Re: [boost] [complex] Feedback and Potential Review Manager

Subject: Re: [boost] [complex] Feedback and Potential Review Manager
From: Neal Becker (ndbecker2_at_[hidden])
Date: 2012-05-07 11:02:54

Christopher Kormanyos wrote:

> 
> 
>> Did you also notice in my other post that
>> my suggested correction was, in fact, wrong? I am terribly
>> sorry about that. You actually need this:
>> explicit
>  complex(const T&  re = T(), const T&  im = T());
> 
> Geez! How many times can I get it wrong? I'm making
> a fool of myself here.
> 
> It's non-explicit and the default params are not zero,
> but rather the default ctor of the template type.
> 
> complex(const T&  re = T(), const T&  im = T());
> 
> It's time for me to take a break...
> 
> Best regards, Chris.
> 

Do I understand correctly that the default contructor does not set real and imag 
parts to zero?  Hurray!!

I consider it a serious defect in std::complex that it's default constructor 
performs non-trivial work.  Often large arrays of complex need to be constructed 
in high-performance computing applications.