Tag Archives: c++11

Small tips about containers in Intel Threading Building Blocks and C++11

Changing values in container

The code above will not change any value in container ‘table’. ‘auto’ will become std::pair and ‘item’ will be a copy of real item in ‘table’, so modify ‘item’ will not change the actual value in container. The correct way is:

or:

Do… Read more »

Why you should update your gcc (and c++ library)

Consider the code below:

It could be compiled and run on CentOS 5 (gcc-4.1.2), but will core dump at runtime.

The gdb stack shows the breakpoint is in string_hashfunc::operator():

Let’s see the source code of “ext/hash_map” in /usr/include/c++/4.1.2/ext/hashtable.h:

And in the implementation of _M_bkt_num():

It… Read more »