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Re: [C++ Patch] [PR c++/88146] do not crash synthesizing inherited ctor(...)
On Sat, Dec 29, 2018 at 12:33:18AM -0200, Alexandre Oliva wrote:
> --- a/gcc/cp/typeck2.c
> +++ b/gcc/cp/typeck2.c
> @@ -918,7 +918,11 @@ check_narrowing (tree type, tree init, tsubst_flags_t complain, bool const_only)
> return ok;
> - init = maybe_constant_value (init);
> + /* Immediate subexpressions in BRACED_ENCLOSED_INITIALIZERs are
> + potentially constant evaluated. Without manifestly_const_eval,
The term in latest draft is manifestly constant-evaluated.
> + we won't instantiate constexpr functions that we must
> + instantiate. */
> + init = maybe_constant_value (init, NULL_TREE, /*manifestly_const_eval=*/true);
If this is a right change, then it should be covered also by a testcase that
makes sure __builtin_is_constant_evaluated () in those initializers
evaluates to true in a new g++.dg/cpp2a/is-constant-evaluated-*.C testcase.