-/* Copyright (C) 1995,1996,1997,1998 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. */
-
-/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
- gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
-
-\f
-
-#include "_scm.h"
-#include "smob.h"
-
-#include "scm_validate.h"
-#include "macros.h"
-
-long scm_tc16_macro;
-
-SCM_DEFINE (scm_makacro, "procedure->syntax", 1, 0, 0,
- (SCM code),
- "Returns a @dfn{macro} which, when a symbol defined to this value\n"
- "appears as the first symbol in an expression, returns the result\n"
- "of applying @var{code} to the expression and the environment.")
-#define FUNC_NAME s_scm_makacro
-{
- SCM_VALIDATE_PROC (1,code);
- SCM_RETURN_NEWSMOB (scm_tc16_macro, code);
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_makmacro, "procedure->macro", 1, 0, 0,
- (SCM code),
- "Returns a @dfn{macro} which, when a symbol defined to this value\n"
- "appears as the first symbol in an expression, evaluates the result\n"
- "of applying @var{code} to the expression and the environment.\n"
- "The value returned from @var{code} which has been passed to\n"
- "@code{procedure->memoizing-macro} replaces the form passed to\n"
- "@var{code}. For example:\n\n"
- "@example\n"
- "(define trace\n"
- " (procedure->macro\n"
- " (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x))))))\n\n"
- "(trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})).\n"
- "@end example\n")
-#define FUNC_NAME s_scm_makmacro
-{
- SCM_VALIDATE_PROC (1,code);
- SCM_RETURN_NEWSMOB (scm_tc16_macro | (1L << 16), code);
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_makmmacro, "procedure->memoizing-macro", 1, 0, 0,
- (SCM code),
- "Returns a @dfn{macro} which, when a symbol defined to this value\n"
- "appears as the first symbol in an expression, evaluates the result\n"
- "of applying @var{proc} to the expression and the environment.\n"
- "The value returned from @var{proc} which has been passed to\n"
- "@code{procedure->memoizing-macro} replaces the form passed to\n"
- "@var{proc}. For example:\n\n"
- "@example\n"
- "(define trace\n"
- " (procedure->macro\n"
- " (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x))))))\n\n"
- "(trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})).\n"
- "@end example\n")
-#define FUNC_NAME s_scm_makmmacro
-{
- SCM_VALIDATE_PROC (1,code);
- SCM_RETURN_NEWSMOB (scm_tc16_macro | (2L << 16), code);
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_macro_p, "macro?", 1, 0, 0,
- (SCM obj),
- "Return @code{#t} if @var{obj} is a regular macro, a memoizing macro or a\n"
- "syntax transformer.")
-#define FUNC_NAME s_scm_macro_p
-{
- return SCM_BOOL(SCM_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro);
-}
-#undef FUNC_NAME
-
-
-SCM_SYMBOL (scm_sym_syntax, "syntax");
-SCM_SYMBOL (scm_sym_macro, "macro");
-SCM_SYMBOL (scm_sym_mmacro, "macro!");
-
-SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0,
- (SCM m),
- "Return one of the symbols @code{syntax}, @code{macro} or @code{macro!},\n"
- "depending on whether @var{obj} is a syntax tranformer, a regular macro,\n"
- "or a memoizing macro, respectively. If @var{obj} is not a macro,\n"
- "@code{#f} is returned.")
