Commit 35168 (52aeb9aaeb4799b760138a7c34b18ede4b47242a) in zsh changed
the parsing of case patterns, resulting in parse errors. Change the
syntax to be compatible with zsh both before and after that commit.
If one defines aliases like `++` the alias builtin tries to interprete these
as options so they have to be protected like this
alias -- ++=true
The same goes for a call to `alias` in order to expand the alias again.
This code is more lenient than bash. Examples:
$ x[y[]=
zsh: no matches found: x[y[]=
$ x[][]=
zsh: no matches found: x[][]=
The proper solution is to look inside the [...] and make sure that all
unescaped/unquoted square brackes are matched, but that is a heck of
a lot more complicated than this simple 8-character patch.
Zsh does not allow the variable name or the equals sign to be quoted or
escaped. The previous code incorrectly highlighted the following
examples as assignments:
$ 'x=y'
zsh: command not found: x=y
$ x\=y
zsh: command not found: x=y
$ "x"=y
zsh: command not found: x=y
$ \x=y
zsh: command not found: x=y
* Don't override user defined styles
* Better modularisation of highlighters
* Allow to define which highlighters are activated
* Allow to define the order in which they are defined
* Minor performance optimizations
* Fixed some variables leak
* Improve documentation
* Brackets highlighter: use ZSH_HIGHLIGHT_STYLES instead of a specific array
