Patch by Brian Gesiak!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201762 91177308-0d34-0410-b5e6-96231b3b80d8

The code inside cindex.py was comparing NULL pointer returned by
clang_parseTranslationUnit and clang_createTranslationUnit with None.
However, as illustrated by the two tests I've added, those conditions
were ineffective which resulted in assert triggering later on.

Instead, a pointer is now treated as a boolean value, a NULL pointer being
False.

Contributed-by: Xavier Deguillard <deguilx@gmail.com>

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* TranslationUnit reading and parsing now implemented as
  TranslationUnit.from_ast() and TranslationUnit.from_source().
* Index.parse() and Index.read() implemented through above.
* Index.parse() and Index.read() now raise a TanslationUnitLoadException
  instead of returning None if a TranslationUnit could not be
  instantiated. This is backwards incompatible.
* Ability to save TranslationUnits via TranslationUnit.save().
* TranslationUnit now holds onto Index instance that created. This means
  the Index can't be GC'd until the TranslationUnit is itself GC'd,
  making memory management thoughtless.
* Don't use [] as a default argument value, as the initial value used is
  reused for the duration of the program.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156372 91177308-0d34-0410-b5e6-96231b3b80d8

Bendersky. Specifically: 

* Implemented a new function in libclang: clang_isAttribute

* Fixing TranslationUnit.get_includes to only go through the argument
* buffer when it contains something. This fixed a crash on Windows 

* clang_getFileName returns CXString, not char*. Made appropriate
* fixes in cindex.py - now the relevant tests pass and we can see the
* full locations correctly again (previously there was garbage in
* place of the file name) 
* Exposed clang_getCursorDisplayName to the python bindings



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134460 91177308-0d34-0410-b5e6-96231b3b80d8

This is the first step to make the clang_complete vim plugin work with
libclang. Reparsing improves parsing time from 0.8 to 0.25 secs for
one of my LLVM .cpp files.

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Also, add CursorKind.get_all_kinds().

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 - Some tweaks by me for API changes, Darwin, and x86_64 support. Still needs
   substantial updating to match recent CIndex API changes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94349 91177308-0d34-0410-b5e6-96231b3b80d8