Documentation for method succ, assembled from the following types:
Returns the number incremented by one (successor).
method succ(Date:D:) returns Date:D
Returns the following day
method succ(Str:D) returns Str:D
Returns the string incremented by one.
String increment is "magical". It searches for the last alphanumeric sequence that is not preceeded by a dot, and increments it.
'12.34'.succ # 13.34 'img001.png'.succ # img002.png
The actual incrementation step works by mapping the last alphanumeric character to a character range it belongs to, and chosing the next character in that range, carrying to the previous letter on overflow.
'aa'.succ # ab 'az'.succ # ba '109'.succ # 110 'α'.succ # β 'a9'.succ # b0
String increment is Unicode-aware, and generally works for scripts where a character can be uniquely classified as belonging to one range of characters.