[Python-ideas] Mashup the existing statement grammars to capture predicates

[Carl Smith]

Nah??

-- Carl Smith
carl.input at gmail.com

On 24 May 2018 at 19:24, Carl Smith <carl.input at gmail.com> wrote:

> This is another suggestion for new syntax for assigning a name to the value
> of the predicate in an if, elif or  while statement. It still uses `as` for
> its keyword, but with (more flexible) params instead of a direct
> assignment.
>
> It mashes up the if/while, def/class and for-in grammars, so it still looks
> like Python, and boils down to this:
>
>     if|elif|while <predicate> as (<params>): <suite>
>
> If the params contain one simple name (the required minimum), the value of
> the predicate is assigned to that name. In any other case, the value must
> be a sequence, which gets unpacked:
>
>     while input('$ ').split() as (command, *args):
>
>         if run(command, parse(args)) as (result): render(result)
>         else: sys.exit()
>
> -- Carl Smith
> carl.input at gmail.com
>
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