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# Ruby syntax highlighting for Nano.
# Author:  Josef 'Jupp' Schugt, jupp(a)rubyforge.org
# License: GPL 2  or later
# Version: 0.1 of 2004-02-20
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# Automatically use for '.rb' files
syntax "ruby" ".*\.*rb$"

# General
color white ".+"

# Operators
color brightyellow "::|\*\*|!|~|\*|/|%|\+|-|&|<<|>>|\|\^|>|>=|<|<="
color brightyellow "<=>|\||\|\||!=|=~|!~|&&|\+=|-=|=|\.\.|\.\.\."
color brightyellow "\<not\>|\<and\>|\<or\>"

# Keywords
color brightyellow "\<(BEGIN|END|alias|and|begin|break|case)\>"
color brightyellow "\<(class|def|defined|do|else|elsif|end)\>"
color brightyellow "\<(ensure|for|if|in|module|next|not|or|redo)\>"
color brightyellow "\<(rescue|retry|return|self|super|then|undef)\>"
color brightyellow "\<(unless|until|when|while|yield)\>"

# false, nil, true
color magenta "\<(false|nil|true)\>"

# Above must not match 'nil?'
color white "\<nil\?"

# external stuff
color brightgreen "\<(load|require|%q|%!|%Q|%r|%x)"

# Iterators
color brightgreen "\|\w*\|"

# Constants
color yellow "\<[A-Z]\w*\>"

# Symbols
color yellow "([ \t]|^):(@|@@|\$)?\w+\>"

# Strings
color green "\"(\\.|[^\\\"])*\"|'(\\.|[^\\'])*'"

# Backticks
color green "`(\\.|[^\\\"])*`"

# Regular expressions
color green "/(\\.|[^\\/])*/[imox]*"

# Escapes
color red "\\[0-7][0-7][0-7]|\\x[0-9a-fA-F][0-9a-fA-F]"
color red "\\[abefnrs]"
color red "(\\c|\\C-|\\M-|\\M-\\C-)."

# Expression substitution
color red "#{[^}]*}|#(@|@@|\$)\w+"

# Simple comments
color cyan         "#([^{].*)?$"

# Shebang
color brightcyan   "^#!.*"

# Multiline comments
color cyan         start="^=begin" end="^=end"