Documentation for routine pred assembled from the following pages:
Class: Date §
From Date
(Date) method pred §
Defined as:
method pred(Date: --> Date)Returns a Date of the previous day. "pred" is short for "predecessor".
say Date.new("2016-01-01").pred; # OUTPUT: «2015-12-31»Class: Numeric §
From Numeric
(Numeric) method pred §
method pred(Numeric:)Returns the number decremented by one (predecessor).
Enum: Bool §
From Bool
(Bool) routine pred §
method pred(--> Bool)Returns False.
say True.pred; # OUTPUT: «False» say False.pred; # OUTPUT: «False»pred is short for "predecessor"; it returns the previous enum value. Bool is a special enum with only two values, False and True. When sorted, False comes first, so False is the predecessor to True. And since False is the "lowest" Bool enum value, its own predecessor is also False.
Class: Allomorph §
From Allomorph
(Allomorph) method pred §
method pred(Allomorph:)Calls Numeric.pred on the invocant's numeric value.
Class: IO::Path §
From IO::Path
(IO::Path) method pred §
Defined as:
method pred(IO::Path: --> IO::Path)Returns a new IO::Path constructed from the invocant, with .basename changed by calling Str.pred on it.
"foo/file02.txt".IO.pred.say; # OUTPUT: «"foo/file01.txt".IO»Class: Str §
From Str
(Str) method pred §
method pred(Str: --> Str)Returns the string decremented by one.
String decrementing is "magical" just like string increment (see succ). It fails on underflow
'b0'.pred; # OUTPUT: «a9» 'a0'.pred; # OUTPUT: Failure 'img002.png'.pred; # OUTPUT: «img001.png» Role: Enumeration §
From Enumeration
(Enumeration) method pred §
Defined as:
method pred(::?CLASS:)say Freija.pred; # OUTPUT: «Oðin»