;;; Code:
(define-module (language elisp runtime)
+ #:use-module (ice-9 format)
+ #:use-module ((system base compile)
+ #:select (compile))
+ #:use-module (language tree-il eval)
#:export (nil-value
t-value
value-slot-module
function-slot-module
elisp-bool
- ensure-fluid!
- symbol-fluid
- set-symbol-fluid!
+ ensure-dynamic!
+ symbol-name
symbol-value
set-symbol-value!
symbol-function
set-symbol-function!
+ symbol-plist
+ set-symbol-plist!
symbol-bound?
symbol-fbound?
+ symbol-default-bound?
+ symbol-default-value
+ set-symbol-default-value!
+ bind-symbol
makunbound!
- fmakunbound!)
+ fmakunbound!
+ symbol-desc
+ proclaim-special!
+ special?
+ emacs!
+ unbound
+ lexical-binding?
+ set-lexical-binding-mode
+ log!
+ eval-elisp
+ compile-elisp
+ local-eval-elisp
+ make-lisp-string
+ lisp-string?)
#:export-syntax (defspecial prim))
;;; This module provides runtime support for the Elisp front-end.
(define t-value #t)
+(define make-lisp-string identity)
+(define lisp-string? string?)
+
;;; Modules for the binding slots.
;;; Note: Naming those value-slot and/or function-slot clashes with the
;;; submodules of these names!
-(define value-slot-module '(language elisp runtime value-slot))
+(define value-slot-module (define-module* '(elisp-symbols) #:pure #t))
+
+(define function-slot-module (define-module* '(elisp-functions) #:pure #t))
-(define function-slot-module '(language elisp runtime function-slot))
+(define plist-slot-module (define-module* '(elisp-plists) #:pure #t))
+
+(define nil_ 'nil)
+(define t_ 't)
;;; Routines for access to elisp dynamically bound symbols. This is
;;; used for runtime access using functions like symbol-value or set,
;;; always access the dynamic binding and can not be used for the
;;; lexical!
-(define (ensure-fluid! module sym)
- (let ((intf (resolve-interface module))
- (resolved (resolve-module module)))
- (if (not (module-defined? intf sym))
- (let ((fluid (make-unbound-fluid)))
- (module-define! resolved sym fluid)
- (module-export! resolved `(,sym))))))
-
-(define (symbol-fluid symbol)
- (let ((module (resolve-module value-slot-module)))
- (ensure-fluid! value-slot-module symbol) ;++ implicit special proclamation
- (module-ref module symbol)))
+(define lexical-binding #t)
+
+(define (lexical-binding?)
+ lexical-binding)
+
+(define (set-lexical-binding-mode x)
+ (set! lexical-binding x))
+
+(define unbound (make-symbol "unbound"))
+
+(define dynamic? vector?)
+(define (make-dynamic)
+ (vector #f 4 0 0 unbound))
+(define (dynamic-ref x)
+ (vector-ref x 4))
+(define (dynamic-set! x v)
+ (vector-set! x 4 v))
+(define (dynamic-unset! x)
+ (vector-set! x 4 unbound))
+(define (dynamic-bound? x)
+ (not (eq? (vector-ref x 4) unbound)))
+(define (dynamic-bind x v thunk)
+ (let ((old (vector-ref x 4)))
+ (dynamic-wind
+ (lambda () (vector-set! x 4 v))
+ thunk
+ (lambda () (vector-set! x 4 old)))))
-(define (set-symbol-fluid! symbol fluid)
- (let ((module (resolve-module value-slot-module)))
- (module-define! module symbol fluid)
- (module-export! module (list symbol)))
- fluid)
+(define-inlinable (ensure-present! module sym thunk)
+ (or (module-local-variable module sym)
+ (let ((variable (make-variable (thunk))))
+ (module-add! module sym variable)
+ variable)))
+
+(define-inlinable (ensure-desc! module sym)
+ (ensure-present! module
+ sym
+ (lambda ()
+ (let ((x (make-dynamic)))
+ (vector-set! x 0 sym)
+ x))))
+
+(define-inlinable (schemify symbol)
+ (case symbol
+ ((#nil) nil_)
+ ((#t) t_)
+ (else symbol)))
+
+(define (symbol-name symbol)
+ (symbol->string (schemify symbol)))
+
+(define (symbol-desc symbol)
+ (let ((symbol (schemify symbol)))
+ (let ((module value-slot-module))
+ (variable-ref (ensure-desc! module symbol)))))
+
+(define (ensure-dynamic! sym)
+ (vector-set! (symbol-desc sym) 3 1))
+
+(define (symbol-dynamic symbol)
+ (ensure-dynamic! symbol)
+ (symbol-desc symbol))
(define (symbol-value symbol)
- (fluid-ref (symbol-fluid symbol)))
+ (dynamic-ref (symbol-desc symbol)))
(define (set-symbol-value! symbol value)
- (fluid-set! (symbol-fluid symbol) value)
+ (dynamic-set! (symbol-desc symbol) value)
value)
(define (symbol-function symbol)
- (let ((module (resolve-module function-slot-module)))
