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/* Copyright (C) 1995, 1996, 1997, 1999, 2000, 2001, 2006, 2008, 2009,
* 2010, 2011, 2012 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
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "libguile/_scm.h"
#include "libguile/strings.h"
#include "libguile/vectors.h"
#include "libguile/smob.h"
#include "libguile/deprecation.h"
#include "libguile/validate.h"
#include "libguile/procs.h"
#include "libguile/procprop.h"
#include "libguile/objcodes.h"
#include "libguile/programs.h"
/* {Procedures}
*/
SCM_DEFINE (scm_procedure_p, "procedure?", 1, 0, 0,
(SCM obj),
"Return @code{#t} if @var{obj} is a procedure.")
#define FUNC_NAME s_scm_procedure_p
{
if (SCM_NIMP (obj))
switch (SCM_TYP7 (obj))
{
case scm_tcs_struct:
if (!((SCM_OBJ_CLASS_FLAGS (obj) & SCM_CLASSF_PURE_GENERIC)
|| SCM_STRUCT_APPLICABLE_P (obj)))
break;
case scm_tc7_program:
return SCM_BOOL_T;
case scm_tc7_smob:
return scm_from_bool (SCM_SMOB_DESCRIPTOR (obj).apply);
default:
return SCM_BOOL_F;
}
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_thunk_p, "thunk?", 1, 0, 0,
(SCM obj),
"Return @code{#t} if @var{obj} is a thunk.")
#define FUNC_NAME s_scm_thunk_p
{
int req, opt, rest;
return scm_from_bool (scm_i_procedure_arity (obj, &req, &opt, &rest)
&& req == 0);
}
#undef FUNC_NAME
SCM_GLOBAL_SYMBOL (scm_sym_documentation, "documentation");
SCM_DEFINE (scm_procedure_documentation, "procedure-documentation", 1, 0, 0,
(SCM proc),
"Return the documentation string associated with @code{proc}. By\n"
"convention, if a procedure contains more than one expression and the\n"
"first expression is a string constant, that string is assumed to contain\n"
"documentation for that procedure.")
#define FUNC_NAME s_scm_procedure_documentation
{
SCM_VALIDATE_PROC (SCM_ARG1, proc);
return scm_procedure_property (proc, scm_sym_documentation);
}
#undef FUNC_NAME
/* Procedure-with-setter
*/
static SCM pws_vtable;
SCM_DEFINE (scm_procedure_with_setter_p, "procedure-with-setter?", 1, 0, 0,
(SCM obj),
"Return @code{#t} if @var{obj} is a procedure with an\n"
"associated setter procedure.")
#define FUNC_NAME s_scm_procedure_with_setter_p
{
return scm_from_bool (SCM_STRUCTP (obj) && SCM_STRUCT_SETTER_P (obj));
}
#undef FUNC_NAME
SCM_DEFINE (scm_make_procedure_with_setter, "make-procedure-with-setter", 2, 0, 0,
(SCM procedure, SCM setter),
"Create a new procedure which behaves like @var{procedure}, but\n"
"with the associated setter @var{setter}.")
#define FUNC_NAME s_scm_make_procedure_with_setter
{
SCM name, ret;
SCM_VALIDATE_PROC (1, procedure);
SCM_VALIDATE_PROC (2, setter);
ret = scm_make_struct (pws_vtable, SCM_INUM0,
scm_list_2 (procedure, setter));
/* don't use procedure_name, because don't care enough to do a reverse
lookup */
name = scm_procedure_property (procedure, scm_sym_name);
if (scm_is_true (name))
scm_set_procedure_property_x (ret, scm_sym_name, name);
return ret;
}
#undef FUNC_NAME
SCM_DEFINE (scm_procedure, "procedure", 1, 0, 0,
(SCM proc),
"Return the procedure of @var{proc}, which must be an\n"
"applicable struct.")
#define FUNC_NAME s_scm_procedure
{
SCM_ASSERT (SCM_STRUCTP (proc) && SCM_STRUCT_APPLICABLE_P (proc),
proc, SCM_ARG1, FUNC_NAME);
return SCM_STRUCT_PROCEDURE (proc);
}
#undef FUNC_NAME
SCM_PRIMITIVE_GENERIC (scm_setter, "setter", 1, 0, 0,
(SCM proc),
"Return the setter of @var{proc}, which must be an\n"
"applicable struct with a setter.")
#define FUNC_NAME s_scm_setter
{
SCM_GASSERT1 (SCM_STRUCTP (proc), g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
if (SCM_STRUCT_SETTER_P (proc))
return SCM_STRUCT_SETTER (proc);
if (SCM_PUREGENERICP (proc)
&& SCM_IS_A_P (proc, scm_class_generic_with_setter))
/* FIXME: might not be an accessor */
return SCM_GENERIC_SETTER (proc);
SCM_WTA_DISPATCH_1 (g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
return SCM_BOOL_F; /* not reached */
}
#undef FUNC_NAME
void
scm_init_procs ()
{
pws_vtable =
scm_c_make_struct (scm_applicable_struct_with_setter_vtable_vtable,
0,
1,
SCM_UNPACK (scm_from_latin1_symbol ("pwpw")));
#include "libguile/procs.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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