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local-eval on syntax-local-binding, bound-identifiers
From: |
Andy Wingo |
Subject: |
local-eval on syntax-local-binding, bound-identifiers |
Date: |
Sun, 15 Jan 2012 23:17:37 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) |
Hi Mark,
I had made some noise about preferring an implementation of local-eval
based on primitives from psyntax. But, I didn't clarify my argument by
providing the primitives. Here are some patches that provide
syntax-local-binding, as I noted in my previous mail, and also a
procedure to get all identifiers that are visible within the scope of
another identifier.
I then refactored your patch to implement local-eval entirely in terms
of these primitives and other normal macrology. What do you think? In
the interests of time and debugging, I removed the support for pattern
variables; it should be easy to add back.
These are preliminary patches, but if this approach proves to be viable,
I would prefer it to one that bakes the-environment into psyntax.
WDYT?
Regards,
Andy
>From 48d8e52e316984f2bf9380df85079bb5fa142253 Mon Sep 17 00:00:00 2001
From: Andy Wingo <address@hidden>
Date: Sun, 15 Jan 2012 17:51:02 +0100
Subject: [PATCH 1/3] add syntax-local-binding
* module/ice-9/boot-9.scm (syntax-local-binding): New binding.
* module/ice-9/psyntax.scm: Locally define a fluid that holds the
"transformer environment". with-transformer-environment calls a
procedure with the transformer environment, or raises an error if
called outside the extent of a transformer. Bind
transformer-environment in expand-macro.
(syntax-local-binding): New procedure to return binding information of
a lexically bound identifier (a lexical, local macro, a pattern
variable, or a displaced lexical).
---
module/ice-9/boot-9.scm | 1 +
module/ice-9/psyntax.scm | 39 +++++++++++++++++++++++++++++++++++++--
2 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index f661d08..9cdd8d1 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -389,6 +389,7 @@ If there is no handler at all, Guile prints an error and
then exits."
(define generate-temporaries #f)
(define bound-identifier=? #f)
(define free-identifier=? #f)
+(define syntax-local-binding #f)
;; $sc-dispatch is an implementation detail of psyntax. It is used by
;; expanded macros, to dispatch an input against a set of patterns.
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 1bf3c32..30685bc 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -786,6 +786,14 @@
id))))))
(else (syntax-violation 'id-var-name "invalid id" id)))))
+ (define transformer-environment
+ (make-fluid
+ (lambda (k)
+ (error "called outside the dynamic extent of a syntax transformer"))))
+
+ (define (with-transformer-environment k)
+ ((fluid-ref transformer-environment) k))
+
;; free-id=? must be passed fully wrapped ids since (free-id=? x y)
;; may be true even if (free-id=? (wrap x w) (wrap y w)) is not.
@@ -1321,8 +1329,10 @@
(syntax-violation #f "encountered raw symbol in macro
output"
(source-wrap e w (wrap-subst w) mod) x))
(else (decorate-source x s)))))
- (rebuild-macro-output (p (source-wrap e (anti-mark w) s mod))
- (new-mark))))
+ (with-fluids ((transformer-environment
+ (lambda (k) (k e r w s rib mod))))
+ (rebuild-macro-output (p (source-wrap e (anti-mark w) s mod))
+ (new-mark)))))
(define expand-body
;; In processing the forms of the body, we create a new, empty wrap.
@@ -2435,6 +2445,31 @@
(set! syntax-source
(lambda (x) (source-annotation x)))
+ (set! syntax-local-binding
+ (lambda (id)
+ (arg-check nonsymbol-id? id 'syntax-local-value)
+ (with-transformer-environment
+ (lambda (e r w s rib mod)
+ (define (strip-anti-mark w)
+ (let ((ms (wrap-marks w)) (s (wrap-subst w)))
+ (if (and (pair? ms) (eq? (car ms) the-anti-mark))
+ ;; output is from original text
+ (make-wrap (cdr ms) (if rib (cons rib (cdr s)) (cdr s)))
+ ;; output introduced by macro
+ (make-wrap ms (if rib (cons rib s) s)))))
+ (let ((label (id-var-name (syntax-object-expression id)
+ (strip-anti-mark (syntax-object-wrap
id)))))
+ (if (not (string? label))
+ (error "identifier not lexically bound" id))
+ (let ((b (assq-ref r label)))
+ (if b
+ (case (binding-type b)
+ ((lexical) (values 'lexical (binding-value b)))
+ ((macro) (values 'local-macro (binding-value b)))
+ ((syntax) (values 'pattern-variable (binding-value
b)))
+ (else (error "unpossible!" b)))
+ (values 'displaced-lexical #f))))))))
+
(set! generate-temporaries
(lambda (ls)
(arg-check list? ls 'generate-temporaries)
--
1.7.8.3
>From 2c3da44320019453115811af386febaa7eb241c3 Mon Sep 17 00:00:00 2001
From: Andy Wingo <address@hidden>
Date: Sun, 15 Jan 2012 18:39:44 +0100
Subject: [PATCH 2/3] add bound-identifiers
* module/ice-9/boot-9.scm (bound-identifiers): Declare variable.
