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/* classes: h_files */
#ifndef ENVIRONMENTS_H
#define ENVIRONMENTS_H
/* Copyright (C) 1999, 2000 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. */
#include "libguile/__scm.h"
/* The type for folding functions written in C. A function meant to be passed
* to scm_c_environment_fold should have the type scm_environment_folder.
*/
typedef SCM (*scm_environment_folder) (SCM data, SCM sym, SCM val, SCM tail);
/* The type for observer functions written in C. A function meant to be
* passed to scm_c_environment_observe should have the type
* scm_environment_observer.
*/
typedef void (*scm_environment_observer) (SCM env, SCM data);
struct scm_environment_funcs {
SCM (*ref) (SCM self, SCM symbol);
SCM (*fold) (SCM self, scm_environment_folder proc, SCM data, SCM init);
SCM (*define) (SCM self, SCM symbol, SCM value);
SCM (*undefine) (SCM self, SCM symbol);
SCM (*set) (SCM self, SCM symbol, SCM value);
SCM (*cell) (SCM self, SCM symbol, int for_write);
SCM (*observe) (SCM self, scm_environment_observer proc, SCM data, int weak_p);
void (*unobserve) (SCM self, SCM token);
SCM (*mark) (SCM self);
size_t (*free) (SCM self);
int (*print) (SCM self, SCM port, scm_print_state *pstate);
};
#define SCM_ENVIRONMENT_SUCCESS SCM_BOOL_T
#define SCM_ENVIRONMENT_BINDING_IMMUTABLE SCM_MAKINUM (0)
#define SCM_ENVIRONMENT_LOCATION_IMMUTABLE SCM_MAKINUM (1)
#define SCM_ENVIRONMENT_LOCATION_NO_CELL SCM_BOOL_F
extern scm_t_bits scm_tc16_environment;
#define SCM_ENVIRONMENT_P(x) \
(!SCM_IMP (x) && SCM_CELL_TYPE (x) == scm_tc16_environment)
#define SCM_ENVIRONMENT_FUNCS(env) \
(*((struct scm_environment_funcs **) SCM_CELL_WORD_1 (env)))
#define SCM_ENVIRONMENT_BOUND_P(env, symbol) \
(!SCM_UNBNDP (SCM_ENVIRONMENT_REF (env, symbol)))
#define SCM_ENVIRONMENT_REF(env, symbol) \
((*(SCM_ENVIRONMENT_FUNCS (env)->ref)) (env, symbol))
#define SCM_ENVIRONMENT_FOLD(env, proc, data, init) \
((*(SCM_ENVIRONMENT_FUNCS (env)->fold)) (env, proc, data, init))
#define SCM_ENVIRONMENT_DEFINE(env, symbol, value) \
((*(SCM_ENVIRONMENT_FUNCS (env)->define)) (env, symbol, value))
#define SCM_ENVIRONMENT_UNDEFINE(env, symbol) \
((*(SCM_ENVIRONMENT_FUNCS (env)->undefine)) (env, symbol))
#define SCM_ENVIRONMENT_SET(env, symbol, value) \
((*(SCM_ENVIRONMENT_FUNCS (env)->set)) (env, symbol, value))
#define SCM_ENVIRONMENT_CELL(env, symbol, for_write) \
((*(SCM_ENVIRONMENT_FUNCS (env)->cell)) (env, symbol, for_write))
#define SCM_ENVIRONMENT_OBSERVE(env, proc, data, weak_p) \
((*(SCM_ENVIRONMENT_FUNCS (env)->observe)) (env, proc, data, weak_p))
#define SCM_ENVIRONMENT_UNOBSERVE(env, token) \
((*(SCM_ENVIRONMENT_FUNCS (env)->unobserve)) (env, token))
extern scm_t_bits scm_tc16_observer;
#define SCM_OBSERVER_P(x) \
(!SCM_IMP (x) && (SCM_CELL_TYPE (x) == scm_tc16_observer))
#define SCM_OBSERVER_ENVIRONMENT(x) \
(SCM_CELL_OBJECT_1 (x))
#define SCM_OBSERVER_DATA(x) \
(SCM_CELL_OBJECT_2 (x))
#define SCM_OBSERVER_PROC(x) \
((scm_environment_observer) SCM_CELL_WORD_3 (x))
extern SCM scm_system_environment;
extern void scm_error_environment_unbound (const char *, SCM, SCM) SCM_NORETURN;
