Go can actually decode numbers into an “arbitrary precision” raw token (json.Number, which is a wrapper around []byte). You can turn this on at the decoder leve

Go can actually decode numbers into an “arbitrary precision” raw token (json.Number, which is a wrapper around []byte). You can turn this on at the decoder level or for a particular field. I often do this for more fine grained control of number decoding without needing to drop to the tokenizer.