDC puts a superflous comma at the end. The
 goal of this line is to convert a float to a monetary
 representation, therefore DMD is what I want and GDC not.
 The question is, is the line of code in error? If not, does
 this mean there is a bug with GDC's libphobos?
 Regards,
 Dennis


 I figured it out, its my lack of experience in D.

 format("$%-*,3.2f",x.dig,x);

 where x is the floating point value works as expected.



It's a phobos library bug.

https://issues.dlang.org/show_bug.cgi?id=20069


--
Iain
Dec 07 2019