[jira] Updated: (BOO-137) optimize for item in array construct

     [ http://jira.codehaus.org/browse/BOO-137?page=all ]

Cameron Kenneth Knight updated BOO-137:
---------------------------------------

    Attachment: OptimizeIterationStatements.cs

This optimizes "for i in array" as well as "for i in range()"

It goes into the pipeline "ResolveExpressions" after 
ProcessMethodBodiesWithDuckTyping.

> optimize for item in array construct
> ------------------------------------
>
>          Key: BOO-137
>          URL: http://jira.codehaus.org/browse/BOO-137
>      Project: Boo
>         Type: Improvement
>   Components: Compiler
>     Reporter: Rodrigo B. de Oliveira
>  Attachments: OptimizeIterationStatements.cs
>
>
> The current progress in the generators front required deoptimizing the 
> handling of "for item in array" constructs.
> for item in array:
>     pass
> should expand to:
> i = 0
> while i < len(array):
>     item = array[i]
>     ++i
> instead of today's:
> iterator = array.GetEnumerator()
> while iterator.MoveNext():
>      item = iterator.Current

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