[Boost-users] date-time library and checked iterators

Subject: [Boost-users] date-time library and checked iterators
From: gast128 (gast128_at_[hidden])
Date: 2008-09-16 05:53:10

Dear all,

last week we switched to vstudio 2008. It has checked iterator support and it 
already catched two incorrect (but probably also harmless) uses of iterators.

Maybe in the date time library there is also such a case. 

The stream operator on ptime eventually calls date_time::date_facet::do_put_tm
() function which probably uses an incorrect way of dereferencing string 
iterators when empty:

// use time_put facet to create final string
return std::use_facet<std::time_put<CharT> >(a_ios.getloc()).put(next, a_ios, 
fill_char, &tm_value, &*a_format.begin(), &*a_format.begin()+a_format.size());

When a_format is empty the begin iterator may not be dereferenced? I do know 
that the actual code is harmless, but now we get the M$ checked iterator error 
message, and turning it globally off would be pity, since it cna be an extra 
potential debugging tool.

Wkr,
me