-#define FUNC_NAME s_scm_macro_type
-{
- if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro))
- return SCM_BOOL_F;
- switch ((int) (SCM_CAR (m) >> 16))
- {
- case 0: return scm_sym_syntax;
- case 1: return scm_sym_macro;
- case 2: return scm_sym_mmacro;
- default: scm_wrong_type_arg (FUNC_NAME, 1, m);
- }
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_macro_name, "macro-name", 1, 0, 0,
- (SCM m),
- "")
-#define FUNC_NAME s_scm_macro_name
-{
- SCM_VALIDATE_SMOB (1,m,macro);
- return scm_procedure_name (SCM_CDR (m));
-}
-#undef FUNC_NAME
-
-
-SCM_DEFINE (scm_macro_transformer, "macro-transformer", 1, 0, 0,
- (SCM m),
- "")
-#define FUNC_NAME s_scm_macro_transformer
-{
- SCM_VALIDATE_SMOB (1,m,macro);
- return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F;
-}
-#undef FUNC_NAME
-
-SCM
-scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() )
-{
- SCM symcell = scm_sysintern (name, SCM_UNDEFINED);
- SCM transformer = scm_make_subr_opt (name, scm_tc7_subr_2, fcn, 0);
- SCM_SETCDR (symcell, macroizer (transformer));
- return SCM_CAR (symcell);
-}
-
-void
-scm_init_macros ()
-{
- scm_tc16_macro = scm_make_smob_type_mfpe ("macro", 0,
- scm_markcdr, NULL, NULL, NULL);
-#include "macros.x"
-}
+/* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003, 2006, 2008 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/alist.h" /* for SCM_EXTEND_ENV (well...) */
+#include "libguile/eval.h"
+#include "libguile/ports.h"
+#include "libguile/print.h"
+#include "libguile/root.h"
+#include "libguile/smob.h"
+#include "libguile/deprecation.h"
+
+#include "libguile/validate.h"
+#include "libguile/programs.h"
+#include "libguile/macros.h"
+
+#include "libguile/private-options.h"
+
+scm_t_bits scm_tc16_macro;
+
+
+static int
+macro_print (SCM macro, SCM port, scm_print_state *pstate)
+{
+ SCM code = SCM_MACRO_CODE (macro);
+ if (!SCM_CLOSUREP (code)
+ || scm_is_false (scm_procedure_p (SCM_PRINT_CLOSURE))
+ || scm_is_false (scm_printer_apply (SCM_PRINT_CLOSURE,
+ macro, port, pstate)))
+ {
+ scm_puts ("#<", port);
+
+ if (SCM_MACRO_TYPE (macro) < 4 && SCM_MACRO_IS_EXTENDED (macro))
+ scm_puts ("extended-", port);
+
+ if (!SCM_CLOSUREP (code) && !SCM_PROGRAM_P (code))
+ scm_puts ("primitive-", port);
+
+ if (SCM_MACRO_TYPE (macro) == 0)
+ scm_puts ("syntax", port);
+#if SCM_ENABLE_DEPRECATED == 1
+ if (SCM_MACRO_TYPE (macro) == 1)
+ scm_puts ("macro", port);
+#endif
+ if (SCM_MACRO_TYPE (macro) == 2)
+ scm_puts ("macro!", port);
+ if (SCM_MACRO_TYPE (macro) == 3)
+ scm_puts ("builtin-macro!", port);
+ if (SCM_MACRO_TYPE (macro) == 4)
+ scm_puts ("syncase-macro", port);
+
+ scm_putc (' ', port);
+ scm_iprin1 (scm_macro_name (macro), port, pstate);
+
+ if (SCM_CLOSUREP (code) && SCM_PRINT_SOURCE_P)
+ {
+ SCM formals = SCM_CLOSURE_FORMALS (code);
+ SCM env = SCM_ENV (code);
+ SCM xenv = SCM_EXTEND_ENV (formals, SCM_EOL, env);
+ SCM src = scm_i_unmemocopy_body (SCM_CODE (code), xenv);
+ scm_putc (' ', port);
+ scm_iprin1 (src, port, pstate);
+ }
+
+ if (SCM_MACRO_IS_EXTENDED (macro))
+ {
+ scm_putc (' ', port);
+ scm_write (SCM_SMOB_OBJECT_2 (macro), port);
+ scm_putc (' ', port);
+ scm_write (SCM_SMOB_OBJECT_3 (macro), port);
+ }
+
+ scm_putc ('>', port);
+ }
+
+ return 1;
+}
+
+static SCM
+macro_mark (SCM macro)
+{
+ if (SCM_MACRO_IS_EXTENDED (macro))
+ { scm_gc_mark (SCM_SMOB_OBJECT_2 (macro));
+ scm_gc_mark (SCM_SMOB_OBJECT_3 (macro));
+ }
+ return SCM_SMOB_OBJECT (macro);
+}
+
+static SCM
+makmac (SCM code, scm_t_bits flags)
+{
+ SCM z;
+ SCM_NEWSMOB (z, scm_tc16_macro, SCM_UNPACK (code));
+ SCM_SET_SMOB_FLAGS (z, flags);
+ return z;
+}
+
+/* Return a mmacro that is known to be one of guile's built in macros. */
+SCM
+scm_i_makbimacro (SCM code)
+#define FUNC_NAME "scm_i_makbimacro"
+{
+ SCM_VALIDATE_PROC (1, code);
+ return makmac (code, 3);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_makmmacro, "procedure->memoizing-macro", 1, 0, 0,
+ (SCM code),
+ "Return a @dfn{macro} which, when a symbol defined to this value\n"
+ "appears as the first symbol in an expression, evaluates the\n"
+ "result of applying @var{code} to the expression and the\n"
+ "environment.\n\n"
+ "@code{procedure->memoizing-macro} is the same as\n"
+ "@code{procedure->macro}, except that the expression returned by\n"
+ "@var{code} replaces the original macro expression in the memoized\n"
+ "form of the containing code.")
