TeX, LaTeX and Friends

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daleif

11:36 AM

Say I want to make my own special \if_foo:nTF macro for my class/package, is there a naming convention here as well (as with variables and macros)?

David Carlisle

@daleif should follow the normal naming scheme for commands just using TF for nn by convention, so \yourmodule_if_something:nTF

daleif

@DavidCarlisle was also what I thought

Ulrike Fischer

@daleif do you use \prg_new_conditionaletc to create it?

daleif

And I'm getting it is ok for it to have side effects (here I want to check that a key exists in a prop and that it is not blank. If so save the value in \foo to be used insiden the T part.

@UlrikeFischer yes, was looking in one of the l3X.dtx how things were defined and has forgotten about the \prg_new_ macros.

David Carlisle

@daleif yes I guess so

daleif

11:46 AM

@DavidCarlisle I just find it wasteful to first do \prop_get into \foo at the test, and then again in the T part where I'm going to use it.

Does seem to work

David Carlisle

@daleif although TF examples that set don't usually get called ...if... I think. eg \file_get_mdfive_hash:nNTF where the TF tells you there is conditional behaviour and get tells you theer is an assignment, you don't need if_ in the name

1 hour later…

daleif

1:02 PM

Do we have equivalents for \two@digits and \hspace(*) in expl3

Skillmon

1:29 PM

@daleif None for \two@digits afaik (except for coding it yourself), but for textual usage I'd probably use siunitx anyways. \hspace isn't exactly covered either, but there is \skip_horizontal:N, which is the same as \hskip (and \skip_horizontal:n which evaluates a skip expression).

daleif

1:57 PM

@Skillmon I don't want to load siunitx just to typeset 03.08.2024 given \the\year, \the\month and \the\day