b00b95198e
Changing the type of N from int to unsigned in decltype82.C (from r13-986-g0ecb6b906f215e) reveals another spot where we perform constexpr evaluation in an unevaluated context for sake of warnings, this time from the call to shorten_compare in cp_build_binary_op, which calls fold_for_warn. We could (and probably should) suppress the shorten_compare warnings when in an unevaluated context, but there's probably other callers of fold_for_warn that are similarly affected. So this patch takes the approach of directly suppressing fold_for_warn when in an unevaluated context. PR c++/105931 gcc/cp/ChangeLog: * expr.cc (fold_for_warn): Don't fold when in an unevaluated context. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/decltype82a.C: New test. |
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