Specs for Enumerator::Lazy propagating source yield arity through stages - #1389
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Specs for Enumerator::Lazy propagating source yield arity through stages#1389sampokuokkanen wants to merge 1 commit into
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A lazy stage that passes its source values through unchanged keeps the arity they were yielded with, so a block belonging to a later stage still receives them the way a block on the first stage would. In CRuby this is the LAZY_MEMO_PACKED bit traveling along the chain; stages that replace the value with a block result clear it. Covers take, drop, select, reject, take_while, drop_while, grep and grep_v through shared examples, plus the zero-argument yield (which becomes a single nil). uniq and compact drop values, so they get their own examples. Also adds the existing :enumerable_value_packing examples to grep, the one Lazy method they did not already cover.
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A lazy stage that passes its source values through unchanged keeps the arity they were yielded with, so a block belonging to a later stage still receives them the way a block on the first stage would. In CRuby this is the LAZY_MEMO_PACKED bit traveling along the chain; stages that replace the value with a block result clear it.
Covers take, drop, select, reject, take_while, drop_while, grep and grep_v through shared examples, plus the zero-argument yield (which becomes a single
nil). uniq and compact drop values, so they get their own examples.Also adds the existing :enumerable_value_packing examples to grep, the one Lazy method they did not already cover.