[swift-evolution] About the PermutationGenerator
Susan Cheng
susan.doggie at gmail.com
Thu Dec 31 06:01:41 CST 2015
As I know SequenceType should have behaved as immutable structure and it
provides method to get a mutable GeneratorType which generates value from
start of sequence.
But the PermutationGenerator break this rule, every time it changes it's
state, it cannot get the generator with the start of sequence.
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