Hi Pierre,
On Wed, May 13, 2020 at 7:34 AM Pierre Dupond <76nem...@gmx.ch> wrote:
>
> \RequirePackage{expl3}
> \ProvidesExplPackage {test} {2020-05-12} {1.0}
> {to test some commands}
>
> \RequirePackage{fontspec}
> \RequirePackage{unicode-math}
> \tl_const:Nn \c__test_MathFont_tl {Asana-Math}
> \tl_const:Nn \c__test_MathFontSpec_tl {Extension=.otf,}
>
> \exp_args:Noo\setmathfont{\tl_use:N \c__test_MathFont_tl} { [ \tl_use:N
> \c__test_MathFontSpec_tl ] }
\tl_use:N doesn't fully expand with one expansion step, so you have to
use e or x (f could also be used, but that might consume a space at the
head of the token list).
With \exp_args:No \cmd { [ \tl_use:N \c_some_tl ] }, the \expandafter
will hit the [, and do nothing at all. x or e expansion will also do the
trick here:
\exp_args:Nxx \setmathfont
{ \tl_use:N \c__test_MathFont_tl }
{ [ \tl_use:N \c__test_MathFontSpec_tl ] }
or
\use:x
{
\setmathfont { \tl_use:N \c__test_MathFont_tl }
[ \tl_use:N \c__test_MathFontSpec_tl ]
}
Phelype
