Jason Merrill
d950b005f9
In this PR, we were unnecessarily rejecting a constexpr initializer_list with no elements. This seems like a fairly useless degenerate case, but it makes sense to avoid allocating an underlying array at all if there are no elements and instead use a null pointer, like the initializer_list default constructor. If the (automatic storage duration) list does have initializer elements, we continue to reject the declaration, because the initializer_list ends up referring to an automatic storage duration temporary array, which is not a suitable constant initializer. If we make it static, it should be OK because we refer to a static array. The second hunk fixes that case. It also means we won't diagnose some real errors in templates, but those diagnostics aren't required, and we'll get them when the template is instantiated. * call.c (convert_like_real) [ck_list]: Don't allocate a temporary array for an empty list. * typeck2.c (store_init_value): Don't use cxx_constant_init in a template. From-SVN: r268827
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