* module/ice-9/psyntax.scm: Add all-bound-identifiers helper, and define
bound-identifiers. The identifiers are anti-marked so that syntax
transformers can introduce them, as-is.
---
module/ice-9/boot-9.scm | 1 +
module/ice-9/psyntax.scm | 49 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/module/ice-9/boot-9.scm b/module/ice-9/boot-9.scm
index 9cdd8d1..b8aa842 100644
--- a/module/ice-9/boot-9.scm
+++ b/module/ice-9/boot-9.scm
@@ -389,6 +389,7 @@ If there is no handler at all, Guile prints an error and
then exits."
(define generate-temporaries #f)
(define bound-identifier=? #f)
(define free-identifier=? #f)
+(define bound-identifiers #f)
(define syntax-local-binding #f)
;; $sc-dispatch is an implementation detail of psyntax. It is used by
diff --git a/module/ice-9/psyntax.scm b/module/ice-9/psyntax.scm
index 30685bc..25543e0 100644
--- a/module/ice-9/psyntax.scm
+++ b/module/ice-9/psyntax.scm
@@ -786,6 +786,48 @@
id))))))
(else (syntax-violation 'id-var-name "invalid id" id)))))
+ ;;
+ ;; all-bound-identifiers returns a list of all lexically bound
+ ;; identifiers, as syntax objects. They are in order from outer to
+ ;; inner.
+ ;;
+ (define all-bound-identifiers
+ (lambda (w mod)
+ (define scan
+ (lambda (subst results)
+ (if (null? subst)
+ results
+ (let ((fst (car subst)))
+ (if (eq? fst 'shift)
+ (scan (cdr subst) results)
+ (let ((symnames (ribcage-symnames fst))
+ (marks (ribcage-marks fst)))
+ (if (vector? symnames)
+ (scan-vector-rib subst symnames marks results)
+ (scan-list-rib subst symnames marks results))))))))
+ (define scan-list-rib
+ (lambda (subst symnames marks results)
+ (let f ((symnames symnames) (marks marks) (results results))
+ (if (null? symnames)
+ (scan (cdr subst) results)
+ (f (cdr symnames) (cdr marks)
+ (cons (wrap (car symnames)
+ (anti-mark (make-wrap (car marks) subst))
+ mod)
+ results))))))
+ (define scan-vector-rib
+ (lambda (subst symnames marks results)
+ (let ((n (vector-length symnames)))
+ (let f ((i 0) (results results))
+ (if (fx= i n)
+ (scan (cdr subst) results)
+ (f (fx+ i 1)
+ (cons (wrap (vector-ref symnames i)
+ (anti-mark (make-wrap (vector-ref marks i)
subst))
+ mod)
+ results)))))))
+ (scan (wrap-subst w) '())))
+
(define transformer-environment
(make-fluid
(lambda (k)
@@ -2470,6 +2512,13 @@
(else (error "unpossible!" b)))
(values 'displaced-lexical #f))))))))
+ (set! bound-identifiers
+ (lambda (x)
+ (arg-check nonsymbol-id? x 'bound-identifiers)
+ (reverse
+ (all-bound-identifiers (syntax-object-wrap x)
+ (syntax-object-module x)))))
+
(set! generate-temporaries
(lambda (ls)
(arg-check list? ls 'generate-temporaries)
--
1.7.8.3
>From ddea51310227155e3771c3e6acbbecf24dc74c42 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <address@hidden>
Date: Tue, 3 Jan 2012 04:02:08 -0500
Subject: [PATCH 3/3] Implement `local-eval', `local-compile', and
`the-environment'
* module/ice-9/local-eval.scm: New module (ice-9 local-eval) which
exports `the-environment', `local-eval', and `local-compile'.
* libguile/debug.c (scm_local_eval): New C function that calls the
Scheme implementation of `local-eval' in (ice-9 local-eval).
* libguile/debug.h (scm_local_eval): Add prototype.
* doc/ref/api-evaluation.texi (Local Evaluation): Add documentation.
* test-suite/tests/eval.test (local evaluation): Add tests.
* test-suite/standalone/test-loose-ends.c (test_scm_local_eval):
Add test.
* module/Makefile.am: Add ice-9/local-eval.scm.
---
doc/ref/api-evaluation.texi | 38 ++++++++
libguile/debug.c | 13 +++-
libguile/debug.h | 4 +-
module/Makefile.am | 5 +-
module/ice-9/local-eval.scm | 150 +++++++++++++++++++++++++++++++
test-suite/standalone/test-loose-ends.c | 16 +++-
test-suite/tests/eval.test | 79 ++++++++++++++++-
7 files changed, 298 insertions(+), 7 deletions(-)
create mode 100644 module/ice-9/local-eval.scm
diff --git a/doc/ref/api-evaluation.texi b/doc/ref/api-evaluation.texi
index 2e48dcb..72dd4df 100644
--- a/doc/ref/api-evaluation.texi
+++ b/doc/ref/api-evaluation.texi
@@ -19,6 +19,7 @@ loading, evaluating, and compiling Scheme code at run time.
* Loading:: Loading Scheme code from file.
* Character Encoding of Source Files:: Loading non-ASCII Scheme code from file.
* Delayed Evaluation:: Postponing evaluation until it is needed.
+* Local Evaluation:: Evaluation in a local lexical environment.
@end menu
@@ -954,6 +955,43 @@ value.
@end deffn
address@hidden Local Evaluation
address@hidden Local Evaluation
+
address@hidden syntax the-environment
+Captures and returns a lexical environment for use with
address@hidden or @code{local-compile}.
address@hidden deffn
+
address@hidden {Scheme Procedure} local-eval exp env
address@hidden {C Function} scm_local_eval (exp, env)
+Evaluate the expression @var{exp} in the lexical environment @var{env}.
+This mostly behaves as if @var{exp} had been wrapped in a lambda
+expression @code{`(lambda () ,@var{exp})} and put in place of
address@hidden(the-environment)}, with the resulting procedure called by
address@hidden In other words, @var{exp} is evaluated within the
+lexical environment of @code{(the-environment)}, but within the dynamic
+environment of the call to @code{local-eval}.
address@hidden deffn
+
address@hidden {Scheme Procedure} local-compile exp env [opts=()]
+Compile the expression @var{exp} in the lexical environment @var{env}.
+If @var{exp} is a procedure, the result will be a compiled procedure;
+otherwise @code{local-compile} is mostly equivalent to
address@hidden @var{opts} specifies the compilation options.
address@hidden deffn
+
+Note that the current implementation of @code{(the-environment)} has
+some limitations. It does not capture local syntax transformers bound
+by @code{let-syntax}, @code{letrec-syntax} or non-top-level
address@hidden forms. Any attempt to reference such captured
+syntactic keywords via @code{local-eval} or @code{local-compile}
+produces an error. Also, @code{(the-environment)} does not capture
+lexical bindings that are shadowed by inner bindings with the same name,
+nor hidden lexical bindings produced by macro expansion, even though
+such bindings might be accessible using syntax objects.
