Commit 861f8bd

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mruby-enumerator: add Enumerator#size

If the original object responds to `size` method, `Enumerator#size` calls that method, otherwise return `nil`. CRuby returns the exact size for more cases (e.g. Enumerable::Lazy#size), but mruby has more limitations.

1 file changed

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mrbgems/mruby-enumerator/mrblib

Lines changed: 8 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -238,6 +238,14 @@ def inspect`
`238`	`238`	`end`
`239`	`239`	`end`
`240`	`240`
	`241`	`+def size`
	`242`	`+if @size`
	`243`	`+@size`
	`244`	`+elsif @obj.respond_to?(:size)`
	`245`	`+@obj.size`
	`246`	`+end`
	`247`	`+end`
	`248`	`+`
`241`	`249`	`##`
`242`	`250`	`# call-seq:`
`243`	`251`	`# enum.each { \|elm\| block } -> obj`