Protoparse cannot parse default float values with only '.' at the end

[bufdev]

Another edge case:

// b.proto

syntax = "proto2";

message Foo {
  optional float one = 1 [default = 100.];
  optional double two = 2 [default = 200.];
}

• protoc b.proto -o /dev/null completes successfully
• goprotoc b.proto -o /dev/null returns b.proto:6:40: syntax error: unexpected '.', expecting ',' or ']' (if you comment out the field one, it will also return an error on line 7, but you won't get both errors until protoparse: add error productions to the grammar and update validation to return multiple errors #225 is done)

I verified that 100 and 100.0 work.

[jhump]

Interesting. I did not realize this was considered valid in protoc. I don't think this one is hard either though.

[jhump]

Fixed in #262