[Python-ideas] Yet Another Switch-Case Syntax Proposal

[Andrew Barnert]

On Apr 17, 2014, at 14:53, Oleg Broytman <phd at phdru.name> wrote:

> While I don't think it's a good addition for Python...
> 
> On Thu, Apr 17, 2014 at 02:41:56PM -0700, Andrew Barnert <abarnert at yahoo.com.dmarc.invalid> wrote:
>> On Apr 17, 2014, at 12:14, "Lucas Malor" <7vsfeu4pxg at snkmail.com> wrote:
>> 
>>> switch_stmt ::=  "switch" switch_expr "case" case_expr ":" suite
>>>   ("case" | "elcase" case_expr ":" suite)*
>>>   ["else" ":" suite]
>>> switch_expr ::= expression
>>> case_expr ::= expression_list
>> 
>>> - if case_expr is a tuple, the case suite will be executed if switch_expr is a member of the tuple
>> 
>> So there's no way to switch on a tuple?
> 
>   A tuple can be a member of a bigger tuple:
> 
>>>> (1, 'b') in ((1, 'a'), (1, 'b'), (1, 'a', 'b'))
> True

Well, yeah, but if you want to match (1, 'b') you'd have to write case ((1, 'b'),). Which is bad for static cases, and even worse for dynamic ones.