Define a new named readtable, whose name is given by the symbol NAME.
Or, if a readtable is already registered under that name, redefine
that one.
The readtable can be populated using the following OPTIONS:
- ‘(:MERGE READTABLE-DESIGNATORS+)‘
Merge the macro character definitions from the readtables
designated into the new readtable being defined as per
MERGE-READTABLES-INTO. The copied options are
:DISPATCH-MACRO-CHAR, :MACRO-CHAR and :SYNTAX-FROM, but not
READTABLE-CASE.
If no :MERGE clause is given, an empty readtable is used. See
MAKE-READTABLE.
- ‘(:FUSE READTABLE-DESIGNATORS+)‘
Like :MERGE except:
Error conditions of type READER-MACRO-CONFLICT that are signaled
during the merge operation will be silently _continued_. It
follows that reader macros in earlier entries will be
overwritten by later ones. For backward compatibility, :FUZE is
accepted as an alias of :FUSE.
- ‘(:DISPATCH-MACRO-CHAR MACRO-CHAR SUB-CHAR FUNCTION)‘
Define a new sub character ‘SUB-CHAR‘ for the dispatching macro
character ‘MACRO-CHAR‘, per SET-DISPATCH-MACRO-CHARACTER. You
probably have to define ‘MACRO-CHAR‘ as a dispatching macro
character by the following option first.
- ‘(:MACRO-CHAR MACRO-CHAR FUNCTION [NON-TERMINATING-P])‘
Define a new macro character in the readtable, per
SET-MACRO-CHARACTER. If ‘FUNCTION‘ is the keyword :DISPATCH,
‘MACRO-CHAR‘ is made a dispatching macro character, per
MAKE-DISPATCH-MACRO-CHARACTER.
- ‘(:SYNTAX-FROM FROM-READTABLE-DESIGNATOR FROM-CHAR TO-CHAR)‘
Set the character syntax of TO-CHAR in the readtable being
defined to the same syntax as FROM-CHAR as per
SET-SYNTAX-FROM-CHAR.
- ‘(:CASE CASE-MODE)‘
Defines the _case sensitivity mode_ of the resulting readtable.
Any number of option clauses may appear. The options are grouped by
their type, but in each group the order the options appeared
textually is preserved. The following groups exist and are executed
in the following order: :MERGE and :FUSE (one
group), :CASE, :MACRO-CHAR and :DISPATCH-MACRO-CHAR (one group),
finally :SYNTAX-FROM.
Notes:
The readtable is defined at load-time. If you want to have it
available at compilation time – say to use its reader-macros in the
same file as its definition – you have to wrap the DEFREADTABLE
form in an explicit EVAL-WHEN.
On redefinition, the target readtable is made empty first before
it’s refilled according to the clauses.
NIL, :STANDARD, :COMMON-LISP, :MODERN, and :CURRENT are
preregistered readtable names.
- Package
editor-hints.named-readtables
- Source
named-readtables.lisp (file)