[Vala] automatic basic type conversions

[pancake <pancake youterm com>]

Actually Vala forces you to pass the correct type for assignations , 
argument passing in functions, etc..

I think this should be a warning instead of an error. And Vala should 
know about which basic
types can be automatically casted (and show a warning) or an error if 
they cannot be converted.

For example.

If I have a string and i need a uint8* the cast is possible.

Other basic type conversions that are interesting are between types with 
precission loss:

 double -> float
 int -> char
 int -> uint32
 ...

In the api bindings i'm writing i use uint32 values for length arguments 
and i have to cast them
all the time because vala is unable to convert from long to uint32.

I understand that vala should provide a minimal code for making this 
conversion before calling the
function, because a negative value should be handled in a different way 
(like only pass possitive
value, or so..)

What do you think we should do for this kind of conversions?

--pancake