- (let ((found (find-free-variable name)))
- (when (heap-alien-info-p found)
- (compiler-error
- "~S is an alien variable and so can't be declared special."
- name))
- (unless (global-var-p found)
- (compiler-error
- "~S is a constant and so can't be declared special."
- name))
- found))
- (t
- (make-global-var :kind :special
- :%source-name name
- :where-from :declared))))
-\f
-;;;; LAMBDA hackery
-
-;;;; Note: Take a look at the compiler-overview.tex section on "Hairy
-;;;; function representation" before you seriously mess with this
-;;;; stuff.
-
-;;; Verify that a thing is a legal name for a variable and return a
-;;; Var structure for it, filling in info if it is globally special.
-;;; If it is losing, we punt with a Compiler-Error. Names-So-Far is an
-;;; alist of names which have previously been bound. If the name is in
-;;; this list, then we error out.
-(declaim (ftype (function (t list) lambda-var) varify-lambda-arg))
-(defun varify-lambda-arg (name names-so-far)
- (declare (inline member))
- (unless (symbolp name)
- (compiler-error "The lambda-variable ~S is not a symbol." name))
- (when (member name names-so-far :test #'eq)
- (compiler-error "The variable ~S occurs more than once in the lambda-list."
- name))
- (let ((kind (info :variable :kind name)))
- (when (or (keywordp name) (eq kind :constant))
- (compiler-error "The name of the lambda-variable ~S is a constant."
- name))
- (cond ((eq kind :special)
- (let ((specvar (find-free-variable name)))
- (make-lambda-var :%source-name name
- :type (leaf-type specvar)
- :where-from (leaf-where-from specvar)
- :specvar specvar)))
- (t
- (note-lexical-binding name)
- (make-lambda-var :%source-name name)))))
-
-;;; Make the default keyword for a &KEY arg, checking that the keyword
-;;; isn't already used by one of the VARS. We also check that the
-;;; keyword isn't the magical :ALLOW-OTHER-KEYS.
-(declaim (ftype (function (symbol list t) keyword) make-keyword-for-arg))
-(defun make-keyword-for-arg (symbol vars keywordify)
- (let ((key (if (and keywordify (not (keywordp symbol)))
- (keywordicate symbol)
- symbol)))
- (when (eq key :allow-other-keys)
- (compiler-error "No &KEY arg can be called :ALLOW-OTHER-KEYS."))
- (dolist (var vars)
- (let ((info (lambda-var-arg-info var)))
- (when (and info
- (eq (arg-info-kind info) :keyword)
- (eq (arg-info-key info) key))
- (compiler-error
- "The keyword ~S appears more than once in the lambda-list."
- key))))
- key))
-
-;;; Parse a lambda list into a list of VAR structures, stripping off
-;;; any &AUX bindings. Each arg name is checked for legality, and
-;;; duplicate names are checked for. If an arg is globally special,
-;;; the var is marked as :SPECIAL instead of :LEXICAL. &KEY,
-;;; &OPTIONAL and &REST args are annotated with an ARG-INFO structure
-;;; which contains the extra information. If we hit something losing,
-;;; we bug out with COMPILER-ERROR. These values are returned:
-;;; 1. a list of the var structures for each top level argument;
-;;; 2. a flag indicating whether &KEY was specified;
-;;; 3. a flag indicating whether other &KEY args are allowed;
-;;; 4. a list of the &AUX variables; and
-;;; 5. a list of the &AUX values.
-(declaim (ftype (function (list) (values list boolean boolean list list))
- make-lambda-vars))
-(defun make-lambda-vars (list)
- (multiple-value-bind (required optional restp rest keyp keys allowp aux
- morep more-context more-count)
- (parse-lambda-list list)
- (collect ((vars)
- (names-so-far)
- (aux-vars)
- (aux-vals))
- (flet (;; PARSE-DEFAULT deals with defaults and supplied-p args
- ;; for optionals and keywords args.
