Sha256: dcf4db91cf5e56043a21b8a99a7e02dc52e5b3399e1caa6e2e01a520fa312513
Contents?: true
Size: 1.29 KB
Versions: 10
Compression:
Stored size: 1.29 KB
Contents
# frozen_string_literal: true
class Language
class Atom
class Repeat < Atom
def initialize(parent: nil, minimum: 0, maximum: nil)
@parent = parent
@minimum = minimum
@maximum = maximum
end
def parse(parser)
return unless @parent
@minimum.times { match(parser) }
if @maximum.nil?
begin
loop { match(parser) }
rescue Parser::Interuption
end
else
begin
(@maximum - @minimum).times { match(parser) }
rescue Parser::Interuption
end
end
end
def to_s
minimum = @minimum.zero? ? "" : @minimum.to_s
maximum = @maximum.nil? ? "" : ", #{@maximum}"
parenthesis =
(minimum.empty? && maximum.empty?) ? "" : "(#{minimum}#{maximum})"
@parent ? "(#{@parent}).repeat#{parenthesis}" : "repeat#{parenthesis}"
end
private
def match(parser)
clone =
Parser.new(
root: self,
input: parser.input,
cursor: parser.cursor,
buffer: parser.buffer
)
@parent.parse(clone)
parser.cursor = clone.cursor
parser.buffer = clone.buffer
parser.output << clone.output
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems