🚀 go-pugleaf

alindbac@sw.seisy.abb.se (Anders Lindback) writes:

>> Why is it not allowed to delegate the initialisation to another
>> constructor
>> 
>> class X
>> {
>> public:
>> X (int i) : i_(i) {}
>> 
>> X () : X(34) {}             // Not allowed

> Well, one could use a similar thing using a member function:

> X (int i) { init(i); }
> X () { init(34); }

> where init is a member function for class X.

The problem is that member functions can't initialize anything.  Often
this is just a minor nuisance: the X ctor calls the default ctor of
the data member, which gets then immediately overwritten by assignment
in init().  But you can't use this technique when you deal with const
and reference members.  Thus the syntax "X () : X(34) {}" would still
be useful.  Has anyone written a proposal?
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