X-Git-Url: https://git.distorted.org.uk/~mdw/lisp/blobdiff_plain/9d3ccec7414eecee223bf9aa045924f2416ff609..0ff9df03bb54ba792cefa551face51748ae34259:/mdw-base.lisp

diff --git a/mdw-base.lisp b/mdw-base.lisp
index 1f5a3eb..cde1d7a 100644
--- a/mdw-base.lisp
+++ b/mdw-base.lisp
@@ -45,7 +45,7 @@
 
 (defmacro compile-time-defun (name args &body body)
   "Define a function which can be used by macros during the compilation
-process."
+   process."
   `(eval-when (:compile-toplevel :load-toplevel)
      (defun ,name ,args ,@body)))
 
@@ -58,8 +58,8 @@ process."
 
 (defun stringify (str)
   "Return a string representation of STR.  Strings are returned unchanged;
-symbols are converted to their names (unqualified!).  Other objects are
-converted to their print representations."
+   symbols are converted to their names (unqualified!).  Other objects are
+   converted to their print representations."
   (typecase str
     (string str)
     (symbol (symbol-name str))
@@ -81,12 +81,12 @@ converted to their print representations."
 
 (compile-time-defun fix-pair (x &optional (y nil defaultp))
   "Return two values extracted from X.  It works as follows:
-  (A) -> A, Y
-  (A B) -> A, B
-  (A B . C) -> error
-  (A . B) -> A, B
-  A -> A, Y
-where Y defaults to A if not specified."
+     (A) -> A, Y
+     (A B) -> A, B
+     (A B . C) -> error
+     (A . B) -> A, B
+     A -> A, Y
+   where Y defaults to A if not specified."
   (do-fix-pair x y defaultp))
 
 (compile-time-defun pairify (x &optional (y nil defaultp))
@@ -102,14 +102,15 @@ where Y defaults to A if not specified."
 (declaim (ftype (function nil ()) slot-unitialized))
 (defun slot-uninitialized ()
   "A function which signals an error.  Can be used as an initializer form in
-structure definitions without doom ensuing."
+   structure definitions without doom ensuing."
   (error "No initializer for slot."))
 
 (compile-time-defun parse-body (body)
   "Given a BODY (a list of forms), parses it into three sections: a
-docstring, a list of declarations (forms beginning with the symbol `declare')
-and the body forms.  The result is returned as three lists (even the
-docstring), suitable for interpolation into a backquoted list using `@,'."
+   docstring, a list of declarations (forms beginning with the symbol
+   `declare') and the body forms.  The result is returned as three lists
+   (even the docstring), suitable for interpolation into a backquoted list
+   using `@,'."
   (multiple-value-bind
       (doc body)
       (if (and (consp body)
@@ -134,9 +135,9 @@ docstring), suitable for interpolation into a backquoted list using `@,'."
 
 (defmacro let*/gensyms (binds &body body)
   "A macro helper.  BINDS is a list of binding pairs (VAR VALUE), where VALUE
-defaults to VAR.  The result is that BODY is evaluated in a context where
-each VAR is bound to a gensym, and in the final expansion, each of those
-gensyms will be bound to the corresponding VALUE."
+   defaults to VAR.  The result is that BODY is evaluated in a context where
+   each VAR is bound to a gensym, and in the final expansion, each of those
+   gensyms will be bound to the corresponding VALUE."
   (labels ((more (binds)
              (let ((tmp (gensym "TMP")) (bind (car binds)))
                `((let ((,tmp ,(cadr bind))
@@ -188,11 +189,11 @@ gensyms will be bound to the corresponding VALUE."
 
