[asdf-devel] standard io syntax woes

Raymond Toy toy.raymond at gmail.com
Thu Feb 21 21:22:35 UTC 2013

>>>>> "Fare" == Far  <Far> writes:

    Fare> On Thu, Feb 21, 2013 at 2:08 PM, Raymond Toy <toy.raymond at gmail.com> wrote:
    >>>>>>> "Fare" == Far  <Far> writes:
    Fare> For the record, checking on my machine today:
    Fare> Implementations that make the standard readtable read-only:
    Fare> allegro sbcl
    Fare> Implementations that don't:
    Fare> abcl ccl clisp cmucl ecl lispworks scl
    >> FWIW, on cmucl, *readtable* is a copy of the standard readtable.  The
    >> standard readtable isn't writable unless you go out of your way to
    >> access the magic standard readtable.
    >> So, it's perfectly valid to modify *readtable*.
    >> Or are you suggesting that *readtable* should be eq to the
    >> magic standard readtable?
    >> The same holds for *print-pprint-dispatch*---it's a copy of the
    >> standard dispatch table, not eq to it.
    Fare> I am suggesting indeed that,
    Fare> as per the CLHS for WITH-STANDARD-IO-SYNTAX and
    Fare> the CLHS Glossary for standard reatable,
    Fare> W-S-IO-S should bind *READTABLE* to the standard readtable,
    Fare> and similarly for *PRINT-PPRINT-DISPATCH*.
    Fare> And for the sake of sanity, said standard tables better be readonly.

Ah, I misspoke.  w-s-io-s does indeed bind *readtable* to the magic
standard table.  *print-pprint-dispatch* gets a copy of the standard

I will try to update this and make them not writable in time for the
next snapshot.  Maybe.


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