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class RatStr is Allomorph is Rat {}

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

See Allomorph for further details.

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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␤»

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Methods §

method new §

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method new(Rat $i, Str $s)

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

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

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method Capture §

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

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Equivalent to Mu.Capture.

method Numeric §

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

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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 §

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method Rat

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Returns the Rat value of the RatStr.

method Real §

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

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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 ===§

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

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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.