class RatStr is Allomorph is Rat {}

RatStr is a dual value type, a subclass of both Allomorph, hence Str, and Rat.

See Allomorph for further details.

my $rat-str = <42.1>;
say $rat-str.^name;       # OUTPUT: «RatStr␤»

my Rat $rat = $rat-str;   # OK!
my Str $str = $rat-str;   # OK!

# ∈ operator cares about object identity
say 42.1 ∈ <42.1  55  1>; # OUTPUT: «False␤»

Methods

method new

method new(Rat $i, Str $s)

The constructor requires both the Rat and the Str value, when constructing one directly the values can be whatever is required:

my $f = RatStr.new(42.1, "forty two and a bit");
    say +$f; # OUTPUT: «42.1␤»
    say ~$f; # OUTPUT: «"forty two and a bit"␤»

method Capture

method Capture(RatStr:D: --> Capture:D)

Equivalent to Mu.Capture.

method Numeric

multi method Numeric(RatStr:D: --> Rat:D)
    multi method Numeric(RatStr:U: --> Rat:D)

The :D variant returns the numeric portion of the invocant. The :U variant issues a warning about using an uninitialized value in numeric context and then returns value 0.0.

method Rat

method Rat

Returns the Rat value of the RatStr.

method Real

multi method Real(Real:D: --> Rat:D)
    multi method Real(Real:U: --> Rat:D)

The :D variant returns the numeric portion of the invocant. The :U variant issues a warning about using an uninitialized value in numeric context and then returns value 0.0.

Operators

infix ===

multi infix:<===>(RatStr:D $a, RatStr:D $b)

RatStr Value identity operator. Returns True if the Rat values of $a and $b are identical and their Str values are also identical. Returns False otherwise.