From: Joel de Guzman (joel_at_[hidden])
Date: 2008-07-02 18:16:01
Eric Niebler wrote:
> David Abrahams wrote:
>> Eric Niebler wrote:
>>> The Phoenix/Proto port in (Phoenix v3) uses BOOST_TYPEOF to deduce the
>>> the type of expressions involving operators, with the exception of the
>>> function call operator. For the function call operator, Phoenix v3 uses
>>> result_of to calculate the return type.
>> Interesting. Kinda makes sense, but could you explain the rationale
> You mean, the rationale for using result_of instead of BOOST_TYPEOF for
> the function call operator? BOOST_TYPEOF can't perfectly distinguish
> between lvalues and rvalues.
Yeah, that's my basic problem with BOOST_TYPEOF.
I fudge it where I have to,
Where do you fudge it? if_then expression? How? How about ordinary
operators like a + b? Do you simply not allow weird uses like:
X& operator+(A a, B b)
return a reference??
-- Joel de Guzman http://www.boostpro.com http://spirit.sf.net