- (parse-default (spec info)
- (when (consp (cdr spec))
- (setf (arg-info-default info) (second spec))
- (when (consp (cddr spec))
- (let* ((supplied-p (third spec))
- (supplied-var (varify-lambda-arg supplied-p
- (names-so-far))))
- (setf (arg-info-supplied-p info) supplied-var)
- (names-so-far supplied-p)
- (when (> (length (the list spec)) 3)
- (compiler-error
- "The list ~S is too long to be an arg specifier."
- spec)))))))
-
- (dolist (name required)
- (let ((var (varify-lambda-arg name (names-so-far))))
- (vars var)
- (names-so-far name)))
-
- (dolist (spec optional)
- (if (atom spec)
- (let ((var (varify-lambda-arg spec (names-so-far))))
- (setf (lambda-var-arg-info var) (make-arg-info :kind :optional))
- (vars var)
- (names-so-far spec))
- (let* ((name (first spec))
- (var (varify-lambda-arg name (names-so-far)))
- (info (make-arg-info :kind :optional)))
- (setf (lambda-var-arg-info var) info)
- (vars var)
- (names-so-far name)
- (parse-default spec info))))
-
- (when restp
- (let ((var (varify-lambda-arg rest (names-so-far))))
- (setf (lambda-var-arg-info var) (make-arg-info :kind :rest))
- (vars var)
- (names-so-far rest)))
-
- (when morep
- (let ((var (varify-lambda-arg more-context (names-so-far))))
- (setf (lambda-var-arg-info var)
- (make-arg-info :kind :more-context))
- (vars var)
- (names-so-far more-context))
- (let ((var (varify-lambda-arg more-count (names-so-far))))
- (setf (lambda-var-arg-info var)
- (make-arg-info :kind :more-count))
- (vars var)
- (names-so-far more-count)))
-
- (dolist (spec keys)
- (cond
- ((atom spec)
- (let ((var (varify-lambda-arg spec (names-so-far))))
- (setf (lambda-var-arg-info var)
- (make-arg-info :kind :keyword
- :key (make-keyword-for-arg spec
- (vars)
- t)))
- (vars var)
- (names-so-far spec)))
- ((atom (first spec))
- (let* ((name (first spec))
- (var (varify-lambda-arg name (names-so-far)))
- (info (make-arg-info
- :kind :keyword
- :key (make-keyword-for-arg name (vars) t))))
- (setf (lambda-var-arg-info var) info)
- (vars var)
- (names-so-far name)
- (parse-default spec info)))
- (t
- (let ((head (first spec)))
- (unless (proper-list-of-length-p head 2)
- (error "malformed &KEY argument specifier: ~S" spec))
- (let* ((name (second head))
- (var (varify-lambda-arg name (names-so-far)))
- (info (make-arg-info
- :kind :keyword
- :key (make-keyword-for-arg (first head)
- (vars)
- nil))))
- (setf (lambda-var-arg-info var) info)
- (vars var)
- (names-so-far name)
- (parse-default spec info))))))
-
- (dolist (spec aux)
- (cond ((atom spec)
- (let ((var (varify-lambda-arg spec nil)))
- (aux-vars var)
- (aux-vals nil)
- (names-so-far spec)))
- (t
- (unless (proper-list-of-length-p spec 1 2)
- (compiler-error "malformed &AUX binding specifier: ~S"
- spec))
- (let* ((name (first spec))
- (var (varify-lambda-arg name nil)))
- (aux-vars var)
- (aux-vals (second spec))
- (names-so-far name)))))
-
- (values (vars) keyp allowp (aux-vars) (aux-vals))))))
-
-;;; This is similar to IR1-CONVERT-PROGN-BODY except that we
-;;; sequentially bind each AUX-VAR to the corresponding AUX-VAL before
-;;; converting the body. If there are no bindings, just convert the
-;;; body, otherwise do one binding and recurse on the rest.
