Enhanced file property stack

[PhelypeOleinik]

Brief outline of the enhancement

LaTeX2ε used to have one file-related stack (\@currnamestack) with:

• \@currname: the current file name (plus path, if any)
• \@currext: the current file extension
• \the\catcode`\@: the current catcode of @

Now since the 2020-02-02 release, there are quite a few more:

• \@expl@push@filename@@ to keep track of the same as \@currnamestack, but at the expl3 side (generic mode doesn't use it, so it can probably be transferred to the 2e kernel)
• \@expl@push@filename@@ also to keep track of \ExplSyntaxOn/Off
• \__hook_curr_name_push:n to keep track of the current default hook name
• \__filehook_file_push: to keep track of
  • \CurrentFilePathUsed
  • \CurrentFileUsed
  • \CurrentFilePath
  • \CurrentFile
• \@kernel@currpathstack to keep track of \@currpath

which clearly grew quite a lot and requires a lot of manual labour to set up and get working right.

LaTeX would benefit from an unified, easily extensible stack to keep track of file-related properties.

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This issue has been automatically marked as stale because it has not had recent activity.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity.