A tiny language that compiles to WebAssembly, right here in your browser
The lexer cuts the source into tokens, dropping spaces and comments.
The parser builds this tree; the type checker adds a type to every expression.
The code generator's output in the WebAssembly text format: the same instructions as the bytes, readable.
The module itself, byte by byte, exactly as the browser receives it. Hover a byte to see which part it belongs to.
int (32-bit), float (64-bit) and bool. Ints and floats never mix silently: convert with float(n) or int(x).
let n = 42;
let x: float = 2.5;
let ok = n > 40 && x < 3.0;if/else, while, for i in a..b (b not included), break, continue and return.
for i in 0..10 {
if i % 2 == 0 { continue; }
print(i);
}Parameters and results have types; every path must return. Recursion works.
fn gcd(a: int, b: int) -> int {
if b == 0 { return a; }
return gcd(b, a % b);
}