[isabelle-dev] [isabelle] print_statement does not quote variables with reserved names

Makarius makarius at sketis.net
Fri Oct 28 17:03:37 CEST 2016

On 28/10/16 13:52, Lawrence Paulson wrote:
> I hope these won't be deprecated. Even though they are a bit longer, they are logical and easy to remember (due to the parallels with fix/assume/show).
> Larry
>> On 27 Oct 2016, at 22:20, Makarius <makarius at sketis.net> wrote:
>> Note that the long form with fixes/assumes/shows has become a bit
>> old-fashioned, although there is nothing wrong with it apart from being
>> too long for short statements.
>> The new eigen-context notation "theorem B if A for x" often works
>> better, but there no print command for that yet. In fact, I would like
>> to make the "for x" form standard for almost all output, e.g. plain
>> 'thm'. But that is a different story for a different release.

fixes/assumes/show is not going to disappear; it is required as dual
form of fixes/assumes/obtains, which is not covered by the new
eigen-context notation.

BTW, there is strictly speaking no need to use fix/assume/show, since
show if/for is already possible, although relatively rarely used.


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