Hi,
On Fri, 2012-07-06 at 17:54 +0300, Tanu Kaskinen wrote:
> does the vala compiler really do this kind of deduction?
No, it doesn't:
$ cat Demo.vala
int foo(int a, string b = "", int c){
}
void main(){
foo(1, 2);
}
$ valac Demo.vala
Demo.vala:5.9-5.9: error: Argument 2: Cannot convert from `int' to `string'
foo(1, 2);
^
Compilation failed: 1 error(s), 0 warning(s)
$
However, the vala compiler actually does support reordering arguments,
so it would theoretically be possible to group the default arguments at
the end without changing the C-API or any runtime wrappers. I can
rewrite the bindings to do that, but I'd actually prefer to keep them
the way the are because
* I want to stay as close as possible to the C-API to ease
migration, avoid confusion and to make sure that the regular
doxygen documentation can be used.
* I want to include as much information as possible from the
doxygen documentation in the vala bindings. Vala allows me to
explicitly tell the programmer where passing NULL is ok (via
the ?-suffix). Similarly I wanted to include the information
where passing NULL is actually the thing you probably want to
do? (according to the doxygen documentation).
Best regards
Alexander Kurtz
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