-/* 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
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * 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 "libguile/_scm.h"
-#include "libguile/eval.h"
-#include "libguile/macros.h"
-#include "libguile/modules.h"
-#include "libguile/fluids.h"
-
-#include "libguile/validate.h"
-#include "libguile/evalext.h"
-
-SCM_SYMBOL (scm_sym_setter, "setter");
-
-SCM
-scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED)
-{
- 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);
-}
-
-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_VALIDATE_SYMBOL (1,sym);
-
- 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
-
-
-SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine);
-
-SCM
-scm_m_undefine (SCM x, SCM env)
-{
- SCM arg1 = x;
- x = SCM_CDR (x);
- 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_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 x;
-#else
- return SCM_UNSPECIFIED;
-#endif
-}
-
-SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
-
-void
-scm_init_evalext ()
-{
- 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:
-*/
+/* Copyright (C) 1998,1999,2000,2001,2002,2003, 2006, 2008, 2009 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
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+#include "libguile/eval.h"
+#include "libguile/fluids.h"
+#include "libguile/modules.h"
+
+#include "libguile/validate.h"
+#include "libguile/evalext.h"
+
+SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0,
+ (SCM sym, SCM module),
+ "Return @code{#t} if @var{sym} is defined in the module "
+ "@var{module} or the current module when @var{module} is not"
+ "specified.")
+#define FUNC_NAME s_scm_defined_p
+{
+ SCM var;
+
+ SCM_VALIDATE_SYMBOL (1, sym);
+
+ if (SCM_UNBNDP (module))
+ module = scm_current_module ();
+ else
+ SCM_VALIDATE_MODULE (2, module);
+
+ var = scm_module_variable (module, sym);
+
+ return (scm_is_false (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
+ ? SCM_BOOL_F
+ : SCM_BOOL_T);
+}
+#undef FUNC_NAME
+
+
+SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
+
+
+SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
+ (SCM obj),
+ "Return #t for objects which Guile considers self-evaluating")
+#define FUNC_NAME s_scm_self_evaluating_p
+{
+ switch (SCM_ITAG3 (obj))
+ {
+ case scm_tc3_int_1:
+ case scm_tc3_int_2:
+ /* inum */
+ return SCM_BOOL_T;
+ case scm_tc3_imm24:
+ /* characters, booleans, other immediates */
+ return scm_from_bool (!scm_is_null (obj));
+ case scm_tc3_cons:
+ switch (SCM_TYP7 (obj))
+ {
+ case scm_tc7_vector:
+ case scm_tc7_wvect:
+ case scm_tc7_hashtable:
+ case scm_tc7_number:
+ case scm_tc7_string:
+ case scm_tc7_smob:
+ case scm_tc7_pws:
+ case scm_tc7_program:
+ case scm_tc7_bytevector:
+ case scm_tc7_gsubr:
+ case scm_tcs_struct:
+ return SCM_BOOL_T;
+ default:
+ return SCM_BOOL_F;
+ }
+ }
+ SCM_MISC_ERROR ("Internal error: Object ~S has unknown type",
+ scm_list_1 (obj));
+ return SCM_UNSPECIFIED; /* never reached */
+}
+#undef FUNC_NAME
+
+void
+scm_init_evalext ()
+{
+#include "libguile/evalext.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff