The Vala Tutorial says:
Defining new Type from other
Defining a new type is a matter of derive it from the one you need.
Here are some examples:
/* defining an alias for a basic type (equivalent to typedef int Integer in
C)*/
[SimpleType]
public struct Integer : uint {
}
but when I try this, I get code that references undefined integer_dup()
and integer_free() operations.
Is this a bug in the valac code generation, or in the tutorial?
Attached is the vala source and generated C code for a test case.
It's also a bit worrisome that the C output uses both 'int32_t' and
'gint32' for the Integer type, depending on how it's used.
-m
/* defining an alias for a basic type (equivalent to typedef int Integer in C)*/
[SimpleType]
public struct Foo : int32 {}
void bar(Foo x) {
int32 y = x + 3;
}
/* typedefish.c generated by valac 0.15.0, the Vala compiler
* generated from typedefish.vala, do not modify */
/* defining an alias for a basic type (equivalent to typedef int Integer in C)*/
#include <glib.h>
#include <glib-object.h>
#include <stdint.h>
void bar (int32_t x);
GType foo_get_type (void) {
static volatile gsize foo_type_id__volatile = 0;
if (g_once_init_enter (&foo_type_id__volatile)) {
GType foo_type_id;
foo_type_id = g_boxed_type_register_static ("int32_t", (GBoxedCopyFunc) foo_dup, (GBoxedFreeFunc) foo_free);
g_once_init_leave (&foo_type_id__volatile, foo_type_id);
}
return foo_type_id__volatile;
}
void bar (int32_t x) {
int32_t _tmp0_;
gint32 y;
_tmp0_ = x;
y = (gint32) (_tmp0_ + 3);
}
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