Why does not the hard hyphen “‑” work in lualatex with the package luainputenc with option utf8? With hard hyphen, I mean a hyphen, which prohibits the line to break directly after it.
MWE:
\documentclass{article}
\usepackage[utf8]{luainputenc}
\begin{document}
Åsa‑Nisse
\end{document}
luainputenc doesn't define a conversion for U+2011 (NON-BREAKING HYPHEN); you can do it yourself:
\documentclass{article}
\usepackage[utf8]{luainputenc}
\DeclareUnicodeCharacter{2011}{\mbox{-}}
\begin{document}
Åsa‑Nisse
\end{document}
\mbox in those few instances where you don't want a break to occur with names such as "Åsa-Nisse".
Use of luainputenc is deprecated. The documentation of luainputenc itself says:
Input encoding management for LuaTEX, needed only for compatibility with old documents. For new documents, using UTF-8 encoding and Unicode fonts is strongly recommended. You’ve been warned!
UTF-8 support works out of the box with lualatex and fontspec if your files are utf8 encoded.
\documentclass{article}
\usepackage{fontspec}
\begin{document}
Åsa‑Nisse
\end{document}
Now to your question:
use the package extdash: \usepackage[shortcuts]{extdash}. This should be the last package you include, even after hyperref and bookmark.
You can then use the \=/ command to indicate a non-breakable hyphen, the \== to indicate a non-breakable en-dash (--):
\documentclass{article}
\usepackage{fontspec}
% lots of packages here
% these are usually the last packages to load:
\usepackage[unicode]{hyperref}
\usepackage{bookmark}
% very last package:
\usepackage[shortcuts]{extdash}
\begin{document}
Åsa\=/Nisse
Maxwell\==Boltzmann\=/Deviation
$x$\=/axis
\end{document}
If a word is a compound with hyphen, LaTeX by default only breaks at this hyphen, not at normally breakable places inside the words. extdash also deals with this problem.
Of you use the commands \-/ for a hyphen or \-- for an en-dash LaTeX is also allowed to break inside of the words.
