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gtype: Add g_type_interface_instantiatable_prerequisite()

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This function returns the most specific instantiatable type
that is a prerequisite for a given interface.

This type is necessary in particular when dealing with GValues
because a GValue contains an instance of a type.

This commit includes tests for the new API.
This commit is contained in:
Benjamin Otte
2019-11-25 19:40:39 +01:00
committed by Philip Withnall
parent e1b5afb7c0
commit 98f0a5a7da
4 changed files with 115 additions and 0 deletions
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63
gobject/tests/type.c
View File

@@ -40,6 +40,63 @@ foo_default_init (FooInterface *iface)
{
}
typedef struct {
GTypeInterface g_iface;
} BaaInterface;
GType baa_get_type (void);
G_DEFINE_INTERFACE (Baa, baa, G_TYPE_INVALID)
static void
baa_default_init (BaaInterface *iface)
{
}
typedef struct {
GTypeInterface g_iface;
} BooInterface;
GType boo_get_type (void);
G_DEFINE_INTERFACE_WITH_CODE (Boo, boo, G_TYPE_INVALID,
g_type_interface_add_prerequisite (g_define_type_id, baa_get_type ()))
static void
boo_default_init (BooInterface *iface)
{
}
typedef struct {
GTypeInterface g_iface;
} BibiInterface;
GType bibi_get_type (void);
G_DEFINE_INTERFACE (Bibi, bibi, G_TYPE_INITIALLY_UNOWNED)
static void
bibi_default_init (BibiInterface *iface)
{
}
typedef struct {
GTypeInterface g_iface;
} BozoInterface;
GType bozo_get_type (void);
G_DEFINE_INTERFACE_WITH_CODE (Bozo, bozo, G_TYPE_INVALID,
g_type_interface_add_prerequisite (g_define_type_id, foo_get_type ());
g_type_interface_add_prerequisite (g_define_type_id, bibi_get_type ()))
static void
bozo_default_init (BozoInterface *iface)
{
}
static void
test_interface_prerequisite (void)
{
@@ -52,6 +109,7 @@ test_interface_prerequisite (void)
g_assert_cmpint (n_prereqs, ==, 2);
g_assert (prereqs[0] == bar_get_type ());
g_assert (prereqs[1] == G_TYPE_OBJECT);
g_assert (g_type_interface_instantiatable_prerequisite (foo_get_type ()) == G_TYPE_OBJECT);
iface = g_type_default_interface_ref (foo_get_type ());
parent = g_type_interface_peek_parent (iface);
@@ -59,6 +117,11 @@ test_interface_prerequisite (void)
g_type_default_interface_unref (iface);
g_free (prereqs);
g_assert_cmpint (g_type_interface_instantiatable_prerequisite (baa_get_type ()), ==, G_TYPE_INVALID);
g_assert_cmpint (g_type_interface_instantiatable_prerequisite (boo_get_type ()), ==, G_TYPE_INVALID);
g_assert_cmpint (g_type_interface_instantiatable_prerequisite (bozo_get_type ()), ==, G_TYPE_INITIALLY_UNOWNED);
}
typedef struct {