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* eval.c (unmemocar, sym_three_question_marks, scm_unmemocar):

Browse source 
Grouped together with unmemocopy, without modifications.

	(build_binding_list, unmemocopy): Renamed names of list arguments
	and variables to reflect the actual order of the list elements.
This commit is contained in:
Dirk Herrmann 2003-10-25 07:00:50 +00:00
parent 70c1c10864
commit 60a4984209
2 changed files with 62 additions and 52 deletions
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8
libguile/ChangeLog
View file

@ -1,3 +1,11 @@
2003-10-25 Dirk Herrmann <D.Herrmann@tu-bs.de>
* eval.c (unmemocar, sym_three_question_marks, scm_unmemocar):
Grouped together with unmemocopy, without modifications.
(build_binding_list, unmemocopy): Renamed names of list arguments
and variables to reflect the actual order of the list elements.
2003-10-22 Dirk Herrmann <D.Herrmann@tu-bs.de>
* eval.c (s_defun): New static identifier.

106
libguile/eval.c
View file

@ -633,40 +633,6 @@ literal_p (const SCM symbol, const SCM env)
return 0;
}
#define unmemocar scm_unmemocar
SCM_SYMBOL (sym_three_question_marks, "???");
SCM
scm_unmemocar (SCM form, SCM env)
{
if (!SCM_CONSP (form))
return form;
else
{
SCM c = SCM_CAR (form);
if (SCM_VARIABLEP (c))
{
SCM sym = scm_module_reverse_lookup (scm_env_module (env), c);
if (SCM_FALSEP (sym))
sym = sym_three_question_marks;
SCM_SETCAR (form, sym);
}
else if (SCM_ILOCP (c))
{
unsigned long int ir;
for (ir = SCM_IFRAME (c); ir != 0; --ir)
env = SCM_CDR (env);
env = SCM_CAAR (env);
for (ir = SCM_IDIST (c); ir != 0; --ir)
env = SCM_CDR (env);
SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env));
}
return form;
}
}
SCM
scm_eval_car (SCM pair, SCM env)
@ -1925,6 +1891,7 @@ static SCM f_apply;
/* An endless list consisting of #<undefined> objects: */
static SCM undefineds;
/* scm_unmemocopy takes a memoized expression together with its
* environment and rewrites it to its original form. Thus, it is the
* inversion of the rewrite rules above. The procedure is not
@ -1941,19 +1908,54 @@ static SCM undefineds;
*/
static SCM
build_binding_list (SCM names, SCM inits)
build_binding_list (SCM rnames, SCM rinits)
{
SCM bindings = SCM_EOL;
while (!SCM_NULLP (names))
while (!SCM_NULLP (rnames))
{
SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits));
SCM binding = scm_list_2 (SCM_CAR (rnames), SCM_CAR (rinits));
bindings = scm_cons (binding, bindings);
names = SCM_CDR (names);
inits = SCM_CDR (inits);
rnames = SCM_CDR (rnames);
rinits = SCM_CDR (rinits);
}
return bindings;
}
SCM_SYMBOL (sym_three_question_marks, "???");
#define unmemocar scm_unmemocar
SCM
scm_unmemocar (SCM form, SCM env)
{
if (!SCM_CONSP (form))
return form;
else
{
SCM c = SCM_CAR (form);
if (SCM_VARIABLEP (c))
{
SCM sym = scm_module_reverse_lookup (scm_env_module (env), c);
if (SCM_FALSEP (sym))
sym = sym_three_question_marks;
SCM_SETCAR (form, sym);
}
else if (SCM_ILOCP (c))
{
unsigned long int ir;
for (ir = SCM_IFRAME (c); ir != 0; --ir)
env = SCM_CDR (env);
env = SCM_CAAR (env);
for (ir = SCM_IDIST (c); ir != 0; --ir)
env = SCM_CDR (env);
SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env));
}
return form;
}
}
static SCM
unmemocopy (SCM x, SCM env)
{
@ -2032,33 +2034,33 @@ unmemocopy (SCM x, SCM env)
/* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...),
* where nx is the name of a local variable, ix is an initializer for
* the local variable and by are the body clauses. */
SCM names, inits, bindings;
SCM rnames, rinits, bindings;
x = SCM_CDR (x);
names = SCM_CAR (x);
rnames = SCM_CAR (x);
x = SCM_CDR (x);
inits = scm_reverse (unmemocopy (SCM_CAR (x), env));
env = SCM_EXTEND_ENV (names, SCM_EOL, env);
rinits = scm_reverse (unmemocopy (SCM_CAR (x), env));
env = SCM_EXTEND_ENV (rnames, SCM_EOL, env);
bindings = build_binding_list (names, inits);
bindings = build_binding_list (rnames, rinits);
z = scm_cons (bindings, SCM_UNSPECIFIED);
ls = scm_cons (scm_sym_let, z);
break;
}
case SCM_BIT7 (SCM_IM_LETREC):
{
/* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...),
* where nx is the name of a local variable, ix is an initializer for
/* format: (#@letrec (vn ... v2 v1) (i1 i2 ... in) b1 ...),
* where vx is the name of a local variable, ix is an initializer for
* the local variable and by are the body clauses. */
SCM names, inits, bindings;
SCM rnames, rinits, bindings;
x = SCM_CDR (x);
names = SCM_CAR (x);
env = SCM_EXTEND_ENV (names, SCM_EOL, env);
rnames = SCM_CAR (x);
env = SCM_EXTEND_ENV (rnames, SCM_EOL, env);
x = SCM_CDR (x);
inits = scm_reverse (unmemocopy (SCM_CAR (x), env));
rinits = scm_reverse (unmemocopy (SCM_CAR (x), env));
bindings = build_binding_list (names, inits);
bindings = build_binding_list (rnames, rinits);
z = scm_cons (bindings, SCM_UNSPECIFIED);
ls = scm_cons (scm_sym_letrec, z);
break;
@ -5166,7 +5168,7 @@ scm_init_eval ()
scm_permanent_object (f_apply);
#include "libguile/eval.x"
scm_add_feature ("delay");
}