November 24, 2014 Something between a scalar and an enum | ||||
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An enumeration contains a small number of distinct elements: enum Colors { red, green, yellow, brown } While an integral numeric value encodes a scalar: uint x; x = 120; x++; A sufficiently common pattern in my code is to have something intermediate: that has a small group of special values, plus many values identified just by a number. alias Unit = uint; enum : Uint { EmptyUnit = 0, BrokenUnit = Unit.max - 1, MissingUnit = Unit.max } This allows me to denote some special units, plus count the units starting from 1 up to millions or more. It's unfortunate the D type system doesn't offer me much good to express this idiom, but I am not sure how much a type system can help here even in principle. Bye, bearophile |
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