-/* Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1997,1998,2000,2001 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 "smob.h"
+#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 "macros.h"
+#include "libguile/validate.h"
+#include "libguile/macros.h"
-long scm_tc16_macro;
+scm_t_bits scm_tc16_macro;
-SCM_PROC(s_makacro, "procedure->syntax", 1, 0, 0, scm_makacro);
-SCM
-scm_makacro (code)
- SCM code;
+static int
+macro_print (SCM macro, SCM port, scm_print_state *pstate)
{
- SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
- code, SCM_ARG1, s_makacro);
- SCM_RETURN_NEWSMOB (scm_tc16_macro, code);
-}
+ SCM code = SCM_MACRO_CODE (macro);
+ if (!SCM_CLOSUREP (code)
+ || SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE))
+ || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE,
+ macro, port, pstate)))
+ {
+ if (!SCM_CLOSUREP (code))
+ scm_puts ("#<primitive-", port);
+ else
+ scm_puts ("#<", port);
+
+ if (SCM_MACRO_TYPE (macro) == 0)
+ scm_puts ("syntax", port);
+ else if (SCM_MACRO_TYPE (macro) == 1)
+ scm_puts ("macro", port);
+ if (SCM_MACRO_TYPE (macro) == 2)
+ scm_puts ("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_unmemocopy (SCM_CODE (code), xenv);
+ scm_putc (' ', port);
+ scm_iprin1 (src, port, pstate);
+ }
+
+ scm_putc ('>', port);
+ }
+ return 1;
+}
-SCM_PROC(s_makmacro, "procedure->macro", 1, 0, 0, scm_makmacro);
-SCM
-scm_makmacro (code)
- SCM code;
+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_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
- code, SCM_ARG1, s_makmacro);
- SCM_RETURN_NEWSMOB (scm_tc16_macro | (1L << 16), code);
+ SCM_VALIDATE_PROC (1,code);
+ SCM_RETURN_NEWSMOB (scm_tc16_macro, SCM_UNPACK (code));
}
-
-
-SCM_PROC(s_makmmacro, "procedure->memoizing-macro", 1, 0, 0, scm_makmmacro);
-
-SCM
-scm_makmmacro (code)
- SCM code;
+#undef FUNC_NAME
+
+
+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. The value returned from @var{code} which has been\n"
+ "passed to @code{procedure->memoizing-macro} replaces the form\n"
+ "passed to @var{code}. 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_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
- code, SCM_ARG1, s_makmmacro);
- SCM_RETURN_NEWSMOB (scm_tc16_macro | (2L << 16), code);
+ SCM_VALIDATE_PROC (1,code);
+ SCM_RETURN_NEWSMOB (scm_tc16_macro | (1L << 16), SCM_UNPACK (code));
}
+#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{proc} to the expression and the\n"
+ "environment. The value returned from @var{proc} which has been\n"
+ "passed to @code{procedure->memoizing-macro} replaces the form\n"
+ "passed to @var{proc}. 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_makmmacro
+{
+ SCM_VALIDATE_PROC (1,code);
+ SCM_RETURN_NEWSMOB (scm_tc16_macro | (2L << 16), SCM_UNPACK (code));
+}
+#undef FUNC_NAME
-SCM_PROC (s_macro_p, "macro?", 1, 0, 0, scm_macro_p);
-
-SCM
-scm_macro_p (obj)
- SCM obj;
+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_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro
- ? SCM_BOOL_T
- : SCM_BOOL_F);
+ return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_macro, obj));
}
+#undef FUNC_NAME
SCM_SYMBOL (scm_sym_syntax, "syntax");
SCM_SYMBOL (scm_sym_macro, "macro");
SCM_SYMBOL (scm_sym_mmacro, "macro!");
-SCM_PROC (s_macro_type, "macro-type", 1, 0, 0, scm_macro_type);
-
-SCM
-scm_macro_type (m)
- SCM m;
+SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0,
+ (SCM m),
+ "Return one of the symbols @code{syntax}, @code{macro} or\n"
+ "@code{macro!}, depending on whether @var{m} is a syntax\n"
+ "tranformer, a regular macro, or a memoizing macro,\n"
+ "respectively. If @var{m} is not a macro, @code{#f} is\n"
+ "returned.")
+#define FUNC_NAME s_scm_macro_type
{
- if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro))
+ if (!SCM_TYP16_PREDICATE (scm_tc16_macro, m))
return SCM_BOOL_F;
- switch ((int) (SCM_CAR (m) >> 16))
+ switch (SCM_MACRO_TYPE (m))
{
case 0: return scm_sym_syntax;
case 1: return scm_sym_macro;
case 2: return scm_sym_mmacro;
- default: scm_wrong_type_arg (s_macro_type, 1, m);
+ default: scm_wrong_type_arg (FUNC_NAME, 1, m);
}
}
+#undef FUNC_NAME
-SCM_PROC (s_macro_name, "macro-name", 1, 0, 0, scm_macro_name);
-
-SCM
-scm_macro_name (m)
- SCM m;
+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_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro,
- m,
- SCM_ARG1,
- s_macro_name);
- return scm_procedure_name (SCM_CDR (m));
+ SCM_VALIDATE_SMOB (1,m,macro);
+ return scm_procedure_name (SCM_PACK (SCM_SMOB_DATA (m)));
}
+#undef FUNC_NAME
-SCM_PROC (s_macro_transformer, "macro-transformer", 1, 0, 0, scm_macro_transformer);
-
-SCM
-scm_macro_transformer (m)
- SCM m;
+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_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro,
- m,
- SCM_ARG1,
- s_macro_transformer);
- return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F;
+ SCM_VALIDATE_SMOB (1,m,macro);
+ return ((SCM_CLOSUREP (SCM_PACK (SCM_SMOB_DATA (m)))) ?
+ SCM_PACK(SCM_SMOB_DATA (m)) : SCM_BOOL_F);
}
+#undef FUNC_NAME
SCM
-scm_make_synt (name, macroizer, fcn)
- const char *name;
- SCM (*macroizer) ();
- SCM (*fcn) ();
+scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() )
{
- SCM symcell = scm_sysintern (name, SCM_UNDEFINED);
- long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8);
- register SCM z;
- if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org))
- tmp = 0;
- SCM_NEWCELL (z);
- SCM_SUBRF (z) = fcn;
- SCM_SETCAR (z, tmp + scm_tc7_subr_2);
- SCM_SETCDR (symcell, macroizer (z));
- return SCM_CAR (symcell);
+ 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_mfpe ("macro", 0,
- scm_markcdr, NULL, NULL, NULL);
-#include "macros.x"
+ scm_tc16_macro = scm_make_smob_type ("macro", 0);
+ scm_set_smob_mark (scm_tc16_macro, scm_markcdr);
+ scm_set_smob_print (scm_tc16_macro, macro_print);
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/macros.x"
+#endif
}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff