Adds signed std::ssize() alongside unsigned size().
Other papers in Ranges
P0896R4The One Ranges proposalSan Diego 2018P1252R2Ranges design cleanupKona 2019P1035R7Input range adaptorsCologne 2019P1207R4Movability of single-pass iteratorsCologne 2019P1474R1Helpful pointers for
ContiguousIteratorCologne 2019P1522R1Iterator difference type and integer overflowCologne 2019All 19 papers in Ranges →