+
+
@c Local Variables:
@c TeX-master: "guile.texi"
@c End:
diff --git a/libguile/debug.c b/libguile/debug.c
index 88a01d6..d41acc4 100644
--- a/libguile/debug.c
+++ b/libguile/debug.c
@@ -1,5 +1,5 @@
/* Debugging extensions for Guile
- * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2006, 2008,
2009, 2010, 2011 Free Software Foundation
+ * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2006, 2008,
2009, 2010, 2011, 2012 Free Software Foundation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -208,6 +208,17 @@ SCM_DEFINE (scm_debug_hang, "debug-hang", 0, 1, 0,
#undef FUNC_NAME
#endif
+SCM
+scm_local_eval (SCM exp, SCM env)
+{
+ static SCM local_eval_var = SCM_BOOL_F;
+
+ if (scm_is_false (local_eval_var))
+ local_eval_var = scm_c_module_lookup
+ (scm_c_resolve_module ("ice-9 local-eval"), "local-eval");
+ return scm_call_2 (SCM_VARIABLE_REF (local_eval_var), exp, env);
+}
+
static void
init_stack_limit (void)
{
diff --git a/libguile/debug.h b/libguile/debug.h
index d862aba..4155d19 100644
--- a/libguile/debug.h
+++ b/libguile/debug.h
@@ -3,7 +3,7 @@
#ifndef SCM_DEBUG_H
#define SCM_DEBUG_H
-/* Copyright (C) 1995,1996,1998,1999,2000,2001,2002,2004,2008,2009,2010
+/* Copyright (C) 1995,1996,1998,1999,2000,2001,2002,2004,2008,2009,2010,2012
* Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
@@ -41,6 +41,8 @@ typedef union scm_t_debug_info
+SCM_API SCM scm_local_eval (SCM exp, SCM env);
+
SCM_API SCM scm_reverse_lookup (SCM env, SCM data);
SCM_API SCM scm_procedure_source (SCM proc);
SCM_API SCM scm_procedure_name (SCM proc);
diff --git a/module/Makefile.am b/module/Makefile.am
index 56fa48d..9c9d8ed 100644
--- a/module/Makefile.am
+++ b/module/Makefile.am
@@ -1,6 +1,6 @@
## Process this file with automake to produce Makefile.in.
##
-## Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
+## Copyright (C) 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
##
## This file is part of GUILE.
##
@@ -243,7 +243,8 @@ ICE_9_SOURCES = \
ice-9/weak-vector.scm \
ice-9/list.scm \
ice-9/serialize.scm \
- ice-9/vlist.scm
+ ice-9/vlist.scm \
+ ice-9/local-eval.scm
SRFI_SOURCES = \
srfi/srfi-1.scm \
diff --git a/module/ice-9/local-eval.scm b/module/ice-9/local-eval.scm
new file mode 100644
index 0000000..cb74881
--- /dev/null
+++ b/module/ice-9/local-eval.scm
@@ -0,0 +1,150 @@
+;;; -*- mode: scheme; coding: utf-8; -*-
+;;;
+;;; Copyright (C) 2012 Free Software Foundation, Inc.
+;;;
+;;; This library is free software; you can redistribute it and/or
+;;; modify it under the terms of the GNU Lesser General Public
+;;; License as published by the Free Software Foundation; either
+;;; version 3 of the License, or (at your option) any later version.
+;;;
+;;; This library is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;; Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with this library; if not, write to the Free Software
+;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
+
+(define-module (ice-9 local-eval)
+ #:use-module (ice-9 format)
+ #:use-module (srfi srfi-9)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (system base compile)
+ #:export (the-environment local-eval local-compile))
+
+(define-record-type lexical-environment-type
+ (make-lexical-environment module wrapper boxes)
+ lexical-environment?
+ (module lexenv-module)
+ (wrapper lexenv-wrapper)
+ (boxes lexenv-boxes))
+
+(set-record-type-printer!
+ lexical-environment-type
+ (lambda (e port)
+ (format port "#<lexical-environment ~S (~S bindings)>"
+ (module-name (lexenv-module e)) (length (lexenv-boxes e)))))
+
+(define-syntax-rule (make-box v)
+ (case-lambda
+ (() v)
+ ((x) (set! v x))))
+
+(define-syntax let*-syntax
+ (syntax-rules ()
+ ((_ () e e* ...)
+ (begin e e* ...))
+ ((_ ((id trans) (id* trans*) ...) e e* ...)
+ (let-syntax ((id trans))
+ (let*-syntax ((id* trans*) ...)
+ e e* ...)))))
