Names

Backquotes an identifier that Scala would otherwise reject.

Escapes a dotted package so each segment can be a Scala identifier.

The package segment derived from a file name, for the non-flat package layout.

The Scala object name for a .proto file, as my_file.proto to MyFileProto.

foo_bar to fooBar, or to FooBar with upperInitial.

Follows protoc's own rule rather than a general one, because the generated names have to match what every other protobuf implementation produces: a digit makes the next letter uppercase, and an already-uppercase first letter is lowered unless the caller asked for Pascal case.

Strips an enum's own name from the front of one of its values.

proto style prefixes every value with the enum name (Color.COLOR_RED), which in Scala reads as a stutter (Color.COLOR_RED where Color.RED would do). Comparison ignores underscores and case, so COLOR_RED, Color_Red and colorRed all strip. A value that would be left empty, starting with a digit, or no longer unique is left alone.

fooBar to FOO_BAR, for enum values renamed to Scala's constant convention.

Every word Scala 3 will not accept as a plain identifier.

Longer than Scala 2's list: enum, given, export, then, ?=> and the soft keywords arrived with Scala 3, and proto files in the wild do contain fields called type, object and val.