LYR-PAR0017

a '{' is missing, or a body without braces

error · spec 07-statements

The body of if, else, while, do or for is a single statement without braces, or a block, a match body, or the body of a struct, class, enum, interface or extend does not open with {.

Explanation

The body of a control statement is a block, braced even around one statement: if (c) { f(); }. A braceless body is refused once and read as the block it belongs in. Declarations and match open their bodies with { as well.

Put the body in braces.

Wrong

fn main(): void {
    let c = true;
    var n = 0;
    if (c) n = 1;
}

Right

fn main(): void {
    let c = true;
    var n = 0;
    if (c) {
        n = 1;
    }
    let _ = n;
}