class Chronic::Separator

def self.scan(tokens, options)
  tokens.each do |token|
    if t = scan_for_commas(token) then token.tag(t); next end
    if t = scan_for_slash_or_dash(token) then token.tag(t); next end
    if t = scan_for_at(token) then token.tag(t); next end
    if t = scan_for_in(token) then token.tag(t); next end
    if t = scan_for_on(token) then token.tag(t); next end
  end
end

def self.scan_for_at(token)
  scan_for token, SeparatorAt, { /^(at|@)$/ => :at }
end

def self.scan_for_commas(token)
  scan_for token, SeparatorComma, { /^,$/ => :comma }
end

def self.scan_for_in(token)
  scan_for token, SeparatorIn, { /^in$/ => :in }
end

def self.scan_for_on(token)
  scan_for token, SeparatorOn, { /^on$/ => :on }
end

def self.scan_for_slash_or_dash(token)
  scan_for token, SeparatorSlashOrDash,
  {
    /^-$/ => :dash,
    /^\/$/ => :slash
  }
end

def to_s
  'separator'
end