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Re: #include and namespaces

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In article <8762eory8s.fsf@gmail.com>, Gareth Owen  <gwowen@gmail.com> wrote:
>yatremblay@bel1lin202.(none) (Yannick Tremblay) writes:
>
>> However what are peoples opinion of specific using directives in
>> headers, e.g.: "using std::string;".  Should they be absolutely
>> rejected as with "using namespace" or is there any situation under
>> which they are tolerable?
>
>
>frob.hpp
>--------
>std::vector<std::string> tokenize(const std::string&);

I mean:

frob.hpp
----------
using std::string;
using std::vector;

vector<string> tokenize(const string &);

>
>frob.cpp
>--------
and:

#include "frob.hpp"

>std::vector<std::string> tokenize(const std::string& in)
>{
deleted:
//>  using std::string; 
//>  using std::vector;
>  
>  vector<string> tokens;
>  while(something) {
>     string tmp1 = foo(in);
>     string tmp2 = bar(in);
>     vector<string> parts;
>     tokens.push_back(etc....);
>     // more code     
>     // ....
>  }
>
>  return tokens;
>}
>
>I can't see why that should be even slighty intolerable...

I mean using std::string; in the header, not in the cpp.
It is generally accepted that "using namespace xxx;" in headers is
unacceptable. I was asking for the general opinion on "using
std::string;" in headers.


Yannick

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#include and namespaces Luca Cerone <luca.cerone@gmail.com> - 2012-03-01 00:34 -0800
  Re: #include and namespaces Victor Bazarov <v.bazarov@comcast.invalid> - 2012-03-01 07:54 -0500
    Re: #include and namespaces Luca Cerone <luca.cerone@gmail.com> - 2012-03-01 06:38 -0800
      Re: #include and namespaces Victor Bazarov <v.bazarov@comcast.invalid> - 2012-03-01 14:26 -0500
        Re: #include and namespaces Luca Cerone <luca.cerone@gmail.com> - 2012-03-02 00:47 -0800
    Re: #include and namespaces yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-03-01 17:38 +0000
      Re: #include and namespaces Gareth Owen <gwowen@gmail.com> - 2012-03-01 18:07 +0000
        Re: #include and namespaces yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-03-01 18:52 +0000
          Re: #include and namespaces Paavo Helde <myfirstname@osa.pri.ee> - 2012-03-01 15:13 -0600
      Re: #include and namespaces "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-03-01 19:07 +0100
        Re: #include and namespaces yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-03-02 08:02 +0000
          Re: #include and namespaces "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-03-02 11:12 +0100
  Re: #include and namespaces Anand Hariharan <mailto.anand.hariharan@gmail.com> - 2012-03-01 11:20 -0800
    Re: #include and namespaces Victor Bazarov <v.bazarov@comcast.invalid> - 2012-03-01 14:30 -0500
      Re: #include and namespaces "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-03-01 20:53 +0100
        Re: #include and namespaces Miles Bader <miles@gnu.org> - 2012-03-02 09:51 +0900
        Re: #include and namespaces Daniel <danielaparker@gmail.com> - 2012-03-02 05:13 -0800
          Re: #include and namespaces Miles Bader <miles@gnu.org> - 2012-03-02 22:59 +0900
            Re: #include and namespaces Daniel <danielaparker@gmail.com> - 2012-03-02 10:31 -0800
              Re: #include and namespaces Miles Bader <miles@gnu.org> - 2012-03-03 10:54 +0900
              Re: #include and namespaces "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-03-03 08:53 +0100
  Re: #include and namespaces Juha Nieminen <nospam@thanks.invalid> - 2012-03-02 18:37 +0000
    Re: #include and namespaces Luca Cerone <luca.cerone@gmail.com> - 2012-03-03 04:22 -0800

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