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diff --git a/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/README.md b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/README.md
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+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+=('\bsudo\b' fg=123,bold)
+```
+
+This will highlight "sudo" only as a complete word, i.e., "sudo cmd", but not
+"sudoedit"
+
+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]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting
+[perlretut]: http://perldoc.perl.org/perlretut.html
+[zshmisc-Conditional-Expressions]: http://zsh.sourceforge.net/Doc/Release/Conditional-Expressions.html#Conditional-Expressions
diff --git a/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/regexp-highlighter.zsh b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/regexp-highlighter.zsh
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+++ b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/regexp-highlighter.zsh
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+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2010-2016 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+
+# List of keyword and color pairs.
+typeset -gA ZSH_HIGHLIGHT_REGEXP
+
+# Whether the pattern highlighter should be called or not.
+_zsh_highlight_highlighter_regexp_predicate()
+{
+  _zsh_highlight_buffer_modified
+}
+
+# Pattern syntax highlighting function.
+_zsh_highlight_highlighter_regexp_paint()
+{
+  setopt localoptions extendedglob
+  local pattern
+  for pattern in ${(k)ZSH_HIGHLIGHT_REGEXP}; do
+    _zsh_highlight_regexp_highlighter_loop "$BUFFER" "$pattern"
+  done
+}
+
+_zsh_highlight_regexp_highlighter_loop()
+{
+  local buf="$1" pat="$2"
+  integer OFFSET=0
+  local MATCH; integer MBEGIN MEND
+  local -a match mbegin mend
+  while true; do
+    [[ "$buf" =~ "$pat" ]] || return;
+    region_highlight+=("$((MBEGIN - 1 + OFFSET)) $((MEND + OFFSET)) $ZSH_HIGHLIGHT_REGEXP[$pat], memo=zsh-syntax-highlighting")
+    buf="$buf[$(($MEND+1)),-1]"
+    OFFSET=$((MEND+OFFSET));
+  done
+}
diff --git a/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/complex.zsh b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/complex.zsh
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--- /dev/null
+++ b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/complex.zsh
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+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2016 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+ZSH_HIGHLIGHT_REGEXP+=('[0-9\+\-]+' 'fg=white,bold,bg=red')
+
+BUFFER='echo 1+9-3 7+2'
+
+expected_region_highlight=(
+  "6 10 fg=white,bold,bg=red"
+  "12 14 fg=white,bold,bg=red"
+)
diff --git a/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/subexpression.zsh b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/subexpression.zsh
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--- /dev/null
+++ b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/subexpression.zsh
@@ -0,0 +1,36 @@
+#!/usr/bin/env zsh
+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2018 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+BUFFER='ls foo'
+ZSH_HIGHLIGHT_REGEXP=('(^| )(ls|cd)($| )' 'fg=green')
+
+expected_region_highlight=(
+  '1 3 fg=green' # "ls "
+)
diff --git a/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/word-boundary.zsh b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/word-boundary.zsh
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index 0000000..1f4f666
--- /dev/null
+++ b/.config/shells/zsh/plugins/zsh-syntax-highlighting/highlighters/regexp/test-data/word-boundary.zsh
@@ -0,0 +1,42 @@
+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2016 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+if zmodload zsh/pcre 2>/dev/null; then
+  setopt RE_MATCH_PCRE
+
+  ZSH_HIGHLIGHT_REGEXP+=('\bsudo\b' 'fg=white,bold,bg=red')
+
+  BUFFER='sudo ls'
+
+  expected_region_highlight=(
+    "1 4 fg=white,bold,bg=red"
+  )
+else
+  skip_test='Test requires zsh/pcre'
+fi