Official Go implementation of the Ethereum protocol

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Felix Lange 96fb839133 rlp: improve nil pointer handling (#20064) ... * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.		5 years ago
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decode.go	rlp: improve nil pointer handling (#20064)	5 years ago
decode_tail_test.go	all: update license information	9 years ago
decode_test.go	rlp: improve nil pointer handling (#20064)	5 years ago
doc.go	rlp: improve nil pointer handling (#20064)	5 years ago
encode.go	rlp: improve nil pointer handling (#20064)	5 years ago
encode_test.go	rlp: improve nil pointer handling (#20064)	5 years ago
encoder_example_test.go	rlp: improve nil pointer handling (#20064)	5 years ago
raw.go	rlp: fix string size check in readKind (#15625)	7 years ago
raw_test.go	rlp: fix string size check in readKind (#15625)	7 years ago
typecache.go	rlp: improve nil pointer handling (#20064)	5 years ago