+#define FUNC_NAME s_scm_makmmacro
+{
+ SCM_VALIDATE_PROC (1, code);
+ return makmac (code, 2);
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_makacro, "procedure->syntax", 1, 0, 0,
+ (SCM code),
+ "Return a @dfn{macro} which, when a symbol defined to this value\n"
+ "appears as the first symbol in an expression, returns the\n"
+ "result of applying @var{code} to the expression and the\n"
+ "environment.")
+#define FUNC_NAME s_scm_makacro
+{
+ SCM_VALIDATE_PROC (1, code);
+ return makmac (code, 0);
+}
+#undef FUNC_NAME
+
+
+#if SCM_ENABLE_DEPRECATED == 1
+
+SCM_DEFINE (scm_makmacro, "procedure->macro", 1, 0, 0,
+ (SCM code),
+ "Return a @dfn{macro} which, when a symbol defined to this value\n"
+ "appears as the first symbol in an expression, evaluates the\n"
+ "result of applying @var{code} to the expression and the\n"
+ "environment. For example:\n"
+ "\n"
+ "@lisp\n"
+ "(define trace\n"
+ " (procedure->macro\n"
+ " (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x))))))\n\n"
+ "(trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})).\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_makmacro
+{
+ scm_c_issue_deprecation_warning
+ ("The function procedure->macro is deprecated, and so are"
+ " non-memoizing macros in general. Use memoizing macros"
+ " or r5rs macros instead.");
+
+ SCM_VALIDATE_PROC (1, code);
+ return makmac (code, 1);
+}
+#undef FUNC_NAME
+
+#endif
+
+SCM_DEFINE (scm_make_syncase_macro, "make-syncase-macro", 2, 0, 0,
+ (SCM type, SCM binding),
+ "Return a @dfn{macro} that requires expansion by syntax-case.\n"
+ "While users should not call this function, it is useful to know\n"
+ "that syntax-case macros are represented as Guile primitive macros.")
+#define FUNC_NAME s_scm_make_syncase_macro
+{
+ SCM z;
+ SCM_VALIDATE_SYMBOL (1, type);
+
+ SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_UNPACK (binding), SCM_UNPACK (type),
+ SCM_UNPACK (binding));
+ SCM_SET_SMOB_FLAGS (z, 4 | SCM_F_MACRO_EXTENDED);
+ return z;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_make_extended_syncase_macro, "make-extended-syncase-macro", 3, 0, 0,
+ (SCM m, SCM type, SCM binding),
+ "Extend a core macro @var{m} with a syntax-case binding.")
+#define FUNC_NAME s_scm_make_extended_syncase_macro
+{
+ SCM z;
+ SCM_VALIDATE_SMOB (1, m, macro);
+ SCM_VALIDATE_SYMBOL (2, type);
+
+ SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_SMOB_DATA (m), SCM_UNPACK (type),
+ SCM_UNPACK (binding));
+ SCM_SET_SMOB_FLAGS (z, SCM_SMOB_FLAGS (m) | SCM_F_MACRO_EXTENDED);
+ return z;
+}
+#undef FUNC_NAME
+
+
+
+SCM_DEFINE (scm_macro_p, "macro?", 1, 0, 0,
+ (SCM obj),
+ "Return @code{#t} if @var{obj} is a regular macro, a memoizing macro, a\n"
+ "syntax transformer, or a syntax-case macro.")
