class Regex::Expression
Abstract class. The generalization of any valid regular (sub)expression.
Attributes
begin_anchor[RW]
@return [NilClass, Anchor]
end_anchor[RW]
@return [NilClass, Anchor]
Public Class Methods
new()
click to toggle source
Constructor
# File lib/regex/expression.rb, line 17 def initialize(); end
Public Instance Methods
atomic?()
click to toggle source
Abstract method. Return true iff the expression is atomic (= doesn't not have any child). @return [Boolean]
# File lib/regex/expression.rb, line 22 def atomic? abstract_method end
options(theParentOptions)
click to toggle source
Determine the matching options to apply to this object, given the options coming from the parent and options that are local to this object. Local options take precedence. @param theParentOptions [Hash] matching options. They are overridden by options with same name that are bound to this object.
# File lib/regex/expression.rb, line 31 def options(theParentOptions) resulting_options = theParentOptions.merge(@local_options) return resulting_options end
to_str()
click to toggle source
Template method. @return [String] text representation of the expression.
# File lib/regex/expression.rb, line 38 def to_str result = +'' result << prefix result << text_repr result << suffix return result end
Protected Instance Methods
prefix()
click to toggle source
# File lib/regex/expression.rb, line 49 def prefix begin_anchor ? begin_anchor.to_str : '' end
suffix()
click to toggle source
# File lib/regex/expression.rb, line 53 def suffix end_anchor ? end_anchor.to_str : '' end