make-char-table
make-char-table is a built-in function in `C source code
'.
(make-char-table PURPOSE &optional INIT)
Return a newly created char-table, with purpose PURPOSE.
Each element is initialized to INIT, which defaults to nil.
PURPOSE should be a symbol. If it has a `char-table-extra-slots'
property, the property's value should be an integer between 0 and 10
that specifies how many extra slots the char-table has. Otherwise,
the char-table has no extra slot.