tree 956ca7529d9b91c4782b23774fb27f6e665a8dd9
parent 77f82fe6bc94bb051d1164a8b7b50c6e03ef94a9
author Damien Neil <dneil@google.com> 1536876430 -0700
committer Damien Neil <dneil@google.com> 1536877209 +0000

cmd/protoc-gen-go: add support for map fields

Generate the proper map[key]value type for map fields.
Include the protobuf_key and protobuf_val field tags.
Do not generate the map entry structs.

Fix an initialization order bug in protogen: While proto files cannot
contain circular dependencies, a single file can contain dependency
cycles. First create types for all the descriptors in a file, then add
in references (currently just field->message and field->enum) in a
second pass.

Change-Id: Ifedfa657d8dbb00413ba493adee1119b19c1b773
Reviewed-on: https://go-review.googlesource.com/135355
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>