-(defun ir1-convert-aux-bindings (start cont body aux-vars aux-vals)
- (declare (type continuation start cont) (list body aux-vars aux-vals))
- (if (null aux-vars)
- (ir1-convert-progn-body start cont body)
- (let ((fun-cont (make-continuation))
- (fun (ir1-convert-lambda-body body
- (list (first aux-vars))
- :aux-vars (rest aux-vars)
- :aux-vals (rest aux-vals)
- :debug-name (debug-namify
- "&AUX bindings ~S"
- aux-vars))))
- (reference-leaf start fun-cont fun)
- (ir1-convert-combination-args fun-cont cont
- (list (first aux-vals)))))
- (values))
-
-;;; This is similar to IR1-CONVERT-PROGN-BODY except that code to bind
-;;; the SPECVAR for each SVAR to the value of the variable is wrapped
-;;; around the body. If there are no special bindings, we just convert
-;;; the body, otherwise we do one special binding and recurse on the
-;;; rest.
-;;;
-;;; We make a cleanup and introduce it into the lexical environment.
-;;; If there are multiple special bindings, the cleanup for the blocks
-;;; will end up being the innermost one. We force CONT to start a
-;;; block outside of this cleanup, causing cleanup code to be emitted
-;;; when the scope is exited.
-(defun ir1-convert-special-bindings (start cont body aux-vars aux-vals svars)
- (declare (type continuation start cont)
- (list body aux-vars aux-vals svars))
- (cond
- ((null svars)
- (ir1-convert-aux-bindings start cont body aux-vars aux-vals))
- (t
- (continuation-starts-block cont)
- (let ((cleanup (make-cleanup :kind :special-bind))
- (var (first svars))
- (next-cont (make-continuation))
- (nnext-cont (make-continuation)))
- (ir1-convert start next-cont
- `(%special-bind ',(lambda-var-specvar var) ,var))
- (setf (cleanup-mess-up cleanup) (continuation-use next-cont))
- (let ((*lexenv* (make-lexenv :cleanup cleanup)))
- (ir1-convert next-cont nnext-cont '(%cleanup-point))
- (ir1-convert-special-bindings nnext-cont cont body aux-vars aux-vals
- (rest svars))))))
- (values))
-
-;;; Create a lambda node out of some code, returning the result. The
-;;; bindings are specified by the list of VAR structures VARS. We deal
-;;; with adding the names to the LEXENV-VARIABLES for the conversion.
-;;; The result is added to the NEW-FUNS in the *CURRENT-COMPONENT* and
-;;; linked to the component head and tail.
-;;;
-;;; We detect special bindings here, replacing the original VAR in the
-;;; lambda list with a temporary variable. We then pass a list of the
-;;; special vars to IR1-CONVERT-SPECIAL-BINDINGS, which actually emits
-;;; the special binding code.
-;;;
-;;; We ignore any ARG-INFO in the VARS, trusting that someone else is
-;;; dealing with &nonsense.
-;;;
-;;; AUX-VARS is a list of VAR structures for variables that are to be
-;;; sequentially bound. Each AUX-VAL is a form that is to be evaluated
-;;; to get the initial value for the corresponding AUX-VAR.
-(defun ir1-convert-lambda-body (body
- vars
- &key
- aux-vars
- aux-vals
- result
- (source-name '.anonymous.)
- debug-name)
- (declare (list body vars aux-vars aux-vals)
- (type (or continuation null) result))
- (let* ((bind (make-bind))
- (lambda (make-lambda :vars vars
- :bind bind
- :%source-name source-name
- :%debug-name debug-name))
- (result (or result (make-continuation))))
-
- ;; just to check: This function should fail internal assertions if
- ;; we didn't set up a valid debug name above.
- ;;
- ;; (In SBCL we try to make everything have a debug name, since we
- ;; lack the omniscient perspective the original implementors used
- ;; to decide which things didn't need one.)
