Re: [Boost-bugs] [Boost C++ Libraries] #7661: lexical_cast throws exception when strings have more than one null terminators

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7661: lexical_cast throws exception when strings have more than one null terminators
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-09 14:54:11

#7661: lexical_cast throws exception when strings have more than one null
terminators
--------------------------------+-------------------------------------------
  Reporter:  pengxu7@…          |       Owner:  apolukhin   
      Type:  Bugs               |      Status:  new         
 Milestone:  To Be Determined   |   Component:  lexical_cast
   Version:  Boost 1.52.0       |    Severity:  Problem     
Resolution:                     |    Keywords:              
--------------------------------+-------------------------------------------

Comment (by marshall):

 A `std::string` is not a null terminated string.

 The string that you have constructed is two characters long. The first
 character is a '0' (ASCII 48), and the second is a NUL (ASCII 0).

 When you print that string, it prints _two_ characters - it's just that
 your console does not display the NULL.

 If you build this program and run it, you would see "m" printed on your
 console.
 {{{
 #include <iostream>
 int main( int argc, char *argv[] ) {
         std::string m = "0";
         m += '\0';
         std::cout << m;
 }
 }}}

 But if you redirect the output to a file, and look at the file, you will
 see that the file is two characters long, with the second being the NULL.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7661#comment:3>
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