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by catlifeonmars
1602 days ago
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Proper compile time sum types would be great. I find myself reimplementing sum types at runtime far too often, especially when it comes to parsing JSON. My go to is a function with a signature along the lines of the reflect packages dynamic select: func UnmarshalOneOf(data []byte, args []interface{}) (index int, err error) Which I use like this: variants := []interface{}{
&T1{}, &T2{}} i, err := UnmarshalOneOf(data, variants) // … return variants[i] |
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