In [locale.category] paragraph 1, the category members are described as bitmask elements. In fact, the bitmask requirements in [bitmask.types] don't seem quite right: none and all are bitmask constants, not bitmask elements.

In particular, the requirements for none interact poorly with the requirement that the LC_* constants from the C library must be recognizable as C++ locale category constants. LC_* values should not be mixed with these values to make category values.

We have two options for the proposed resolution. Informally: option 1 removes the requirement that LC_* values be recognized as category arguments. Option 2 changes the category type so that this requirement is implementable, by allowing none to be some value such as 0x1000 instead of 0.

Nathan writes: "I believe my proposed resolution [Option 2] merely re-expresses the status quo more clearly, without introducing any changes beyond resolving the DR.