pattern matching demo in Io

pattern_match.io

// Work in progress, code coming soon:

Io> match(1) [2: 5, 4: 2, 1: "yay"]
==> yay
Io> match(2) [2: 5, 4: 2, 1: "yay"]
==> 5
Io> a := 10
==> 10
Io> match(a) [2: 5, 4: 2, 10: "yay"]
==> yay
Io> match(a) [2: 5, 4: 2, a: "yay"]

  Exception: Object does not respond to 'a:' // <-- probably won't be fixed

           :(     :(     :(

match(a) [2: 5, 4: 2, a : "yay"] // works, note the space between 'a' and ':'

'a:' is a valid slot name, and the slot constructor has to be legal in slot names for it to work at all (without changing the reader anyhow)