- (functional-debug-name lambda)
-
- (setf (lambda-home lambda) lambda)
- (collect ((svars)
- (new-venv nil cons))
-
- (dolist (var vars)
- ;; As far as I can see, LAMBDA-VAR-HOME should never have
- ;; been set before. Let's make sure. -- WHN 2001-09-29
- (aver (null (lambda-var-home var)))
- (setf (lambda-var-home var) lambda)
- (let ((specvar (lambda-var-specvar var)))
- (cond (specvar
- (svars var)
- (new-venv (cons (leaf-source-name specvar) specvar)))
- (t
- (note-lexical-binding (leaf-source-name var))
- (new-venv (cons (leaf-source-name var) var))))))
-
- (let ((*lexenv* (make-lexenv :variables (new-venv)
- :lambda lambda
- :cleanup nil)))
- (setf (bind-lambda bind) lambda)
- (setf (node-lexenv bind) *lexenv*)
-
- (let ((cont1 (make-continuation))
- (cont2 (make-continuation)))
- (continuation-starts-block cont1)
- (prev-link bind cont1)
- (use-continuation bind cont2)
- (ir1-convert-special-bindings cont2 result body aux-vars aux-vals
- (svars)))
-
- (let ((block (continuation-block result)))
- (when block
- (let ((return (make-return :result result :lambda lambda))
- (tail-set (make-tail-set :funs (list lambda)))
- (dummy (make-continuation)))
- (setf (lambda-tail-set lambda) tail-set)
- (setf (lambda-return lambda) return)
- (setf (continuation-dest result) return)
- (setf (block-last block) return)
- (prev-link return result)
- (use-continuation return dummy))
- (link-blocks block (component-tail *current-component*))))))
-
- (link-blocks (component-head *current-component*) (node-block bind))
- (push lambda (component-new-funs *current-component*))
- lambda))
-
-;;; Create the actual entry-point function for an optional entry
-;;; point. The lambda binds copies of each of the VARS, then calls FUN
-;;; with the argument VALS and the DEFAULTS. Presumably the VALS refer
-;;; to the VARS by name. The VALS are passed in in reverse order.
-;;;
-;;; If any of the copies of the vars are referenced more than once,
-;;; then we mark the corresponding var as EVER-USED to inhibit
-;;; "defined but not read" warnings for arguments that are only used
-;;; by default forms.
-(defun convert-optional-entry (fun vars vals defaults)
- (declare (type clambda fun) (list vars vals defaults))
- (let* ((fvars (reverse vars))
- (arg-vars (mapcar (lambda (var)
- (unless (lambda-var-specvar var)
- (note-lexical-binding (leaf-source-name var)))
- (make-lambda-var
- :%source-name (leaf-source-name var)
- :type (leaf-type var)
- :where-from (leaf-where-from var)
- :specvar (lambda-var-specvar var)))
- fvars))
- (fun (ir1-convert-lambda-body `((%funcall ,fun
- ,@(reverse vals)
- ,@defaults))
- arg-vars
- :debug-name "&OPTIONAL processor")))
- (mapc (lambda (var arg-var)
- (when (cdr (leaf-refs arg-var))
- (setf (leaf-ever-used var) t)))
- fvars arg-vars)
- fun))
-
-;;; This function deals with supplied-p vars in optional arguments. If
-;;; the there is no supplied-p arg, then we just call
-;;; IR1-CONVERT-HAIRY-ARGS on the remaining arguments, and generate a
-;;; optional entry that calls the result. If there is a supplied-p
-;;; var, then we add it into the default vars and throw a T into the
-;;; entry values. The resulting entry point function is returned.
-(defun generate-optional-default-entry (res default-vars default-vals
- entry-vars entry-vals
- vars supplied-p-p body
- aux-vars aux-vals cont)
- (declare (type optional-dispatch res)
- (list default-vars default-vals entry-vars entry-vals vars body
- aux-vars aux-vals)
- (type (or continuation null) cont))
- (let* ((arg (first vars))
- (arg-name (leaf-source-name arg))
- (info (lambda-var-arg-info arg))
- (supplied-p (arg-info-supplied-p info))
- (ep (if supplied-p
- (ir1-convert-hairy-args
- res
- (list* supplied-p arg default-vars)
- (list* (leaf-source-name supplied-p) arg-name default-vals)
- (cons arg entry-vars)
- (list* t arg-name entry-vals)
- (rest vars) t body aux-vars aux-vals cont)
- (ir1-convert-hairy-args
- res
- (cons arg default-vars)
- (cons arg-name default-vals)
- (cons arg entry-vars)
- (cons arg-name entry-vals)
- (rest vars) supplied-p-p body aux-vars aux-vals cont))))
-
- (convert-optional-entry ep default-vars default-vals
- (if supplied-p
- (list (arg-info-default info) nil)
- (list (arg-info-default info))))))
-
-;;; Create the MORE-ENTRY function for the OPTIONAL-DISPATCH RES.
