julian-wiseman
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| import std.stdio; | |
| // secret sauce: https://dlang.org/spec/class.html#alias-this | |
| struct DayNum { | |
| int dn; | |
| alias dn this; // this line makes DayNum look like an int with dn as the value | |
| } | |
| DayNum next(DayNum d) { |