[cfe-dev] Pointer Arithmetic

Keith Bauer onesadcookie at gmail.com
Thu Jul 12 16:49:37 PDT 2007

OK, a new patch, with apparently-working (pointer - pointer) too.

I've made getSize virtual in clang::Type (default implementation
asserts, and it should become pure virtual when it's implemented for
all the subclasses) and renamed the conflicting getSize in
clang::ArrayType to getSizeExpr.

I've added a getPointerDiffType alongside getSizeType, and updated
SemaExpr to return that type for (pointer - pointer).

There's a test case which checks that errors are generated or not as
appropriate in all cases (tests/Parser/pointer-arithmetic.c).

Again, criticism is welcome ;)

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