On sexta-feira, 11 de agosto de 2017 02:01:11 PDT Mårten Nordheim wrote: > Replacement format > > >>> ----- > >>> > >>> The replacement options now have formatting features matching > >>> QString::arg. The current options (open to change) are: > >>> > >>> - `L` for localization (localize numbers, like in QString::arg) > >>> - `</>/=` for justification. Left, right and center justification > >>> > >>> - Followed by an optional padding character (excluding 1-9) > >>> - Followed by field-width > >>> - e.g. "==16" (pad using '=', centered, field-width 16), > >>> > >>> "<10" (left-justify using spaces, field-width 10), > >>> ">-3" (right-justify using '-', field-width 3) > > > > Is this inspired by any API? The one I can think of (printf) uses - for > > left justification and + for right justification. That would make just as > > much sense in using = for center. > > Yes: > http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0645r0.html > https://docs.python.org/3.6/library/string.html#format-specification-mini-la > nguage > > Although I notice now that they use '^' for centering, and not '='. I > should probably change to match that.
Python is a compelling reason. A proposed paper for C++2a isn't, since we can give feedback and have that change. I don't see anything about left/center/ right in the C# page, while the Rust page says they use < and > for left and right, but ^ for center. Has this ever been validated with people using RTL languages? The < and > symbols switch directions when used in RTL. For example: const char *fmt = "א {<10} ב" ; Can you tell from the pasted text which direction this will justify? I intentionally put the semi-colon on a separate line so you can't tell which side the tail end of the line is. It's even worse in your text editor -- go ahead and copy it to Qt Creator to see how it formats this! Or is that even a problem? Maybe it's even better this way? -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development