Literal and range patterns

Patterns can compare exact integer, boolean, or string literals. Integer ranges use half-open .. or inclusive ..= bounds. Strings can match a prefix, suffix, or contained part.

These are refutable patterns, so they belong in a match, conditional pattern, or a let with a divergent failure branch.

fn age_group(age: int) -> string {
  match age { 13..=19 => "teen", _ => "other" }
}

fn kind(path: string) -> string {
  match path { ..".zip" => "archive", _ => "other" }
}

fn main() {
  println(age_group(16))
  println(kind("notes.zip"))
}