ref: ed2bcb605e43881ebe854040f1e3e6f918ed9b26
dir: /test/matchargstr.myr/
use std
/* checks pattern matching on unions with arguments.
exits with 42. */
type u = union
`Int int
`Str byte[:]
`Nil
;;
const main = {
var v
v = `Str "asdf"
match v
| `Int 127: std.fatal("wrong match `Int 127\n")
| `Str "foo": std.fatal("Wrong match `Str \"foo\"\n")
/* make sure we backtrack for the test */
| `Str "asfd": std.fatal("Wrong match `Str \"fsda\"\n")
| `Str "asdf": std.put("Correct `Str \"asdf\"!\n")
| `Nil: std.fatal("Wrong match `Str \"fsda\"\n")
| _: std.fatal("Impossible failed match\n")
;;
}