[patch] std::string::operator[] extension in debug mode

[Gabriel Dos Reis]

Jonathan Wakely <cow@compsoc.man.ac.uk> writes:

| On Thu, May 19, 2005 at 06:52:05PM -0500, Douglas Gregor wrote:
| 
| > On May 19, 2005, at 5:03 PM, Gabriel Dos Reis wrote:
| > 
| > >At configure time, if user instructs us that he also wants to use the
| > >"debug lib" later, then we should make the appropriate instantiation
| > >for the std::string so that it gest found latter.
| > 
| > Are you referring to the configure option "--enable-libstdcxx-debug"? 
| > At present, to my understanding, it does not have any effect on the 
| > operation of -D_GLIBCXX_DEBUG.
| > 
| > Or are you proposing that we should have some relationship between 
| > --enable-libstdcxx-debug and _GLIBCXX_DEBUG? I can imagine that we 
| > might instantiate std::string and std::wstring with _GLIBCXX_DEBUG 
| > defined and place the results in the debug/libstdc++.(a or so) file 
| > generated when --enable-libstdcxx-debug is defined.
| 
| IMHO that would be a bad idea to do unconditionally, if you have some
| weird behaviour and want to debug it, you want to use a version of the
| library which is the same except for debugging symbols, you don't
| necessarily want one that executes different code (as happens when
| _GLIBCXX_DEBUG is defined)

Exactly, which symbols are we talking about here? 

-- Gaby