extern void scm_error_environment_immutable_binding (const char *, SCM, SCM) SCM_NORETURN;
extern void scm_error_environment_immutable_location (const char *, SCM, SCM) SCM_NORETURN;
extern SCM scm_make_environment (void *type);
extern SCM scm_environment_p (SCM env);
extern SCM scm_environment_bound_p (SCM env, SCM sym);
extern SCM scm_environment_ref (SCM env, SCM sym);
extern SCM scm_c_environment_ref (SCM env, SCM sym);
extern SCM scm_environment_fold (SCM env, SCM proc, SCM init);
extern SCM scm_c_environment_fold (SCM env, scm_environment_folder proc, SCM data, SCM init);
extern SCM scm_environment_define (SCM env, SCM sym, SCM val);
extern SCM scm_environment_undefine (SCM env, SCM sym);
extern SCM scm_environment_set_x (SCM env, SCM sym, SCM val);
extern SCM scm_environment_cell (SCM env, SCM sym, SCM for_write);
extern SCM scm_c_environment_cell (SCM env, SCM sym, int for_write);
extern SCM scm_environment_observe (SCM env, SCM proc);
extern SCM scm_environment_observe_weak (SCM env, SCM proc);
extern SCM scm_c_environment_observe (SCM env, scm_environment_observer proc, SCM data, int weak_p);
extern SCM scm_environment_unobserve (SCM token);
extern void scm_environments_prehistory (void);
extern void scm_init_environments (void);
extern void *scm_type_leaf_environment;
#define SCM_LEAF_ENVIRONMENT_P(env) \
(SCM_ENVIRONMENT_P (env) \
&& SCM_ENVIRONMENT_FUNCS (env) == scm_type_leaf_environment)
extern SCM scm_make_leaf_environment (void);
extern SCM scm_leaf_environment_p (SCM env);
extern void *scm_type_eval_environment;
#define SCM_EVAL_ENVIRONMENT_P(env) \
(SCM_ENVIRONMENT_P (env) \
&& SCM_ENVIRONMENT_FUNCS (env) == scm_type_eval_environment)
extern SCM scm_make_eval_environment (SCM local, SCM imported);
extern SCM scm_eval_environment_p (SCM env);
extern SCM scm_eval_environment_local (SCM env);
extern SCM scm_eval_environment_set_local_x (SCM env, SCM local);
extern SCM scm_eval_environment_imported (SCM env);
extern SCM scm_eval_environment_set_imported_x (SCM env, SCM imported);
extern void *scm_type_import_environment;
#define SCM_IMPORT_ENVIRONMENT_P(env) \
(SCM_ENVIRONMENT_P (env) \
&& SCM_ENVIRONMENT_FUNCS (env) == scm_type_import_environment)
extern SCM scm_make_import_environment (SCM imports, SCM conflict_proc);
extern SCM scm_import_environment_p (SCM env);
extern SCM scm_import_environment_imports (SCM env);
extern SCM scm_import_environment_set_imports_x (SCM env, SCM imports);
extern void *scm_type_export_environment;
#define SCM_EXPORT_ENVIRONMENT_P(env) \
(SCM_ENVIRONMENT_P (env) \
&& SCM_ENVIRONMENT_FUNCS (env) == scm_type_export_environment)
extern SCM scm_make_export_environment (SCM private, SCM signature);
extern SCM scm_export_environment_p (SCM env);
extern SCM scm_export_environment_private (SCM env);
extern SCM scm_export_environment_set_private_x (SCM env, SCM private);
extern SCM scm_export_environment_signature (SCM env);
extern SCM scm_export_environment_set_signature_x (SCM env, SCM signature);
#endif
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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