These are @<file> and -Dkey=val style settings, which don't nicely map to identifiers.
Path related settings.
Other settings.
(standardScalaSettings: StringAdd).self
(standardScalaSettings: StringFormat).self
(standardScalaSettings: ArrowAssoc[StandardScalaSettings]).x
(Since version 2.10.0) Use leftOfArrow
instead
(standardScalaSettings: Ensuring[StandardScalaSettings]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Settings which aren't behind a -X, -Y, or -P option. When possible, the val and the option have identical names. The abstract settings are commented as to why they are as yet implemented in MutableSettings rather than mutation-generically.