[Python-Dev] odd interpreter feature (original) (raw)

Sjoerd Mullender sjoerd@acm.org
Thu, 08 May 2003 10:11:15 +0200

Isn't it the case that you should only get a secondary prompt after the comment line if the comment line itself had a secondary prompt?

On Wed, May 7 2003 Skip Montanaro wrote:

Guido> Please do. The indentation level should be easily available, Guido> since it is computed by the tokenizer. Alas, it's more complicated than just the indentation level of the current line. I need to know if the previous line was indented, which I don't think the tokenizer knows (at least examining *tok in gdb under various conditions suggests it doesn't). I see the following possible cases (there are perhaps more, but I think they are similar enough to ignore here): >>> if x == y: ... # hello ... pass ... >>> if x == y: ... x = 1 ... # hello ... pass ... >>> x = 1 >>> # hello ... >>> Only the last case should display the primary prompt after the comment is entered. The other two correctly display the secondary prompt. It's distinguishing the second and third cases in the tokenizer without help from the parser that's the challenge. Oh well. Perhaps it's a wart best left alone.

-- Sjoerd Mullender <sjoerd@acm.org>