An addition or subtraction on an enum whose constant operand's numeric
value does not fit the underlying type (an int constant standing for a
high uint member, e.g. -501 for 0xfffffe0b) failed to resolve as enum
arithmetic and fell back to integer arithmetic with casts, producing
'(uint)((int)value - -501)' and, for the same source expression in an
argument position, '(uint)value - 4294966795u'. Retry the failed
resolution once with constant operands reinterpreted in the enum type;
the reinterpretation is lossless whenever the constant's stack type
matches the enum's underlying stack type, because the IL constant is
the member's bit pattern. Valid non-enum resolutions like 'data - 1'
(enum minus underlying, yielding the enum) are unaffected because the
retry only runs when the plain resolution fails.
Assisted-by: Claude:claude-fable-5:Claude Code
Siegfried Pammer