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# frozen_string_literal: true
module TTFunk
# Minimum aggregate. Its value can only become lower.
class Min < Aggregate
# Value
#
# @return [Comparable, nil]
attr_reader :value
# @param init_value [Comparable] initial value
def initialize(init_value = nil)
super()
@value = init_value
end
# Push a value. It will become the new value if it's lower than the current
# value (or if there was no value).
#
# @param new_value [Comparable]
# @return [void]
def <<(new_value)
new_value = coerce(new_value)
if value.nil? || new_value < value
@value = new_value
end
end
# Get the stored value or default.
#
# @param default [any]
# @return [any]
def value_or(default)
return default if value.nil?
value
end
end
end
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