updated makefile. Now the noja interpreter is build as a library and then linked to the cli

src/noja/objects/o_none.c

@@ -0,0 +1,95 @@
+
+/* +--------------------------------------------------------------------------+
+** |                          _   _       _                                   |
+** |                         | \ | |     (_)                                  |
+** |                         |  \| | ___  _  __ _                             |
+** |                         | . ` |/ _ \| |/ _` |                            |
+** |                         | |\  | (_) | | (_| |                            |
+** |                         |_| \_|\___/| |\__,_|                            |
+** |                                    _/ |                                  |
+** |                                   |__/                                   |
+** +--------------------------------------------------------------------------+
+** | 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 <assert.h>
+#include <string.h>
+#include "objects.h"
+
+static _Bool op_eql(Object *self, Object *other);
+static void   print(Object *obj, FILE *fp);
+static int     hash(Object *self);
+static Object *copy(Object *self, Heap *heap, Error *err);
+
+static TypeObject t_none = {
+	.base = (Object) { .type = &t_type, .flags = Object_STATIC },
+	.name = "none",
+	.size = sizeof (Object),
+	.hash = hash,
+	.copy = copy,
+	.print = print,
+	.op_eql = op_eql,
+};
+
+static Object the_none_object = {
+	.type = &t_none,
+	.flags = Object_STATIC,
+};
+
+_Bool Object_IsNone(Object *obj)
+{
+	return obj == &the_none_object;
+}
+
+static int hash(Object *self)
+{
+	assert(self == &the_none_object);
+	return 0;
+}
+
+static Object *copy(Object *self, Heap *heap, Error *err)
+{
+	(void) heap;
+	(void) err;
+	return self;
+}
+
+Object *Object_NewNone(Heap *heap, Error *error)
+{
+	(void) heap;
+	(void) error;
+	return &the_none_object;
+}
+
+static void print(Object *obj, FILE *fp)
+{
+	assert(fp != NULL);
+	assert(obj != NULL);
+	assert(obj->type == &t_none);
+
+	fprintf(fp, "none");
+}
+
+static _Bool op_eql(Object *self, Object *other)
+{
+	(void) self;
+	
+	assert(other->type == &t_none);
+	return 1;
+}