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# This class provides the ability to define a range using numbers or regular expressions
# and when provided with an array, will return a normal ruby Range object based on the matching
# elements in the array. NOTE this class is has the same attributes as Range and is identical
# when serialized (except for the class declaration obviously), but it is NOT a substitute for
# Range (only a facade).
class RegexpRange
class PatternMatchError < StandardError
end
attr_reader :begin, :end, :excl
def initialize(range_start, range_end, exclusive = false)
@begin = range_start
@end = range_end
@excl = exclusive
end
def to_range(lines)
start_line_number = @begin
if start_line_number.is_a?(Regexp)
lines.each_with_index do |line, i|
if line.match(start_line_number)
start_line_number = i
break
end
end
if start_line_number.is_a?(Regexp)
fail PatternMatchError, "begin pattern #{start_line_number.inspect} not found"
end
end
end_line_number = @end
if end_line_number.is_a?(Regexp)
start_scan_line = start_line_number + 1
lines[start_scan_line..-1].each_with_index do |line, i|
# puts "##{start_scan_line + i}: #{line}"
if line.match(end_line_number)
end_line_number = start_scan_line + i
break
end
end
if end_line_number.is_a?(Regexp)
fail PatternMatchError,
"end pattern #{end_line_number.inspect} not found on or after line #{start_scan_line}"
end
end
Range.new(start_line_number, end_line_number, @excl)
end
# `other` is equal to self if it is a RegexpRange with the same state.
def ==(other)
other.is_a?(RegexpRange) && other.state == state
end
alias_method :eql?, :==
protected
# Used by other RegexpRange objects, as well as Hashes, during equality checks:
def state
[@begin, @end, @excl]
end
delegate :hash, :to => :state # Used for Hash key lookup
end
Version data entries
41 entries across 41 versions & 1 rubygems