proto, runtime/protoiface: add support for fast-path marshaling
Allow message implementations to provide optimized versions of standard
operations. Generated messages now include a ProtoReflectMethods method,
returning a protoiface.Methods struct containing pointers to assorted
optional functions.
The Methods struct also includes a Flags field indicating support for
optional features such as deterministic marshaling.
Implementation of the fast paths (and tests) will come in later CLs.
Change-Id: Idd1beed0ecf43ec5e5e7b8da2ee1e08d3ce32213
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/170340
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
diff --git a/cmd/protoc-gen-go/internal_gengo/reflect.go b/cmd/protoc-gen-go/internal_gengo/reflect.go
index 2d0a9ff..129a735 100644
--- a/cmd/protoc-gen-go/internal_gengo/reflect.go
+++ b/cmd/protoc-gen-go/internal_gengo/reflect.go
@@ -265,6 +265,9 @@
g.P("return ", typesVar, "[", idx, "].MessageOf(x)")
g.P("}")
g.P()
+ g.P("func (m *", message.GoIdent, ") XXX_Methods() *", protoifacePackage.Ident("Methods"), " {")
+ g.P("return ", typesVar, "[", idx, "].Methods()")
+ g.P("}")
}
func rawDescVarName(f *fileInfo) string {