[PATCH] Add [some] template argument-extraction calls to libclang & cindex

[Rob Springer]

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Comment at: bindings/python/tests/cindex/test_cursor.py:287
@@ +286,3 @@
+        found = True
+        assert ctypes.c_int(foo.get_template_argument_value(0)).value == -7
+        assert ctypes.c_bool(foo.get_template_argument_value(2)).value == True
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rspringer wrote:
> eliben wrote:
> > Why the ctypes casts here?
> get_template_argument_value and get_template_argument_unsigned_value return the values as 64-bit signed and unsigned integers, respectively, but the values as declared in the template are ints and bools, respectively, so I want to cast them to 32-bit values to make sure they're extracted correctly as those values.
> 
> It's really not necessary for the bools (obviously), but I suppose I'm a fan of symmetry. I'm happy to change that, though, if you think they're just clutter.
After further thought, I realized this was only necessary b/c I was defining get_template_argument_value in terms of get_template_argument_unsigned_value (which zero-extends, rather than sign-extends, its argument). When going to fix that, I realized that a large body of the code in that area could be refactored, which I've now done.
It's a lot better now; PTAL.

http://reviews.llvm.org/D5621