[Issue 7019] implicit constructors are inconsistently allowed

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7019


mail.mantis.88 at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mail.mantis.88 at gmail.com


--- Comment #7 from mail.mantis.88 at gmail.com 2012-01-26 13:55:55 PST ---
(In reply to comment #0)
> Yes, I'm aware that alias this makes it possible to allow implicit conversions,
> but it can't solve everything, esp. if you need to modify the value before you
> 'save' it:
> ...
Why not aliasing this to set/get methods, e.g:

struct Foo(T) {
    alias prop this;

    this( in T value ) {
        m_Prop = value;
    }

    @property:

    T prop() const {
        return m_Prop;
    }

    ref auto prop( in T value ) {
        return(m_Prop = value, this);
    }

    private: 

    T m_Prop;
}

void bar(T)( in Foo!T foo ) {
    writeln( cast(T)foo );
}

int main() {
    Foo!int foo = 42;
    bar( foo );
    foo = 10;
    bar( foo );
    return 0;
}

Are there any problems I'm not aware of?

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------