// mers doesn't have structs, so instead we define a type:
type myStruct [
    int,
    string
]
// to give names to the fields, we define functions:
fn count(s myStruct) s.0
// to allow users to change the value, add &myStruct to the valid types for s (only through references can values be changed)
fn note(s myStruct/&myStruct) s.1

my_struct := [12, "test"]

my_struct.count().debug()

my_struct.note().debug()

&my_struct.note() = "changed"

my_struct.note().debug()