-/* Copyright (C) 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1998,1999,2000,2001 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
+
+
\f
-#include "_scm.h"
-#include "eval.h"
-#include "macros.h"
+#include "libguile/_scm.h"
+#include "libguile/eval.h"
+#include "libguile/macros.h"
+#include "libguile/modules.h"
+#include "libguile/fluids.h"
-#include "evalext.h"
+#include "libguile/validate.h"
+#include "libguile/evalext.h"
-SCM_PROC (s_definedp, "defined?", 1, 0, 0, scm_definedp);
+SCM_SYMBOL (scm_sym_setter, "setter");
SCM
-scm_definedp (sym)
- SCM sym;
+scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED)
{
- SCM vcell;
+ SCM x = SCM_CDR (xorig);
+ SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x);
+ if (SCM_SYMBOLP (SCM_CAR (x)))
+ return scm_cons (SCM_IM_SET_X, x);
+ else if (SCM_CONSP (SCM_CAR (x)))
+ return scm_cons (scm_list_2 (scm_sym_setter, SCM_CAAR (x)),
+ scm_append (scm_list_2 (SCM_CDAR (x), SCM_CDR (x))));
+ else
+ scm_misc_error (scm_s_set_x, scm_s_variable, SCM_EOL);
+}
- if (SCM_ISYMP (sym))
- return SCM_BOOL_T;
+SCM_DEFINE (scm_definedp, "defined?", 1, 1, 0,
+ (SCM sym, SCM env),
+ "Return @code{#t} if @var{sym} is defined in the lexical "
+ "environment @var{env}. When @var{env} is not specified, "
+ "look in the top-level environment as defined by the "
+ "current module.")
+#define FUNC_NAME s_scm_definedp
+{
+ SCM var;
- SCM_ASSERT (SCM_NIMP (sym) && SCM_SYMBOLP (sym), sym, SCM_ARG1, s_definedp);
+ SCM_VALIDATE_SYMBOL (1, sym);
- vcell = scm_sym2vcell(sym,
- SCM_CDR (scm_top_level_lookup_closure_var),
- SCM_BOOL_F);
- return (vcell == SCM_BOOL_F || SCM_UNBNDP(SCM_CDR(vcell))) ?
- SCM_BOOL_F : SCM_BOOL_T;
+ if (SCM_UNBNDP (env))
+ var = scm_sym2var (sym, scm_current_module_lookup_closure (),
+ SCM_BOOL_F);
+ else
+ {
+ SCM frames = env;
+ register SCM b;
+ for (; SCM_NIMP (frames); frames = SCM_CDR (frames))
+ {
+ SCM_ASSERT (SCM_CONSP (frames), env, SCM_ARG2, FUNC_NAME);
+ b = SCM_CAR (frames);
+ if (SCM_NFALSEP (scm_procedure_p (b)))
+ break;
+ SCM_ASSERT (SCM_CONSP (b), env, SCM_ARG2, FUNC_NAME);
+ for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b))
+ {
+ if (SCM_NCONSP (b))
+ {
+ if (SCM_EQ_P (b, sym))
+ return SCM_BOOL_T;
+ else
+ break;
+ }
+ if (SCM_EQ_P (SCM_CAR (b), sym))
+ return SCM_BOOL_T;
+ }
+ }
+ var = scm_sym2var (sym,
+ SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F,
+ SCM_BOOL_F);
+ }
+
+ return (SCM_FALSEP (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
+ ? SCM_BOOL_F
+ : SCM_BOOL_T);
}
+#undef FUNC_NAME
-static char s_undefine[] = "undefine";
+
+SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine);
SCM
-scm_m_undefine (x, env)
- SCM x, env;
+scm_m_undefine (SCM x, SCM env)
{
SCM arg1 = x;
x = SCM_CDR (x);
- SCM_ASSYNT (SCM_TOP_LEVEL (env), arg1, "bad placement ", s_undefine);
- SCM_ASSYNT (SCM_NIMP (x) && SCM_CONSP (x) && SCM_CDR (x) == SCM_EOL,
- arg1, scm_s_expression, s_undefine);
+ SCM_ASSYNT (SCM_TOP_LEVEL (env), "bad placement ", s_undefine);
+ SCM_ASSYNT (SCM_CONSP (x) && SCM_NULLP (SCM_CDR (x)),
+ scm_s_expression, s_undefine);
x = SCM_CAR (x);
- SCM_ASSYNT (SCM_NIMP (x) && SCM_SYMBOLP (x), arg1, scm_s_variable, s_undefine);
- arg1 = scm_sym2vcell (x, scm_env_top_level (env), SCM_BOOL_F);
- SCM_ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_CDR (arg1)),
- x, "variable already unbound ", s_undefine);
-#if 0
-#ifndef SCM_RECKLESS
- if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == x))
- scm_warn ("undefining built-in ", SCM_CHARS (x));
- else
-#endif
- if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1))
- scm_warn ("redefining ", SCM_CHARS (x));
-#endif
- SCM_SETCDR (arg1, SCM_UNDEFINED);
+ SCM_ASSYNT (SCM_SYMBOLP (x), scm_s_variable, s_undefine);
+ arg1 = scm_sym2var (x, scm_env_top_level (env), SCM_BOOL_F);
+ SCM_ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_VARIABLE_REF (arg1)),
+ "variable already unbound ", s_undefine);
+ SCM_VARIABLE_SET (arg1, SCM_UNDEFINED);
#ifdef SICP
- return SCM_CAR (arg1);
+ return x;
#else
return SCM_UNSPECIFIED;
#endif
}
-static char s_sequence_to_list[] = "sequence->list";
-
-SCM
-scm_m_sequence_to_list (SCM x, SCM env)
-{
- SCM res = SCM_EOL;
- SCM_ASSYNT (SCM_NULLP (SCM_CDR (x))
- || (SCM_NIMP (SCM_CDR (x) && SCM_ECONSP (SCM_CDR (x)))),
- x, scm_s_expression, s_sequence_to_list);
- while (SCM_NNULLP (x = SCM_CDR (x)))
- res = scm_cons (SCM_XEVALCAR (x, env), res);
- return res;
-}
-
-SCM_PROC (s_serial_map, "serial-map", 2, 0, 1, scm_map);
+SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
void
scm_init_evalext ()
{
- scm_make_synt (s_undefine, scm_makacro, scm_m_undefine);
- scm_make_synt (s_sequence_to_list, scm_makacro, scm_m_sequence_to_list);
-#include "evalext.x"
+ scm_make_synt (scm_s_set_x, scm_makmmacro, scm_m_generalized_set_x);
+#include "libguile/evalext.x"
}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff