> On Oct 29, 2014, at 10:59 AM, jing...@apple.com wrote: > > I hadn't seen that. That looks pretty useful for things like reintroducing > the "size" method for std::vectors that hold the size in an easily accessible > field, or something else like that. It involves re-implementing the guts of > the library you are patching up in Python using debugger API's so it isn't > entirely straight-forward. Note we already do a similar sort of thing in the > data formatters to produce nice summaries and "synthetic children" for std & > Foundation types that can avoid running code. I think gdb also has some > formatter infrastructure like this, IIRC, but I haven't used gdb much for a > few years now. >
It’s called “pretty printers” (but they do both summaries & synthetic children): https://sourceware.org/gdb/current/onlinedocs/gdb/Pretty-Printing-API.html#Pretty-Printing-API > Anyway, you'd be hard pressed to use something like these Xmethods to do more > science fiction'y things like "I wish that I had std::vector<T> around for > some experiment I want to do in the debugger, but the program never used > std::vector<T>, please make it for me". Not sure how often you'd really use > that, but the point is that if we had the C++ modules around, we would get it > pretty much for free. > > Jim > > >> On Oct 29, 2014, at 10:44 AM, Siva Chandra <sivachan...@google.com> wrote: >> >> On Wed, Oct 29, 2014 at 10:33 AM, <jing...@apple.com> wrote: >>> And for instance, if we ever get good support for modules in C++, >>> we could presumably then use that to do things like instantiate template >>> classes for types that weren't instantiated in the current program, and >>> other cool'o things like that which would be hard to do with some >>> hand-built C++ parser, a la gdb. >> >> GDB's solution for such cases currently is XMethods: >> https://sourceware.org/gdb/current/onlinedocs/gdb/Xmethods-In-Python.html >> >> There are a bunch of XMethods available for container classes in >> libstdc++: >> https://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python/libstdcxx/v6/xmethods.py > > > _______________________________________________ > lldb-dev mailing list > lldb-dev@cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev Thanks, - Enrico 📩 egranata@.com ☎️ 27683
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