named-readtable

This function looks up a readtable by name. name must be a symbol, but it is coerced to a keyword (so readtables are named by keywords). setf may be used to associate a name to a readtable. The association can be broken by setting to nil. Naming readtables is particularly useful for editors (see the description of Emacs file mode line support for named readtables in eli.htm).

Here is an example:

user(2): (setq my-rt (copy-readtable))
#<readtable @ #x4d4fa2>
user(3): (setf (named-readtable :mytable) my-rt)
#<readtable @ #x4d4fa2>
user(4): (named-readtable :mytable)
#<readtable @ #x4d4fa2>
user(5): (setf (named-readtable :mytable) nil)
nil
user(6): (named-readtable :mytable nil)
nil
user(7): (named-readtable :mytable)
Error: There is no readtable named :mytable.
[1] user(8): 

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Created 2019.8.20.