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- Language Guide (proto 3) | Protocol Buffers Documentation
The default values are type-specific: For strings, the default value is the empty string For bytes, the default value is empty bytes For bools, the default value is false For numeric types, the default value is zero For message fields, the field is not set Its exact value is language-dependent See the generated code guide for details
- Why are there no custom default values in proto3?
My understanding is that proto3 no longer allows you to detect field presence and no longer supports non-zero default values because this makes it easier to implement protobufs in terms of "plain old structs" in various languages, without the need to generate accessor methods
- Protobuf: message field and default values · GitHub
Proto3 specification defines it explicitly - default value is null: When a message is parsed, if the encoded message does not contain a particular singular element, the corresponding field in the parsed object is set to the default value for that field
- Proto2 vs Proto3 vs Proto Editions - hackingnote. com
Proto3: enums require an entry with the value 0 to act as the default value Proto2 : enums use the first syntactic entry in the enum declaration as the default value where it is otherwise unspecified
- Language Guide(proto3) · ProtoBuf - lxbwolf. gitbooks. io
This guide describes how to use the protocol buffer language to structure your protocol buffer data, including proto file syntax and how to generate data access classes from your proto files It covers the proto3 version of the protocol buffers language: for information on the older proto2 syntax, see the Proto2 Language Guide
- Protobuf • Timothy Andrew
Default Values (proto3) The optional keyword is not required, but fields automatically default to a certain type-specific value: For strings, the default value is the empty string For bytes, the default value is empty bytes For bools, the default value is false For numeric types, the default value is zero
- how to give default values in protocol buffer? - Stack Overflow
If the default value is not specified for an optional element, a type-specific default value is used instead: for strings, the default value is the empty string For bools, the default value is false For numeric types, the default value is zero For enums, the default value is the first value listed in the enum's type definition This means
- Handling of default values do not conform with proto3 language guide
Proto3 language guide states: When a message is parsed, if the encoded message does not contain a particular singular element, the corresponding field in the parsed object is set to the default value for that field Looking at protons's
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