Reserved fields not allowed in enums.

[benoit-sb]

Hi and thanks for the project! I have found a small issue which is not blocking but yet interesting to point out.

Issue

ocaml-protoc cannot compile an enum that contains the reserved keyword.

Steps to reproduce

Write a myenum.proto file with the following content

// myenum.proto
syntax = "proto3";

enum MyEnum {
  foo = 0;
  reserved 1;
}

Compile it with ocaml-protoc

$ ocaml-protoc ./myenum.proto --ml_out .
./myenum.proto:5:10: Parsing error at `foo = 0 ; reserved <<< HERE'.
zsh: exit 1

However it works as expected with the official protoc compiler

$ protoc --python_out=. ./myenum.proto
zsh: exit 0

Workaround

Replace the reserved keyword by a field which explicitly prevents usage.

enum MyEnum {
  foo = 0;
  OBSOLETE_bar = 1 [deprecated = true];
}

Versions

ocaml-protoc: 3.1.1
ocaml: 4.14.2

[c-cube]

That makes sense, indeed.