[Python-3000] PEP 30XZ: Simplified Parsing (original) (raw)

Guido van Rossum guido at python.org
Mon Apr 30 19:30:28 CEST 2007

On 4/30/07, Giovanni Bajo <rasky at develer.com> wrote:

I was in favor of one of the alternatives that were proposed here:

Was? Are you no longer in favor of it? (Then I should shut up. :-)

line continuation through indentation:

a = 123 * (12 + 4) / 8 assert True, "No goofy paren" + ", dude" ... and don't tell me that you need a character there because using just indentation is hard to read :) Even if you don't want to champion this solution in your PEP, you should at least list it among the alternatives.

Then please add my -1 to it: I don't think this is feasible. It would require allowing matching INDENT and DEDENT tokens anywhere in the grammar; or you would have to limit where in the grammar you allow the indent to occur (e.g. after '*' but not before it; after the ',' but not before it). It seems a really big departure from the current Python parsing methodology.

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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