[Boost-users] Re: Two issues with lexical_cast

From: Yuval Ronen (ronen_yuval_at_[hidden])
Date: 2005-01-19 01:56:40

>> 1. lexical_cast(Source arg) takes the source argument by value. Why 
>> not by const& ? Calling lexical_cast(some_basic_string) now makes a 
>> copy of the source argument for no reason.
> 
> 
> There actually was a reason. Something about certain functions not 
> working properly with a const&. Like the std::limits or something like 
> that. (I ran into this problem because lexical_cast(Parent p) when given 
> a child will actually create a parent object, so no amount of overriding 
> virtuals changes things.)

The thing about the parent being created is serious. So the problem is 
even more severe than I thought...