Specifying // +protobuf.nullable=true on a Go type that is an alias of a
map or slice will generate a synthetic protobuf message with the type
name that will serialize to the wire in a way that allows the difference
between empty and nil to be recorded.
For instance:
// +protobuf.nullable=true
types OptionalMap map[string]string
will create the following message:
message OptionalMap {
map<string, string> Items = 1
}
and generate marshallers that use the presence of OptionalMap to
determine whether the map is nil (rather than Items, which protobuf
provides no way to delineate between empty and nil).
Remove some indentation from file generation for specific languages,
allow SnippetWriter's io.Writer to be accessed, and add Path to
types.Name for languages where Package and Path can be disjoint.
* Add support for pointers, map keys, more builtins, Alias types
* Support for packages & imports
* Add helper functions to types
* change generation interface
* fix naming/ordering
* SnippetWriter for templates
* Naming systems
* Use the standard packages for import resolution
* Documentation