 (defmacro case2 (vform &body clauses)
   "VFORM is a form which evaluates to two values, SCRUTINEE and ARGUMENT.
-The CLAUSES have the form (CASES ([VAR]) FORMS...), where a standard `case'
-clause has the form (CASES FORMS...).  The `case2' form evaluates the VFORM,
-and compares the SCRUTINEE to the various CASES, in order, just like `case'.
-If there is a match, then the corresponding FORMs are evaluated with VAR (if
-specified) bound to the value of ARGUMENT."
+   The CLAUSES have the form (CASES ([VAR]) FORMS...), where a standard
+   `case' clause has the form (CASES FORMS...).  The `case2' form evaluates
+   the VFORM, and compares the SCRUTINEE to the various CASES, in order, just
+   like `case'.  If there is a match, then the corresponding FORMs are
+   evaluated with VAR (if specified) bound to the value of ARGUMENT."
   (do-case2-like 'case vform clauses))
 
 (defmacro ecase2 (vform &body clauses)
@@ -213,10 +214,10 @@ specified) bound to the value of ARGUMENT."
 
 (defmacro with-places ((&key environment) places &body body)
   "A hairy helper, for writing setf-like macros.  PLACES is a list of binding
-pairs (VAR PLACE), where PLACE defaults to VAR.  The result is that BODY is
-evaluated in a context where each VAR is bound to a gensym, and in the final
-expansion, each of those gensyms will be bound to a symbol-macro capable of
-reading or setting the value of the corresponding PLACE."
+   pairs (VAR PLACE), where PLACE defaults to VAR.  The result is that BODY
+   is evaluated in a context where each VAR is bound to a gensym, and in the
+   final expansion, each of those gensyms will be bound to a symbol-macro
+   capable of reading or setting the value of the corresponding PLACE."
   (if (null places)
       `(progn ,@body)
       (let*/gensyms (environment)
@@ -278,10 +279,10 @@ reading or setting the value of the corresponding PLACE."
 
 (defmacro locf (place &environment env)
   "Slightly cheesy locatives.  (locf PLACE) returns an object which, using
-the `ref' function, can be used to read or set the value of PLACE.  It's
-cheesy because it uses closures rather than actually taking the address of
-something.  Also, unlike Zetalisp, we don't overload `car' to do our dirty
-work."
+   the `ref' function, can be used to read or set the value of PLACE.  It's
+   cheesy because it uses closures rather than actually taking the address of
+   something.  Also, unlike Zetalisp, we don't overload `car' to do our dirty
+   work."
   (multiple-value-bind
       (valtmps valforms newtmps setform getform)
       (get-setf-expansion place env)
@@ -301,13 +302,14 @@ work."
 
 (defmacro with-locatives (locs &body body)
   "LOCS is a list of items of the form (SYM [LOC-EXPR]), where SYM is a
-symbol and LOC-EXPR evaluates to a locative.  If LOC-EXPR is omitted, it
-defaults to SYM.  As an abbreviation for a common case, LOCS may be a symbol
-instead of a list.  The BODY is evaluated in an environment where each SYM is
-a symbol macro which expands to (ref LOC-EXPR) -- or, in fact, something
-similar which doesn't break if LOC-EXPR has side-effects.  Thus, references,
-including `setf' forms, fetch or modify the thing referred to by the
-LOC-EXPR.  Useful for covering over where something uses a locative."
+   symbol and LOC-EXPR evaluates to a locative.  If LOC-EXPR is omitted, it
+   defaults to SYM.  As an abbreviation for a common case, LOCS may be a
+   symbol instead of a list.  The BODY is evaluated in an environment where
+   each SYM is a symbol macro which expands to (ref LOC-EXPR) -- or, in fact,
+   something similar which doesn't break if LOC-EXPR has side-effects.  Thus,
+   references, including `setf' forms, fetch or modify the thing referred to
+   by the LOC-EXPR.  Useful for covering over where something uses a
+   locative."
   (setf locs (mapcar #'pairify (listify locs)))
   (let ((tt (mapcar (lambda (l) (declare (ignore l)) (gensym)) locs))
 	(ll (mapcar #'cadr locs))