Basic Types

int

A 64-bit two’s complement signed integer.

let x = 3
let y = -42
let z = 1048576

bool

A boolean. true and false are literal bool values.

let is_cool = true

string

A UTF-8 encoded string with no internal null bytes.

Literal string values are surrounded by double-quotes ("). String literals support escapes for \n, \", \\, and two-digit hex escapes \xNN.

let s = "Hello my name is \"Fred\""
let t = "Control Characters:\n STX \x01 BEL \x07"
//let u = "Null-terminated\x00"  // internal null byte not allowed!

bytes

Bytes represents an arbitrary byte sequence. It is similar to a string, but it provides no validation for its contents, nor any way to specify a literal. The id type below is similar, but fixed-length and should be preferred specifically for identifier types.

id

An opaque type for object identifiers. It is not possible to specify literal ids.