Fixes CTAD for aggregates.
Other papers in CTAD improvements (C++20)
P0702R1Language support for constructor template argument deductionToronto 2017P0739R0Some improvements to class template argument deduction integration into the standard libraryToronto 2017P1814R0Class template argument deduction for alias templatesCologne 2019P1816R0Class template argument deduction for aggregatesCologne 2019All 5 papers in CTAD improvements (C++20) →