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diff --git a/.config/zsh/plugins/zsh-syntax-highlighting/docs/highlighters/regexp.md b/.config/zsh/plugins/zsh-syntax-highlighting/docs/highlighters/regexp.md new file mode 100644 index 0000000..b1bed91 --- /dev/null +++ b/.config/zsh/plugins/zsh-syntax-highlighting/docs/highlighters/regexp.md @@ -0,0 +1,65 @@ +zsh-syntax-highlighting / highlighters / regexp +------------------------------------------------ + +This is the `regexp` highlighter, that highlights user-defined regular +expressions. It's similar to the `pattern` highlighter, but allows more complex +patterns. + +### How to tweak it + +To use this highlighter, associate regular expressions with styles in the +`ZSH_HIGHLIGHT_REGEXP` associative array, for example in `~/.zshrc`: + +```zsh +typeset -A ZSH_HIGHLIGHT_REGEXP +ZSH_HIGHLIGHT_REGEXP+=('^rm .*' fg=red,bold) +``` + +This will highlight lines that start with a call to the `rm` command. + +The regular expressions flavour used is [PCRE][pcresyntax] when the +`RE_MATCH_PCRE` option is set and POSIX Extended Regular Expressions (ERE), +as implemented by the platform's C library, otherwise. For details on the +latter, see [the `zsh/regex` module's documentation][MAN_ZSH_REGEX] and the +`regcomp(3)` and `re_format(7)` manual pages on your system. + +For instance, to highlight `sudo` only as a complete word, i.e., `sudo cmd`, +but not `sudoedit`, one might use: + +* When the `RE_MATCH_PCRE` is set: + + ```zsh + typeset -A ZSH_HIGHLIGHT_REGEXP + ZSH_HIGHLIGHT_REGEXP+=('\bsudo\b' fg=123,bold) + ``` + +* When the `RE_MATCH_PCRE` is unset, on platforms with GNU `libc` (e.g., many GNU/Linux distributions): + + ```zsh + typeset -A ZSH_HIGHLIGHT_REGEXP + ZSH_HIGHLIGHT_REGEXP+=('\<sudo\>' fg=123,bold) + ``` + +* When the `RE_MATCH_PCRE` is unset, on BSD-based platforms (e.g., macOS): + + ```zsh + typeset -A ZSH_HIGHLIGHT_REGEXP + ZSH_HIGHLIGHT_REGEXP+=('[[:<:]]sudo[[:>:]]' fg=123,bold) + ``` + +Note, however, that PCRE and POSIX ERE have a large common subset: +for instance, the regular expressions `[abc]`, `a*`, and `(a|b)` have the same +meaning in both flavours. + +The syntax for values is the same as the syntax of "types of highlighting" of +the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)` +manual page][zshzle-Character-Highlighting]. + +See also: [regular expressions tutorial][perlretut], zsh regexp operator `=~` +in [the `zshmisc(1)` manual page][zshmisc-Conditional-Expressions] + +[zshzle-Character-Highlighting]: https://zsh.sourceforge.io/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting +[perlretut]: http://perldoc.perl.org/perlretut.html +[zshmisc-Conditional-Expressions]: https://zsh.sourceforge.io/Doc/Release/Conditional-Expressions.html#Conditional-Expressions +[MAN_ZSH_REGEX]: https://zsh.sourceforge.io/Doc/Release/Zsh-Modules.html#The-zsh_002fregex-Module +[pcresyntax]: https://www.pcre.org/original/doc/html/pcresyntax.html |