Sha256: 9c64222ea793c1f423048a93414e13b1612d20efd1da1767a1af66664655bfbe
Contents?: true
Size: 939 Bytes
Versions: 22
Compression:
Stored size: 939 Bytes
Contents
module Earthquake
module IdVar
attr_accessor :id_var
def id2var(id)
id_var.id2var(id)
end
def var2id(var)
id_var.var2id(var)
end
class Gen
def initialize(vars = ('aa'..'zz').to_a, prefix = '$')
if not vars.kind_of?(Array)
raise ArgumentError, 'vars should be an Array'
elsif vars.empty?
raise ArgumentError, 'vars should not be empty'
end
@vars = vars.map { |var| prefix + var }
@table = {}
@rtable = {}
@prefix = prefix
end
def var2id(var)
@table[var]
end
def id2var(id)
@rtable[id] || self.next(id)
end
def next(id)
var = @vars.shift
@vars.push var
@rtable.delete(@table[var])
@table[var] = id
@rtable[id] = var
var
end
end
end
extend IdVar
init do
self.id_var ||= IdVar::Gen.new
end
end
Version data entries
22 entries across 22 versions & 1 rubygems