GObject Builder 介绍

GObject Builder 介绍

GOB (GOB2 anyway) is a preprocessor for making GObjects with inline C code sothat generated files are not edited. Syntax is inspired by Java and Yacc orLex. The implementation is intentionally kept simple, and no C actual codeparsing is done.

Reasons:

• C is a perfect (well mostly) language, no need for another language
• Writing a fully featured GObject is a hassle
• GObject has little type safety, GOB improves on it.
• Need for a generator that doesn't require changes to generated code
• I like how Java writes method code directly into the class definition.

/* * This file is a basic example of how a .gob file would be constructed, * how to add data members, properties and methods */requires 2.0.0%{#include <time.h>#include "my-person.h"#include "my-person-private.h"%}class My:Person from G:Object {        /* the name of the person */        private char *name = {g_strdup(_("Nobody"))}                destroywith g_free;        property STRING name                (nick = _("Name"),                 blurb = _("Name of the person"),                 default_value = _("Nobody"),                 /* Export get/set functions for this property */                 export,                 /* link to the data memeber 'name' */                 link);        /* date of birth as a time_t */        private long dob = 0;        property LONG dob                (nick = _("Date of birth"),                 blurb = _("Date of birth of the person"),                 minimum = 0,                 maximum = LONG_MAX,                 default_value = 0,                 export)                /* We could use 'link' as above, but the code below                 * shows how to do this without linking */                set {                        self->_priv->dob = g_value_get_long (VAL);                }                get {                        g_value_set_long (VAL, self->_priv->dob);                };        /* date of death as a time_t */        private long dod = 0;        property LONG dod                (nick = _("Date of death"),                 blurb = _("Date of death of the person"),                 minimum = 0,                 maximum = LONG_MAX,                 default_value = 0,                 export,                 link);        /* number of rounds in our shotgun */        private int rounds_in_shotgun = 0;        /* when the person gets born, sends out a signal, the caller           of the signal should provide the date of birth */        signal last NONE (LONG)        void        birth (self, long dob)        {                g_object_set (G_OBJECT (self),                              "dob", dob);        }                /* when the person dies, sends out a signal, the caller           of the signal should provide the date of death */        signal last NONE (LONG)        void        death (self, long dod)        {                g_object_set (G_OBJECT (self),                              "dod", dod);        }        public        void        load_shotgun (self)        {                /* add a round to our shotgun */                self->_priv->rounds_in_shotgun++;        }        public        void        shoot_oneself_in_the_head (self)        {                if (self->_priv->rounds_in_shotgun == 0) {                        g_warning (_("No rounds in the shotgun!"));                        return;                }                                /* one round was fired */                self->_priv->rounds_in_shotgun--;                /* death is imminent if we shoot oneself in the head */                death (self, (long)time (NULL));        }        public GObject *        new (void)        {                return (GObject *)GET_NEW;        }}