Mspack: Serializing *big.Float (panic: runtime error: invalid memory address or nil pointer..) | Discord Gophers | Page 1

upper tundra Jul 26, 2023, 9:42 PM

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which msg pack library do you use?

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also your error message has nothing to do with the library itself but actually with you defining a *big.Float pointer that is nil and not initialized.

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https://pkg.go.dev/math/big#NewFloat

upper tundra Jul 27, 2023, 9:28 AM

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does this code that you posted work?

upper tundra Jul 27, 2023, 9:59 AM

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maybe you will need to manually encode it: https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#CustomEncoder

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as well as decode

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I would suggest directly usong the typ without wrapping it in a struct

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big.Float implements encoding.Text(Un)Marshaler which is seemingly checked by msgpack. You wrapping in a different struct hides that implementation

kindred jay Jul 27, 2023, 10:30 AM

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just implement the interfaces for your custom type. the implementations should use value receiver and should just call (*big.Float).(Un)MarshalText

#Mspack: Serializing *big.Float (panic: runtime error: invalid memory address or nil pointer..)