In this technical blog post, Nicolas Hery explores implementing sum types (also known as union types or variant records) in Go to mimic their behavior found in languages like Vlang and Rust. He demonstrates how to create a simple example with different object actions such as creating, updating, deleting single objects, and deleting all objects within an abstract `Action` type. The author also discusses JSON encoding/decoding for these sum types using custom marshallers and unmarshallers in Go’s standard library. Additionally, he provides links to implementations of this example with various other languages such as Haskell, OpenAPI, Protocol Buffers (protobuf), Rust, TypeScript, and Vlang. Finally, the article briefly mentions a potential alternative language called Vlang that combines aspects of Go and Rust while offering sum types natively in its syntax.
The author concludes by sharing an existing repository containing all these implementations for comparison purposes under different languages’ contexts.\
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