ForExpr

2011-04-20T13:22:40Z

89.248.248.152: /* Static constraints */

[[ForExpr]] is a [[nonkernel]] node which executes code for each element in a collection or other object implementing [[:Category:Message iterate/1|iterate/1]].

"for" (<var>optKeyPattern</var> "=>")? <var>valuePattern</var> "in" <var>collection</var> "{" <var>body</var> "}" ({<var>optBreakCatch</var> an EMatcher}: "catch" ''pattern'' "{" ''expr'' "}")?

{{XXX|We need to formalize the grammar definitions used in our spec}}

== Fields ==

* <var>optKeyPattern</var> :[[nullOk]]<nowiki>[</nowiki>[[Pattern]]]
* <var>valuePattern</var> :[[Pattern]]
* <var>collection</var> :[[nullOk]]<nowiki>[</nowiki>[[EExpr]]]
* <var>body</var> :[[EExpr]]
* <var>optBreakCatch</var> :[[nullOk]]<nowiki>[</nowiki>[[EMatcher]]]

== Expansion ==

{{XXX|Define the expansion of ForExpr}}

Kudos! What a neat way of thnkiing about it.

Erights - User contributions [en]

ForExpr