Strings

Strings are owned UTF-8 byte buffers with a {ptr, len, cap} layout — similar to Rust's String. All methods are built-in, no imports needed.

Basics

let greeting = "hello"
let name = "world"

let message = greeting + " " + name   // concatenation
let n = message.len                    // length
let first = message[0]                 // byte indexing (u8)
let hello = message[0..5]             // slicing
let copy = greeting.clone()            // deep copy

Built-in methods

let s = "Hello, World!"

s.contains("World")              // true
s.startsWith("Hello")           // true
s.endsWith("!")                 // true

s.toLower()                     // "hello, world!"
s.toUpper()                     // "HELLO, WORLD!"
s.trim()                         // removes leading/trailing whitespace

s.split(", ")                    // Vec<string>: ["Hello", "World!"]
s.replace("World", "Milo")      // "Hello, Milo!"
s.indexOf("World")             // Option<i64>: Some(7)
s.repeat(3)                      // "Hello, World!Hello, World!Hello, World!"

Building strings

var s: string = ""
s.push('h')
s.push('i')
// s is now "hi"

Number to string

let n: i64 = 42
let s = n.toString()          // "42"

let pi: f64 = 3.14
let t = pi.toString()         // "3.14"

String comparison

if greeting == "hello" {
    print("match!")
}

FFI

Strings auto-coerce to *u8 when passed to extern fn declarations.

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