Course of Raku / Advanced / Control flow / given and when / Exercises / Match by type

Solution: Match by type

Here is a possible solution to the task.

Code

my $value = 3.14;

given $value {
    when Int { say 'integer' }
    when Rat { say 'rational' }
    when Str { say 'string' }
}

🦋 You can find the source code in the file match-by-type.raku.

Output

rational

Comments

1. When the value to match is a type, the smart match asks whether the topic is of that type. 3.14 is not an Int, so the first when is skipped.

2. A decimal literal like 3.14 is a Rat (a rational number) in Raku, so the second when matches and the program prints rational.

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