On 19 January 2017 at 03:47, Aaron Ballman <aaron.ball...@gmail.com> wrote: > It is not used in an unevaluated context -- that is a bug.
It is an evaluated expression, but is it odr-used? C++14 [basic.def.odr] p3: A variable x whose name appears as a potentially-evaluated expression ex is odr-used by ex unless applying the lvalue-to-rvalue conversion (4.1) to x yields a constant expression (5.20) that does not invoke any nontrivial functions and, if x is an object, ex is an element of the set of potential results of an expression e, where either the lvalue-to-rvalue conversion (4.1) is applied to e, or e is a discarded-value expression (Clause 5). ... 5.20 [expr.const] p3: An integral constant expression is an expression of integral or unscoped enumeration type, implicitly converted to a prvalue, where the converted expression is a core constant expression. [ Note: Such expressions may be used as array bounds (8.3.4, 5.3.4), as bit-field lengths (9.6), as enumerator initializers if the underlying type is not fixed (7.2), and as alignments (7.6.2). — end note ] I read that as kDelta is not odr-used. GCC and ICC don't require kDelta to be captured either. -- Malcolm Parsons _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits