[Issue 9164] Can't easily assign one Nullable to another

[d-bugmail]

http://d.puremagic.com/issues/show_bug.cgi?id=9164


bearophile_h...@eml.cc changed:

           What    |Removed                     |Added
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                 CC|                            |bearophile_h...@eml.cc


--- Comment #1 from bearophile_h...@eml.cc 2012-12-16 18:45:18 PST ---
Adding an opAssign overload to Nullable is maybe enough:


/**
Assigns $(D value) to the internally-held state. If the assignment
succeeds, $(D this) becomes non-null.
 */
    void opAssign()(T value)
    {
        _value = value;
        _isNull = false;
    }

/// ditto
void opAssign()(Nullable other)
    {
        _value = other._value;
        _isNull = other._isNull;
    }


Or maybe just (no templated):


/**
Assigns $(D value) to the internally-held state. If the assignment
succeeds, $(D this) becomes non-null.
 */
    void opAssign(T value)
    {
        _value = value;
        _isNull = false;
    }

/// ditto
void opAssign(Nullable other)
    {
        _value = other._value;
        _isNull = other._isNull;
    }

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