Internally distinguish between placeholders and atom forms at the :type level

mkremins / flense

Edit trees, not text

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Internally distinguish between placeholders and atom forms at the :type level #65

Open mkremins opened 8 years ago

mkremins commented 8 years ago

At the moment, a "placeholder" is really just a special-cased :atom whose :text happens to be "...". We should probably establish a separate :type for placeholders (maybe :placeholder, maybe :hole) to clarify the distinction.