-;;; ENTRY-VARS and ENTRY-VALS describe the fixed arguments. REST is
-;;; the var for any &REST arg. KEYS is a list of the &KEY arg vars.
-;;;
-;;; The most interesting thing that we do is parse keywords. We create
-;;; a bunch of temporary variables to hold the result of the parse,
-;;; and then loop over the supplied arguments, setting the appropriate
-;;; temps for the supplied keyword. Note that it is significant that
-;;; we iterate over the keywords in reverse order --- this implements
-;;; the CL requirement that (when a keyword appears more than once)
-;;; the first value is used.
-;;;
-;;; If there is no supplied-p var, then we initialize the temp to the
-;;; default and just pass the temp into the main entry. Since
-;;; non-constant &KEY args are forcibly given a supplied-p var, we
-;;; know that the default is constant, and thus safe to evaluate out
-;;; of order.
-;;;
-;;; If there is a supplied-p var, then we create temps for both the
-;;; value and the supplied-p, and pass them into the main entry,
-;;; letting it worry about defaulting.
-;;;
-;;; We deal with :ALLOW-OTHER-KEYS by delaying unknown keyword errors
-;;; until we have scanned all the keywords.
-(defun convert-more-entry (res entry-vars entry-vals rest morep keys)
- (declare (type optional-dispatch res) (list entry-vars entry-vals keys))
- (collect ((arg-vars)
- (arg-vals (reverse entry-vals))
- (temps)
- (body))
-
- (dolist (var (reverse entry-vars))
- (arg-vars (make-lambda-var :%source-name (leaf-source-name var)
- :type (leaf-type var)
- :where-from (leaf-where-from var))))
-
- (let* ((n-context (gensym "N-CONTEXT-"))
- (context-temp (make-lambda-var :%source-name n-context))
- (n-count (gensym "N-COUNT-"))
- (count-temp (make-lambda-var :%source-name n-count
- :type (specifier-type 'index))))
-
- (arg-vars context-temp count-temp)
-
- (when rest
- (arg-vals `(%listify-rest-args ,n-context ,n-count)))
- (when morep
- (arg-vals n-context)
- (arg-vals n-count))
-
- (when (optional-dispatch-keyp res)
- (let ((n-index (gensym "N-INDEX-"))
- (n-key (gensym "N-KEY-"))
- (n-value-temp (gensym "N-VALUE-TEMP-"))
- (n-allowp (gensym "N-ALLOWP-"))
- (n-losep (gensym "N-LOSEP-"))
- (allowp (or (optional-dispatch-allowp res)
- (policy *lexenv* (zerop safety)))))
-
- (temps `(,n-index (1- ,n-count)) n-key n-value-temp)
- (body `(declare (fixnum ,n-index) (ignorable ,n-key ,n-value-temp)))
-
- (collect ((tests))
- (dolist (key keys)
- (let* ((info (lambda-var-arg-info key))
- (default (arg-info-default info))
- (keyword (arg-info-key info))
- (supplied-p (arg-info-supplied-p info))
- (n-value (gensym "N-VALUE-")))
- (temps `(,n-value ,default))
- (cond (supplied-p
- (let ((n-supplied (gensym "N-SUPPLIED-")))
- (temps n-supplied)
- (arg-vals n-value n-supplied)
- (tests `((eq ,n-key ',keyword)
- (setq ,n-supplied t)
- (setq ,n-value ,n-value-temp)))))
- (t
- (arg-vals n-value)
- (tests `((eq ,n-key ',keyword)
- (setq ,n-value ,n-value-temp)))))))
-
- (unless allowp
- (temps n-allowp n-losep)
- (tests `((eq ,n-key :allow-other-keys)
- (setq ,n-allowp ,n-value-temp)))
- (tests `(t
- (setq ,n-losep ,n-key))))
-
- (body
- `(when (oddp ,n-count)
- (%odd-key-arguments-error)))
-
- (body
- `(locally
- (declare (optimize (safety 0)))
- (loop
- (when (minusp ,n-index) (return))
- (setf ,n-value-temp (%more-arg ,n-context ,n-index))
- (decf ,n-index)
- (setq ,n-key (%more-arg ,n-context ,n-index))
- (decf ,n-index)
- (cond ,@(tests)))))
-
- (unless allowp
- (body `(when (and ,n-losep (not ,n-allowp))
- (%unknown-key-argument-error ,n-losep)))))))
-
- (let ((ep (ir1-convert-lambda-body
- `((let ,(temps)
- ,@(body)
- (%funcall ,(optional-dispatch-main-entry res)
- . ,(arg-vals)))) ; FIXME: What is the '.'? ,@?
