2 Commits

Author	SHA1	Message	Date
Karoy Lorentey	a84ece7a26	[stdlib] Bitset: Eliminate a trap that wasn’t optimized away ... Signed/unsigned integer conversions check for unrepresentable values; this wasn’t recognized as impossible, so a trap got compiled into the Dictionary lookup path. Note to self: next time just use bitwise operations.	2018-09-22 02:04:10 +01:00
Karoy Lorentey	1848b37300	[stdlib] Add bitset constructs ... Bitsets implement sorted sets over nonnegative integers up to a predetermined maximum value. These are intended to replace _UnsafeBitMap. The latter will be removed once its usages are eliminated. - _UnsafeBitset.Word is the underlying abstraction, implementing a bitset using a single UInt value. - _UnsafeBitset is a view over a contiguous range of words. - _Bitset is a COW value type implementing the same construct.	2018-09-22 02:04:04 +01:00