[cfe-users] Basic AST-dump when errors are encountered

[Lander Brandt via cfe-users]

I’m trying to parse the following file: http://opensource.apple.com/source/IOUSBFamily/IOUSBFamily-630.4.5/IOUSBUserClient/Classes/IOUSBInterfaceUserClientV3.cpp

With the following command:

    clang -ferror-limit=1000 -Xclang -ast-dump -I$HOME/Downloads/IOUSBFamily-630.4.5/IOUSBUserClient/Headers ~/Downloads/IOUSBFamily-630.4.5/IOUSBUserClient/Classes/IOUSBInterfaceUserClientV3.cpp

Since so many errors occur though, clang does not emit nearly as much information as I’d like. Specifically I’m trying to get the `IOUSBInterfaceUserClientV3::sV3Methods[kIOUSBLibInterfaceUserClientV3NumCommands]` definition but the following error occurs:

IOUSBFamily-630.4.5/IOUSBUserClient/Classes/IOUSBInterfaceUserClientV3.cpp:56:7: error: expected function body after function

      declarator

const IOExternalMethodDispatch

      ^

The `OSDefineMetaClassAndStructors` macro seems to throw off parsing (even within Xcode).

You can download the full source at http://opensource.apple.com/tarballs/IOUSBFamily/IOUSBFamily-630.4.5.tar.gz to try reproducing.

I was wondering if there’s any way to use libclang or clang’s `-ast-dump` switch to get something resembling the output I desire? Specifically the `IOUSBInterfaceUserClientV3::sV3Methods[kIOUSBLibInterfaceUserClientV3NumCommands]` definition (I’m just trying to get info about the elements).
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