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|
module Chronic
class Sign < Tag
# Scan an Array of Token objects and apply any necessary Sign
# tags to each token.
#
# tokens - An Array of tokens to scan.
# options - The Hash of options specified in Chronic::parse.
#
# Returns an Array of tokens.
def self.scan(tokens, options)
tokens.each do |token|
if t = scan_for_plus(token) then token.tag(t); next end
if t = scan_for_minus(token) then token.tag(t); next end
end
end
# token - The Token object we want to scan.
#
# Returns a new SignPlus object.
def self.scan_for_plus(token)
scan_for token, SignPlus, { /^\+$/ => :plus }
end
# token - The Token object we want to scan.
#
# Returns a new SignMinus object.
def self.scan_for_minus(token)
scan_for token, SignMinus, { /^-$/ => :minus }
end
def to_s
'sign'
end
end
class SignPlus < Sign #:nodoc:
def to_s
super << '-plus'
end
end
class SignMinus < Sign #:nodoc:
def to_s
super << '-minus'
end
end
end
|
