How to pretty-print STL containers in GDB?

Question

I\'ve followed the instructions on the GDB wiki to install the python pretty-printers for viewing STL containers. My ~/.gdbinit now looks like this:

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Answer 1

I think you are using a non-GNU STL library, or possible a very old GCC libstdc++. The type of a normal STL string on my compiler is: std::basic_string, std::allocator >. Note that this is not std::basic_string.

The Python code has this in it:

reptype = gdb.lookup_type (str (realtype) + '::_Rep').pointer ()

This look up a nested type ::Rep of whatever the base string type actually is. The error message inidicates that the string class of whatever strange library you're using doesn't actually have a ::Rep nested type.