+
+(define-syntax-rule (identifier-syntax-from-box box)
+ (make-transformer-from-box
+ (syntax-object-of box)
+ (identifier-syntax (id (box))
+ ((set! id x) (box x)))))
+
+(define-syntax syntax-object-of
+ (lambda (form)
+ (syntax-case form ()
+ ((_ x) #`(quote #,(datum->syntax #'x #'x))))))
+
+(define (make-transformer-from-box id trans)
+ (set-procedure-property! trans 'identifier-syntax-box id)
+ trans)
+
+(define (unsupported-binding name)
+ (make-variable-transformer
+ (lambda (x)
+ (syntax-violation
+ 'local-eval
+ "unsupported binding captured by (the-environment)"
+ x))))
+
+(define (partition-identifiers ids)
+ (let lp ((ids ids) (lexical '()) (other '()))
+ (if (null? ids)
+ (values lexical other)
+ (call-with-values (lambda () (syntax-local-binding (car ids)))
+ (lambda (type val)
+ (cond
+ ((eq? type 'lexical)
+ (lp (cdr ids)
+ (acons (car ids) (datum->syntax #'here (gensym))
+ lexical)
+ other))
+ ((and (eq? type 'local-macro)
+ (procedure-property val 'identifier-syntax-box))
+ => (lambda (id)
+ (lp (cdr ids)
+ (acons (car ids) id lexical)
+ other)))
+ (else
+ (lp (cdr ids) lexical (cons (car ids) other)))))))))
+
+(define-syntax the-environment
+ (lambda (x)
+ (syntax-case x ()
+ ((the-environment)
+ #'(the-environment the-environment))
+ ((the-environment scope)
+ (call-with-values (lambda ()
+ (partition-identifiers (bound-identifiers #'scope)))
+ (lambda (lexical other)
+ (with-syntax ((module (datum->syntax #'here (module-name
(current-module))))
+ (((v . t) ...) lexical)
+ ((u ...) other))
+ #'(make-lexical-environment
+ (resolve-module 'module)
+ (lambda (exp)
+ (with-syntax ((exp (datum->syntax #'scope exp)))
+ #'(lambda (t ...)
+ (let*-syntax ((v (identifier-syntax-from-box t))
+ ...
+ (u (unsupported-binding 'u))
+ ...)
+ #f ; force expression context
+ exp))))
+ (list (make-box v) ...)))))))))
+
+(define (local-eval x e)
+ "Evaluate the expression @var{x} within the lexical environment @var{e}."
+ (cond ((lexical-environment? e)
+ (apply (eval ((lexenv-wrapper e) x) (lexenv-module e))
+ (lexenv-boxes e)))
+ ((module? e)
+ ;; Here we evaluate the expression within `lambda', and then
+ ;; call the resulting procedure outside of the dynamic extent
+ ;; of `eval'. We do this because `eval' sets (current-module)
+ ;; within its dynamic extent, and we don't want that. Also,
+ ;; doing it this way makes this a proper tail call.
+ ((eval #`(lambda () #,x) e)))
+ (else (error "local-eval: invalid lexical environment" e))))
+
+(define* (local-compile x e #:key (opts '()))
+ "Compile and evaluate the expression @var{x} within the lexical environment
@var{e}."
+ (cond ((lexical-environment? e)
+ (apply (compile ((lexenv-wrapper e) x)
+ #:env (lexenv-module e)
+ #:from 'scheme #:opts opts)
+ (lexenv-boxes e)))
+ ((module? e)
+ ;; Here we compile the expression within `lambda', and then
+ ;; call the resulting procedure outside of the dynamic extent
+ ;; of `compile'. We do this because `compile' sets
+ ;; (current-module) during evaluation, and we don't want that.
+ ((compile #`(lambda () #,x)
+ #:env e #:from 'scheme #:opts opts)))
+ (else (error "local-compile: invalid lexical environment" e))))
diff --git a/test-suite/standalone/test-loose-ends.c
b/test-suite/standalone/test-loose-ends.c
index 2fdbe7d..f815ae2 100644
--- a/test-suite/standalone/test-loose-ends.c
+++ b/test-suite/standalone/test-loose-ends.c
@@ -3,7 +3,7 @@
* Test items of the Guile C API that aren't covered by any other tests.
*/
-/* Copyright (C) 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2009, 2012 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -43,9 +43,23 @@ test_scm_from_locale_keywordn ()
}
static void
+test_scm_local_eval ()
+{
+ SCM result = scm_local_eval
+ (scm_list_3 (scm_from_latin1_symbol ("+"),
+ scm_from_latin1_symbol ("x"),
+ scm_from_latin1_symbol ("y")),
+ scm_c_eval_string ("(let ((x 1) (y 2)) (the-environment))"));
+
+ assert (scm_is_true (scm_equal_p (result,
+ scm_from_signed_integer (3))));
+}
+
+static void
tests (void *data, int argc, char **argv)
{
test_scm_from_locale_keywordn ();
+ test_scm_local_eval ();
}
int
diff --git a/test-suite/tests/eval.test b/test-suite/tests/eval.test
index a128cd7..73f9140 100644
--- a/test-suite/tests/eval.test
+++ b/test-suite/tests/eval.test
@@ -1,5 +1,5 @@
;;;; eval.test --- tests guile's evaluator -*- scheme -*-
-;;;; Copyright (C) 2000, 2001, 2006, 2007, 2009, 2010, 2011 Free Software
Foundation, Inc.
