87 lines
3.5 KiB
C
87 lines
3.5 KiB
C
|
|
/* +--------------------------------------------------------------------------+
|
|
** | _ _ _ |
|
|
** | | \ | | (_) |
|
|
** | | \| | ___ _ __ _ |
|
|
** | | . ` |/ _ \| |/ _` | |
|
|
** | | |\ | (_) | | (_| | |
|
|
** | |_| \_|\___/| |\__,_| |
|
|
** | _/ | |
|
|
** | |__/ |
|
|
** +--------------------------------------------------------------------------+
|
|
** | Copyright (c) 2022 Francesco Cozzuto <francesco.cozzuto@gmail.com> |
|
|
** +--------------------------------------------------------------------------+
|
|
** | This file is part of The Noja Interpreter. |
|
|
** | |
|
|
** | The Noja Interpreter 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 3 of the License, or (at |
|
|
** | your option) any later version. |
|
|
** | |
|
|
** | The Noja Interpreter 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 The Noja Interpreter. If not, see <http://www.gnu.org/licenses/>. |
|
|
** +--------------------------------------------------------------------------+
|
|
*/
|
|
|
|
#include "../utils/defs.h"
|
|
#include "objects.h"
|
|
|
|
typedef struct ClosureObject ClosureObject;
|
|
|
|
struct ClosureObject {
|
|
Object base;
|
|
Object *prev;
|
|
Object *vars;
|
|
};
|
|
|
|
static void walk(Object *self, void (*callback)(Object **referer, void *userp), void *userp);
|
|
static Object *select_(Object *self, Object *key, Heap *heap, Error *err);
|
|
|
|
static TypeObject t_closure = {
|
|
.base = (Object) { .type = &t_type, .flags = Object_STATIC },
|
|
.name = "Closure",
|
|
.size = sizeof(ClosureObject),
|
|
.select = select_,
|
|
.walk = walk,
|
|
};
|
|
|
|
Object *Object_NewClosure(Object *parent, Object *new_map, Heap *heap, Error *error)
|
|
{
|
|
ClosureObject *obj = (ClosureObject*) Heap_Malloc(heap, &t_closure, error);
|
|
|
|
if(obj == NULL)
|
|
return NULL;
|
|
|
|
obj->prev = parent;
|
|
obj->vars = new_map;
|
|
|
|
return (Object*) obj;
|
|
}
|
|
|
|
static Object *select_(Object *self, Object *key,
|
|
Heap *heap, Error *err)
|
|
{
|
|
ClosureObject *closure = (ClosureObject*) self;
|
|
|
|
Object *selected = Object_Select(closure->vars, key, heap, err);
|
|
if(err->occurred)
|
|
return NULL;
|
|
|
|
if (selected == NULL)
|
|
selected = Object_Select(closure->prev, key, heap, err);
|
|
|
|
return selected;
|
|
}
|
|
|
|
static void walk(Object *self, void (*callback)(Object **referer, void *userp), void *userp)
|
|
{
|
|
ClosureObject *closure = (ClosureObject*) self;
|
|
|
|
callback((Object**) &closure->prev, userp);
|
|
callback(&closure->vars, userp);
|
|
} |