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Handle zero and negative SequenceSet min/max counts #742

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Handle zero and negative SequenceSet min/max counts #742

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5 changes: 5 additions & 0 deletions lib/net/imap/sequence_set.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -788,6 +788,9 @@ def disjoint?(other)
# Related: #min, #minmax, #slice
def max(count = nil, star: :*)
if count
count = Integer(count.to_int)
raise ArgumentError, 'negative count' if count < 0
return remain_frozen_empty if count == 0
if cardinality <= count
frozen? ? self : dup
else
Expand All @@ -812,6 +815,8 @@ def max(count = nil, star: :*)
# Related: #max, #minmax, #slice
def min(count = nil, star: :*)
if count
count = Integer(count.to_int)
raise ArgumentError, 'negative count' if count < 0
slice(0...count) || remain_frozen_empty
elsif (val = min_num)
val != STAR_INT ? val : star
Expand Down