- (module-ref module symbol)))
+ (cond
+ ((module-variable function-slot-module (schemify symbol))
+ => variable-ref)
+ (else #nil)))
(define (set-symbol-function! symbol value)
- (let ((module (resolve-module function-slot-module)))
+ (set! symbol (schemify symbol))
+ (ensure-present! function-slot-module symbol (lambda () #nil))
+ (let ((module function-slot-module))
+ (module-define! module symbol value)
+ (module-export! module (list symbol)))
+ value)
+
+(define (symbol-plist symbol)
+ (set! symbol (schemify symbol))
+ (ensure-present! plist-slot-module symbol (lambda () #nil))
+ (let ((module plist-slot-module))
+ (module-ref module symbol)))
+
+(define (set-symbol-plist! symbol value)
+ (set! symbol (schemify symbol))
+ (ensure-present! plist-slot-module symbol (lambda () #nil))
+ (let ((module plist-slot-module))
(module-define! module symbol value)
(module-export! module (list symbol)))
value)
(define (symbol-bound? symbol)
+ (set! symbol (schemify symbol))
(and
- (module-bound? (resolve-interface value-slot-module) symbol)
- (let ((var (module-variable (resolve-module value-slot-module)
+ (module-bound? value-slot-module symbol)
+ (let ((var (module-variable value-slot-module
symbol)))
(and (variable-bound? var)
- (if (fluid? (variable-ref var))
- (fluid-bound? (variable-ref var))
+ (if (dynamic? (variable-ref var))
+ (dynamic-bound? (variable-ref var))
#t)))))
+(define symbol-default-bound? symbol-bound?)
+
+(define symbol-default-value symbol-value)
+
+(define set-symbol-default-value! set-symbol-value!)
+
(define (symbol-fbound? symbol)
+ (set! symbol (schemify symbol))
(and
- (module-bound? (resolve-interface function-slot-module) symbol)
+ (module-bound? function-slot-module symbol)
(variable-bound?
- (module-variable (resolve-module function-slot-module)
- symbol))))
+ (module-variable function-slot-module symbol))
+ (variable-ref (module-variable function-slot-module symbol))))
+
+(define (bind-symbol symbol value thunk)
+ (dynamic-bind (symbol-desc symbol) value thunk))
(define (makunbound! symbol)
- (if (module-bound? (resolve-interface value-slot-module) symbol)
- (let ((var (module-variable (resolve-module value-slot-module)
+ (if (module-bound? value-slot-module symbol)
+ (let ((var (module-variable value-slot-module
symbol)))
- (if (and (variable-bound? var) (fluid? (variable-ref var)))
- (fluid-unset! (variable-ref var))
+ (if (and (variable-bound? var) (dynamic? (variable-ref var)))
+ (dynamic-unset! (variable-ref var))
(variable-unset! var))))
symbol)
(define (fmakunbound! symbol)
- (if (module-bound? (resolve-interface function-slot-module) symbol)
- (variable-unset! (module-variable
- (resolve-module function-slot-module)
- symbol)))
+ (if (module-bound? function-slot-module symbol)
+ (variable-unset! (module-variable function-slot-module symbol)))
symbol)
+(define (special? sym)
+ (eqv? (vector-ref (symbol-desc sym) 3) 1))
+
+(define (proclaim-special! sym)
+ (vector-set! (symbol-desc sym) 3 1)
+ #nil)
+
+(define (emacs! ref set boundp dref dset dboundp bind)
+ (set! symbol-value ref)
+ (set! set-symbol-value! set)
+ (set! symbol-bound? boundp)
+ (set! symbol-default-value dref)
+ (set! set-symbol-default-value! dset)
+ (set! symbol-default-bound? dboundp)
+ (set! bind-symbol bind)
+ (set! lexical-binding? (lambda () (symbol-value 'lexical-binding)))
+ (set! set-lexical-binding-mode (lambda (x) (set-symbol-value! 'lexical-binding x))))
+
+(define (eval-elisp form)
+ (eval (compile form #:from 'elisp #:to 'tree-il) (current-module)))
+
+(define (compile-elisp form)
+ (compile (compile form #:from 'elisp #:to 'bytecode)
+ #:from 'bytecode #:to 'value))
+
+(set-symbol-value! nil_ #nil)
+(set-symbol-value! t_ #t)
+
+(define (make-string s) s)
+
;;; Define a predefined macro for use in the function-slot module.
(define (make-id template-id . data)
(syntax-case x ()
((_ name args body ...)
(with-syntax ((scheme-name (make-id #'name 'compile- #'name)))
- #'(define scheme-name
- (cons 'special-operator (lambda args body ...))))))))
+ #'(begin
+ (define scheme-name
+ (cons 'special-operator (lambda args body ...)))
+ (set-symbol-function! 'name scheme-name)))))))
HCoop / bpt / guile.git / blobdiff