- (arg-vars)
- :debug-name (debug-namify "~S processing" '&more))))
- (setf (optional-dispatch-more-entry res) ep))))
-
- (values))
-
-;;; This is called by IR1-CONVERT-HAIRY-ARGS when we run into a &REST
-;;; or &KEY arg. The arguments are similar to that function, but we
-;;; split off any &REST arg and pass it in separately. REST is the
-;;; &REST arg var, or NIL if there is no &REST arg. KEYS is a list of
-;;; the &KEY argument vars.
-;;;
-;;; When there are &KEY arguments, we introduce temporary gensym
-;;; variables to hold the values while keyword defaulting is in
-;;; progress to get the required sequential binding semantics.
-;;;
-;;; This gets interesting mainly when there are &KEY arguments with
-;;; supplied-p vars or non-constant defaults. In either case, pass in
-;;; a supplied-p var. If the default is non-constant, we introduce an
-;;; IF in the main entry that tests the supplied-p var and decides
-;;; whether to evaluate the default or not. In this case, the real
-;;; incoming value is NIL, so we must union NULL with the declared
-;;; type when computing the type for the main entry's argument.
-(defun ir1-convert-more (res default-vars default-vals entry-vars entry-vals
- rest more-context more-count keys supplied-p-p
- body aux-vars aux-vals cont)
- (declare (type optional-dispatch res)
- (list default-vars default-vals entry-vars entry-vals keys body
- aux-vars aux-vals)
- (type (or continuation null) cont))
- (collect ((main-vars (reverse default-vars))
- (main-vals default-vals cons)
- (bind-vars)
- (bind-vals))
- (when rest
- (main-vars rest)
- (main-vals '()))
- (when more-context
- (main-vars more-context)
- (main-vals nil)
- (main-vars more-count)
- (main-vals 0))
-
- (dolist (key keys)
- (let* ((info (lambda-var-arg-info key))
- (default (arg-info-default info))
- (hairy-default (not (sb!xc:constantp default)))
- (supplied-p (arg-info-supplied-p info))
- (n-val (make-symbol (format nil
- "~A-DEFAULTING-TEMP"
- (leaf-source-name key))))
- (key-type (leaf-type key))
- (val-temp (make-lambda-var
- :%source-name n-val
- :type (if hairy-default
- (type-union key-type (specifier-type 'null))
- key-type))))
- (main-vars val-temp)
- (bind-vars key)
- (cond ((or hairy-default supplied-p)
- (let* ((n-supplied (gensym "N-SUPPLIED-"))
- (supplied-temp (make-lambda-var
- :%source-name n-supplied)))
- (unless supplied-p
- (setf (arg-info-supplied-p info) supplied-temp))
- (when hairy-default
- (setf (arg-info-default info) nil))
- (main-vars supplied-temp)
- (cond (hairy-default
- (main-vals nil nil)
- (bind-vals `(if ,n-supplied ,n-val ,default)))
- (t
- (main-vals default nil)
- (bind-vals n-val)))
- (when supplied-p
- (bind-vars supplied-p)
- (bind-vals n-supplied))))
- (t
- (main-vals (arg-info-default info))
- (bind-vals n-val)))))
-
- (let* ((main-entry (ir1-convert-lambda-body
- body (main-vars)
- :aux-vars (append (bind-vars) aux-vars)
- :aux-vals (append (bind-vals) aux-vals)
- :result cont
- :debug-name (debug-namify "~S processor" '&more)))
- (last-entry (convert-optional-entry main-entry default-vars
- (main-vals) ())))
- (setf (optional-dispatch-main-entry res) main-entry)
- (convert-more-entry res entry-vars entry-vals rest more-context keys)
-
- (push (if supplied-p-p
- (convert-optional-entry last-entry entry-vars entry-vals ())
- last-entry)
- (optional-dispatch-entry-points res))
- last-entry)))
-
-;;; This function generates the entry point functions for the
-;;; OPTIONAL-DISPATCH RES. We accomplish this by recursion on the list
-;;; of arguments, analyzing the arglist on the way down and generating
-;;; entry points on the way up.
