我似乎无法弄清楚如何将 'when' 关键字添加到 BOO ，它应该表现为 '如果'。 我想我可以制定一个方法，但是我无法像使用 if 那样移动 when 。 任何指示将不胜感激。
-标记
I cannot seem to figure out how I can add the 'when' keyword to BOO which should behave as an 'if'. I figure I could make a method, but then I cannot move the when around like I can with if. Any pointers would be appreciated.
-Mark
这将满足您的要求：
import Boo.Lang.Compiler.Ast import Boo.Lang.Compiler.MetaProgramming macro when: return [| if $(when.Arguments[0]): $(when.Block) |] x = 1 when x == 1: print "x equals one" when x == 2: print "x equals two"
顺便说一句，请随时（也）在 Boo 邮件列表上提问，以便更快地获得（更多）答案；）
http://groups.google.com/group/boolang/
This would do what you want:
Btw, feel free to (also) ask on the Boo mailing-list to get (more) answers quicker ;)
这将是宏的工作。 从您链接到的页面来看，Boo 似乎有语法宏。
顺便说一句，为什么您需要现有功能的精确副本？
This would be a job for a macro. From the page you linked to, it seems that Boo has syntactic macros.
As an aside note, why do you need an exact duplicate of an existing functionality?
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这将满足您的要求：
顺便说一句，请随时（也）在 Boo 邮件列表上提问，以便更快地获得（更多）答案；）
http://groups.google.com/group/boolang/
This would do what you want:
Btw, feel free to (also) ask on the Boo mailing-list to get (more) answers quicker ;)
http://groups.google.com/group/boolang/
这将是宏的工作。 从您链接到的页面来看，Boo 似乎有语法宏。
顺便说一句，为什么您需要现有功能的精确副本？
This would be a job for a macro. From the page you linked to, it seems that Boo has syntactic macros.
As an aside note, why do you need an exact duplicate of an existing functionality?