+#define FUNC_NAME s_scm_macro_p
+{
+ return scm_from_bool (SCM_SMOB_PREDICATE (scm_tc16_macro, obj));
+}
+#undef FUNC_NAME
+
+
+SCM_SYMBOL (scm_sym_syntax, "syntax");
+#if SCM_ENABLE_DEPRECATED == 1
+SCM_SYMBOL (scm_sym_macro, "macro");
+#endif
+SCM_SYMBOL (scm_sym_mmacro, "macro!");
+SCM_SYMBOL (scm_sym_bimacro, "builtin-macro!");
+SCM_SYMBOL (scm_sym_syncase_macro, "syncase-macro");
+
+SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0,
+ (SCM m),
+ "Return one of the symbols @code{syntax}, @code{macro},\n"
+ "@code{macro!}, or @code{syntax-case}, depending on whether\n"
+ "@var{m} is a syntax transformer, a regular macro, a memoizing\n"
+ "macro, or a syntax-case macro, respectively. If @var{m} is\n"
+ "not a macro, @code{#f} is returned.")
+#define FUNC_NAME s_scm_macro_type
+{
+ if (!SCM_SMOB_PREDICATE (scm_tc16_macro, m))
+ return SCM_BOOL_F;
+ switch (SCM_MACRO_TYPE (m))
+ {
+ case 0: return scm_sym_syntax;
+#if SCM_ENABLE_DEPRECATED == 1
+ case 1: return scm_sym_macro;
+#endif
+ case 2: return scm_sym_mmacro;
+ case 3: return scm_sym_bimacro;
+ case 4: return scm_sym_syncase_macro;
+ default: scm_wrong_type_arg (FUNC_NAME, 1, m);
+ }
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_macro_name, "macro-name", 1, 0, 0,
+ (SCM m),
+ "Return the name of the macro @var{m}.")
+#define FUNC_NAME s_scm_macro_name
+{
+ SCM_VALIDATE_SMOB (1, m, macro);
+ if (scm_is_true (scm_procedure_p (SCM_SMOB_OBJECT (m))))
+ return scm_procedure_name (SCM_SMOB_OBJECT (m));
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_macro_transformer, "macro-transformer", 1, 0, 0,
+ (SCM m),
+ "Return the transformer of the macro @var{m}.")
+#define FUNC_NAME s_scm_macro_transformer
+{
+ SCM data;
+
+ SCM_VALIDATE_SMOB (1, m, macro);
+ data = SCM_PACK (SCM_SMOB_DATA (m));
+
+ if (SCM_CLOSUREP (data) || SCM_PROGRAM_P (data))
+ return data;
+ else
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_syncase_macro_type, "syncase-macro-type", 1, 0, 0,
+ (SCM m),
+ "Return the type of the macro @var{m}.")
+#define FUNC_NAME s_scm_syncase_macro_type
+{
+ SCM_VALIDATE_SMOB (1, m, macro);
+
+ if (SCM_MACRO_IS_EXTENDED (m))
+ return SCM_SMOB_OBJECT_2 (m);
+ else
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_syncase_macro_binding, "syncase-macro-binding", 1, 0, 0,
+ (SCM m),
+ "Return the binding of the macro @var{m}.")
+#define FUNC_NAME s_scm_syncase_macro_binding
+{
+ SCM_VALIDATE_SMOB (1, m, macro);
+
+ if (SCM_MACRO_IS_EXTENDED (m))
+ return SCM_SMOB_OBJECT_3 (m);
+ else
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+SCM
+scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() )
+{
+ SCM var = scm_c_define (name, SCM_UNDEFINED);
+ SCM transformer = scm_c_make_subr (name, scm_tc7_subr_2, fcn);
+ SCM_VARIABLE_SET (var, macroizer (transformer));
+ return SCM_UNSPECIFIED;
+}
+
+void
+scm_init_macros ()
+{
+ scm_tc16_macro = scm_make_smob_type ("macro", 0);
+ scm_set_smob_mark (scm_tc16_macro, macro_mark);
+ scm_set_smob_print (scm_tc16_macro, macro_print);
+#include "libguile/macros.x"
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/