-;;;
-;;; DEFAULT-VARS is a reversed list of all the argument vars processed
-;;; so far, including supplied-p vars. DEFAULT-VALS is a list of the
-;;; names of the DEFAULT-VARS.
-;;;
-;;; ENTRY-VARS is a reversed list of processed argument vars,
-;;; excluding supplied-p vars. ENTRY-VALS is a list things that can be
-;;; evaluated to get the values for all the vars from the ENTRY-VARS.
-;;; It has the var name for each required or optional arg, and has T
-;;; for each supplied-p arg.
-;;;
-;;; VARS is a list of the LAMBDA-VAR structures for arguments that
-;;; haven't been processed yet. SUPPLIED-P-P is true if a supplied-p
-;;; argument has already been processed; only in this case are the
-;;; DEFAULT-XXX and ENTRY-XXX different.
-;;;
-;;; The result at each point is a lambda which should be called by the
-;;; above level to default the remaining arguments and evaluate the
-;;; body. We cause the body to be evaluated by converting it and
-;;; returning it as the result when the recursion bottoms out.
-;;;
-;;; Each level in the recursion also adds its entry point function to
-;;; the result OPTIONAL-DISPATCH. For most arguments, the defaulting
-;;; function and the entry point function will be the same, but when
-;;; SUPPLIED-P args are present they may be different.
-;;;
-;;; When we run into a &REST or &KEY arg, we punt out to
-;;; IR1-CONVERT-MORE, which finishes for us in this case.
-(defun ir1-convert-hairy-args (res default-vars default-vals
- entry-vars entry-vals
- vars supplied-p-p body aux-vars
- aux-vals cont)
- (declare (type optional-dispatch res)
- (list default-vars default-vals entry-vars entry-vals vars body
- aux-vars aux-vals)
- (type (or continuation null) cont))
- (cond ((not vars)
- (if (optional-dispatch-keyp res)
- ;; Handle &KEY with no keys...
- (ir1-convert-more res default-vars default-vals
- entry-vars entry-vals
- nil nil nil vars supplied-p-p body aux-vars
- aux-vals cont)
- (let ((fun (ir1-convert-lambda-body
- body (reverse default-vars)
- :aux-vars aux-vars
- :aux-vals aux-vals
- :result cont
- :debug-name "hairy arg processor")))
- (setf (optional-dispatch-main-entry res) fun)
- (push (if supplied-p-p
- (convert-optional-entry fun entry-vars entry-vals ())
- fun)
- (optional-dispatch-entry-points res))
- fun)))
- ((not (lambda-var-arg-info (first vars)))
- (let* ((arg (first vars))
- (nvars (cons arg default-vars))
- (nvals (cons (leaf-source-name arg) default-vals)))
- (ir1-convert-hairy-args res nvars nvals nvars nvals
- (rest vars) nil body aux-vars aux-vals
- cont)))