Offset into source character array
This is now an abstract class, only to work around the optimizer: methods in traits are never inlined.
An interface to most of mutable data in Scanner defined in TokenData and CharArrayReader (+ next, prev fields) with copyFrom functionality to backup/restore data (used by quasiquotes' lookingAhead).
A scanner for a given source file not necessarily attached to a compilation unit.
A scanner over a given compilation unit
Returns the string representation of given token.