From fe69bee34c645589d3f2a489d7c67c349960410d Mon Sep 17 00:00:00 2001 From: Jonathan Wakely Date: Tue, 24 Sep 2019 15:17:08 +0100 Subject: [PATCH] Remove check for impossible condition in std::variant::index() The __index_type is only ever unsigned char or unsigned short, so not the same type as size_t. * include/std/variant (variant::index()): Remove impossible case. From-SVN: r276100 --- libstdc++-v3/ChangeLog | 2 ++ libstdc++-v3/include/std/variant | 4 +--- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 64f8618..7daabe5 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,7 @@ 2019-09-24 Jonathan Wakely + * include/std/variant (variant::index()): Remove impossible case. + PR libstdc++/91871 * testsuite/util/testsuite_hooks.h (conversion::iterator_to_const_iterator()): Do not return an invalid diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant index c004324..646ef41 100644 --- a/libstdc++-v3/include/std/variant +++ b/libstdc++-v3/include/std/variant @@ -1520,9 +1520,7 @@ namespace __variant constexpr size_t index() const noexcept { using __index_type = typename _Base::__index_type; - if constexpr (is_same_v<__index_type, size_t>) - return this->_M_index; - else if constexpr (__detail::__variant::__never_valueless<_Types...>()) + if constexpr (__detail::__variant::__never_valueless<_Types...>()) return this->_M_index; else if constexpr (sizeof...(_Types) <= __index_type(-1) / 2) return make_signed_t<__index_type>(this->_M_index); -- 2.7.4