+;;;; Copyright (C) 2000, 2001, 2006, 2007, 2009, 2010, 2011, 2012 Free
Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@@ -19,7 +19,8 @@
:use-module (test-suite lib)
:use-module ((srfi srfi-1) :select (unfold count))
:use-module ((system vm vm) :select (make-vm call-with-vm))
- :use-module (ice-9 documentation))
+ :use-module (ice-9 documentation)
+ :use-module (ice-9 local-eval))
(define exception:bad-expression
@@ -422,4 +423,78 @@
(thunk (let loop () (cons 's (loop)))))
(call-with-vm vm thunk))))
+;;;
+;;; local-eval
+;;;
+
+(with-test-prefix "local evaluation"
+
+ (pass-if "local-eval"
+
+ (let* ((env1 (let ((x 1) (y 2) (z 3))
+ (define-syntax-rule (foo x) (quote x))
+ (the-environment)))
+ (env2 (local-eval '(let ((x 111) (a 'a))
+ (define-syntax-rule (bar x) (quote x))
+ (the-environment))
+ env1)))
+ (local-eval '(set! x 11) env1)
+ (local-eval '(set! y 22) env1)
+ (local-eval '(set! z 33) env2)
+ (and (equal? (local-eval '(list x y z) env1)
+ '(11 22 33))
+ (equal? (local-eval '(list x y z a) env2)
+ '(111 22 33 a)))))
+
+ (pass-if "local-compile"
+
+ (let* ((env1 (let ((x 1) (y 2) (z 3))
+ (define-syntax-rule (foo x) (quote x))
+ (the-environment)))
+ (env2 (local-compile '(let ((x 111) (a 'a))
+ (define-syntax-rule (bar x) (quote x))
+ (the-environment))
+ env1)))
+ (local-compile '(set! x 11) env1)
+ (local-compile '(set! y 22) env1)
+ (local-compile '(set! z 33) env2)
+ (and (equal? (local-compile '(list x y z) env1)
+ '(11 22 33))
+ (equal? (local-compile '(list x y z a) env2)
+ '(111 22 33 a)))))
+
+ (pass-if "the-environment within a macro"
+
+ (let ()
+ (define-syntax-rule (test)
+ (let ((x 1) (y 2))
+ (the-environment)))
+ (let ((env (let ((x 111) (y 222))
+ (test))))
+ (equal? (local-eval '(list x y) env)
+ '(1 2)))))
+
+ (pass-if "mixed primitive-eval, local-eval and local-compile"
+
+ (let* ((env1 (primitive-eval '(let ((x 1) (y 2) (z 3))
+ (define-syntax-rule (foo x) (quote x))
+ (the-environment))))
+ (env2 (local-eval '(let ((x 111) (a 'a))
+ (define-syntax-rule (bar x) (quote x))
+ (the-environment))
+ env1))
+ (env3 (local-compile '(let ((y 222) (b 'b))
+ (the-environment))
+ env2)))
+ (local-eval '(set! x 11) env1)
+ (local-compile '(set! y 22) env2)
+ (local-eval '(set! z 33) env2)
+ (local-compile '(set! a (* y 2)) env3)
+ (and (equal? (local-compile '(list x y z) env1)
+ '(11 22 33))
+ (equal? (local-eval '(list x y z a) env2)
+ '(111 22 33 444))
+ (equal? (local-eval '(list x y z a b) env3)
+ '(111 222 33 444 b))))))
+
;;; eval.test ends here
--
1.7.8.3
--
http://wingolog.org/
- local-eval on syntax-local-binding, bound-identifiers,
Andy Wingo <=
- Re: local-eval on syntax-local-binding, bound-identifiers, Mark H Weaver, 2012/01/15
- Re: local-eval on syntax-local-binding, bound-identifiers, Andy Wingo, 2012/01/16
- Re: local-eval on syntax-local-binding, bound-identifiers, Mark H Weaver, 2012/01/16
- Re: local-eval on syntax-local-binding, bound-identifiers, Andy Wingo, 2012/01/16
- Re: local-eval on syntax-local-binding, bound-identifiers, Mark H Weaver, 2012/01/16
- Re: local-eval on syntax-local-binding, bound-identifiers, Andy Wingo, 2012/01/16
- Re: local-eval on syntax-local-binding, bound-identifiers, David Kastrup, 2012/01/17
- Re: local-eval on syntax-local-binding, bound-identifiers, Andy Wingo, 2012/01/19