[PATCH] D149013: [clang][Interp] Check pointers when accessing base class

[Timm Bäder via Phabricator via cfe-commits]

tbaeder added inline comments.


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Comment at: clang/test/AST/Interp/records.cpp:509-512
+  constexpr A *a2 = &b + 1; // expected-error {{must be initialized by a constant expression}} \
+                            // expected-note {{cannot access base class of pointer past the end of object}} \
+                            // ref-error {{must be initialized by a constant expression}} \
+                            // ref-note {{cannot access base class of pointer past the end of object}}
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cor3ntin wrote:
> aaron.ballman wrote:
> > I may have jumped the gun on accepting this, actually. Forming the pointer to `&b + 1` is fine, but evaluating it by dereferencing it would be UB. e.g., http://eel.is/c++draft/expr.const#13.3
> We probably want tests that ensure `&b+2` is invalid in all cases
It's being evaluated because the base class is accessed, isn't it? if `b` was of type `A*`, we would not emit a diagnostic (see line 506 above).


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  https://reviews.llvm.org/D149013/new/

https://reviews.llvm.org/D149013