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# frozen_string_literal: true
# Boundary is a boundary used in an interval.
# It can either be above all versions (infinity),
# below all versions (negative infinity), or any version.
module SemverDialects
class Boundary
include Comparable
attr_accessor :semver
def initialize(semver)
@semver = semver
end
def to_s
@semver.to_s
end
def <=>(other)
return nil unless other.is_a?(Boundary)
return -1 if other.instance_of?(AboveAll)
return 1 if other.instance_of?(BelowAll)
semver <=> other.semver
end
def is_initial_version?
@semver.is_zero?
end
end
# BelowAll represents a boundary below all possible versions.
# When used as the lower boundary of an interval, any version
# that is smaller than the upper boundary is in the interval.
class BelowAll < Boundary
def initialize; end
def to_s
'-inf'
end
def is_initial_version?
false
end
def <=>(other)
return 0 if other.instance_of?(BelowAll)
-1 if other.is_a?(Boundary)
end
end
# AboveAll represents a boundary above all possible versions.
# When used as the upper boundary of an interval, any version
# that is greater than the lower boundary is in the interval.
class AboveAll < Boundary
def initialize; end
def to_s
'+inf'
end
def is_initial_version?
false
end
def <=>(other)
return 0 if other.instance_of?(AboveAll)
1 if other.is_a?(Boundary)
end
end
end
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